`27 g` of `Al` will react completely with…… `g` of `O_(2)`

Options

A. `8 g`
B. `10 g`
C. `24 g`
D. `49 g`

Answer

C

Explanation

`4Al + 3O_(2) rarr 2Al_(2)O_(3)`
`4 xx 28 g "of" Al implies 3 xx 32 g "of" O_(2)`
`27 g "of" Al implies (3 xx 32)/(4 xx 27) xx 27 implies 24 g`