Find the formula mass of the compound
H2SO4.
1. 98.09 amu
2. 96.07 amu
3. 97.08 amu
4. 81.08 amu
5. 89.09 amu
Look on the periodic table and add everything.
2*H + 1*S + 4*O = ?
how would you do 3PO-4
Is that 3PO^-4 or 3(PO4)^3-
PO3-
4
I can't tell what you mean.
PO3-4 is
1*P + 3*O
A number as a subscript means you multiply what it is a subscript to by that number.
P2 is 2*P
PO4 is
1P + 4*O
H3PO4 is
3*H + 1*P + 4*O
If there are parentheses, the subsceript multiplies everything in the parentheses by that number.
Ba3(PO4)2 is
3*Ba + 2*P + 8*O
A number as a coefficient multiplies the entire molecule by that number
2NaCl is 2Na + 2Cl
or
2Na2SO4 is
4*Na + 2*S + 8*O
2nacl
To find the formula mass of a compound, you need to calculate the sum of the atomic masses of all the atoms in the formula.
Let's break down the formula H2SO4:
H2 - There are two hydrogen atoms with an atomic mass of 1.01 amu each. So, the total atomic mass of hydrogen is 2 x 1.01 amu = 2.02 amu.
S - There is one sulfur atom with an atomic mass of 32.07 amu.
O4 - There are four oxygen atoms with an atomic mass of 16.00 amu each. So, the total atomic mass of oxygen is 4 x 16.00 amu = 64.00 amu.
Now, add up the atomic masses of all the atoms in the compound:
2.02 amu (hydrogen) + 32.07 amu (sulfur) + 64.00 amu (oxygen)
= 98.09 amu
Therefore, the correct answer is 1. 98.09 amu.