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Alborosie
3 years ago
8

A dm^3 is equal to how many cm^3

Chemistry
1 answer:
DanielleElmas [232]3 years ago
7 0

Answer:1000 cubic centimetres

Explanation:

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What is the percent by mass of carbon in acetone c3h6o
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Well, the molar mass of acetone would be

3(12.011)+6(1.008)+15.999 , which cleans up to be 58.08 grams.

out of this total, 3(12.011), or 36.033 grams are carbon

So, to find the percent, you do part over whole

36.033/58.08, which equals 0.6204 with significant figures

multiply that by 100 to get 62.04%

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Phosgene has the elemental compositions of 12.14% carbon, 16.17 % oxygen, and 71.69% chlorine by mass.
inessss [21]

Answer:

a) COCl₂.

b) The molecular formula is COCl₂.

Explanation:

To obtain empirical formula of phosgene you should divide elemental compositions over atomic mass of each atom, and divide these results between the smallest, thus:

C = 12,14%/12,01 = 1,01

O = 16,17%/16 = 1,01

Cl = 71,69%/35,45 = 2,02

Empirical formula:

C = 1,01/1,01 = 1

O = 1,01/1,01 = 1

Cl = 2,02/1,01 = 2

C₁O₁Cl₂ ≡ COCl₂

b) You need to find the molar mass of the empirical formula to determine the ratio of the real formula, thus:

1×C 12,01g/mol =

1×O 16 g/mol =

2×Cl 35,35g/mol = 98,91g/mol

As real molecular mass is 98,9 g/mol. The molecular formula: COCl₂

I hope it helps!

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4 years ago
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