Question

The mass of one mole of sugar is 386 g. You used 19 g of sugar. Calculate the numbermoles of sugar you used.

Answer 1

Answer: 0.049 moles of sugar were used

Step-by-step explanation:

The question requires us to determine the number of moles of sugar used, knowing that 19g were used and that there are 386g of sugar in one mole of this substance.

From the information given by the question, we can write:

1 mol sugar -------------- 386g sugar

And, if we add the mass used of sugar to calculate the number of moles that it corresponds, we'll have:

1 mol sugar -------------- 386g sugar

x ---------------------------- 19g sugar

where "x" is the number of moles we want to calculate.

Solving for x, we'll have the following calculation:

`x=19g\text{ sugar}*\frac{1mol\text{ sugar}}{386g\text{ sugar}}=0.049mol\text{ sugar}`

Therefore, 0.049 moles of sugar were used.