Question

you are provided with the following labelled samples which has highest weight 1 gram Ammonia 1 litre Ammonia one gram mole ammonia​

Answer 1

Answer:

Explanation:Answer:

Here's what I got.

Explanation:

Let's start by picking a sample of this ammonia solution that has a volume of

1.0 L

=

1.0

⋅

10

3

mL

Use the density of the solution to convert its volume to mass.

1.0

⋅

10

3

mL solution

⋅

0.90 g

1

mL solution

=

900. g

Now, you know that the solution is

15

%

ammonia, presumably by mass. This tells you that every

100 g

of this solution contain

15 g

of ammonia.

In this case, your sample will contain

900

.

g solution

⋅

15 g NH

3

100

g solution

=

135 g NH

3

Next, use the molar mass of ammonia to convert the mass to moles.

135

g

⋅

1 mole NH

3

17

g

=

7.94 moles NH

3

As you know, the molarity of a solution tells you the number of moles of solute present in exactly

1 L

of the solution. Since our initial sample had a volume of

1.0 L

, you can say that you get

7.94

moles of ammonia, the solute, for every

1.0 L

of the solution.

This means that the molarity of the solution is

molarity = 7.9 mol L

−

1

−−−−−−−−−−−−−−−−−−−−