Answer:
They move at a rate of one to two inches (three to five centimeters) per year.
Explanation:
The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other.
3. Predict the change in electronegativity of the next elements in a row (C, Si), then check those properties. Do they match your predictions?
The elements which come after 'C' and 'Si' are 'Ge' and 'Sn'. The element 'F' is the most electronegative element. Down the group the electronegativity generally decreases.
What is electronegativity?The electronegativity of an atom is defined as the relative tendency or power of the bonded atom in a molecule to attract the shared pair of electrons towards itself.
In general the electronegativity decreases on moving down a group. The increase in the size of atoms and the shielding effect of inner electrons decreases the electronegativity.
Here 'Ge' and 'Sn' comes below 'C' and 'Si'.
Thus the electronegativity of the elements after 'C' and 'Si' decreases.
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Which of the following best explains many physical properties of a material?
The arrangement of its atoms or molecules best explains many physical properties of a material.
What is Metal?
A metal is a type of material that is typically hard, shiny, malleable, ductile, and has good electrical and thermal conductivity. Metals are characterized by their ability to form cations, which are positively charged ions, by losing electrons. They typically have metallic bonds, which are formed when the outermost electrons of metal atoms are delocalized and shared among a lattice of metal ions. This results in metals having a unique set of physical and chemical properties, such as high melting and boiling points, high density, and good strength-to-weight ratios, making them useful for a wide range of applications, including construction, transportation, electronics, and manufacturing.
Many physical properties of a material can be explained by its atomic and molecular structure. The arrangement of atoms and molecules in a material determines its physical properties such as density, melting and boiling points, thermal conductivity, electrical conductivity, and more. For example, a material with a tightly packed atomic arrangement will be denser than a material with a more open arrangement. Similarly, the strength of the bonds between atoms and molecules will determine how much energy is required to melt or boil the material.
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you have 5L of a stock solution of 6M AgNO3, you need a 3M AgNO3 strength solution for a lab assignment. What volume of 3M could you make from the stock solution.
The volume of 3M from making stock solution is 7.5 liters.
To make a 3M solution from a 6M stock solution of AgNO3, we need to add water to the stock solution. Let us assume x liters of 3M solution from 5 liters of the 6M stock solution.
The amount of AgNO3 in the 5 liters of the stock solution is:
5 L * 6 mol/L = 30 mol AgNO3
To make a 3M solution, we need:
3 mol/L * x L = 3x mol AgNO3
We can use the formula:
C1V1 = C2V2
where,
C1 = concentration of the stock solution
C2 = concentration of the final solution
V1 = volume of stock solution
V2 = volume of the final solution
In this case, we know that:
C1 = 6 M
C2 = 3 M
V1 = x
V2 = 5 L + x
In this case, we know that:
C1 = 6 M
C2 = 3 M
V1 = x
V2 = 5 L + x
let us substitute the above values in the formula
6 M * V1 = 3 M * (5 L + x)
Solving for x, we get:
x = 2.5 L
Therefore, to make a 3M solution from a 6M stock solution, a final volume of 5 + 2.5 = 7.5 liters to get a 3M solution.
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How many grams of ice at −15◦C must be
added to 30 grams of water at 45◦C to result
in ONLY liquid water at exactly 0◦C?
1. 17.0 g
2. 13.7 g
3. 15.5 g
4. 19.2 g
5. 21.1 g
Explanation:
Refer to pic...........
.
A balanced chemical equation allows one to determine the
A) mechanism involved in the reaction.
B) electron configuration of all the elements in the reaction.
C) energy released in the reaction.
D) mole ratio of any 2 substances in the reaction
The correct option is D) mole ratio of any 2 substances in the reaction.
A balanced chemical equation describes the identities and quantities of the reactants and products involved in a chemical reaction. It specifies the number of molecules or moles of each substance required and produced in the reaction.
The coefficients can determine the mole ratio of any two substances involved in the reaction in a balanced equation. This information is critical for predicting how much product can be obtained from a given amount of reactant or determining the limiting reactant in a reaction.
Knowing the mole ratio also allows for precise stoichiometric calculations, which can be used in various chemical applications such as synthesis, chemical analysis, and industrial processes.
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When 12 moles of O₂ reacts with 1.1 mole of C10H8 what is the limiting reactant? C10H8 + 12 O₂ -> 10 CO₂ + 4H₂O
O₂
Explanation:A limiting reactant is the reactant that runs out first in a reaction.
