Frost forming on a car's windshield is a chemical change
True or false

Answers

Answer 1

Answer:

True

Explanation:

The reason why is because frost is a result of a chemical reaction

Answer 2
Chemical Change is also known as the Non Reversible Change. ... Reversible Change is defined as changes that can be reversible. For example, frost forming on the window is Physical. It is because when the temperature goes up, the frost can melt and when it freezes, it forms a frost again

Related Questions

At standard pressure, a sample of oxygen occupies 31 ml. What volume does the gas occupy when the pressure is 2 atm?

Answers

Answer:

I don't know

Explanation:

sorry I don't know

I need help with energy

Answers

Answer:

Explanation:

The correct answer is

energy resulting from the flow of charged particles , such as electrons or ions.

hope it helps :)

Which of the following BEST describes what DNA looks like?

Answers

Answer:

You didn't provide any options but from this, choose the answer in your options.

DNA has a double helix structure. It creates an extremely thin spiral that can not be seen to the naked human eye. It contains sugar and phosphate molecules. The spiral contains colored nitrogenous bases.

Freezing and thawing water can cause a rock to break down into smaller pieces. Which part of the rock cycle is this an example of?

melting
weathering
subsidence
deposition

Answers

Answer:

Deposition

Explanation:

It’s breaking down the rock :]

Answer:

deposition

Explanation:

Ap3x

Which of the following is a true statement about bacteria, based on what Tim and Moby explained??

A: Bacteria exist in only a few environments on Earth.
B: Bacteria can grow to extremely large sizes.
C: Mast bacteria are harmful to humans
D: Bacteria can be both harmful and helpful to humans.

Extra points for help

Answers

I believe it’s D

There is good and bad bacteria that can be both harmful and good for humans

Answer:

D: Bacteria can be both harmful and helpful to humans.

Explanation:

Hope this helps

True or False: The reactants and the products of a chemical equation always have the same number of atoms.

Answers

Answer: True

Explanation: It always has the same number because the both have or are using the same product.

Which of the following chemical reactions produces water via a
synthesis reaction?
a 2H2 + O2 + 2H2O
b NaOH + HCI - NaCl + H2O
C CuO + H2 - Cu + H2O
d H2CO3 → CO2 + H2O

Answers

Answer:

Should be A, but also I think there should be an arrow between O2 and 2H2O


True or false: All heterotrophs are omnivores.

Answers

Answer:

False. They can be both omnivores and carnivores.

Show work please ?...........

Answers

Answer:

NO

Explanation:

NO NO NO

i am way to much of an idiot for this (hope i made you laugh (and mad cuz i did not answer) :3)

If a metal that had reacted very
slowly with dilute acid was
tested with a concentrated
one, what would you predict
would happen?​

Answers

Answer:

It would react better than what with dilute and will furnish more hydrogen gas.

It would react faster due to the substances concentration percentage. The higher the concentration, the stronger it is, making it a quicker reaction with the metal.

Which of the following samples of baking soda wold react the fastest with
vinegar? *
1 point
powder
they all react at the same rate
O small crystal
small cube

Answers

The answer is powder because if it was a small crystal it the molecules are tightly compact same with the small cube but there less compact, powder is loose and more spread out and easier to mix so it would react the fastest

Would fire extinguishers that produce Carbon Dioxide (CO) gas be more effective in
fighting ground fires or ceiling fires? Explain.

Answers

Answer:

They would be more efficient in ground fires since carbon dioxide is much greater in mass then oxygen, so its affected by gravity .

Explanation:

I really like chemistry but no barely anything about it so could you tell me something about it please

Answers

Answer:

2 hydrogen atoms and one oxygen atoms make h2o/water

u could use khan academy to learn more ab it it’s basically like a free class

I need helps plss!!!!

Answers

Answer:

Copper = 2 Boron = 12 (copper and boron combined = 14)

Explanation:

the number after the element is the amount of atoms there is

A compound containing 5.93% H and 94.07% O has a molecular mass of 34.02 g/mol determine the empirical and Molecular formula Of this compound

Answers

Answer:

7% 4)2(10

Explanation:

beacouse if you divide it you can get the answer

Long ago, living things were divided into two main groups: _________

Answers

Answer:

I think the answer is Prokaryote and Eukaryote

Explanation:

Balance this equation. C(s)+H2(g) -> CH4(g)

Answers

C (s) + 2 H2 (g) = CH4 (g)

9. What does C12 (g) represents?
A. Chlorine ions
B. Chlorine liquid
C. Chlorine gas
D. Chlorine atom​

Answers

Answer:

chlorine gas since it exists as a diatomic molecule

Imagine the tarantula lost their fangs and the lion lost their sharp teeth. What do you think would happen?

