Question

CS2 is reacted with oxygen according to the following equation. What mass of O2 would react completely with 385 grams of CS2?

Answer 1

There will react 485.76 grams of O2

Step-by-step explanation:

Step 1: Data given

Mass of CS2 = 385 grams

Molar mass CS2 = 76.14 g/mol

Molar mass of O2 = 32 g/mol

Step 2: The balanced equation

CS2(s) + 3O2(g) → CO2(g) + 2SO2(g)

Step 3: Calculate moles of CS2

Moles CS2 = mass CS2 / molar mass CS2

Moles CS2 = 385 grams / 76.14 g/mol

Moles CS2 = 5.06 moles

Step 4: Calculate moles of O2

For 1 mol of CS2 we need 3 moles of O2 to produce 1 mol of CO2 and 2 moles of SO2

For 5.06 moles of CS2, we need 3* 5.06 = 15.18 moles of O2

Step 5: Calculate mass of O2

Mass O2 = moles O2 * molar mass O2

Mass O2 = 15.18 moles * 32.00 g/mol

Mass O2 = 485.76 grams O2

There will react 485.76 grams of O2