1.5 X 10^23 atoms of Sodium, Na = ? moles Na 3X10^23 atoms of Argon, Ar. = ? grams Ar 1.8X10^24 atoms of Ar gas

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1.5 X 10^23 atoms of Sodium, Na = ? moles Na
3X10^23 atoms of Argon, Ar. = ? grams Ar
1.8X10^24 atoms of Ar gas at STP = ? liters Ar at STP
How many moles of ammonium carbonate are in a 192g sample of (NH4)2CO3 (s)?
The mass of 1/3 (one third) moles of tricalcium phosphate, Ca3(PO4)2 is closest to
A 103g
B 0.001g
C 2x 10^23g
D310g
E450g
F160g
G18x10^24g
H 0.33g
| 1.8 × 10^24
The molarity of a solution prepared by dissolving 120 grams NaOH in a total volume of 3 liters of
aqueous solution is closest to:
A1.0M
B2.0M
C0.5M
D3.0M
E0.33M
F80M
G20M
H4.01