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:
What explanation from the evidence within the chemical equation BEST supports the idea that matter is conserved in a chemical reaction? A There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products. B There are the same number of elements in the reactants as there are in the products. C More reactants, hydrogen and oxygen, were added to make the product, water. D Two reactants, hydrogen and oxygen, combined to make one product, water.
Answer:
A There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.
Explanation:
Matter is conserved in a chemical equation if there are no loss of atoms. That means, total number of atoms of elements must be the same as the total number of element on the product side. The correct option is;
A. There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.
Answer:
its A. i just did dat
. For the reaction 2HNO3 + Mg(OH), → Mg(NO3)2 + 2H20, how many grams of magnesium nitrate are produced from 8.00 mol of nitric acid, HNO,?
Mass of Magnesium nitrate produced : 593.2 g
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
2HNO₃ + Mg(OH)₂ → Mg(NO₃)₂ + 2H₂0
mol HNO₃ = 8
From the equation, mol ratio of HNO₃ : Mg(NO₃)₂ = 2 : 1, so mol Mg(NO₃)₂ :
[tex]\tt \dfrac{1}{2}\times 8=4~moles[/tex]
Mass Mg(NO₃)₂(MW=148,3 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=4\times 148,3 g/mol\\\\mass=593.2~g[/tex]
Elements eventually combine to make compounds, which statement is true
about compounds?
a) The compound formed is different both physically and chemically
compared to the elements that formed it
b) Compounds require lots of energy to be formed and to be separated
c) Compounds are easy to identify by their chemical formula ex. C6H12O6
d) All of the above
The statement that is true about compounds is that
the compound formed is different both physically and chemically compared to the elements that formed it, Compounds require lots of energy to be formed and to be separated and Compounds are easy to identify by their chemical formula. That is option D.
What are chemical compounds?Chemical compounds are chemical substances that are made up of elements which are chemically combined together.
The combination of these elements leads to the formation of new chemical bonds making the newly formed chemical compounds different from the elements that formed it.
During the formation of these chemical compounds, bonds are being broken while other bonds are being formed to make a different chemical compounds.
The energy that is always required to breaks the chemical bond is called the bond energy.
To be able to identify a chemical compound, a chemical formula is being used for example, C6H12O6 is the chemical formula for glucose chemical compound.
Therefore, the statement that is correct concerning a chemical compound include the following:
The compound formed is different both physically and chemically compared to the elements that formed it.Compounds require lots of energy to be formed and to be separated. Compounds are easy to identify by their chemical formula.Learn more about elements here:
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5) In two paragraphs, explain your own personal views on how you and humans as a whole are connected to the environment. Be sure to explain how you think your culture, family, or upbringing has played a part in the development of these views
please help me
The environment is indispensable in the molding of humans from pre historic times.
How are we connected to the environment?The term environment has to do with the surroundings of man. It is the area that surrounds man. Man is shaped by his environment because it has a profound influence on how man reasons and behaves.
In Psychology, the nature - nurture controversy has been a big subject of debate. This theory holds that the environment in which a person was born has a profound influence on the attitudes and perceptions of the individual.
This has held true in so many instances for instance, the faiths that we profess for most of our lives is the result of the religious upbringing that we received in the earlier years of life.
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If a sample of ammonia contains 19.0 g of H, how many grams of N does it contain? Express your answer in grams of nitrogen to two significant figures.
Please help me. Thank you
The mass of the nitrogen atoms in ammonia is 6.33 g.
How many moles of nitrogen are present?We know that ammonia is made up of nitrogen and hydrogen and hydrogen. There is one mole of nitrogen and three moles of hydrogen in a mole of ammonia.
Since the ratio of the atoms of hydrogen to nitrogen is 3:1, the ratio of the masses of the atoms is; 1/3 = x/19
x = 6.33 g
The mass of the nitrogen atoms in ammonia is 6.33 g.
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According to Newton's Second Law of Motion, if the force acting on ar
object stays the same, but the mass of an object increases, then
acceleration will...
A. increase
B. decrease
C. remain the same
D. completely stop
Answer:
B
Explanation:
Because the mass of an object increases, then the acceleration will decrease
for a theoretical yield of 22 g and actual yield of 13 g, calculate the percent yield for a chemical reaction
Answer:
59.09%
Explanation:
13/22*100=59.09%
linalyl acetate (bergamot oil): C , 73.41 % ; H , 10.29 % ; O , 16.30 %
Express your answer as a chemical formula.
