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ch4aika [34]
3 years ago
7

Fossil fuels are made up of organisms that died millions of years ago. Which best describes this source of energy

Chemistry
1 answer:
Alenkinab [10]3 years ago
5 0
Nonrenewable
hope this helps
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How many moles of iron are in 50.0g of iron? How many iron atoms are in 59.0g of iron?
Julli [10]

Answer:

50.0 \div 59.0 = 10

right

7 0
2 years ago
In the reaction
NemiM [27]

Answer:

3 moles of CO are needed

Explanation:

Given data:

Number of moles of CO used = ?

Mass of Fe produced = 112 g

Solution:

Chemical equation:

Fe₂O₃ + 3CO      →        2Fe + 3CO₂

Number of moles of Fe:

Number of moles = mass/ molar mass

Number of moles = 112 g/ 55.85 g/mol

Number of moles = 2.00 mol

Now we will compare the moles of iron and CO.

                   Fe        :         CO

                   2          :         3

Thus, 3 moles of CO are needed.

6 0
2 years ago
Explain the Flow of Energy in Photosynthesis: Where does the Energy come from initially? What is it called? What type of energy
madam [21]

Answer:

The flow of photsynthesis comes from the sun

Explanation:

in which the plant absorbs. The plant then turns it into a type of food like glucose, protein, vitamin c etc. the plant uses this energy to help it grow!

Hoped this helped :)

7 0
3 years ago
Read 2 more answers
Please help!!!Which statement accurately describes relationship between weight and mass? If the picture is black just don’t answ
Mars2501 [29]

Answer:

A

Explanation:

Mass is a raw measurement, weight is effected by gravity

3 0
3 years ago
Read 2 more answers
The density of liquid mercury is 13.69 g/cm^3. How many atoms of mercury are in a 15.0 cm^3 sample? Use "E" for "x10" and use si
balu736 [363]
The formula is  m = D x V
D = <span>13.69 g/cm^3.
</span>V = <span>15.0 cm^3 
the mass of the liquid mercury is m= </span>13.69 g/cm^3 x 15.0 cm^3 = 195g
the molar mass of Hg is 200,
1 mole of Hg = 200g Hg, so #mole of Hg= 195 / 200 = 0.97 mol
but we know that
 1 mole  = 6.022 E23 atoms
0.97 mole=?

6.022 E23 atoms x 0.97 / 1 mole = 5.84 E23 atoms
6 0
3 years ago
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