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3 years ago

A molar solution is a solution that contains one mole of solute in

Chemistry

1 answer:

BartSMP [9]3 years ago

7 0

Answer:

1 liter of the solution

Explanation:

Molarity or concentration of a solution refers to the number of moles of solute contained in a volume of 1 liter or 1 dm³ solution.
Therefore, the concentration of a solution is calculated by dividing the number of moles of a solute by the volume of the solution.
Concentration is given in mol/L or mol/dm³.
Hence, a molar solution is a solution that contains 1 mole of a solute in 1 liter of the solution. This is equivalent to 1M or 1 mol/L.

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Answer:

In paper chromatography, the wet moving edge of the solvent that progresses along the surface where the separation of the mixture is occurring.

Explanation:

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3 years ago

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4 years ago

PLEASE HELP!! WILL MARK BRAINLIEST

Andrew [12]

Answer:

The answer to your question is below

Explanation:

Trial 1 Trial 2

mass of Mg 0.255 g 0.353 g

mass of MgO 0.418 g 0.576 g

Chemical reaction

2Mg(s) + O₂(g) ⇒ 2MgO(s)

Question 1.

Atomic mass of Mg = 24.31 x 2 = 48.62 g

Molecular mass of MgO = 2(24.31 + 16) = 80.62 g

Trial 1

48.62 g of Mg ----------------- 80.62 g of MgO

0.255 g ---------------- x

x = (0.255 x 80.62)/48.62

x = 0.422 g of MgO

Trial 2 48.62 g of Mg ----------------- 80.62 g of MgO

0.353 g ---------------- x

x = (0.353 x 80.62)/48.62

x = 0.585 g of MgO

Question 2

Trial 1

Percent yield = 0.418/0.422 x 100 = 99%

Trial 2

Percent yield = 0.576/0.585 x 100 = 98.5%

Question 3

Average = (99 + 98.5)/2

= 98.75%

3 0

3 years ago

In the presence of dry sulfuric acid at 100 degree c, salicylic acid can react with itself to form a water-insoluble precipitate

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The side reaction will affect the purity and percent yield that, it will decrease the purity and also decrease the present yield.
Due to side reaction, the amount of aspirin which is being produced will be less for some amount of starting material which is used. The present yield will decrease. The insoluble water which is being precipitated is formed as a result of the side-reaction which will remain with aspirin and finally contaminate the aspirin.
The purity of aspirin will also decrease.

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3 years ago

For an enzyme that displays Michaelis-Menten kinetics, what is the reaction velocity, v(as a percentage of Vmax), observed at:a)

fiasKO [112]

Answer:

a) 50% of the maximum velocity

b) 33.33% of the maximum velocity

c) 9.09% of the maximum velocity

d) 66.66% of the maximum velocity

e) 90.9% of the maximum velocity

Explanation:

The Michaelis-Menten kinetis is represented by

v = Vmax*S/(Km+S)

where

v= reaction rate

S= Substrate's concentration

Vmax= maximum rate of reaction

Km= constant

a) for S=Km

v = Vmax*Km/(2Km) = Vmax/2

v/Vmax = 1/2= 50% of the maximum velocity

b) for S=Km/2

v = Vmax*(Km/2)/(3/2Km) = Vmax/3

v/Vmax = 1/3= 33.33% of the maximum velocity

c) for S= 0.1*Km=Km/10

v = Vmax*(Km/10)/(11/10Km) = Vmax/11

v/Vmax = 1/11= 9.09% of the maximum velocity

d) for S=2*Km

v = Vmax*(2*Km)/(3*Km) = (2/3)* Vmax

v/Vmax = 2/3 = 66.66% of the maximum velocity

d) for S=10*Km

v = Vmax*(10*Km)/(11*Km) = (10/11)* Vmax

v/Vmax = 10/11 = 90.9 % of the maximum velocity

7 0

4 years ago

A molar solution is a solution that contains one mole of solute in​

A molar solution is a solution that contains one mole of solute in