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4 years ago

All elements in the same group (Column) on a periodic table have what in common?

Chemistry

1 answer:

vesna_86 [32]4 years ago

5 0

They have the same number of valence electrons.

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A container holds 0.490 m3 of oxygen at an absolute pressure of 5.00 atm. A valve is opened, allowing the gas to drive a piston,

mash [69]

Answer: The new volume will be $2.04m^3$

Explanation:

To calculate the new volume, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.

The equation given by this law is:

$P_1V_1=P_2V_2$ (at constant temperature)

where,

$P_1\text{ and }V_1$ are initial pressure and volume.

$P_2\text{ and }V_2$ are final pressure and volume.

We are given:

$P_1=5.00atm\\V_1=0.490m^3\\P_2=1.20atm\\V_2=?m^3$

Putting values in above equation, we get:

$5atm\times 0.490m^3=1.20\times V_2\\\\V_2=2.04m^3$

Hence, the new volume will be $2.04m^3$

5 0

3 years ago

What volume (mL) of the partially neutralized stomach acid was neutralized by NaOH during the titration? (portion of 25.00 mL sa

almond37 [142]

The question is incomplete, here is the complete question:

What volume (mL) of the partially neutralized stomach acid having concentration 2 M was neutralized by 0.1 M NaOH during the titration? (portion of 25.00 mL NaOH sample was used; this was the HCl remaining after the antacid tablet did it's job)

Answer: The volume of HCl neutralized is 1.25 mL

Explanation:

To calculate the volume of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of stomach acid which is HCl

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=1\\M_1=2M\\V_1=?mL\\n_2=1\\M_2=0.1M\\V_2=25mL$

Putting values in above equation, we get:

$1\times 2\times V_1=1\times 0.1\times 25\\\\V_1=\frac{1\times 0.1\times 25}{1\times 2}=1.25mL$

Hence, the volume of HCl neutralized is 1.25 mL

3 0

3 years ago

Which of the following makes up the Earth's hydrosphere?

kirza4 [7]

Just search up what makes earth’s atmosphere then you will get all the answers there

3 0

3 years ago

How many moles of water are produced from 373 mol Al??

stepladder [879]

I cannot come up with a reaction which you can convert directly from Al to H2O.

But you can convert from Al2O3 to H2O by adding HCL solvent.

5 0

3 years ago

Read 2 more answers

A person's heart beats 72 times a minute. At this rate, how many times does it beat in one hour?

sesenic [268]

At one minute, a persons's heart beats 72 times.

Therefore, in one hour or 60 minutes, a person's heart will beat (60×72) times, i.e., 4320 times

Answer is 4320 times

6 0

3 years ago