Oxygen
To find the limiting reactant, we can find how many reactions will occur with the given amount of reactant. To do this we can divide moles of the reactant by moles per reaction. If the reaction occurs 1 time, we say that 1 mol of reaction is created. So, the reactant that forms fewer moles of reaction is the limiting reactant.
Moles of reaction = [tex]\displaystyle \frac{12molO_{2} }{1}*\frac{1molrxn}{12mol_{2} }[/tex]= 1 mol[tex]_{rxn}[/tex]This means that with 12 moles of oxygen, 1 full reaction will occur (1 mol of reaction).
Naphthalene (C₁₀H₈)
Now, we can do the same equation with Naphthalene. If it creates fewer moles of reaction, then it is the limiting reactant. If not, then oxygen is the limiting reactant.
Moles of reaction = [tex]\displaystyle \frac{1.1molC_{10}H_{8} }{1} *\frac{1molrxn}{1molC_{10}H_{8}}[/tex] = 1.1 mol[tex]_{rxn}[/tex]This means that 1.1 moles of Naphthalene will create 1.1 mol of reaction.
Limiting Reactant
The math above shows that the amount of oxygen given will only create 1 mol of reaction, while the Naphthalene forms 1.1 mols of reaction. Thus, oxygen is the limiting reactant because it creates fewer moles of reaction.
PLEASE HELP!!
Classify each reaction as synthesis, decomposition, single replacement, double
replacement, or combustion.
>
NaOH + CuSO4 → Na2 SO4 + Cu(OH)2
C12H22O11 + O2CO2 + H₂O
NH4NO3 → N₂O + H₂O
BaCl2 + Na2 SO4 → BaSO4 + NaCl
1. synthesis
2. decomposition
3.single
4double displacement
5.combustion
Answer:
NaOH + CuSO₄ → Na₂SO₄ + Cu(OH)₂ is a double displacement reaction
C₁₂H₂₂O₁₁ + 12O₂ --> 12CO₂ + 11H₂O. This is a combustion reaction, as it involves a fuel reacting with oxygen to form carbon dioxide and water. However, this is not a balanced equation and so I have added in the correct ratios to balance the equation.
NH₄NO₃ → N₂O + 2H₂O. This is a decomposition reaction, as it involves the compound ammonium nitrate, 'decomposing' or breaking down into smaller components: dinitrogen oxide and water
BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl. This is a double replacement reaction
Estimate the volume of a piece of molecular cloud that has the same amount of water as your body. Estimate the volume of a piece of molecular cloud that has the same amount of water as your body. Vcloud= 1. 6×1029 cm3 vcloud= 1. 6×1031 cm3 vcloud= 1. 6×1033 cm3 vcloud= 1. 6×1035 cm3
The volume of a piece of molecular cloud that has the same amount of water as your body is [tex]1.6 * 10^31 cm^3.[/tex]
It is said that the water molecules in our body are a part of molecular cloud and its mass density = [tex]3.5*10^{-21} g/cm^3[/tex]
Let the Mass of Water in Body = Mb
We want to find the volume of a piece of molecular cloud(vcloud) with the same amount of water as the body.
We know that the mass of any object is equal to the product of its volume and density.
Therefore, Mb = vcloud x ρcloud
Given that Mb is equal to the mass of water in a person's body (which can be estimated at between 40-70 kg).
It is given that only one millionth of the mass of a molecular cloud is in the form of water molecules.
Then vcloud = [tex](40 * 10^3g) * 10^6/(3.5*10^{-21} g/cm^3)[/tex]
vcloud =[tex]1.6 * 10^{31} cm^3[/tex]
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complete question: The water molecules now in your body were once part of a molecular cloud. Only about one millionth of the mass of a molecular cloud is in the form of water molecules, and the mass density of such a cloud is roughly 3.5×10^−21 g/cm3
Estimate the volume of a piece of molecular cloud that has the same amount of water as your body.
a.) vcloud= 1. 6×10^29 cm3
b.) vcloud= 1. 6×10^31 cm3
c.) vcloud= 1. 6×10^33 cm3
d.) vcloud= 1. 6×10^35 cm3
Why we need to use the archetorien principle in lab report
This principle is important in laboratory reports because it can be used to determine an object's or material's density, which is an important physical property used in many applications.
The Archimedes' principle is a fundamental physics principle that states that the buoyant force acting on an object submerged in a fluid equals the weight of the fluid displaced by the object. It is critical to use the Archimedes' principle in a lab report to accurately and precisely determine the density of the object or material being studied. This principle provides a dependable and accurate method for calculating density, which is useful in many scientific and engineering fields. By including the Archimedes' principle in a lab report, you show that you considered all relevant factors and used appropriate methods to determine the physical properties of the materials being studied.
