What the .............

Answer:cars

Explanation:bc it uses oil

Cars and trucks, coal-fired power plants, airplanes, large industrial operations are the four things people use every day that directly or indirectly consume fossil fuels.

A fossil fuel is a hydrocarbon containing substance that is recovered and used as fuel that naturally forms in the Earth's crust from the remains of dead plants and animals. Fossil fuels include coal, oil, and natural gas.

A general name for non-renewable energy sources such crude oil, petroleum products, natural gas, derived gas, coal, coal products, and non-renewable wastes is "fossil fuel."

These fuels come from plants and animals that lived in the distant past of the earth's history, such as millions of years ago.

Therefore, fossil fuels can be burned to produce energy, operate engines, or offer direct heat.

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Answer:

it is A striations

Explanation:

..........

Answer:

Striation

Explanation:

Lemon is an acidic fruit with a pH ranging 2 to 3. The acid in lemons are citric acid which makes lemon tart, which is Vitamin C.

Answer:

A

Explanation:

A compound machine is a combination of two or more simple machines.

Answer:

1 (NH4)2SO4 + Ba(NO3)2 → NH4NO3 + BaSO4

2 (NH4)2SO4 + Ba(NO3)2 → Ba(SO4) + (NH4)(NO3)

Explanation:

Answer:

Answer:

Couldn't figure out how to edit the other one to attach the image, but here is it with the labels. Also put the same explanation down below so you don't have to go to the other if you wanted to look at it in conjunction with the image.

Explanation:

Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.

To raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is 5.434×10¹ kJ.

For a substance, it's specific heat capacity is the amount of energy required to raise the temperature of unit mass of that substance by 1°C.

If, specific heat capacity (c) = 4.18 J/ g°C

Mass of the substance (m) = 250.0 g

Change in temperature (ΔT) = 52°C

Energy (Q) = ?

Then mathematically the relation could be represented as

  c = [tex]\frac{Q}{ \ m \ (\Delta\ T )}[/tex]

Therefore,  [tex]Q = m\times c \times (\Delta\ T)[/tex]

                   [tex]Q = 250 \times 4.18 \times 52[/tex]

                   [tex]Q = 54,340 J\\Q = 5.434 \times 10^1 kJ[/tex]  

So, to raise the temperature of 250.0 g of mercury by 52°C with a specific heat capacity of 4.18 J/ g°C the heat required is  5.434×10¹ kJ.

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Answer:



Explanation:

Number 3 is D

Number 4 is B

Number 5 is B

I think

Answer:

Number 5 is b is the correct answer

Answer:

Student 2. Sugar dissolves the fastest in hot liquids, which means immediately stirring it in a hot liquid and THEN adding a colder one will yield the best results.

Explanation:

This is actually how I was always taught to make sweet tea.

Answer:

9.1 mol

Explanation:

The balanced chemical equation of the reaction is:

CO (g) + 2H2 (g) → CH3OH (l)

According to the above balanced equation, 2 moles of hydrogen gas (H2) are needed to produce 1 mole of methanol (CH3OH).

To convert 36.7 g of hydrogen gas to moles, we use the formula;

mole = mass/molar mass

Molar mass of H2 = 2.02g/mol

mole = 36.7/2.02

mole = 18.17mol

This means that if;

2 moles of H2 reacts to produce 1 mole of CH3OH

18.17mol of H2 will react to produce;

18.17 × 1 / 2

= 18.17/2

= 9.085

Approximately to 1 d.p = 9.1 mol of methanol (CH3OH).

Answer:

50 mL; 7

Explanation:

By looking at the graph, the boundary point where the solution turns from acidic to basic appears at approximately 50 mL.

Because this is a titration between a strong acid and strong base, the pH of the equivalence point is always 7 (aka neutral).  

Answer:

the air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

Answer:

so mucjsuat least amount of soduim is will be 25percent

Answer:

I think the answer is a

Explanation:

An atom loses mass when the atom experiences radioactive decay.

