3 years ago

Counting atoms pls someone help me

Chemistry

1 answer:

MrRissso [65]3 years ago

7 0

2 atoms of Al
3 of S
4*3=12 of O
so total= 17

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How do I calculate the molecular weight of Mg(OH)2?

vodomira [7]

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<h3>Further explanation</h3>

Given

Mg(OH)2 compound

Required

The molecular weight

Solution

Relative atomic mass (Ar) of element : the average atomic mass of its isotopes

Relative molecular weight (M) : The sum of the relative atomic mass of Ar

M AxBy = (x.Ar A + y. Ar B)

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3 years ago

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a_sh-v [17]

Answer:

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Explanation:

Hello,

In this case, is possible to infer that the thermal equilibrium is governed by the following relationship:

$\Delta H_{iron}=-\Delta H_{H_2O}\\m_{iron}Cp_{iron}(T_{eq}-T_{iron})=-m_{H_2O}Cp_{H_2O}(T_{eq}-T_{H_2O})$

Thus, both iron's and water's heat capacities are: 0.444 and 4.18 J/g°C respectively, so one solves for the mass of water as shown below:

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Best regards.

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3 years ago