Empirical formula tells us the relative ratios of different atoms in a compound.
The chemical formula for a compound obtained by composition analysis is always the empirical formula.
How to calculate Empirical formula:
First, try to write the details, like in a tabular formThen, write the given percentage of the elements under themDivide the given % with the atomic mass of the respective elementsAfter getting the values, divide those values with the least value from among them to get a simplest whole numberLinalyl acetate (bergamot oil):
Carbon Hydrogen Oxygen
73.41 % 10.29 % 16.30 %
73.41 / 12 10.29 / 1 16.30 / 16
6.11 10.29 1.01
6.11 / 1.01 10.29 / 1.01 1.01 / 1.01
6 10 1
Empirical formula : C₆H₁₀O
Thus we can conclude that empirical formula of linalyl acetate is C₆H₁₀O
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The empirical formula for Linalyl acetate expresses the relative proportions of different atoms in a compound.
What exactly is Linalyl acetate?Linalyl acetate is a phytochemical found in a variety of flowers and spice plants. It is an important component of bergamot and lavender essential oils. It is the linalool acetate ester, and the two are frequently found together.
Linalyl acetate, the primary constituent of lavender oil, is a fragrance chemical commonly found in scented products.Linalyl acetate has very low acute toxicity in mammals; the acute oral LD50 exceeds 13,360 mg/kg, and the inhalation LC50 exceeds 2740 mg/m3. Linalyl acetate causes no or very little irritation in humans. There is no information available about possible eye irritation.Linalyl acetate occurs naturally in organisms such as Xylopia aromatic, Citrus tankan, and others for which data is available.Linalyl acetate is safe as a fragrance material at current concentrations.A food additive is used to improve the flavor or odor of food.A substance that kills or slows the growth of microorganisms like bacteria, viruses, fungi, and protozoans.Hence, the empirical formula describes the relative proportions of different atoms in a compound. The chemical formula for a compound obtained through composition analysis is always the empirical formula.
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I WILL GIVE BRANLIEST IF CORRECT!!!!
Answer:
Uranium producess thorium and alpha particle
Explanation:
An object has a momentum of 5 kg m/s and a mass of 2 kg. How fast is it moving?
Answer:
2.5 meter per second
Explanation:
momentum = mass multiplied by velocity
please mark me brainliest
consider the following balanced equation: a(g) 5b(g) → 3c(g) 4d(s) when equal masses of a and b are reacted, which is limiting?
B is the limiting reactant in this equation.
What is the limiting reactant?The limiting reactant is the reactant that is present in the smallest amount in the system. The continuity of the reaction depends on the concentration of the limiting reactant.
It must also be said that the reactant that yields the least amount of product is the limiting reactant. We know that; A(g) + 5B(g) -----> 3C(g) + 4D(g).
We can see that;
1 mole of A gives 3 moles of C
5 moles of B gives 3 moles of C
1 mole of B gives 3/5 moles of C
Thus, B is the limiting reactant in this equation.
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How are the crust and the inner core ALIKE?
A) They are both solid
B) They both have the same temperature
C) They are both under the same pressure
D) They are both very close to the center of the earth
Answer:
A) They are both solid.
Morant Bay is 33 km south of Port Antonio a pigeon can fly at a speed of 1.2 m s what is the displacement of morant bay from Port Antonio
Answer:
33km due south
Explanation:
Morant Bay is 33km south of Port Antonio;
Problem: displacement of Morant bay from Port Antonio;
Displacement is a vector quantity. It is the length of path between two position and the direction inclusive.
So, it has magnitude and must be specified with a direction.
Therefore, the displacement of Morant Bay from Port Antonio is 33km due south.determine the number of protons neutrons and electrons in 3216s2
Answer:
Number of protons = 16
Number of neutrons = 16
Number of electrons = 18
Explanation:
The atom given is (32,16)S_2.
This simply Sulphur atom.
What (32,16)S_2 implies is that;
Atomic number = 16
Mass number = 32
Now atomic number means number of protons present in the atom
While mass number means number of sum of protons and neutrons present in the atom
Thus;
Number of protons = 16
Number of neutrons = 32 - 16 = 16
Now, for a neutral atom, number of protons is equal to number of electrons.
