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3 years ago

Name two metals which will not liberate hydrogen fromdilute tetraoxosulphate(vi) acid.

1 answer:

6 0

Copper (Cu) and silver (Ag) would not liberate hydrogen because they are less reactive than hydrogen since their standard reduction potential is higher.

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Two identical containers, one red and one yellow, are inflated with different gases at the same volume and pressure. Both contai

Evgen [1.6K]

Answer:

Explanation:

Here we're dealing with the root mean square velocity of gases. We'll provide the formula in order to calculate the root mean square velocity of a gas:

$v_{rms}=\sqrt{\frac{3RT}{M}}$

Here:

$R = 8.314 \frac{J}{K mol}$ is the ideal gas law constant;

$T$ is the absolute temperature in K;

$M$ is the molar mass of a compound in kg/mol.

We know that the gas from the red container is 4 times faster, as it takes 4 times as long for the yellow container to leak out, this means:

$\frac{v_{rms, red}}{v_{rms, yellow}} = 4$

We also know that the temperature of the red container is twice as large:

$\frac{T_{red}}{T_{yellow}} = 2$

Write the ratio of the velocities and substitute the variables:

$\frac{v_{rms, red}}{v_{rms, yellow}}=\frac{\sqrt{\frac{3RT_{red}}{M_{red}}}}{\sqrt{\frac{3RT_{yellow}}{M_{yellow}}}}=4$

Then:

$\frac{\sqrt{\frac{3RT_{red}}{M_{red}}}}{\sqrt{\frac{3RT_{yellow}}{M_{yellow}}}}=\sqrt{\frac{3RT_{red}}{M_{red}}\cdot \frac{M_{yellow}}{3RT_{yellow}}}=\sqrt{\frac{T_{red}}{T_{yellow}}\cdot \frac{M_{yellow}}{M_{red}}}=4$

From here:

$16 = \frac{T_{red}}{T_{yellow}}\cdot \frac{M_{yellow}}{M_{red}}$

Then:

$\frac{M_{yellow}}{M_{red}} = \frac{16}{\frac{T_{red}}{T_{yellow}}} = \frac{16}{2} = 8$

5 0

3 years ago

What is the definition of a chemical change that when two or more substances (molecules) combine to form a new substance (or new

lianna [129]

Answer:

synthesis reaction

Explanation:

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2 years ago

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If you have a sample of honey that has a mass of 20 grams what is the volume

tino4ka555 [31]

Not enough information to find the volume, unless the density of the substance was given or some container of honey with a measure in centimeters cube.

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4 years ago

A blue colored ice cube floating on hot water quickly melts to release its color. The cool, blue water moves downward. This down

liq [111]

The answer I believe would be D) All of these

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4 years ago

Why BF3 acts as a Lewis acid???

GaryK [48]

BF3 acts as a Lewis acid when it accepts the lone pair of electrons that NH3 donates.

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3 years ago