# Question #86b5f

##### 1 Answer

#### Answer:

#### Explanation:

I'm not sure what you mean by "a lot of steps" because you only need one calculation to get the answer here. Basically, the answer is one step away.

I assume that your *mole road map* looks something like this

The problem wants you to convert *moles* of water to *grams* of water, which means that you're going to have to use the **mole** **mass** side of the road map.

The conversion factor that takes you from moles to mass and vice versa is called the **molar mass**.

The **molar mass** of a given compound is simply the mass of **one mole** of that compound. In your case, you must use the molar mass of water to determine how many grams would be equivalent to

Now, water has a molar mass of **for every** one mole of water. Simply put, one mole of water has a mass of

If that's the case, then

#4.401 color(red)(cancel(color(black)("moles H"_2"O"))) * overbrace("18.015 g"/(1color(red)(cancel(color(black)("mole H"_2"O")))))^(color(purple)("molar mass of water")) = "79.284 g"#

You need to round this off to four **sig figs**, the number of sig figs you have for the moles of water

#m_(H_2O) = color(green)("79.28 g")#