4 years ago

Can someone answer 3 and 4 pls??

Chemistry

1 answer:

balandron [24]4 years ago

4 0

Answer:

The correct answer is C for number 3 while for Number 4 it is C

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A 4 L sample of gas at 298 K and 2 atm contains 0.250 mol of gas. If we add another 0.250 mol of gas at the same pressure and te

andrey2020 [161]

Answer:

$V_2=8L$

Explanation:

Hello there!

In this case, considering the Avogadro's gas law, which treats the volume and moles in a directly proportional way via:

$\frac{V_1}{n_1}=\frac{V_2}{n_2}$

Which can be solved for the final volume, V2, as shown below:

$V_2=\frac{V_1n_2}{n_1}$

Thus, by plugging in the given data, we obtain:

$V_2=\frac{4L*(0.250mol+0.250mol)}{0.250mol}\\\\V_2=8L$

Regards!

4 0

3 years ago

During one researcher's experiment, the total mass of the gas-generating solid and entire assembly was 52.1487g before the react

irinina [24]

Answer:

43.93 g/mol

Explanation:

The mass of the gas before reaction = 52.1487 g

The mass of the gas after reaction = 52.1098 g

Mass of gas generated = 0.0389 g

Moles of the gas = $8.854\times 10^{-4}\ moles$

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Molar\ mass = \frac{Mass\ taken}{Moles}$

$Molar\ mass= \frac{0.0389\ g}{8.854\times 10^{-4}\ moles}$

Molar mass of the gas = 43.93 g/mol

7 0

4 years ago

Which element is a liquid at STP? 1.bromine 2.cesium 3.francium 4.iodine

nexus9112 [7]

Bromine. both Bromine and Mercury are both a liquid at STP. :)

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3 years ago

The Lewis dot model of a metal atom has two dots. Which of the following is true about the atom?

a_sh-v [17]

Answer:

It is present in the second group of the periodic table

Explanation:

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3 years ago

Read 2 more answers

8. 00 g of ethane gas, c2h6, is burned in oxygen. What volume of carbon dioxide gas is produced at 1. 00 atm and 25. 0°c?.

Sonbull [250]

Answer:

Explanation:1 g CH

T = 350 K, P = 1 atm

PV=nRT=

w×R×T

1×V=

×0.0821×350

V=0.495 L

V=495cm

8 0

2 years ago