1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
laiz [17]
3 years ago
7

Why are coal, oil, and natural gas called fossil fuels?

Chemistry
2 answers:
horrorfan [7]3 years ago
7 0
<span>Coal, oil and natural gas are are called fossil fuels because they are composed of the remains of organisms that lived as long as 500 million years ago. These organisms, such as phytoplankton, became incorporated into the bottom sediments and then were converted, with time, to oil and gas.</span>
sergeinik [125]3 years ago
6 0

Because that's where they come from.  Coal, oil, and natural gas are the products
of dead dinosaurs rotting in the ground under great pressure for millions of years. 


You might be interested in
A cubic centimeter is equal in volume to a _____.
mafiozo [28]
A cubic centimeter is equal in volume to one milliliter 
8 0
3 years ago
Read 2 more answers
If a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm?
Greeley [361]

Answer:

1.44 L

Explanation:

Since 25 is constant it is no use. Now, rearrange the gas formula. You should get...

P1V1/T2=P2V2T1

Next, rearrange to fit the problem. You should get...

V2=P1V1/P2

Fill in our values and solve. You should get 1.44 L

We can check this by knowing that P and V at constant T have an inverse relationship. Hence, this is correct.

- Hope that helps! Please let me know if you need further explanation.

8 0
3 years ago
The Germans were the first to send up a satellite into space.
vladimir2022 [97]

Answer: Thats false the Russians were the first

Explanation:

8 0
3 years ago
Read 2 more answers
If you have a 1500 g aluminum pot, how much heat energy is needed to raise its temperature by 100°C?
Nataly [62]

The heat energy required to raise the temperature of 1500 g of aluminium pot by 100°C is 135 kJ.

The heat energy required to raise the temperature of 1500 g of copper pot by 100 °C is 57.75 kJ.

Explanation:

The heat energy required to raise the temperature of any body can be obtained from the specific heat formula. As this formula states that the heat energy required to raise the temperature of the body is directly proportional to the product of mass of the body, specific heat capacity of the material and temperature change experienced by the material.

So in this problem, the mass of the aluminium is given as m = 1500 g, the specific heat of the aluminium is 0.900 J/g °C. Then as it is stated that the temperature is raised by 100 °C, so the pots are heat to increase by 100 °C from its initial temperature. This means the difference in temperature will be 100°C (ΔT = 100°C).

Then, the heat energy required to raise the temperature will be

q = m*c*del T = 1500 * 0.900 * 100 = 135000 = 135 kJ

Thus, the heat energy required to raise the temperature of 1500 g of aluminium pot by 100 °C is 135 kJ.

Similarly, the mass of copper pot is given as 1500 g, the specific heat capacity of copper is 0.385 and the difference in temperature is 100  °C.

Then, the heat energy required to raise its temperature will be

q = m*c*del T = 1500 * 0.385 * 100 = 57750 = 57.75 kJ

And the heat energy required to raise the temperature of 1500 g of copper pot by 100°C is 57.75 kJ.

So, the heat energy required to raise the temperature of 1500 g of aluminium pot by 100°C is 135 kJ. And the heat energy required to raise the temperature of 1500 g of copper pot by 100 °C is 57.75 kJ.

8 0
3 years ago
Maya prepared 0.50 liters of a solution by dissolving 2.0 moles of an unknown compound in water. What is the molarity of the sol
Elena-2011 [213]

Answer:

4 M

Explanation:

Molarity can be represented by the following ratio:

Molarity = moles / volume (L)

Since you have been given both the mass and volume, you can plug the values into the equation and solve for molarity.

Molarity = moles / volumes

Molarity = 2.0 moles / 0.50 L

Molarity = 4 M

6 0
1 year ago
Other questions:
  • What are four ways you can separate mixture?
    10·2 answers
  • Which of the following is a result of the specific heat differences between land and ocean
    14·1 answer
  • How many atoms in 134 moles of an element B?
    15·2 answers
  • In the early studies of chemistry, scientists used properties and changed to help identify compounds. this is still done today.
    14·1 answer
  • The Safe Drinking Water Act (SDWA) sets a limit for mercury-a toxin to the central nervous system-at 0.002 mg/L. Water suppliers
    8·1 answer
  • Potassium-40 has a half-life of 1.277 x 109 years. After 1.022 x 1010 years, how much potassium-40 will remain from a 500.3-g sa
    15·2 answers
  • You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the rea
    5·1 answer
  • 1. Describe the 3 rules that govern the building of an electron configuration. Provide an example that
    5·1 answer
  • Please help I will mark brainliest
    8·1 answer
  • Anyone know what the answer is?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!