Hmmm, I believe the answer is "Exchange of energy with the surroundings"
Answer:
It looked like the continents fit together like puzzle pieces
Could I Maybee get brainlest if someone else answers?
So the first one is yellow and the other one is white
<span>The answer is 8. Hope this help!!!
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Molar mass is the ratio of the mass to that amount of the substance. The mass of the barium nitrate in the formula unit is 23.0 grams.
<h3>What is mass?</h3>
The mass of a substance is the product of the molar mass of the compound and the number of moles of the compound.
Given,
Molar mass of barium nitrate = 261.35 g/mol
If,
have a mass of 261.35 g/mol then,
formula units will have a mass of,

Therefore, option C. 23.0 gm is the mass of barium nitrate.
Learn more about mass here:
brainly.com/question/24958554