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3 years ago

PLEASE HELP!

Chemistry

2 answers:

Firlakuza [10]3 years ago

7 0

Answer:

The number of particles able to undergo a chemical reaction is less than the number that is not able to.

Explanation:

took test

Flauer [41]3 years ago

4 0

Answer:

option 2 and 4 are most likely to happen but I could be wrong

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in a simulation mercury removal from industrial wastewater, 0.020 L of 0.10 M sodium sulfide reacts with 0.050 L of 0.010 M merc

Margarita [4]

Answer: 0.1161 grams of mercury(II) sulfide) form.

Explanation:

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in L)}}$ .....(1)

a) Molarity of $Na_2S$ solution = 0.10 M

Volume of solution = 0.020 L

Putting values in equation 1, we get:

$0.10M=\frac{\text{Moles of }Na_2S}{0.020L}\\\\\text{Moles of Na_2S}={0.10mol/L\times 0.020}=0.002mol$

$\text {Moles of}Na_2S=0.10M\times 0.020L=0.002mol$

b) Molarity of $Hg(NO_3)_2$ solution = 0.010 M

Volume of solution = 0.050 L

Putting values in equation 1, we get:

$0.010M=\frac{\text{Moles of }Hg(NO_3)_2}{0.050L}\\\\\text{Moles of }Hg(NO_3)_2={0.010mol/L\times 0.050}=0.0005mol$

$Na_2S+Hg(NO_3)_2\rightarrow HgS+2NaNO_3$

According to stoichiometry :

1 mole of $Hg(NO_3)_2$ reacts with 1 mole of $Na_2S$

Thus 0.0005 moles of $HgNO_3$ reacts with= $\frac{1}{1}\times 0.0005=0.0005$ moles of $Hg(NO_3)_2$

Thus $Hg(NO_3)_2$ is the limiting reagent and $Na_2S$ is the excess reagent.

According to stoichiometry :

1 mole of $Hg(NO_3)_2$ forms= 1 mole of $Hg_2S$

Thus 0.0005 moles of $Hg(NO_3)_2$ forms= $\frac{1}{1}\times 0.0005=0.0005$ moles of $Hg_2S$

mass of $H_2S=moles\times {\text {Molar mass}}=0.0005mol\times 232.2g/mol=0.1161g$

Thus 0.1161 grams of mercury(II) sulfide) form.

5 0

3 years ago

When an acid and base combine, they react chemically. the result is water and a(n) ___

Ksivusya [100]

Mixing a base with an acid results in a chemical reaction called neutralization. The result is a perfectly balanced solution of salt and water with a pH of 7 if the acid and base are balanced properly. Depending on the bases and acids used, it can be a dangerous experiment.

Hope I helped you lots!! :3

5 0

3 years ago

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Which statement best explains why heating a liquid affects its viscosity?

mylen [45]

The statement that best explains why heating a liquid affects its viscosity is that "The molecules move faster at higher temperatures and overcome attractions more easily.". Remember that viscosity is a physical property of the fluids that measure the resistance (opposition) to flow and it, generally decreases, as the temperature increases and the intermolecular force decrease.

4 0

2 years ago

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Draw the Lewis structure for sulfur tetrafluoride, SF4

Vlad [161]

Notes:-

S has Z=16

Electronic configuration

1s²2s²2p⁶3s²3p⁴

Valency is 4 and 6

Three fluorine atoms take 3 electrons and one lone pair present over S
As one electron remains unshared so we use + sign .

6 0

2 years ago

What is the compound name of Ba3N?

eimsori [14]

The compound name of Ba3N is Barium Nitrate.

Explanation:

A compound name is a combination of two or more than two elements that are bonded together giving a compound form.
Barium Nitrate is a combination of two elements barium and nitrate which tends to bond together forming a compound.
Barium nitrate is the inorganic compound with the chemical formula Ba(NO₃)₂. It is colorless, toxic, and water-soluble.
It is more dangerous when it is exposed to fire, there will be an explosion irritating to eye and skin. Toxic oxides of nitrogen produced in fires.
It has a molecular weight of 261.34 g / mol and has a molecular formula of Ba(NO₃)₂.

4 0

3 years ago