As the question tells you, you need to use the formula
% mass= mass of solute/ mass of solution x 100
mass solute= 30.0 g
mass of solution= 30.0 + 270.0= 300.0 g
% mass= 30.0/ 300.0 x 100= 10%
answer is B
I think that it might represent Velocity
Answer:
a. 342.9 kJ of heat are absorbed.
Explanation:
Calculation of the moles of 
as:-
Mass = 20.00 g
Molar mass of = 17.031 g/mol
The formula for the calculation of moles is shown below:
Thus,
Given that:- 
It means that 1 mole of undergoes reaction and absorbs 1168\ kJ of heat
So,
1168 mole of undergoes reaction and absorbs 
of heat
<u>Amount of heat absorbed = + 342.9 KJ</u>
Answer:
Volunteering helps the teens gain new skills necessary for the job market such as leadership, communication skills, dependability, time management, and decision making.
Explanation:
The Hidden Values of Volunteering
Learn New Skills. One fantastic thing that volunteering can offer you is a new understanding of your own abilities. ...
Test for Your Future. An added side effect of volunteering is that it gives you an opportunity to try out possible careers, majors, and opportunities. ...
Meet New People. ...
Accomplish Something Important.
HOPE THIS HELPED ❤✨
