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seraphim [82]
2 years ago
5

Which statements about this area are true based on what you know about petrified fossils? Check all that apply.

Chemistry
2 answers:
BigorU [14]2 years ago
6 0
The area was probably covered by water. I think
earnstyle [38]2 years ago
4 0
The area was once a forest.
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What is the mass of carbon dioxide formed when 36g of carbon is burnt?<br> C+O2 -------&gt;C02
Anestetic [448]

Answer:

Mass = 132 g

Explanation:

Given data:

Mass of CO₂ formed = ?

Mass of C burnt = 36 g

Solution:

Chemical equation:

C + O₂    →    CO₂

Number of moles of carbon:

Number of moles = mass/molar mass

Number of moles = 36 g/ 12 g/mol

Number of moles = 3 mol

now we will compare the moles of carbon and carbon dioxide.

                C           :        CO₂

                 1           :         1

                3           :         3

Mass of CO₂:

Mass = number of moles × molar mass

Mass = 3 mol × 44 g/mol

Mass = 132 g

7 0
3 years ago
Someone please help me i’m stuck
Daniel [21]
I thought about writing it for you but then i found this and thought i will give help but at the sometime allow you write the response you self

5 0
4 years ago
Which is a strong base? HCl NaOH NH3 H3CO3
STatiana [176]

Answer:

The answer is B: NaOH :3

Explanation:

Hope this helped :D

6 0
3 years ago
Acid rain can be destructive to both the natural environment and human-made structures. The equation below shows a reaction that
sleet_krkn [62]

Answer:

I would say the correct answer is <em><u>A 200.00 mol</u></em>

Explanation:

Hope this help

Have a nice day

8 0
3 years ago
She collected 20 cm³ of oxygen. What volume of hydrogen could she also have collected at the same time?
loris [4]

Answer:

Assuming it was collected from the atmosphere it would be virtually nothing

Explanation:

hydrogen makes up 0.000055% of the atmosphere while oxygen makes up 23 percent. 20/400000 cm^3 of hydrogen

7 0
3 years ago
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