Find the molarity of a 450 mL solution containing 13.7 g of ZnSO4.

Answers

Answer 1

Answer:

Answer:

The molarity is 0.189 $(moles)/(liter)$

Explanation:

Molarity is a measure of concentration of a solution that indicates the number of moles of solute that are dissolved in a given volume. In other words, the molarity indicates the amount of moles of solute that appear dissolved in each liter of the mixture.

Molarity is determined by the expression:

$Molarity (M)=(number of moles of solute)/(Volume)$

Molarity is expressed in units ( $(moles)/(liter)$ ).

So, you need to know the amount of moles of ZnSO₄. Then you must know the molar mass. If:

Zn: 65 g/mol
S: 32 g/mol
O: 16 g/mol

the molar mass of ZnSO₄ is:

ZnSO₄= 65 g/mol + 32 g/mol + 4* 16 g/mol= 161 g/mol

Then you can apply a rule of three as follows: if 161 g of ZnSO₄ is contained in 1 mole, 13.7 g in how many moles are they?

$moles=(13.7 g*1 mole)/(161 g)$

moles=0.085

Then you know:

number of moles of solute= 0.085 moles
Volume= 450 mL (Being 1 L=1,000 mL)

Replacing in the definition of molarity:

$Molarity= (0.085 moles)/(0.45 L)$

Molarity=0.189 $(moles)/(liter)$

The molarity is 0.189 $(moles)/(liter)$

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Answers

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what would happen to the boiling point of water at 8000 above sea level, where the air pressure is lower?

Answers

Answer:

The boiling point will decrease to 73.3°C

Explanation:

Atmospheric pressure decreases with elevation and the boiling point of water is directly related to atmospheric pressure, it rapidly drops as elevation increases too, approximately 1°C for every 300 meters.

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80.8g of calcium contain hot many atoms?

Answers

Answer:

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H2SO4
Found in car batteries.
Element Name
Number of Atoms

Answers

Answer:

Sulfuric Acid (H₂SO₄) is a compound made from the elements: sulfur, oxygen and hydrogen. One molecule of sulfuric acid is made up of the following atoms:

Hydrogen (H) = 2

Sulfur (S) = 1

Oxygen (O) = 4

Total Atoms = 7

~Hope this helps!~

An empty party balloon will float to the ceiling of a room once it is filled with helium.A. What does this tell you about the density of air in the room compared to the density of helium?

B. For the balloon to float in air, what two factors might have changed about the balloon?

Answer those two questions of you know the answer.

Answers

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Two factors to change are Air pressure (due to the balloon moving ) and the helium making the balloon rise.

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