However, in this case it's not neutral but has a charge of -2.
Thus,
Number of electrons = 16 + 2 = 18 electrons
why do chemical equations have to be balanced ?
Answer:
Law of conservation of matter
Explanation:
"matter is neither created nor destroyed."
Answer:
I think that should help....
Using the geologic concept of plate boundaries, compare and contrast the formation of the Andes Mountains,
Himalayan Mountains, the islands of Japan, Iceland, and the San Andreas area of California. Compare ( how are they alike) and Compare (how are they different)
Answer:
Oo Japan. I love japan it’s so pretty and I wish I could go there, it’s my dream place to visit!
Explanation:
If you have 30 grams of oxygen, how many atoms are present?
Answer:
1 × 10²⁴ atoms O
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
30 g O
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of O - 16.00 g/mol
Step 3: Convert
[tex]30 \ g \ O(\frac{1 \ mol \ O}{16.00 \ g \ O} )(\frac{6.022 \cdot 10^{23} \ atoms \ O}{1 \ mol \ O} )[/tex] = 1.12913 × 10²⁴ atoms O
Step 4: Check
We are given 1 sig fig. Follow sig fig rules and round.
1.12913 × 10²⁴ atoms O ≈ 1 × 10²⁴ atoms O
which type of intermolecular force in water creates the surface tension that allows the stones to skip across the top of the water
Answer:
Hydrogen bonding
Explanation:
Water is a compound found readily in nature. It is made up of interatomic forces of covalent bonds that connects the hydrogen and oxygen bonds together in a definite ratio.
The intermolecular forces are responsible for the physical properties of substances. These forces allows a compound to behave in certain ways. In water, the intermolecular bonding present are the very strong hydrogen bonds. For this bond type, the hydrogen of one water molecule is firmly attached to the oxygen of another water molecule. The bonds are very strong forces.HURRY ! Kumar is producing the photoelectric effect by using red light. He wants to increase the energy of emitted electrons. Based on the research of Albert Einstein, what is the best way for him to do this? Increase the intensity of red light. Decrease the intensity of red light. Use a different colored light that has a higher frequency. Use a different colored light that has a lower frequency.
Answer:
using a diffrent colored light with a higher frequency
Explanation:
A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 atm. What is the new temperature of the gas? Use StartFraction P subscript 1 over T subscript 1 EndFraction equals StartFraction P subscript 2 over T subscript 2 EndFraction.. –44.2°C 32.6°C 115°C 388°C
Answer:
Answer is c....115°C
Explanation:
Gay-Lussacs law says that pressure of a gas is the same as temperature when the volume is kept the same
P / T = k
where P - pressure , T - temperature in kelvin and k - constant
parameters for the first time are on the left side of the equation and parameters for the second instance are on the right side of the equation
T1 - 25 °C + 273 = 298 K
substiuting the values in the equation
T2 = 388 K
temperature in celcius - 388 K - 273 = 115 °C
Based on the calculations, the new temperature of this ideal gas at constant volume is equal to: C. 115°C.
Given the following data:
Initial temperature = 25°C to K = 273 + 25 = 298 K.Final pressure = 1.25 atm.Initial pressure = 0.96 atm.How to determine the new temperature?In order to calculate the new temperature of this ideal gas at constant volume, we would apply Gay Lussac's law.
Mathematically, Gay Lussac's law is given by this formula;
P α T
P = kT
Where:
P is the pressure.T is the temperature.k is the constant of proportionality.Substituting the given parameters into the formula, we have;
[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2} \\\\\frac{0.96}{298} =\frac{1.25}{T_2} \\\\0.96T_2 =372.5[/tex]
T₂ = 372.5/0.96
New temperature = 388.0 K.
Conversion:
°C = K - 273
°C = 388.0 - 273
New temperature = 115°C.
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The element represented by [Xe]6s' is
Answer: is Cesium (Cs)
What are (at least) six common pollutants that are measured to determine an AQI score?
SOMEONE PLS HELP ME IVE BEEN WAITING FOR 3 DAYS FOR AN ANSWER THIS IS THE ONLY THING HOLDING ME BACK FROM SUBMITTING MY MOM IS GONNA KILL ME PLS THIS IS MY SECOND TIME ASKING PLS HELP ME
6CO2 + 6H2O —> C6H12O6 + 6O2
If 12 moles of oxygen were produced, how many moles of carbon dioxide were used?
