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lina2011 [118]
3 years ago
15

What would be the resulting molarity of a solution made by dissolving 45.7 grams of Mg(OH)2 in enough water to make a 1087-milli

liter solution? Show all of the work needed to solve this problem
Chemistry
2 answers:
Tom [10]3 years ago
7 0

<u>Answer:</u> The molarity of the solution is 0.72 M

<u>Explanation:</u>

Molarity is defined as the number of moles present in one liter of solution.

Mathematically,

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

We are given:

Mass of magnesium hydroxide = 45.7 g

Molar mass of magnesium hydroxide = 58.32 g/mole

Volume of solution = 1087 mL

Putting values in above equation, we get:

\text{Molarity of the solution}=\frac{45.7\times 1000}{58.32\times 1087}=0.72M

Hence, the molarity of the solution is 0.72 M

liq [111]3 years ago
3 0
Molar mass Mg(OH)2 = <span>58.3197 g/mol

Number of moles:

45.7 / 58.3197 => 0.7836 moles

Volume = 1087 / 1000 => 1.087 L

Therefore:

Molarity = moles / volume

Molarity = </span>0.7836 / 1.087

=> 0.7208 M

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IceJOKER [234]

Answer:but-1-ene

Explanation:This is an E2 elimination reaction .

Kindly refer the attachment for complete reaction and products.

Sodium tert-butoxide is a bulky base and hence cannot approach the substrate 2-chlorobutane from the more substituted end and hence major product formed here would not be following zaitsev rule of elimination reaction.

Sodium tert-butoxide would approach from the less hindered side that is through the primary centre and hence would lead to the formation of 1-butene .The major product formed in this reaction would be 1-butene .

As the mechanism of the reaction is E-2 so it will be a concerted mechanism and as sodium tert-butoxide will start abstracting the primary hydrogen through the less hindered side simultaneously chlorine will start leaving. As the steric repulsion in this case is less hence the transition state is relatively stabilised and leads to the formation of a kinetic product 1-butene.

Kinetic product are formed when reactions are dependent upon rate and not on thermodynamical stability.

2-butene is more thermodynamically6 stable as compared to 1-butene  

The major product formed does not follow the zaitsev rule of forming a more substituted alkene as sodium tert-butoxide cannot approach to abstract the secondary proton due to steric hindrance.

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3 years ago
What is the molarity of 5.63 moles of lithium in 3.25 liters of solution
luda_lava [24]

Answer:

1.73 Molar

Explanation:

The formula is Molarity=moles of solute/liters of solution, which can be written in whatever way you prefer, and examples include: M=N/V or M=mol/L.

M=N/V

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Divide 5.63 by 3.25. When you calculate this, you get 1.73, therefore your answer is 1.73 molar.

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