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Which statement best describes a pure substance? *
It has three visible phases.
It has constant physical properties.
It is heterogeneous.
It has variable composition.
The statement which best describes a pure substance is that it has constant physical properties which is therefore denoted as option B.
What is a Pure substance?This is referred to as a single kind of matter that cannot be separated into other kinds of matter by any physical means.
This type of sample of matter has both definite and constant composition and distinct chemical properties and is referred to as being homogeneous in nature with no form of impurities which is therefore the reason why it was chosen a the correct choice.
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Which set of variables when taken together will result in the
highest pressure?
The variables which when taken together will result in the highest pressure are increased temperature and number of moles.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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1. Mr. Bryan's pet turtle walks 280 feet at a speed of 4ft/min. How long does his walk take? Do not forget to write the word "minutes" after your calculation.
type answer
2.Adrian's mom drove 3 hours to get to San Antonio at a speed of 65 miles per hour (mph). How far away is San Antonio? Do not forget your units- write the word "miles" at the end of your calculation.
Type answer
Answer: 1. is 70 minutes
2. is 195
Explanation: I took the test and I got a B but for sure it's this
It would take Mr. Bryan's pet turtle 70 minutes to walk 280 feet at a speed of 4 feet per minute.
To calculate the time it takes for Mr. Bryan's pet turtle to walk 280 feet at a speed of 4 feet per minute, we can use the formula:
time = distance / speed
Plugging in the given values, we get:
time = 280 feet / 4 ft/min = 70 minutes
Therefore, it would take Mr. Bryan's pet turtle 70 minutes to walk 280 feet at a speed of 4 feet per minute.
The second one is:
According to the given data:
distance = speed x time
where speed is given as 65 miles per hour (mph) and time is given as 3 hours.
Plugging in these values, we get:
distance = 65 mph x 3 hours = 195 miles
Therefore, San Antonio is 195 miles away from Adrian's mom.
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14.87 moles of Magnesium should form 14.87 moles of Magnesium Chloride. 14.77 moles of Hydrochloric acid should form 7.97 moles of Magnesium Chloride. Only 1.78 moles of Magnesium chloride is obtained. What is the percent yield?
PLEASE HELP and teach please
According the question the Percent yield is 11.99%
What is yield?Yield is an economic term referring to the income generated by an investment over a period of time. It is usually expressed as a percentage of the initial investment and is calculated by taking the total income earned and dividing it by the initial investment. Yield is an important measure of the performance of an investment, and is a key factor in determining the attractiveness of an investment. Yields can be calculated for individual investments, or for portfolios of investments. Yields can also be calculated for different types of investments, such as stocks, bonds, and mutual funds. Yields are also used to compare investments with different levels of risk, so investors can make informed decisions about their investments. Yields are affected by a variety of factors, including interest rates, inflation, and market conditions.
The percent yield can be calculated using the formula:
Percent yield = (Actual yield / Theoretical yield) * 100
For Magnesium Chloride, the theoretical yield is 14.87 moles, and the actual yield is 1.78 moles.
Therefore, the percent yield is:
Percent yield = (1.78 / 14.87) * 100 = 11.99%
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How many liters of oxygen gas (at STP) are needed to burn 0.277L butane?
Explanation:
Refer to pic..........
2. When a bubble escapes form a sunken ship, it has a volume of 12.0ml at a pressure of 400.0 atm. and a temp.. of -3.00°C. It reaches the surface where the pressure is 1.10 atm. and the temperature is 27.0°C. What is its new volume? ( round the answer to nearest tens for sig figs)
Answer: 4848.22 mL
Explanation:
V2= P1V1T2/(T1 P2) = (400.00 X 12.0 X 300.15)/(270.15 x 1.10)
What is the mass of 2.007 moles of propane gas, C3H8?
Answer:
To calculate the mass of 2.007 moles of propane gas (C3H8), we need to first determine its molar mass.
The molar mass of propane (C3H8) can be calculated as:
3(C) + 8(H) = (3 x 12.01 g/mol) + (8 x 1.01 g/mol) = 44.11 g/mol
Therefore, the mass of 2.007 moles of propane is:
Mass = 2.007 moles x 44.11 g/mol = 88.46 g
So, the mass of 2.007 moles of propane gas (C3H8) is 88.46 g.
