Answer:
CaF2
Explanation:
Because HF is a weak acid, fluoride salts behave as bases in aqueous solution. As a Lewis base, F– accepts a proton from hydronium, which is transformed into a water. Picture is attached.
Answer : The mass of iron needed is 29.5 grams.
Explanation : Given,
Mass of 
= 12 g
Molar mass of = 32 g/mol
First we have to calculate the moles of .
Now we have to calculate the moles of 
The balanced chemical equation is:
From the reaction, we conclude that
As, 3 moles of react with 4 moles of
So, 0.375 mole of react with 
mole of
Now we have to calculate the mass of
Molar mass of = 59 g/mole
Therefore, the mass of iron needed is 29.5 grams.
Answer:
92.26% of C
Explanation:
To solve this problem we must assume we have 1 mole of benzene. The mole contains 6 moles of C and 6 moles of H. We have to convert these moles to grams in order to find the total mass and mass percent will be:
Mass atom / Total mass * 100
<em>Mass C: </em>6mol C * (12.0107g / mol) = 72.0642g
<em>Mass H: </em>6mol H * (1.00794g / mol) = 6.04764g
<em>total mass: </em>72.0642g + 6.04764g = 78.11184g
Mass percent of C will be:
72.0642g C / 78.11184g* 100
<h3>92.26% of C</h3>
Rock a is a sedimentary and rock B is a sediment rock also known as sandstone
