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3 years ago

In the reaction Mg(s) + Br2() → MgBrz(s), what should be the coefficient for

Chemistry

1 answer:

lbvjy [14]3 years ago

6 0

Answer:

Explanation:

Chemical equation:

Mg + Br₂ → MgBr₂

Balanced chemical equation:

Mg + Br₂ → MgBr₂

Left hand side Right hand side

Mg = 1 Mg = 1

Br = 2 Br = 2

There are one Mg and 2 Br atoms on both side of equation thus this equation is balanced. Thus coefficient with bromine is 1.

Mg is present in group 2 it loses two valance electrons and get +2 oxidation state. Bromine is present in group 17 have 7 valence electrons. Thus one bromine atom need only one electron to complete the octet that's why two bromine atoms will attached with one magnesium atom to cancel the charge +2 and make the compound neutral.

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Answer: d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

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Thus the enthalpy change for the given reaction is -705.55kJ

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3 years ago

A gas at 20.0°C and 52.1 mL is heated to 93.5°C. What is the new volume?

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$\frac{ V_{1} }{ T_{1} }$ = $\frac{ V_{2} }{ T_{2} }$
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Solve for $V_{2}$

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