How many mol of CaSO3 were left after the water was driven off? To answer this, What is the molar mass of 1 mol of CaSO3?
Multiply the molar mass of 1 mol times the mass 7.00g to get mol.
There are 5 mol of CaSO3 were left after the water was driven off.
What is molar mass ?The molar mass is the substance; it helps to determine the mass of the sample substance to the atom of the sample or substance. The molar mass depends on the molecular formula and the isotopes of the atom. Molar mass is used for the inducement of electric charge. Molar mass is the measurement of the volume of the mass.
What is moles?
A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.
Therefore, are 5 mol of CaSO3 were left after the water was driven off.
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If the brine contains 138 g of NaCl, how much Cl2 can be produced?
Answer:
167.5g
Explanation:
From the question, we know the mass of NaCl and the molar mass of NaCl, so we can calculate the number of moles of NaCl:
Moles = mass ÷ molar mass
The molar mass of NaCl can be calculated by adding the relative formula masses of the elements Na and Cl:
23.0 + 35.5 = 58.5
We can use the formula to find the number of moles of NaCl:
moles = 138 ÷ 58.5
= 2.35897...
Now, we need to find the mass of Cl2. Rearranging the formula of moles = mass ÷ molar mass
mass = moles × molar mass
Calculating the molar mass of Cl2 by adding the relative atomic masses:
35.5 + 35.5 = 71
Hence the mass is:
2.35897... × 71 = 167.5g (to 1dp)
21 The diagram shows an experiment. A B blue litmus paper D aqueous ammonium chloride What happens to the pieces of litmus paper? + aqueous sodium hydroxide blue litmus paper changes colour changes colour no colour change no colour change SHIRED heat red litmus paper changes colour no colour change changes colour no colour change red litmus paper
Three is no change in the blue litmus but the red litmus change color. This is because the ammonia turns red litmus blue due to ammonia.
What is the reaction of ammonium chloride and sodium hydroxide?When ammonium chloride and sodium hydroxide are mixed, they undergo a neutralization reaction to form ammonium hydroxide and sodium chloride. The chemical equation for this reaction is:
NH4Cl + NaOH → NH4OH + NaCl
In this equation, NH4Cl represents ammonium chloride, NaOH represents sodium hydroxide, NH4OH represents ammonium hydroxide, and NaCl represents sodium chloride.
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Identify the substance that each property describes. Only acid only base both acid and base
The substance that each property describes are - feels slippery - only base; tastes sour - only acid; conducts electricity - both acid and base
The three properties listed are common characteristics of acids and bases, but they can be used to identify which substance is an acid, which is a base, or which substance has both acidic and basic properties.
Feels slippery: This is a property of bases. When a substance feels slippery, it means that it is producing hydroxide ions (OH-) in water, which react with the skin to create a slippery sensation. So, a substance that feels slippery is a base.
Tastes sour: This is a property of acids. When a substance tastes sour, it means that it is producing hydrogen ions (H+) in water, which react with taste buds to create a sour taste. So, a substance that tastes sour is an acid.
Conducts electricity: Both acids and bases can conduct electricity, but it depends on whether they are in aqueous solution or molten form. In an aqueous solution, both acids and bases dissociate into ions and can conduct electricity. However, in the molten state, only bases can conduct electricity. Therefore, if a substance can conduct electricity in an aqueous solution or molten state, it can be either an acid or a base or both.
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Correct form of question would be
Identify the substance that each property describes.
only acid
only base
both acid and base
feels slippery
tastes sour
conducts electricity
In which way is primary succession similar to secondary succession?
Both occur where life already exists.
Both are gradual.
Both occur where no life exists.
Both involve creating soil
Primary succession and secondary succession are similar in that they are both gradual processes and involve the creation of soil.
What is Primary succession and secondary succession?
Primary succession occurs in an area where no soil or living organisms are present, such as on bare rock or after a volcanic eruption. Over time, pioneer species like lichens and mosses establish themselves, eventually leading to the growth of small plants, shrubs, and trees. As these organisms die and decompose, they create soil, which allows for the growth of larger and more complex organisms. This process can take hundreds or even thousands of years.
Secondary succession, on the other hand, occurs in an area where soil and some living organisms are already present, but the community has been disturbed or destroyed, such as after a forest fire, a landslide, or human activity like clear-cutting or farming. The process begins with the growth of fast-growing and weedy species that quickly colonize the area, followed by the establishment of more complex and longer-lived species. Secondary succession is generally faster than primary succession because soil and some organisms are already present.
