Question

Does anyone know the answers for these

Answer 1

Answer: 1. 0.045moles

2. 2.10 grams

Step-by-step explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number
`6.023* 10^(23)` of particles.

To calculate the moles, we use the equation:

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

1.
`\text{Number of moles of zinc nitrate}=(8.51g)/(189.36g/mol)=0.045moles`

2. Mass of
`C_2H_4=moles* {\text {Molar mass}}=0.075moles* 28.05g/mol=2.10g`