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3 years ago

What isotope has 18 protons and 22 neutrons?

Chemistry

1 answer:

Nesterboy [21]3 years ago

6 0

Answer:

Argon.

Explanation:

Argon is the element having 18 protons and 22 neutrons present in its nucleus. so its atomic number is 18 and mass number is 40 if we added both number of protons and neurons. Argon belongs to noble family due to completion of outermost shell and non reactive nature. It is the third most abundant gas about 0.934% present on the earth after nitrogen and oxygen.

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Aqueous strontium sulfide and aqueous copper(II) sulfate

ryzh [129]

Answer: The reaction does occur.

Explanation: For the reaction of aqueous strontium sulfide and aqueous copper(II) sulfate, the reaction follows:

$SrS(aq.)+CuSO_4(aq.)\rightarrow SrSO_4(aq.)+CuS(s)$

This reaction is a type of precipitation reaction.

The precipitate formed is CuS which is black in color.

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3 years ago

The pressure of a gas is caused by

katen-ka-za [31]

The rapid motion and collisions of molecules with the walls of the container causes pressure.

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3 years ago

Read 2 more answers

How many grams of hydrogen is produced from 12.5 G of MG reacting with hydrochloric acid in this balanced equation?

k0ka [10]

Answer:

1.03 grams of hydrogen is produced from 12.5 g of Mg reacting with hydrochloric acid.

Explanation:

The balanced reaction is:

Mg+ 2 HCl → MgCl₂ + H₂

By stoichiometry of the reaction, the following amounts of moles of each compound participate in the reaction:

Mg: 1 mole
HCl: 2 moles
MgCl₂: 1 mole
H₂: 1 mole

Being the molar mass of each compound:

Mg: 24.31 g/mole
HCl: 36.45 g/mole
MgCl₂: 95.21 g/mole
H₂: 2 g/mole

By reaction stoichiometry, the following mass amounts of each compound participate in the reaction:

Mg: 1 mole* 24.31 g/mole= 24.31 g
HCl: 2 moles* 36.45 g/mole= 72.9 g
MgCl₂: 1 mole* 95.21 g/mole= 95.21 g
H₂: 1 mole* 2 g/mole= 2 g

Then you can apply the following rule of three: if by stoichiometry 24.31 grams of Mg produces 2 grams of H₂, 12.5 grams of Mg produces how much mass of H₂?

$mass of H_{2} =\frac{12.5 grams of Mg* 2 grams of H_{2}}{24.31 grams of Mg}$

mass of H₂= 1.03 grams

1.03 grams of hydrogen is produced from 12.5 g of Mg reacting with hydrochloric acid.

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3 years ago

This nonmetal is in the same group as lead. What is the element

Andreyy89

Lead (/lɛd/) is a chemical element in the carbon group with symbol Pb (from Latin: plumbum) and atomic number 82.

~ I don't know if this will help, but I hope it does. ~

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4 years ago

How do scientists forecast space weather why?

slava [35]

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3 years ago