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Grace [21]
3 years ago
14

The layered structures made of calcium carbonate by precambrian cyanobacteria are called _____.

Chemistry
2 answers:
Valentin [98]3 years ago
7 0
<span>stromatolites I think
</span>
Misha Larkins [42]3 years ago
6 0

Im pretty sure its Trilobites man.

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29.2 grams of methane (carbon tetrahydride), CH4, is how
Elena-2011 [213]

Answer:

1.83moles

Explanation:

Given parameters:

Mass of methane given  = 29.2g

Unknown:

Number of moles = ?

Solution:

To find the number of moles in this mass of a compound;

     Number of moles  = \frac{mass}{molar mass}  

Molar mass of CH₄   = 12 + 4(1)  = 16g/mol

Now;

    Number of moles  = \frac{29.2}{16}   = 1.83moles

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This formula equation is unbalanced.
viktelen [127]

answer is: coefficient is 2.



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