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Yuki888 [10]
4 years ago
5

Help me out with these three formulas

Chemistry
1 answer:
ddd [48]4 years ago
7 0
Carbon dioxide it should be water oxygen
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1.674×10-4 mol of an unidentified gaseous substance effuses through a tiny hole in 86.6 s. Under identical conditions, 1.715×10-
siniylev [52]
<h2>Answer:</h2>

44.06 g/mol

<h3>Explanation:</h3>

We are given;

  • Number of moles of unidentified gas as 1.674×10^-4 mol
  • Time of effusion of unidentified gas 86.6 s
  • Number of moles of Argon gas as 1.715×10^-4 mol
  • Time of effusion of Argon gas is 84.5 s

We are supposed to calculate the molar mass of unidentified gas

<h3>Step 1: Calculate the effusion rates of each gas</h3>

Effusion rate = Number of moles/time

Effusion rate of unidentified gas (R₁)

 =  1.674×10^-4 mol ÷ 86.6 s

 = 1.933 × 10^-6 mol/s

Effusion rate of Argon gas (R₂)

 = 1.715×10^-4 mol ÷ 84.5 sec

= 2.030 × 10^-6 mol/s

<h3>Step 2: Calculate the molar mass of unidentified gas</h3>
  • Assuming the molar mass of unidentified gas is x;
  • We can use the Graham's law of effusion to find x;
  • According to Graham's law of diffusion;

\frac{R_{1}}{R_{2}}}=\frac{\sqrt{MM_{Ar}}}{\sqrt{X}}

But, Molar mass of Argon is 39.948 g/mol

Therefore;

\frac{1.933*10^-6mol/s}{2.030*10^-6mol/s}}=\frac{\sqrt{39.948}}{\sqrt{X}}

0.9522=\frac{\sqrt{39.948}}{\sqrt{X}}

Solving for X

x = 44.06 g/mol

Therefore, the molar mass of the identified gas is 44.06 g/mol

3 0
4 years ago
Enzymes in your body act as a catalyst. Thus the role of enzymes is to
Arturiano [62]

Answer:

o increase the rate of chemical reaction

Explanation:

Enzymes are chemical catalysts that speed up chemical reactions by lowering their activation energy. Enzymes have an active site with a unique chemical environment that fits particular chemical reactants for that enzyme, called substrates. Enzymes and substrates are thought to bind according to an induced-fit model.

6 0
3 years ago
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Fractional distillation is used to separated
UkoKoshka [18]

Answer: Fractional distillation is used to separate liquids with differing boiling points

Explanation:

Sublimation is used to separate volatile substance from a non volatile substance where volatile substance gets converted from solid to gas.

Fractional distillation is separation of a liquid mixture into fractions which differ in boiling points by means of distillation by use of a fractionating column.

Chromatography is a separation method where different rates of adsortion of different components is used to separate substances.

5 0
3 years ago
Jim went for a 3.75 hour run. How many minutes did he run?
tensa zangetsu [6.8K]
An hour is 60 minutes. So you multiple the hot by 60. You get 180 minutes plus the 75 remaining minutes. The answer is 255
5 0
3 years ago
PLEASE HELP ME ASAP!!! THIS IS DUE UNTIL 1:30 PM!!! Tell how many Elements are in this compound and tell what the Elements are.
Nuetrik [128]

Answer: 13

Explanation: I got it right

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3 years ago
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