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3 years ago

A gas has a volume of 3L at 21'c, if the gas heater to 100'c , what is the new volume?

Chemistry

1 answer:

allochka39001 [22]3 years ago

5 0

Answer:

38.1 L

Explanation:

Data given:

initial volume V1 of a gas = 3 L

initial Temperature T1 of a gas = 21 °C

convert Temperature to Kelvin

T1 = °C +273

T1 = 21°C + 273 = 294 K

final Temperature T2 of a gas = 100°C

convert Temperature to Kelvin

T2 = °C +273

T2 = 100°C + 273 = 373 K

final Volume V2 of a gas = ?

Solution:

This problem will be solved by using Charles' law equation at constant pressure.

The formula used

V1 / T1 = V2 / T2

As we have to find out Volume, so rearrange the above equation

V2 = V1 x T2 / T1

Put value from the data given

V2 = 3 L x 373 K / 294 K

V2 = 38.1 L

So the final Volume of a gas = 38.1 L

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5.20763 to three significant figures

Sergio039 [100]

Answer:

5.21

Explanation: You can only have 3 digits, so you would round to the hundredths place

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3 years ago

luminum and oxygen react according to the following equation: 4Al(s) +3O2(g) --> 2Al2O3(s) What mass of Al2O3, in grams, can

Slav-nsk [51]

Answer: 8.7 grams

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{4.6g}{27g/mol}=0.17moles$

$4Al(s)+3O_2(g)\rightarrow 2Al_2O_3(s)$

As oxygen is in excess, Aluminium is the limiting reagent and limits the formation of products.

According to stoichiometry:

4 moles of aluminium give = 2 moles of $Al_2O_3(s)$

Thus 0.17 moles of aluminium give= $\frac{2}{4}\times 0.17=0.085mol$

Mass of $Al_2O_3=moles\times {\text {molar mass}}=0.085\times 102g/mol=8.7g$

Thus the mass of $Al_2O_3(s)$ is 8.7 grams

8 0

3 years ago

What volume of 0.200 M H2SO* will be needed to neutralize<br><br> 50.00 mL of 0.178 MNaOH?

mixas84 [53]

Answer:

10.00 mL

Explanation:

Please, do not forget to write the dot and 2 of Zeros after the number 10 in the answer!

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

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4 years ago

Atomic numbers of atoms of elements _____ as you read _____ along each row of the periodic table of the elements.

serious [3.7K]

The periodic table increases as you read left to right so it is A.

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4 years ago

Read 2 more answers

A reaction was suppose to produce 20 L of gas. Only 12 litters of gas were produced in the lab. What is the percent yield for th

pogonyaev

Answer:

$\boxed {\boxed {\sf 60 \%}}$

Explanation:

Percent yield is a ratio of the actual yield to the theoretical yield. It is found using this formula:

$\% \ yield= \frac {actual \ yield}{theoretical \ yield} *100$

The actual yield is 12 liters, because that was actually produced in the lab.

The theoretical yield is 20 liters, because that was the expected yield.

$\% \ yield= \frac {12 \ L}{20\ L} *100$

$\% \ yield= 0.6*100$

$\% \ yield= 60$

For this reaction, the percent yield is 60%.

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3 years ago