Answer:
Translation: Air resistance is a force that is caused by air. The force acts in the opposite direction to an object moving through the air.
Data are characteristics or information, usually numerical, that are collected through observation. In a more technical sense, data are a set of values of qualitative or quantitative variables about one or more persons or objects, while a datum (singular of data) is a single value of a single variable.
a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.
what is 2100 ÷ 35399 pleasss help me
Answer:
0.0593237097
Explanation:
classify each change as physical or chemical. a balloon filled with hydrogen gas explodes upon contact with a spark. the liquid propane in a barbecue evaporates away because someone left the valve open. the liquid propane in a barbecue ignites upon contact with a spark. copper metal turns green on exposure to air and water.
Chemical: When a spark comes into touch with a hydrogen gas-filled balloon, the balloon explodes.
Because the user left the valve open, the liquid propane in a grill evaporates away, it is Physical.
Upon coming into touch with a spark, the liquid propane in a grill ignites. is Chemical
When copper metal is exposed to air and water, it turns green. it is chemical.
What is propane liquid?
Propane, also referred to as liquefied petroleum gas, or LPG, is a gas that is typically compressed and kept in liquid form. It is virtually odourless, harmless, and colourless; an identifying odour is added to make it detectable.
What is the shelf life of liquid propane?LPG has an infinite shelf life. The gas bottle itself is the only constraint. It might survive 20 years or longer if it is maintained and not allowed to corrode. Gas bottles normally need to be examined and refilled every 10 years, though you can use them for longer if it's safe to do so.learn more about liquid propane here
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The pressure on 2.50 L of gas is changed from 4.5 atm to 2.2 atm. What is the new volume of gas?
Answer:
5.11 LExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{2.5 \times 4.5}{2.2} = \frac{11.25}{2.2} \\ = 5.1136666...[/tex]
We have the final answer as
5.11 LHope this helps you
What is the mass number of a sulfur (S) atom that has 17 neutrons?
What general trend do you observe in the periodic table of the Atomic Radius?
Answer:
Atomic radius Increases in groups from top to bottom and decrease in period from left to right.
Explanation:
what is the chemical equation for this?
Answer:
J
Explanation:
Chlorine Gas is Cl2 so if it isnt on the left as that its wrong.
Then on the products see that Fe III means Fe is +3 charge so we have to have 3 Cl to balance it to 0 since each cl as -1 charge.
FInally check if the equation is balanced J is maybe H but its to blurry to tell
In which direction will the electrons be pulled in the bond between hydrogen and chlorine?
toward the chlorine atom
toward both atoms equally
sometimes toward chlorine and sometimes toward hydrogen
toward the hydrogen atom
Answer:
toward the hydrogen atom
Explanation:
Answer:
toward the chlorine atom.
Explanation:
took the quiz and got it correct :)
how many moles are in 3.4 x 10^23 molecules of carbon dioxide CO2
A student prepared this table to gather information about digestion. Digestion of Food Column A Column B Physical Changes Chemical Changes The results of which investigation would be entered in Column A of the table? A. How do mitochondria release the energy in food molecules? B. Which type of teeth are most important in crushing food? C. What chemicals in the stomach are most important in breaking down proteins? D How do substances released by the pancreas affect the rate of digestion?
Answer:
B. Which type of teeth are most important in crushing food?
Explanation:
According to the question physical changes ought to be entered into column A while chemical changes ought to be entered into column B.
The crushing of food is a physical change. It does not involve any chemical transformation of the food material.The other options involve some sort of chemical transformation taking place on the food material being digested.
ammonium phosphate is an important ingredient in many fertilizers. it can be made by reacting phosphoric acid with ammonia . what mass of ammonium phosphate is produced by the reaction of of phosphoric acid? round your answer to significant digits.
7.5 g of ammonium phosphate is produced by the reaction of 4.9 g phosphoric acid.
What is Stoichiometry ?Stoichiometry helps us use the balanced chemical equation to measures quantitative relationships and it is to calculate the amount of products and reactants that are given in a reaction.
