# Question #8eb7d

##### 1 Answer

#### Answer:

#### Explanation:

We're asked to find the mass (in

To solve mass-mass stoichiometry problems like this one, we always use three steps:

- Calculate the moles of the substance with known mass
#"CO"_2# using its*molar mass*. - Use the coefficients of the balanced chemical equation to find the relative number of moles of the substance in question.
- Use the molar mass of that substance to find its mass, in
#"g"#

**1.**

Let's first calculate the number of *moles* of carbon dioxide, using its molar mass (

**2.**

Now, using the coefficients of the equation, let's find the relative number of moles of the substance in question,

**3.**

Finally, let's calculate the number of grams of ethylene, using its molar mass (

rounded to two significant figures, the amount given in the problem (assuming the

Thus, in order to produce