Question

Can someone help me on some chemistry please? *I'll post the images*

Answer 1

This is for the last question on my edpuzzel

Answer 2

hmm ok give me a min

Answer 3

Okie

Answer 4

It was the 2nd one, thank you though. I got all the rest correct

Answer 5

It's okay, at least you tried. Thank you again

Answer 6

mhm

Answer 7

Just so you know how it's done in the future:

\[(NH_{4})_{3}PO_{4}\]

in chemistry, the number near the bottom right (subscript) of an element only applies to that element.

so the 4 on H ---> 4 hydrogens per 1 NH4
the 4 on the O ---> 4 oxygens per O, etc.

now, if there's a subscript next to something in parentheses, it applies to the whole thing inside the parentheses

so the 3 on (NH4)3 means 3 separate units of NH4

Answer 8

so, putting it all together

\[(NH_{4})_{3}\] ---> 3 nitrogen atoms
\3*4 = 12 hydrogen atoms

PO4 ---> 1 phosphorus atom, 4 oxygen atoms

in total: 3 nitrogen atoms, 12 hydrogen atoms, 1 phosphorus, 4 oxygens

now, go to the periodic table, and add up the masses. start with the mass of 1 nitrogen atom (14.01 g/mol), multiply by 3 ---> 42.03 g/mol from nitrogen

and repeat with the other atoms, then add up the result

Answer 9

Thank you voca, that helped explain it better