How to find number of moles ?To find number of moles use this expression
Number of moles = [tex]\frac{\text{Given Mass}}{\text{Molar Mass}}[/tex]
Given
Mass of H₃PO₄ = 4.9 g
Molar Mass of H₃PO₄ = 97.99 g/mol
Now,
Number of moles of H₃PO₄ = [tex]\frac{4.9\ g}{97.99\ \text{g/mol}}[/tex]
= 0.05001 mol
Now write the balanced chemical equation
H₃PO₄ + 3NH₃ → (NH₄)₃ PO₄
Molar Mass of (NH₄)₃ PO₄ = 149.1 g/mol
Mass of (NH₄)₃ PO₄ = No. of moles × Molar Mass
= 0.05001 mol × 149.1 g/mol
≈ 7.5 g
Thus from the above conclusion we can say that 7.5 g of ammonium phosphate is produced by the reaction of 4.9 g phosphoric acid.
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Disclaimer: The given question is incomplete on the portal. Here is the complete question.
Question: Ammonium phosphate [(NH₄)₃ PO₄] is an important ingredient in many fertilizers. It can be made by reacting phosphoric acid (H₃PO₄) with ammonia (NH₃). What mass of ammonium phosphate is produced by the reaction of 4.9 g phosphoric acid? Round your answer to significant digits.
3. Which term is defined as "anything that has mass and occuples space"?
Answer:
matter
Explanation:
All physical 'stuff'
Answer:
matter
Explanation:
Matter is anything that has mass and occupies space .
In addition to having a blue color what other characteristic do Neptune and Uranus share??
no rings
27 moons
no axis tilt
cold temperatures. HELP ASP
Answer:
d
Explanation:
it just makes sense
Answer:
Cold temperatures!
Explanation:
Both planets are very far from the sun, now to explain how the other answers would fit or just dont make sense, No rings, the answer isn't the best fitting answer for this question, 27 moons, this is wrong because neptune has 14 moons, only uranus has 27. No axis tilt, this answer is wrong because both planets have an axis.
Compounds are made up of different kinds of atoms that are chemically combined. What do compounds have in common? A. They have the same color. B. They have the same melting point. C. They can be broken down into simpler substances. D. They cannot combine with one another to form more complex substances.
Answer:
D
Explanation:
They cannot combine with one another to form more complex substances. that's the answer
The compounds have in common is they cannot combine with one another to form more complex substances. The correct option is D.
What are compounds?Compounds are the substances made up of numerous similar molecules made up of atoms from different elements and kept together by chemical bonds. Therefore, a molecule made up of only one type of atom is not a compound.
There are different types of compounds that are made by combining of different substances. Like, ionic compounds are made by combining metals and non-metals.
Compounds are the substance that can into form further complex substance by combining with another substance because they are already made up of two or more substance.
Thus, the correct option is D. They cannot combine with one another to form more complex substances.
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In testing for the presence of lead 2+ ions in solution, a student addes a
solution of sodium nitrate. What will be the conclusion of the test if no
precipitate forms? *
Calculate the molar mass of a gas with a mass of 3.15 g, a pressure of 785 mmHg, and a temperature of 20 Celsius. The gas has a volume of 750 ml.
Answer:
Molar mass = 105 g/mol
Explanation:
Given data:
Mass of gas = 3.15 g
Pressure = 785 mmHg
Temperature = 20°C
Volume of gas = 750 mL
Molar mass of gas = ?
Solution:
Pressure = 785 mmHg (785/760 = 1 atm)
Temperature = 20°C (20+273 = 293 K)
Volume of gas = 750 mL (750 mL× 1 L/1000 mL = 0.75 L)
PV = nRT
R = general gas constant (0.0821 atm.L/mol.K)
1 atm× 0.75 L = n×0.0821 atm.L/mol.K × 293 K)
0.75 atm.L = n× 24.06 atm.L/mol
n = 0.75 atm.L / 24.06 atm.L/mol
n = 0.03 mol
Molar mass of gas:
Molar mass = Mass / number of moles
Molar mass = 3.15 g/ 0.03 mol
Molar mass = 105 g/mol
14. Which of the following is produced when propane (C3H8) is combusted completely? (2 points)
H20
СО
O2
H2
The following is produced when propane (C₃H₈) is combusted completely : H₂O
Further explanationComplete combustion of Hydrocarbons with Oxygen will be obtained by CO₂ and H₂O compounds.
