Can you check my chemistry

[From: ] [author: ] [Date: 12-03-10] [Hit: ]

7. 86.8. 62.Thanks a lot appreciate it-What am I supposed to be checking?You dont seem to have answered any of them.......

Rounding to three significant figures please.

Percent composition for the first two.
1.Ammonium Chloride (nitrogen hydrogen chlorine)
2.Calcium Phosphate (calcium phosphorus oxygen)

Molar mass
3.Ammonium phosphate
4.calcium hydroxide

Grams to moles
5.1.0 mol KBr
6.2.0 mol KNOsubcript3

Grams to moles
7. 86.84g LiBr
8. 62.3g MgFsubscript2

Balance this equation
Iron + sulfur yields iron(2) sulfide

Phosphorus + oxygen yields diphosphorus pentoxide

Thanks a lot appreciate it

-

What am I supposed to be checking? You don't seem to have answered any of them.....

1

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