Question

Chemistry Question, dotn know how to work out A and B. ​

Answer 1

a) 0.133 mol

b) 5.87 g

Step-by-step explanation:

a)

To find the number of moles, we use the formula
`n=(m)/(M_(r) )`, where m is the mass of the given substance in g, and Mᵣ is the relative molecular mass of the substance. Hence,

n of C =
`(1.6)/(12)` =
`(2)/(15)` mol = 0.133 mol (3sf)

b)

Molar ratio of C to CO₂ is 1:1. As such, for every 0.133 mol of C used, 0.133 mol of CO₂ is produced. Using the formula
`m=n*M_(r)`,

m of CO₂ =
`(2)/(15)` × (12 + 2(16))

=
`(2)/(15)` × 44

=
`(88)/(15)` g

= 5.87 g (3sf)