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Lyrx [107]
2 years ago
6

How do you calculate annual layers of snow from the past?

Chemistry
1 answer:
Zina [86]2 years ago
6 0
It would be count ice layers
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Mg + 2HCl --> H2 + MgCl2 How many moles of H2 will form from 20 moles of HCl
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How many kilojoules of heat are needed to completely vaporize 42.8 grams of c4h10o at its boiling point given that c4h10o has a
Darina [25.2K]
Answer is: 15.30 kilojoules of heat are needed to completely vaporize C₄H₁₀<span>.
m(</span>C₄H₁₀) = 42.8 g.
M(C₄H₁₀) = 74.12 g/mol.
n(C₄H₁₀) = m(C₄H₁₀) ÷ M(C₄H₁₀).
n(C₄H₁₀) = 42.8 g ÷ 74.12 g/mol.
n(C₄H₁₀) = 0.577 mol.
Q = n(C₄H₁₀) · ΔHvap.
<span>Q = 0.577 mol </span>· 26.5 kJ/mol.
<span>Q = 15.30 kJ, heat of butane.

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