Question

How Many moles of mgbr2 are in 5.0 grams of mgbr2

Answer 1

`X=0.027mol`

Step-by-step explanation:

Hello,

In this case, we need to apply a mole mass relationship via the molar mass of the magnesium bromide (MgBr2). For it, we first compute its molar mass as shown below:

`M=m_(Mg)+2*m_(Br)=24.305 g/mol+2*79.904 g/mol\\\\M=184.113g/mol`

Hence, we can understand that 1 mole of magnesium bromide contains 184.113 grams of mangnesium bromide, for that reason, for 5 grams of magnesium bromide we have the following moles:

`184.113g\rightarrow 1mol\\5.0g \rightarrow X\\\\X=(5.0g*1mol)/(184.113g) \\\\X=0.027mol`

Best regards.