Number of N atoms in 0.430 mol NH3Express your answer in atoms to three significant figures.
3 answers
Question:
Number of N atoms in 0.430 mol NH3
Express your answer in atoms to three significant figures.
Express your answer in atoms to three significant figures.
Answers
N/Na=n×4
N=0.430×4×6.02×10^23
N=10.3×10^23
N=1.03×10^24atoms
hey there!
mass = 6.75 g
volume = 9 cm³
therefore:
d = mass / volume
d = 6.75 / 9
d = 0.7 g/cm³
answer b
a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound
1st compound contains 88.8 g cu
for cu
m = 63 g /mol
atomic % = 88.8 /63 = 1.42
for o
m = 16 g /mol
atomic % = 11.2 /16 = 0.7
b. the emperical formula of 1st compound is
cu1.4o0.7
cu2o
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