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vesna_86 [32]
3 years ago
5

Can someone help me pls! Ack I accidently put chemistry. This is math LoL

Chemistry
1 answer:
andrew11 [14]3 years ago
8 0
87.5% (126/144) 126 is from subtracting 144 and 18
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Compound C with molar mass 205gmol-1 , contains 3.758g of carbon , 0.316g of hydrogen and 1.251g of oxygen. Determine the molecu
labwork [276]

Answer:

Molecular formula => C₁₂H₁₂O₃

Explanation:

From the question given above, the following data were obtained:

Molar mass of compound = 205gmol¯¹

Mass of Carbon (C) = 3.758 g

Mass of Hydrogen (H) = 0.316 g

Mass of Oxygen (O) = 1.251 g

Molecular formula =?

We'll begin by determining the empirical formula of the compound. This can be obtained as follow:

C = 3.758 g

H = 0.316 g

O = 1.251 g

Divide by their molar masses

C = 3.758 /12 = 0.313

H = 0.316 /1 = 0.316

O = 1.251 /16 = 0.078

Divide by the smallest.

C = 0.313 / 0.078 = 4

H = 0.316 / 0.078 = 4

O = 0.078 / 0.078 = 1

Thus, the empirical formula of the compound is C₄H₄O

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Molar mass of compound = 205gmol¯¹

Empirical formula => C₄H₄O

Molecular formula =>?

[C₄H₄O]ₙ = 205

[(12×4) + (4×1) +16]n = 205

[48 + 4 +16]n = 205

68n = 205

Divide both side by n

n = 205 / 68

n = 3

Molecular formula => [C₄H₄O]ₙ

Molecular formula => [C₄H₄O]₃

Molecular formula => C₁₂H₁₂O₃

8 0
2 years ago
How many elements are there in mint chocolate chip ice cream?
Vsevolod [243]
Well, it is a h<span>eterogeneous mixture.... but im not sure EXACTLY what you mix to get the best flavor of ice cream in the world; mint chocolate chip...</span>
7 0
3 years ago
What is the chemical symbol for the starting substance 2nacl+2h2o-&gt;2naOH+cl2+h2
ruslelena [56]
He symbol "=" is used to 
<span>starting substance </span>
6 0
3 years ago
A student increases the temperature of a 673 cm^3 balloon from 275 K to 460 K.
Kruka [31]

Answer:

1125.75 cm³

Explanation:

We are given;

Initial volume; V1 = 673 cm³

Initial temperature; T1 = 275 K

Final temperature; T2 = 460 K

From Charles law, we can find the new volume from;

V1/T1 = V2/T2

V2 = (V1 × T2)/T1

V2 = (673 × 460)/275

V2 = 1125.75 cm³

8 0
2 years ago
Predict the product of this reaction <br><br> Al(s) + N2(g)—-&gt;
Rudik [331]
I attended the answer. I hope this helps you.

8 0
2 years ago
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