Answer:
Explanation:
ρ =
m
V
=
30.8 gram
34.9 cubic meter
= 0.88252148997135 gram/cubic meter
= 0.00088252148997135 kilogram/cubic meter
Answer:
Number of molecules = 2.61 x 10²³
Explanation:
Given:
Volume of tetra-chloride = 42 ml
Density = 1.59 g/ml
Find:
Number of molecules
Computation:
Mass = Volume of tetra-chloride x Density
Mass = 42 x 1.59
Mass = 66.78
Molecular mass of tetra-chloride = 154 g/mol
Moles = 66.78 / 154
Moles = 0.4337
0.4337 mole = 0.4337 x Avogadro number
0.4337 mole = 0.4337 x 6.022 x 10²³
Number of molecules = 2.61 x 10²³
Answer:
5727 years or 5730 (rounded to match 3 sig figs) whichever one your teacher prefers
Explanation:
First Order decay has a half life formula of Half Life = Ln (2) / k = 0.693/K
Half-life = 0.693/k = 0.693/1.21 x10-4 = 5727 years or 5730 (rounded to match 3 sig figs)
This should be correct because if you google the half-life of 14 C it is ~ 5700 years
The type of solvent that is needed to remove an oil stain would be an organic solvent. This is would dissolve the oil from the fabric to the solvent. Oil is nonpolar which would have the same polarity of an organic solvent. Hope this answers the question. Have a nice day.
1200cm³ of gas
Explanation:
From the analogy provided in this problem,
we know that;
three tablets will produce 600cm³ of gas
This implies that;
1 tablet of the antacid will produce 
= 200cm³
If 1 tablet of the antacid produces 200cm³ of gas,
under the same condition;
6 tablets will produce = 6 x 200 = 1200cm³ of gas
learn more:
Boyle's law brainly.com/question/8928288
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