Fe + O2 – Fe2O3 Which of the following fractions can be used for the mole ratio to determine the mass of Fe from a known mass of Fe2O3?
a
NA
Oь
3
2
2
3

2
4

m

step-by-step explanation:

answer: rolling a number cube and flipping a coin.

step-by-step explanation:

3/20

step-by-step explanation:

well, there are 20 outcomes, and 3 of them you want. so, 3/20

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours