Answer: d=m/v
Explanation: The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Answer:
By conducting a chemical reaction.
Explanation:
To form a new substance from old ones, you have to allow the old substances to react with each other, forming something different.
Answer:
4.9 x 10²²hockey pucks
Explanation:
Given parameters:
Number of moles of hockey = 0.0814moles
Unknown:
Number of pucks there = ?
Solution:
A mole of a substance is made up of Avogadro's number of particles.
Therefore;
1 mole of hockey pucks will contain 6.02 x 10²³ hockey pucks
0.0814 mole of hockey pucks will contain :
0.0814 x 6.02 x 10²³ = 4.9 x 10²²hockey pucks
mFeSO₄ = mFe + mS + 4·mO = 56g + 32g + <span>4·</span>16g = <u>152 g/mol</u>
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The second one- new substances that are present at the end of a reaction