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zaharov [31]
2 years ago
5

How many miles of MgCI2 are there in 345 g of the compound?

Chemistry
1 answer:
Valentin [98]2 years ago
8 0
MgCl2
Mg=24
Cl=35.5×2 = 71
rmm= 71+24=95g
1 mole = molar mass
1 mole = 95g
1g = 1/95 moles
345g= 1/95 × 345
3.6 moles
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10 x 70 = 100 x Part, or

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Now, divide by 100 and get the answer:

Part = 700 / 100 = <span>7</span>

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At one time in the Earth’s history, many people thought the world was flat. Which best explains why the model of the Earth is no
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One mole of a metallic oxide reacts with one mole of hydrogen to produce two moles of the pure metal
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Answer:

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Match the following aqueous solutions with the appropriate letter from the column on the right. 1. 0.13 m FeCl3 A. Highest boili
Anestetic [448]

Answer:0.30 m KI ---- A. Highest boiling point

0.19 m Mg(CH3COO)2 ---- B. Second highest boiling point

0.53 m Glucose(nonelectrolyte) ---- Third highest boiling point-C

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Explanation:

Using the  boilng point elevation formula

ΔTb=m* kb *i

where m= molality

kb= elevated boiling point constant( here kb values will be same for all soluton)

i= vant hoff factor = number of ions present in a solution

Using the  number of ions and molarity present in a solution as a collagative property, since kb is constant, we can determine which of the species has the highest boiling point.

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2) 0.19 m Mg(CH3COO)2 = Mg²⁺ + CH₃COO⁻

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4. 0.53 m Glucose(nonelectrolyte) =

i= 1 for nonelectroytes

ΔTb=m* kb* i = molarity x number of ionsx Kb= 0.53 x 1= 0.53Kb

therefore,

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0.19 m Mg(CH3COO)2 ---- B. Second highest boiling point

0.53 m Glucose(nonelectrolyte) ---- Third highest boiling point

0.13 m FeCl3---- Lowest boiling point

3 0
3 years ago
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