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boyakko [2]
3 years ago
6

How many molecules of water of water are in a 821.3 g sample

Chemistry
1 answer:
svetlana [45]3 years ago
6 0

Answer: 2.744 x 1025 molecules

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I'm going to have to say A. My reason to that is because when you leave a cup of hot cocoa (assuming its hot), it gives off the heat (exothermic) the

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A scientist measures the standard enthalpy change for the following reaction to be -327.2 kJ : P4O10(s) 6 H2O(l)4H3PO4(aq) Based
OleMash [197]

Answer:

ΔH°f P4O10(s) = - 3115.795 KJ/mol

Explanation:

  • P4O10(s) + 6H2O(l) ↔ 4H3PO4(aq)
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∴ ΔH°rxn = - 327.2 KJ

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⇒ ΔH°rxn = (4)(- 1289.5088) - (6)(- 285.84) - ΔH°f P4O10(s) = - 327.2 KJ

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⇒ ΔH°f P4O10(s) = - 3115.795 KJ/mol

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3 years ago
Is it possible to tell if an acid or base is strong or weak just by looking at its chemical formula?
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Identify reagents necessary to convert cyclohexane into 1,3-cylohexadiene: notice that the starting material has no leaving grou
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<span>1,3-cylohexadiene i synthesized starting from cyclohexane in following 4 steps.

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2) Elimination Rxn: Dehydrohalogenation of chlorocyclohexane yields cyclohexene.

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4) Elemination Rxn: When dibromocyclohexane is treated with KOH and heated it gives 1,3-cyclohexadiene as shown below,</span>

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3 years ago
What should the temperature of the detergent water be in a 3 compartment sink
kumpel [21]
It should be At least 110°F
3 0
3 years ago
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