I'm not sure how to do these and when I looked it up, maybe there was a diff. vocab used. Please help!
1.) How do you do atom/ion inventory of : Cu3(PO4)2
A. _____ formula units Cu3(PO4)2
B. _____ atoms Cu
C. _____ atoms P
D. _____ atoms O
E. _____ ions Cu2+
F. _____ ions PO43−
3. How to perform mole inventory of Cu3(PO4)2
A. ____ formula units Cu3(PO4)2
B. _____ mol Cu
C. _____ mol P
D. _____ mol O
E. _____mol Cu2+
F. _____ molPO43−
Is calculating the molar mass part of determing the ions for #1 and then the mol for #3
I must confess I don't know what the question wants. I'm guessing here but I would try
1
0
0
0
3
2
for question 1.
To do an atom/ion inventory or mole inventory of a chemical formula like Cu3(PO4)2, you need to understand how to count the number of atoms or moles of each element present in the compound.
1.) Atom/Ion Inventory:
A. To find the number of formula units Cu3(PO4)2, you can count the coefficient before the formula. In this case, the coefficient is 1, so the answer is 1 formula unit.
B. To determine the number of atoms of Cu, you need to multiply the subscript (the number after the element symbol) by the coefficient before the formula. In this case, the subscript for Cu is 3, and the coefficient is 1, so the answer is 3 atoms.
C. To find the number of atoms of P, again, you multiply the subscript (2 in this case) by the coefficient (1). So, the answer is 2 atoms.
D. To count the number of atoms of O, multiply the subscript (4) by the coefficient (1). The answer is 4 atoms.
E. To determine the number of ions Cu2+, you need to multiply the subscript by the coefficient. In this case, the coefficient is 1, and the subscript is 3. So, the answer is 3 ions.
F. Similarly, to count the number of ions PO43−, multiply the subscript (2) by the coefficient (1). The answer is 2 ions.
3.) Mole Inventory:
A. To find the number of formula units Cu3(PO4)2 in terms of moles, you need to convert the coefficient before the formula to moles. Since the coefficient is 1, the answer is 1 mole.
B. To determine the number of moles of Cu, you multiply the coefficient (1) by the Avogadro's number (6.022 x 10^23, which is the number of particles in 1 mole, also known as 1 mol^-1). Therefore, the answer is 1 x 6.022 x 10^23 moles.
C. To find the number of moles of P, multiply the subscript (2) by the coefficient (1) and then multiply by Avogadro's number. Hence, the answer is 2 x 1 x 6.022 x 10^23 moles.
D. To count the number of moles of O, multiply the subscript (4) by the coefficient (1) and then multiply by Avogadro's number. The answer is 4 x 1 x 6.022 x 10^23 moles.
E. To determine the number of moles of Cu2+, you multiply the subscript (3) by the coefficient (1) and then multiply by Avogadro's number. The answer is 3 x 1 x 6.022 x 10^23 moles.
F. Similarly, to count the number of moles of PO43−, multiply the subscript (2) by the coefficient (1) and then multiply by Avogadro's number. Hence, the answer is 2 x 1 x 6.022 x 10^23 moles.