If O₂ is insufficient there will be incomplete combustion produced by CO and H and O
Hydrocarbon combustion reactions (especially alkanes) [tex]\large {\boxed {\bold {C_nH _ (_2_n _ + _ 2_) + \frac {3n + 1} {2} O_2 \Rightarrow nCO_2 + (n + 1) H_2O}}}[/tex]
For combustion of propane C₃H₈ (n = 3) ⇒ completely(excess O₂) :
C₃H₈+5O₂⇒3CO₂+4H₂O
The products of combustion : CO₂ and H₂O
is it true that Einstein's equation E=mc2 states that matter can be converted to energy. This is an exception to the Law of Conservation of Mass.
The famous formula E=mc^2 really says that mass and energy are the same thing, but measured in different units. So the separate laws of conservation- one for mass and the other for energy- are now merged into one law.
Einstein's theory of special relativity (1905) shows that matter (as mass) and energy can be converted into each other according to the famous equation E = mc2, where E is energy, m is mass, and c is the speed of light.
Hope It helps you.
Calcium carbonate forms limestone, one of the most common rocks on Earth. It also forms stalactites, stalagmites, and many other types of formations found in caves. When calcium carbonate (CaCO3) is heated, it decomposes to form solid calcium oxide and carbon dioxide gas. Write the balanced equation and calculate how many liters of carbon dioxide will be produced at STP if 2.38 g of calcium carbonate reacts completely?
Answer: [tex]CaCO_3(s)\rightarrow CaO(s)+CO_2(g)[/tex] , 0.533 L
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
[tex]CaCO_3(s)\rightarrow CaO(s)+CO_2(g)[/tex]
According to avogadro's law, 1 mole of every substance occupies 22.4 L of volume at STP.
Number of moles =[tex]\frac{\text {given mass}}{\text {Molar mass}}[/tex]
moles of calcium carbonate = [tex]\frac{2.38g}{100g/mol}=0.0238mol[/tex]
As 1 mole of calcium carbonate produces = 22.4 L of carbon dioxide at STP
Thus 0.0238 moles of calcium carbonate produces =[tex]\frac{22.4 L}{1}\times 0.0238=0.533L[/tex] of carbon dioxide at STP
The balanced equation is [tex]CaCO_3(s) \rightarrow CaO(s) + CO_2(g)[/tex]
The number of liters of carbon dioxide that should be produced is 0.533L
Law of conversation of mass:As per this law, the mass could neither be developed nor be destroyed. So, the mass of products should be equivalent to the mass of reactants. The number of atoms of every element has to be the similar on reactant and product sides. Due to this, the chemical equations are balanced.
[tex]CaCO_3(s) \rightarrow CaO(s) + CO_2(g)[/tex]
Avogadro's law:As per this law, 1 mole of every substance occupies 22.4 L of volume at STP.
So,
We know that
Number of moles = [tex]given\ mass \div molar\ mass[/tex]
Now the moles of calcium carbonate is [tex]= 2.38 \div 100[/tex] = 0.0238 mol
Since 1 mole of calcium carbonate generated = 22.4 L of carbon dioxide at STP
So, 0.0238 moles of calcium carbonate generated
[tex]= 22.4 \div 1 \times 0.0238 \\\\= 0.533L[/tex]
of carbon dioxide at STP
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7. DNA is essential to living organisms because it O is a spiral helix can prevent disease O carries the genetic code O can break apart
Answer: DNA is essential...because it carries the genetic code.
Explanation:
Although the other statements are true about DNA, it's a spiral helix and can break apart, its main function is that it contains the genetic code for organisms.
Anything helps thank you
PLEASE ANSWER “Tessa uses a toy slingshot to launch a tennis ball across the park for her dog to fetch. For her first launch, she
uses 100 N of force. Her second launch uses 200 N of force, and her third launch uses 300 N. Which launch had
the greatest acceleration of the tennis ball?”
