# Question #4e6bd

##### 2 Answers

88.5

Likely to be Y atomic mass of 88.9)

Or Sr (atomic mass of 87.62)

#### Explanation:

So you can calculate how many mols of

n =

From the reaction, you can see that you need 2 mols of Hydroxide ions for one metal ion. Therefore, you have half the number of metal ions in the solution that hydroxide ions.

We can now calculate the metals molar mass;

relative atomic mass = **= 88.5 #gmols^-1#**

Molar mass = 87.7 g/mol. The element is strontium.

#### Explanation:

The chemical equation for the overall reaction is

**Calculate the moles of #"OH"^"-"#**

**Calculate the moles of #"M"#**

**Calculate the molar mass of #"M"#**

**Identify #"M"#**

The Group 2 element with molar mass closest to 87.7 g/mol is

strontium (