Phosphoric acid<span>, also known as orthophosphoric acid or phosphoric(V) acid, is a mineral acid with the chemical formula </span><span>H3PO4</span>
Answer:
Explanation:
Method 1 proportion
1 mole of chromium is 52 grams
11.9 moles = x grams
1/11.9 = 52/x Cross multiply
x = 11.9 * 52
x = 618.8 grams
Now I have used an approximate mass for Chromium. The answer you get here is expected to reflect the weigth given on your periodic table Use that to get your answer. You should give a number very close to mine. Round to 3 places as in 619.
Method Two Formula
mols = given mass / molecular mass
11.9 = given mass / 51.9961 Multiply both sides by 51.9961
11.9 *51.9961 = given mass
given mass = 618.75
given mass = 619
Answer:
From the balanced chemical equation 4 iron atoms react with 3 oxygen molecules to yield 2 iron (III) oxide formula units. Or 4 moles of iron atoms react with 3 moles of oxygen molecules to yield 2 moles of iron (III) oxide.
Brass is a homogeneous mixture.
In the liquid state, the copper and zinc formed a solution.
They did not separate from each other when the brass solidified.
Thus, brass is a solid solution.