All categories

3 years ago

a solution is made by dissolving 14.57 g of sodium bromide nabr in 415 of water . what is the molality of the solution?

Chemistry

2 answers:

jenyasd209 [6]3 years ago

4 0

Answer:

The answer to your question is molality = 0.34

Explanation:

Data

mass of NaBr = 14.57 g

mass of water = 415 g.

molality = ?

Process

1.- Calculate the molar mass of NaBr

NaBr = 23 + 80 = 103 g

2.- Calculate the moles of NaBr

103 g of NaBr ------------------ 1 mol

14.57 g of NaBr --------------- x

x = (14.57 x 1) / 103

x = 14.57 / 103

x = 0.141 moles

3.- Calculate the molality

molality = moles / volume

-Substitution

molality = 0.141 / .415

-Result

molality = 0.34

torisob [31]3 years ago

4 0

Answer:

0.341

Explanation:

You might be interested in

What is a giant ball of glowing gas that generates energy by nuclear fusion reaction?

Paladinen [302]

Answer:

sun

Explanation:

3 0

3 years ago

The pressure of a 5.0 L sample of gas changes from 3.0 atm to 10.0 atm while the temperature remains constant. What is the gas’s

lina2011 [118]

Answer:

<h2>The answer is 1.5 L</h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

$P_1V_1 = P_2V_2$

Since we are finding the new volume

$V_2 = \frac{P_1V_1}{P_2} \\$

From the question we have

$V_2 = \frac{5 \times 3}{10} = \frac{15}{10} = \frac{3}{5} \\$

We have the final answer as

Hope this helps you

8 0

3 years ago

Explains why anyone in the classroom can hear that loud teacher across the hall even though the door is barley cracked open

Natasha_Volkova [10]

Diffraction:
Diffraction<span> describes how waves bend, or change direction, as they travel around the edges of obstacles. </span>Diffraction<span> occurs in water waves, </span>sound <span>waves, and light waves, but the amount of </span>diffraction <span>depends on the size of the obstacle or opening in relation to the wavelength of the wave.</span>

5 0

3 years ago

Read 2 more answers

Pleaseeeeeeeeeeee help me asap

d1i1m1o1n [39]

Answer:

eu nu insteleg ce zite

Explanation:

7 0

3 years ago

Read 2 more answers

A solution is made by dissolving 20 ml of acetic acid in 180ml of water. Calculate its volume concentration