I'll give you guys brainliest just help, please
Answer:
12 number of moles of carbon dioxide are used.
Explanation:
Given data:
Number of moles of oxygen produced = 12 mol
Number of moles of CO₂ used = ?
Solution:
Chemical equation:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Now we will compare the moles of oxygen with carbon dioxide.
O₂ : CO₂
6 : 6
12 : 12
Thus, 12 number of moles of carbon dioxide are used.
when liquid water changes into solid ice, it increases in ?
when liquid water changes into solid ice, it increases in mass
State 3 differences between a solution, suspension and colloid.
Explanation:
solution 1) homogeneous
2) do not scatter light
3) cannot be separated by filtration
Colloids 1) heterogeneous
2) scatter light
3) cannot be separated by filtration
suspension 1) heterogeneous
2) may either scatter light or be opaque
3) can be separated by filtration
when a person wearing perfume enters the room it takes several minutes to reach at the back of the room explain
Perfume molecules are in constant random motion
When a person wearing perfume enters the room it takes several minute for a smell to reach at the back of the room because the perfume molecules are in constant random motion they bump into each other causing some molecules to be occasionally sent hurtling out of the mass the perfume is sprayed in corner of a room, it will be smelt soon after in the opposite corner and also the process called as diffusion means it travel the area of high concentration to low concentration that's why perfume molecules are in constant random motion that's why it take several minutes to reach at the back of the room
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I have two beakers (A & B) containing clear liquids. The first one (A) holds 75g and after being analyzed proves to contain 4.425g of hydrogen and 70.575g of oxygen. The second beaker (B) holds 125g and analysis shows that it is composed of 7.38g of hydrogen and 117.6g of oxygen.
Answer:
The solutions are most likely hydrogen peroxide since it is the compound of hydrogen and oxygen that has a ratio of Hydrogen to Oxygen ratio of 1 : 1.
Note:The question is not complete.
Explanation:
The empirical formula of the two compounds are determined
Solution in beaker A:
Mass of Hydrogen = 4.425 g
Moles of hydrogen = reacting mass/molar mass = 4.425 g / 1 g/mol = 4.425 moles
Mass of oxygen = 70.575 g
Moles of oxygen = reacting mass/molar mass = 70.575 g / 16 g/mol= 4.411 moles
Mole ratio of Hydrogen to Oxygen = 4.425 : 4.411
Simplest mole ratio = 1 : 1
Therefore, empirical formula of solution in A = H₁O₁
Solution in beaker B:
Mass of Hydrogen = 7.38 g
Moles of hydrogen = reacting mass/molar mass = 7.38 g / 1 g/mol = 7.38 moles
Mass of oxygen = 117.6 g
Moles of oxygen = reacting mass/molar mass = 117.6 g / 16 g/mol= 7.35 moles
Mole ratio of Hydrogen to Oxygen = 7.38 : 7.35
Simplest mole ratio = 1 : 1
Therefore, empirical formula of solution in B = H₁O₁
The solutions in beakers A and B have the same empirical formula. Their molecular masses are not given, so their molecular formula is not certain. However, the solutions are most likely hydrogen peroxide since it is the compound of hydrogen and oxygen that has a ratio of Hydrogen to Oxygen ratio of 1 : 1.
What are the units for the mass of aluminum sulfide
The units for the mass of aluminium sulphide is g/mol.
What is aluminium sulphide?Aluminium sulphide is a chemical compound with the formula Al2S3 and has the mass of 150.158 g/mol.
What are units?A unit is a standard that are used for making comparisons in measurements.
Unit conversions allow for measurements of a property that have been recorded using different units like centimetres to inches.
Hence, the units for the mass of aluminium sulphide is g/mol.
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gypsum.
a.
The sedimentary rock formed when water deposits tiny particles of clay in very thin, flat layers is called
gypsum.
b. shale.
limestone.
d. calcite.
C.
Answer:
b shale
Explanation:
Question 23 (4 points)
Which of the following is NOT a characteristic for sexual reproduction? (4 points)
оа
Oь
Ос
Od
Uses a sperm and an egg cell
Having non-identical offspring
Having 1 parent
Reproducing slowly