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Elenna [48]
3 years ago
6

HELP ASAP PLEASE Use the word Precision in a sentence relating to chemistry!

Chemistry
1 answer:
Leno4ka [110]3 years ago
7 0

Answer:

I needed to use good precision in my measurement for my chemistry lab

Explanation:

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local winds

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What four elements did the ancient greeks think the world was made of ?
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The ancient greeks thought that the earth was composed of earth, water, fire, and air.

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The effusion rate of hcl is 43. 2 cm/min in a certain effusion apparatus. What is the rate of effusion of ammonia in the same ap
olga2289 [7]

The rate of effusion of ammonia (NH₃) in the same apparatus is 63.3 cm/min

<h3>Graham's law of diffusion </h3>

This states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass i.e

R ∝ 1/ √M

R₁/R₂ = √(M₂/M₁)

<h3>How to determine the rate of ammonia (NH₃) </h3>
  • Rate of HCl (R₁) = 43.2 cm/min
  • Molar mass of HCl (M₁) = 1 + 35.5 = 36.5 g/mol
  • Molar mass of NH₃ (M₂) = 14 + (3×1) = 17 g/mol
  • Rate of NH₃ (R₂) =?

R₁/R₂ = √(M₂/M₁)

43.2 / R₂ = √(17 / 36.5)

Cross multiply

43.2 = R₂ × √(17 / 36.5)

Divide both side by √(17 / 36.5)

R₂ = 43.2 / √(17 / 36.5)

R₂ = 63.3 cm/min

Thus, the rate of effusion of ammonia is 63.3 cm/min

Learn more about Graham's law of diffusion:

brainly.com/question/14004529

5 0
3 years ago
What is the chemical formula for nitrogen monoxide?
vekshin1

Answer: the formula is NO

8 0
2 years ago
Why does 4.03/0.0000035 = 1.2 x 106, instead of a different number of significant figures?
jasenka [17]

Explanations:- As per the significant figures rule, In multiplication and division, we go with least number of sig figs.

4.03 has three sig figs where as 0.0000035 has two sig figs only, The zeros in this number are not sig figs as they are just holding the place values. As the least number of sig figs here is two, the answer needs to be reported with two sig figs only.

\frac{4.03}{0.0000035}=1.2*10^6



4 0
4 years ago
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