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nata0808 [166]
3 years ago
8

PLEASE HELP ME ILL MARK YOU!!! Asap!

Chemistry
1 answer:
stiv31 [10]3 years ago
7 0

Answer:

5 molecules of calcium phosphate 15 atoms of calcium 10 atoms of phosphate 40 atoms of oxygen

4

Explanation:

these are the answers for 77 and 78

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How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909
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Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

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The balanced chemical reaction is:

2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)

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most radioactive atoms “spontaneously” decay to a more stable form. where does the “additional” energy go once the atoms have de
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