Primary succession and secondary succession are similar in that they are both gradual processes and involve the creation of soil.
However, they differ in terms of the starting point of the succession. Primary succession begins on bare rock or soil that has never been colonized by living organisms, while secondary succession begins on soil that has previously supported life but has been disturbed, such as after a forest fire or clear-cutting.
Therefore, the statement "Both occur where no life exists" is only true for primary succession, while "Both occur where life already exists" is only true for secondary succession.
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Which of the following is false?
The orbits defined in the Bohr model of an atom for atoms in the first and second period. But, beyond those atoms, the model no longer is appropriate.
The dual nature of an electron prevents simultaneously knowing both the exact location and the velocity of the electron.
The Schrödinger equations take into account the dual nature of an electron to define regions in space where electrons have a high probability of being located.
The more precisely the location of an electron is known, the less precisely the velocity is known.
Answer:
B is the false one
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A 25. 00 mL sample of an aqueous solution of Ba(OH)2 requires 18. 45 mL of 0. 01500 M HCl (aq) for its neutralization. What is the molarity of the Ba(OH)2?
The molarity of the 25 mL Ba(OH)₂ solution required to neutralize 18.45 mL 0.01500 M HCl solution is 0.005535 M.
The balanced chemical equation for the reaction between Ba(OH)2 and HCl is:
Ba(OH)2 + 2HCl -> BaCl2 + 2H2O
The moles of HCl used can be calculated as:
moles of HCl = concentration of HCl x volume of HCl
moles of HCl = 0.01500 M x 0.01845 L
moles of HCl = 0.00027675 mol
Since the stoichiometry of the reaction is 1:2 between Ba(OH)2 and HCl, the moles of Ba(OH)2 can be calculated as:
moles of Ba(OH)2 = 0.00027675 mol / 2
moles of Ba(OH)2 = 0.000138375 mol
The molarity of Ba(OH)2 can be calculated as:
molarity of Ba(OH)2 = moles of Ba(OH)2 / volume of Ba(OH)2
molarity of Ba(OH)2 = 0.000138375 mol / 0.02500 L
molarity of Ba(OH)2 = 0.005535 M
Therefore, the molarity of Ba(OH)2 is 0.005535 M.
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Another student points out that Jasmine’s calculation relates only to the water. The student wonders if it is possible to determine the amount of energy in the sample of Cheetos.
Explain why you can answer part (A), even though the calculation in Question 4 related only to the water. In your explanation, refer to evidence from the experiment and appropriate chemical laws.
In Question 4, Jasmine calculated the amount of energy absorbed by the water when the burning Cheeto was placed in it. Although the calculation related only to the water, we can still determine the amount of energy released by the burning Cheeto. This is because of the Law of Conservation of Energy, which states that energy cannot be created or destroyed, only transferred or transformed from one form to another. In this case, the energy released by the burning Cheeto is transferred to the water, causing its temperature to increase.
Therefore, we can use the amount of energy absorbed by the water (calculated in Question 4) as a measure of the amount of energy released by the burning Cheeto. We can assume that the energy released by the Cheeto is equal to the energy absorbed by the water. This is known as the principle of calorimetry, which states that the heat lost by the object being studied is equal to the heat gained by the surrounding medium.
However, it is important to note that this assumption is only valid if all the energy released by the Cheeto is transferred to the water. In reality, some energy may be lost to the surroundings, such as through radiation or conduction. Therefore, the calculated value for the energy released by the Cheeto may be slightly lower than the actual value.
5. A scientist mixed two samples together: a white
solid that boils at about 800°C and a colorless gas
that boils at about 70°C. He analyzed the results and
found two ending substances. One of the ending
substances boils at 245°C. This ending substance is
made up of the repeating group of atoms shown
above. Which of the diagrams to the left shows the
repeating groups of atoms that make up the
samples the scientist mixed together?
The starting material can be shown by the image in image B
What is a chemical reaction?A chemical reaction is a process that involves the conversion of one or more substances (called reactants) into new substances (called products) through the breaking and forming of chemical bonds. In a chemical reaction, the original chemical properties of the reactants are changed, resulting in the formation of one or more new substances with different properties.
Chemical reactions can involve the combination of two or more substances to form a single product, the decomposition of a single substance into two or more products, or the exchange of atoms or groups of atoms between reactants to form new products.
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under what condition does calcuim react with water
Calcium Hydroxide is created when calcium combines with water, or Ca2+. Water plus Ca results in Ca(OH)2.
Due to the heat created by the reaction, the calcium begins to float.