Answers

they would not survive in a natural setting!

Answer:

I’d still be afraid of them :)) lol thx for the points. Hope you having a good day!

C7H6O3+ C4H6O3=C9H8O4+H20
- Balance the above equation.​

Answers

Answer:

2C7H6O3 + C4H6O3 - - - > 2C9H8O4 + H2O

Explanation:

Reactants:

2C7H6O3 + C4H6O3

C = 18

H = 18

O = 9

Products:

2C9H8O4 + H2O

C = 18

H = 18

O = 9

A compound consists of 3 moles of carbon and 4 moles of hydrogen. What is the empirical formula of this compound?
Group of answer choices

CH4

C3H3

C3H4

C4H3

Answers

Answer:thanks for the points

Explanation:

2. Hydrocarbons consist of carbon and hydrogen. 5.7 g of a hydrocarbon contains 4.8 g of carbon.
If the relative molecular mass of the hydrocarbon is 114, determine its molecular formula.​

Answers

Answer:

The molecular formula of the hydrocarbon compound is C₈H₁₈

Explanation:

The type of chemical substance in the question = Hydrocarbon

The mass of the hydrocarbon = 5.7 g

The mass of carbon in the given hydrocarbon (sample) = 4.8 g

The relative molecular mas of the hydrocarbon = 114 g

Therefore, the mass of hydrogen in the sample, H = 5.7 g - 4.8 g = 0.9 g

The ratio of the mass of carbon in the sample = 4.8/5.7

The ratio of the mass of hydrogen in the sample = 0.9/5.7

By the law of constant composition, we have;

The mass of carbon in a mole of the hydrocarbon = (4.8/5.7) × 114 g = 96 g

The molar mass of carbon, C = 12 g/mol

The number of moles of carbon in a mole of the hydrocarbon, 'n₁', is given as follows;

n₁ = 96 g/12 g = 8 moles

The mass of hydrogen in a mole of the hydrocarbon = (0.9/5.7) × 114 g = 18 g

The molar mass of hydrogen, H ≈ 1 g/mol

The number of moles of hydrogen in a mole of the hydrocarbon, 'n₂', is given as follows;

n₂ = 48 g/1 g = 18 moles

Therefore, in each each molecule of the compound, we have have 8 atoms of carbon, 'C', and 18 atoms of hydrogen, 'H'

Therefore, we get;

The molecular formula of the hydrocarbon compound is C₈H₁₈ which is the chemical formula for the hydrocarbon also known as octane

I feel sad when all the flowers

Answers

Answer:

find happy things to think about, stay strong xx

Answer:    sorry u feel sad. y u feel sad?

Explanation:

We can talk if u want..

word equation for Na2O+H2O → NaOH

Answers

Answer:

Sodium oxide + Water - - - > Sodium Hydroxide.

How many grams of silver nitrate are required to produce 3.00 g of silver phosphate?

Answers

Answer:

105.3

Explanation:

105.3 grams of sliver

what physical properties does radium have

Answers

Answer:

Radium is silvery, lustrous, soft, intensely radioactive. It readily oxidizes on exposure to air, turning from almost pure white to black. Radium is luminescent, corrodes in water to form radium hydroxide. Although is the heaviest member of the alkaline-earth group it is the most volatile..

What is the charge on an atom after it gains two electrons during the formation of a bond?
One negative charge
One positive charge
Two negative charges
Two positive charges

Answers

two negative charges because electrons have a negative charge

Which of the following could be an empirical formula? a C6H12O6 b H2O2 c CH2O d C6H6

Answers

Answer:

A C6H12O6 will be the empirical formulae.

I dont know i just want help thats why im answering to get 1 help as i have to help to get help

Please help! Is hot tea with lemon juice a heterogeneous, homogeneous, or pure substance? Will award brainliest!

Answers

Answer:

Homogeneous

Explanation:

Pure substances are untouched substances.

Homogeneous mixtures are in uniform.

Heterogeneous mixtures are un-uniform.

How can changing the reaction conditions influence the yield of a chemical reaction?
please explain in detail

Answers

I’m not sure if this is what you’re looking for, but if the environmental conditions change, it can be impacted. If it’s humid, for example, the reaction can be subdued and you can have a lower percent yield. (In this situation, a chemical not being stored too well could cause it to react a bit with some water in the air before the experiment)

Answer:

I found this on the web hope this helps.  

Explanation:

Le Châtelier's Principle states that a change in pressure, temperature, or concentration will push the equilibrium to one side of the chemical equation. So, if you manipulate the conditions to favor the product side, you increase the yield and vice versa.

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