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worty [1.4K]
3 years ago
12

Which of the following is the fundamental element found in all living organisms? A-iron B-carbon C-calcium D-magnesium

Chemistry
2 answers:
V125BC [204]3 years ago
8 0

Answer:

For me

Explanation:

it's carbon because it's part of our regular respiration

Elodia [21]3 years ago
5 0

Answer:

D

Explanation:

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umka2103 [35]

Explanation:

Moles of NaOH = 10g / (40g/mol) = 0.25mol.

0.25mol / 500g = 0.50mol / 1000g = 0.50mol/dm³.

The molarity is 0.50mol/dm³.

4 0
3 years ago
A compound is found to contain 38.65 % carbon, 16.25 % hydrogen, and 45.09 % nitrogen by mass. what is the empirical formula for
iren [92.7K]

The molar mass of carbon is 12, hydrogen is 1, and nitrogen is 14, hence the ratio are:

 

C = 38.65 / 12 = 3.22

H = 16.25 / 1 = 16.25

N = 45.09 / 14 = 3.22

 

Divide the three by the lowest ratio which is 3.22:

 

C = 3.22 / 3.22 = 1

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So the empirical formula is:

CHN

5 0
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steposvetlana [31]

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puteri [66]

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Explanation:

8 0
4 years ago
Determine if 12:16 and 72:96:are equivalent ratios
creativ13 [48]

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