2 years ago

Which properties represent a metal ( select all that apply )

Chemistry

1 answer:

blagie [28]2 years ago

4 0

Malleable, shiny and good conductors
A B E

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shell 1 =2

shell 2 =8

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2 years ago

Consider the balanced equation. 2HCl + Mg MgCl2 + H2 If 40.0 g of HCl react with an excess of magnesium metal, what is the theor

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Theoretical yield of hydrogen is 1.11 g

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Balanced equation, $Mg+2HCl\rightarrow MgCl_{2}+H_{2}$

As Mg remain present in excess therefore HCl is the limiting reagent.

According to balanced equation, 2 moles of HCl produce 1 mol of $H_{2}$ .

Molar mass of HCl = 36.46 g/mol

So, 40.0 g of HCl = $\frac{40.0}{36.46}moles$ of HCl = 1.10 moles of HCl

Hence, theoretically, number of moles of $H_{2}$ are produced from 1.10 moles of HCl = $(\frac{1}{2}\times 1.10)moles=0.550moles$

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So, theoretical yield of $H_{2}$ = $(0.550\times 2.016)g=1.11g$

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Answer: How many grams are in 2.5 moles of N2?

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2 years ago

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B would be the answer

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