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tigry1 [53]
3 years ago
9

99.9% of the matter that makes up living organisms consist of how many elements

Chemistry
1 answer:
gulaghasi [49]3 years ago
7 0

Answer:

6 elements.

Explanation:

99.9% by weight of most living things is made of the six elements: hydrogen, carbon, nitrogen, oxygen, phosphorus, and sulfur (backwards using just the letter abbreviations this spells SPONCH).

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Assuming that gasoline is 100% isooctane, that isooctane burns to produce only CO2CO2 and H2OH2O, and that the density of isooct
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Answer:

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Explanation:

Let's state the combustion reaction:

C₈H₁₈  +  25/2O₂  →   8CO₂  +  9H₂O

Let's calculate the mass of isooctane that reacts.

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First of all, let's convert the volume in L to mL, so we can use density.

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Ratio is 1:8 so 1 mol of isooctane can produce 8 moles of dioxide

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moles . molar mass

2.55×10¹² mol . 44 g/mol = 1.12×10¹⁴ g of CO₂

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