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Sever21 [200]
2 years ago
6

1. How many joules of heat are necessary to melt 500 g of ice at its freezing point?

Chemistry
1 answer:
ololo11 [35]2 years ago
7 0

Answer: To melt 500 g of ice, 4000 joule of heat is required.

Explanation:

I love the helps

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C55H72MgN4O5. How many atoms are in this molecule?
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There are 137 atoms in this molecule. C55 + H72 = 127. 127 + Mg (one atom of magnesium = 128. 128 + N4 = 132. 132 + O5 = 137.
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Lava that cools quickly forms: A. basalt B. granite C.quartz D. none the above
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ammonia (NH3(g) Hf=-45.9 kJ/mol) reacts. with oxygen to produce nitrogen and water (H2O(g) Hf = -241.8 kJ/mol according to the e
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Answer:

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ΔH°_rxn = ΣΔH°_f(products) – ΣΔH°_f(reactants)

ΣΔH°_f(products) = -6(241.8) = -1450.8 kJ

ΣΔH°_f(reactants) = -4(45.9) = -183.6 kJ

ΔH°_rxn =  (-1450.8 + 183.6) kJ = -1267.2 kJ

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3 years ago
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16 is the mass of an atom of Oxygen

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