How many moles of carbon are required to produce 30g CF4?

Question

Chemistry equation about a balanced equation that has elements in a reaction what contains an amount of moles and grams.

Answer 1

First, write a balanced equation for the reaction taking place:

C + 2F2 ==> CF4

Next, find out how many moles of CF4 a made:

30 g CF4 x 1 mol CF4/88.0 g = 0.3409 moles CF4

Finally, convert this to mass (g) of C required using the coefficients in the balanced equation:

0.3409 mol CF4 x 1 mol C/mol CF4 x 12.0 g C/mol C = 4.09 g C = 4 g C (1 sig. fig.)