Question

You have 100 grams of rubidium bromide (RbBr). How many moles do you have?

a) 0.61 mol
b) 1.00 mol
c) 2.00 mol

Answer 1

Answer: The moles of rubidium bromide for the given amount is 0.61 moles

Step-by-step explanation:

To calculate the number of moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}`

We are given:

Given mass of RbBr = 100 g

Molar mass of RbBr = 165.37 g/mol

Putting values in above equation, we get:

`\text{Moles of RbBr}=(100g)/(165.37g/mol)=0.61mol`

Hence, the moles of rubidium bromide for the given amount is 0.61 moles

Answer 2

a) 0.61 mol

Step-by-step explanation:

165.3718 g Rubidium Bromide = 1 mol

100 g Rubidium Bromide = 1/165.3718 x 100

= 0.61 mol