What is radioactive decay?

Radioactive decay is when the balance of protons and neutrons in the nucleus isn't quite right, so it emits particles and energy.

Radioactive decay is when the nucleus of an atom isn't stable - it could have too many protons that push each other apart, or too many neutrons, and it's just like a big lump of rock and can fall apart.

There are three kinds of radioactive decay, all named after Greek letters: alpha (α), beta (β) and gamma (γ).

Hence, option A is the correct answer.

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Explanation:

Given that,

The mass of the object, m = 5 kg

We need to find the maximum potential energy. When the height of the object is maximum it will have the maximum potential energy.

The attached figure shows that the maximum height is 25 m. The formula for the potential energy is given by :

[tex]P=mgh\\\\P=5\times 9.8\times 25\\\\P=1225\ J[/tex]

So, when the height is 25 m, the object will have the highest potential energy.

Answer:

I'm pretty sure its 1.96g

Answer:

the earth revolves around the sun as it rotates to cause day and night.

Explanation:

the rotation of the earth is what expose different areas to receive sunlight which causes daytime whilst, the other side is facing away which causes night time.

Answer:The Sun rotates around the Earth as it revolves to cause day and night. The Sun revolves around the Earth as it rotates to cause day and night.

Explanation:it just does

Complete question: Luisa likes to drink water from a plastic bottle. She knows the bottles were formed from synthetic polymers that were created in a chemical reaction. She also knows that synthetic materials can cause problems. Which statement explains the kind of problem that can develop from using synthetic materials such as plastics?

a) plastics have changed the way people use materials

b) plastics have made the lives of people easier

c) plastics have contributed to more pollution

d) plastics have made more work for people

Answer: The correct statement is plastics have contributed to more pollution. Option C.

Explanation:

Synthetic polymers are commonly called plastics. These are referred to as synthetic materials which can be softened by heat or pressure and then moulded into any desirable shape like the the plastic bottle Luisa drank from.

The raw materials for the manufacture of plastics are readily and cheaply available for the refinement of crude oil through series of chemical reactions. They are made by polymerization of monomers which are derived from petrochemicals.

Although they are used in producing materials used daily, it has contributed to more pollution over the years. POLLUTION is the release of chemicals or substances through man's activities, into the environment which causes harm to both man and the environment.

Plastics have contributed to more pollution because most plastics are non- biodegradable and cannot be broken down by microbial action into simple inorganic forms. Therefore, they cause severe land pollution problems since they are not easily disposable. Also is poses a major problem to the world supply of crude oil as it's limited. This is as a result of heavy dependence on crude oil which provides petrochemicals that is the bulk of the raw materials needed for making plastics.

Answer:

2.05moles

Explanation:

The balanced chemical equation in this question is as follows;

Sn + 2H2SO4 → SnSO4 + SO2 + 2H2O

Based on the above equation, 2 moles of H2SO4 reacted to produce 1 mole of SnSO4

However, the mass of SnSO4 produced is 219.65 grams. Using mole = mass/molar mass, we can find the number of moles of SnSO4 produced.

Molar mass of SnSO4 where Sn = 118.7, S = 32, O = 16

= 118.7 + 32 + 16(4)

= 150.7 + 64

= 214.7g/mol

mole = 219.65/214.7

mole = 1.023mol

Therefore, if 2 moles of H2SO4 reacted to produce 1 mole of SnSO4

1.023 mol of SnSO4 produced will cause: 1.023 × 2/1

= 2.046moles of H2SO4 to react.

Answer:

Because of their spaceeeee isss different

Answer:

c

Explanation:

Answer:

(-1,0)

Explanation:

Answer:

received energy from water

Answer:

The answer is B.units of molar mass are g/mol

Answer:

there is no "following". if you can attach an image for me, ill be glad to help.

Explanation:

have a good day,

~evita

Answer:

.11 mol

Explanation:

Convert mmHg to atms by dividing by 760. Then multiply 6.3 by the atms and divide by .08206*(273+28) to get mol