What purposes serves calcuim?Although it additionally plays a critical role in haemostasis, assisting in muscular contraction, controlling regular heart rhythms, and maintaining normal neural activities, calcium is a substance that is most frequently linked to strong bones and teeth.
What adverse effects can calcium supplements cause?Little, if any, negative effects are brought on by calcium supplementation. Gas, constipation, and bloating are examples of adverse symptoms that might occasionally happen. The most constipating substance is typically calcium carbonate. Finding a calcium supplement that you tolerate the best may need you to test a few various brands or varieties.
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Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium
chloride solution, water and carbon dioxide. What is the percent yield of carbon dioxide
if 3. 65 g of the gas is collected when 10. 0 g marble reacts?
The percent yield of carbon dioxide if the 3.65 g of the gas is collected when the 10.0 g marble reacts is react with the HCl is 83 %.
The chemical reaction is as follows :
CaCO₃ (aq) + 2HCl (aq) ----> CaCl₂ (aq) + H₂O (l) + CO₂(g)
The mass of the CaCO₃ = 10 g
The molar mass of the CaCO₃ = 100.09 g/mol
The moles of the CaCO₃ = 10 / 100.09
The moles of the CaCO₃ = 0.0999 mol
The molar ratio of the carbon dioxide and the calcium carbonate = 1 : 1
The moles of the carbon dioxide = 0.0999 mol
The mass of the carbon dioxide = moles × molar mass
The mass of the carbon dioxide = 0.0999 × 44
The mass of the carbon dioxide = 4.40 g
The percent yield = ( actual yield / theoretical yield ) × 100 %
The percent yield = ( 3.65 / 4.40 ) × 100 %
The percent yield = 83 %
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Falling oil prices would significantly lower the cost of production for many goods. Producers of
plastic kayaks, for instance, would be able to produce larger quantities of their product given the
decrease in input costs. Which of the following illustrates how consumers respond to the price
incentive brought about by the subsequent increase in supply? (1 point)
O Falling prices lead consumers to purchase fewer kayaks.
O Falling prices lead consumers to purchase more kayaks.
O Rising prices lead consumers to purchase fewer kayaks.
O Rising prices lead consumers to purchase more kayaks.
M
4
18
A consumer is known as a person who purchases the product for his or her own need and uses that product. Here Falling prices lead consumers to purchase more kayaks. The correct option is B.
What is fall in price?The general decrease in the price of products as well as in the economy is defined as the fall in price. The falling prices occur for many reasons including supply and demand factors.
A decrease in demand and an increase in supply will cause a fall in equilibrium price, but the effect on equilibrium quantity cannot be determined.
Thus the correct option is B.
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SCIENCE QUESTION GRADE 7 PLEASE HELP ME WITH IT ANSWER #8 BUT IF YOU CAN ANSWER ALL OF THEM AT ONCE, ONLY TELL ME WHAT QUESTION YOU DID: THANK YOU VERY MUCH!!!!!!!!!!
The mechanism which is put forward by Darwin for the evolution is called the natural selection. It is also sometimes defined as the ecological selection.
What is natural selection?According to Darwin's theory of natural selection the individuals with adaptive traits, that is the traits which give them some advantage are more likely to survive and reproduce. These individuals then pass the adaptive traits to produce new offspring.
Darwin found two types of tortoise in the Galapagos island. The saddle back tortoises had shells that rise in front like a saddle. This adaptation makes them easier to live in area of low vegetation whereas Dome shaped tortoise lived in abundance of vegetation.
Similarly he noticed difference in the shape and size of beaks. Large billed finches feed on large seeds whereas small billed finches feed on soft seeds.
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How many grams are in 4.50x1023 molecules of CO2? [Molar mass CO2 = 44.01 g/mol CO2]
7.48x10-11 g CO2
32.9 g CO2
44.01 g CO2
6.16x1045 g CO2
The mass of 4.5 moles of CO2 is 7.48x10-11 g CO2 Option b)
What are 4 types of moles mass?The ratio between the mass and the quantity of material (measured in moles) of any sample of a chemical compound is known as the molar mass (M) in chemistry. The molar mass of a material is a bulk characteristic rather than a molecular one. The compound's molar mass is an average over many samples, which frequently have different masses because of elements.
A terrestrial average and a result of the relative frequency of the isotopes of the component elements on Earth, the molar mass is most frequently calculated from the standard atomic weights. For changing between a substance's mass and quantity in bulk amounts, the molar mass is the proper unit.
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