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1 year ago

Lake Baikal in Siberia is the largest freshwater body on Earth by volume, at 5666 mi³

Chemistry

1 answer:

Drupady [299]1 year ago

6 0

largest freshwater body on Earth by volume, at 5666 mi³

1 mi³= 4.168 × 10^12 L

5666 mi³ = 5666 × 4.168 × 10^12 L

volume = 2.362 × 10^16 L

volume is the amount of space an object take up or in other word measure of the size of a body or region in three-dimensional space occupied by an object L x W x H
Liquid volume metric base unit is liter(L)
cubic centimeters is basic unit for measuring the volume of solids and gases
maximum volume occupied by gases and minimum volume occupied by solid and liquid comes between them

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The following information was recorded by a student team working to prepare nickel sulfate. Plan: Prepare NiSO4 by reacting NiO

mixas84 [53]

Answer:

The options e and d are correct.

Explanation:

Mass of NiO = 7.5 g

Moles of NiO = $\frac{7.5 g}{74.69 g/mol}=0.10 mol$

Moles of sulfuric acid = n

Volume of sulfuric acid ,V= 50 mL = 0.050 L

Molarity of sulfuric acid ,M = 6 mol/L

$n=M\time V=6mol/L\times 0.050 L =0.3 mol$

$NiO + H_2SO_4\rightarrow NiSO_4 + H_2O$

According to reaction, 1 mole of NiO reacts with 1 mole of sulfuric acid.

Then 0.10 moles of NiO reacts with :

$\frac{1}{1}\times 0.10 mol/=0.10 mol$ of sulfuric acid.

As we can see that sulfuric acid is in excess amount, so the amount of the product will depend upon amount of NiO.

According to reaction, 1 mole of NiO gives with 1 mole of $NiSO_4$ .

Then 0.10 moles of NiO wil give :

$\frac{1}{1}\times 0.10 mol/=0.10 mol$ of $NiSO_4$ .

Molar mass of $NiSO_4$ = 154.75 g/mol

Mass of 0.10 moles of $NiSO_4$ :

= 154.75 g/mol × 0.10 mol = 15.475 g

Theoretical mass of $NiSO_4$ = 15.475 g

Experimental yield of $NiSO_4$ = 17.4 g

Percentage yield :

$\Yield=\frac{\text{Experimental mass}}{\text{Theoretical mass}}\times 100$

Percentage yield of $NiSO_4$ :

$\Yield=\frac{17.4}{15.475 g}\times 100=112\%$

Moles of $NiSO_4.6H_2O$ = 262.85 g/mol × 0.10 mol = 26.285 g

Experimental yield of $NiSO_4.6H_2O$ = 17.4 g

Percentage yield of $NiSO_4.6H_2O$ :

$\Yield=\frac{17.4}{26.285 g}\times 100=66.2\%$

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3 years ago

Balance the equation ____Mg+_____HNO3=____Mg(NO3)2+H2

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Explanation:

2Mg⁺ 2HNO₃ = Mg(NO₃)₂ + H₂

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3 years ago

The elements in any blank in periodic table have similar physical and chemical properties

Yakvenalex [24]

Elements in the same group have similar properties

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4 years ago

A(n) ______________ is an organism that lives on another organism and causes harm to that organism

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Answer: The answer is Parasite ma dude

Explanation:

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What type of reaction takes place between propene and chlorine? Write down the chemical equation for this reaction.

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Answer:

electrophilic addition

Explanation:

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