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2 years ago

A compound has the empirical formula ch and a formula mass of 52.10 amu. part a what is the molecular formula of the compound?

Chemistry

2 answers:

a_sh-v [17]2 years ago

7 0

Answer: The 3rd option (CH4) on edg

Explanation:

Sever21 [200]2 years ago

3 0

<span>C4H4 The compound in question has an equal ratio of hydrogen and carbon. The atomic weight of carbon is roughly 12 and the atomic weight of hydrogen is roughly 1. The mass of the compound in question is roughly 52. 52/13=4 C4H4</span>

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The equation to show the the correct form to show the standard molar enthalpy of formation:

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Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

Given, that 1 mole of $H_2$ gas and 1 mole of $Br_2$ liquid gives 2 moles of HBr gas as a product.The reaction releases 72.58 kJ of heat.

$H_2(g) + Br_2(l)\rightarrow 2HBr(g) ,\Delta H_{f}^o= -72.58kJ$

Divide the equation by 2.

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