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1 year ago

Select the isotopes from the following? A) 21/10 B) 22/10 C) 23/11 D)23/12

Chemistry

1 answer:

iren [92.7K]1 year ago

8 0

The isotopes of the same element in the given options are 21/10 and 22/10 (option A and B).

<h3>What is an isotope?</h3>

Isotopes are two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei.

The above definition shows that atoms of isotopes will have the same atomic number but a different mass number.

Isotopes of the same elements have different number of neutrons and this causes the difference in mass numbers.

According to this question, 21/10 and 22/10 are isotopes of the same element because they have the same atomic number.

Learn more about isotopes at: brainly.com/question/11680817

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2 years ago

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3 years ago

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2 years ago

Consider 2 Al + 6 HCl → 2 AlCl3 + 3 H2 , the reaction of Al with HCl to produce hydrogen gas. What is the pressure of H2 if the

Margaret [11]

Answer : The pressure of hydrogen gas is 8.96 atm.

Explanation :

The given balanced chemical reaction is:

$2Al+6HCl\rightarrow 2AlCl_3+3H_2$

From the balanced chemical reaction we conclude that,

As, 2 moles of Al react to give 3 moles of $H_2$ gas

So, 4.50 moles of Al react to give $\frac{3}{2}\times 4.50=6.75$ moles of $H_2$ gas

Now we have to calculate the moles of $H_2$ gas when percent yield is 75.4.

$\text{The moles of }H_2=75.4\% \times 6.75=\frac{75.4}{100}\times 6.75=5.09moles$

Now we have to calculate the pressure of $H_2$ gas.

Using ideal gas equation :

PV = nRT

where,

P = Pressure of hydrogen gas = ?

V = Volume of the hydrogen gas = 14.0 L

n = number of moles of hydrogen gas = 5.09 moles

R = Gas constant = $0.0821L.atm/mol.K$

T = Temperature of hydrogen gas = 300 K

Putting values in above equation, we get:

$P\times 14.0L=5.09mol\times 0.0821L.atm/mol.K\times 300K\\\\P=8.96atm$

Therefore, the pressure of hydrogen gas is 8.96 atm.

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2 years ago

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2 years ago

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