The third launch ( with 300 N force) had the greatest acceleration of the tennis ball
Further explanationNewton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object
∑F = m. a
[tex]\large{\boxed{\bold{a=\frac{\sum F}{m}}}[/tex]
F = force, N
m = mass = kg
a = acceleration due to gravity, m / s²
From the above equation it has been shown that the force acting on the object is directly proportional to its acceleration, so the greater the force exerted on the object, the greater the acceleration of the object produced.
An object's velocity can be described by its acceleration and direction.
True
False
Answer:
False
Explanation:
An object's velocity can be described by it's direction. Because velocity is a vector. Besides velocity and acceleration are different units they can't be described by each other.
A solution of silver chloride reacts with aqueous sodium sulfate to produce a precipitate and a solution.
When balanced, the coefficients for this chemical reaction, is?
Answer:
<br> a) Barium chloride and sodium sulphate aqueous solutions react to give insoluble barium sulphate and aqueous solution of sodium chloride.
the first plants to grow after a fire are called?
Answer:
Ephemerals
Explanation:
The first plants to move into the new bare ground after a wildfire are wildflowers or “weeds.” These fast-germinating, leafy herbaceous plants are also known as “forbs” or “ephemerals.” They quickly germinate, grow and produce a new crop of seeds.
Answer:
ephemeral
Explanation:
A solution is classified as a weak base. Which of these could be the pH of the solution?
A)2
B)6
C)10
D)13
A solution that is classified as a weak base will have a pH of:
C)10
This can be find out y looking at the pH value see below.
What is pH?A solution can be identified in terms of acidity, basicity,and neutrality by known the pH of the solution.
If pH is below 7 than the solution is acidic.
If pH is above 7 than the solution is basic.
If the pH is 7, then the solution is neutral.
A strong base will have a pH in between 11-14.
A weak base will have a pH between 8-10.
Thus, option C is correct.
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A student wants to find out if drinking coffee will affect the amount of sleep she has everyday. she collected data of cups of coffee that she drank to how many hours of sleep she got everyday. what would you plot on the x-axis?
We plot the cups of coffee drink on the X-axis, whereas hours of sleep are plotted on the Y-axis.
plotting graphs relationship between various sets of variables with respect to one another. the main use of a graph is it helps us to present data which are complex to describe in the text.Since in the problem it is given that, the student wants to record the hours of sleep which are affected by the number of cups of coffee consumed by her or him, therefore we will plot the number of cups of coffee on the X-axis and the number of hours of sleep will be plotted in Y-axis .
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How many phosphorus atoms are in two moles of the compound Mg3(PO4)2? O 4 atoms O 1.2 x 1023 O 2 atoms O 2.4 x 1023
The number of phosphorus atoms : 2.408 x 10²⁴
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
moles of Mg₃(PO₄)₂ = 2
moles of phosphorous(P) atoms in Mg₃(PO₄)₂ ⇒ mol ratio of elements in the compound(for P=2)
[tex]\tt 2\times 2=4[/tex]
The number of atoms of phosphorous(P) :
[tex]\tt 4\times 6.02\times 10^{23}=2.408\times 10^{24}[/tex]
If you have 250 mL of 0.75 M LINO2.
How many grams of this substance
would you have?
Mass of this substance = 9.928 g
Further explanationMolarity is a way to express the concentration of the solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
Where
M = Molarity
n = Number of moles of solute
V = Volume of solution
So to find the number of moles can be expressed as
[tex]\boxed{\bold{n=V\times M}}[/tex]
mol of substance -Lithium nitrite - LiNO₂ :
V = 250 ml = 0.25 L
M = 0.75 M
[tex]\tt n=0.25\times 0.75=0.1875[/tex]
So mass of this substance - LiNO₂ (MW=52,947 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=0.1875\times 52,947 g/mol\\\\mass=9.928~g[/tex]
All atoms try to achieve---------------(minimum energy,stable energy,maximum energy,covalent energy)
Answer:
minimum energy
Explanation:
minimum energy means maximum stability
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PLEASE answer this Quick!! I have to submit this in a HOUR!!!!! -
Describe the relationship between the state of matter of water (gas, liquid, solid) and the motion of the water molecules
I Will give 30 POINTS!!
Answer:
Solid turns to liquid and liquid to gas
Explanation:
ice cube to water, water to carbon