Which method separates mixtures according to the rate that their components travel through a material? question 1 options: liquid chromatography filtration distillation electrolysis

Answer : The correct option is, liquid chromatography

Explanation :

Chromatography : It is a type of separation process in which the liquid or gas is separated into components at different rates.

Liquid chromatography is a type of chromatography.

Distillation : It is a type of separation process in which the mixture of liquid separated or evaporated at different temperatures.

Filtration : It is a type of mechanical separation process in which the solid is separated from the liquid through the filter paper.

Electrolysis : It is a type of process in which the chemical decomposition produced by passing an electric current through the solution that containing the ions.

Hence, from this we conclude that liquid chromatography is the method which separates mixtures according to the rate that their components travel through a material.

when 25.0 ml of 0.700 mol/l naoh was mixed in a calorimeter with 25.0 ml of 0.700 mol/l hcl, both initially at 20.0 °c, the temperature increased to 22.1 °c. the heat capacity of the calorimeter is 279 j/°c.

the equation for the reaction is:

naoh + hcl → nacl + h₂o

moles of hcl = 0.0250 l hcl ×

0.700

mol hcl

1 l hcl = 0.0175 mol hcl

volume of solution = (25.0 + 25.0) ml = 50.0 ml

mass of solution = 50.0 ml soln ×

1.00

ml soln

= 50.0 g soln

δt=t2-t1

= (22.1 – 20.0) °c = 2.1 °c

the heats involved are

heat from neutralization + heat to warm solution + heat to warm calorimeter = 0

q1+q2+q3=0

nδh+mcδt+cδt=0

0.0175 mol ×

δh

+ 50.0 g × 4.184 j·g⁻¹°c⁻¹ × 2.1 °c + 279 j°c⁻¹ × 2.1 °c = 0

0.0175 mol ×

δh

+ 439.32 j + 585.9 j = 0

0.0175 mol ×

δh

= -1025.22 j

δh=1025.22j0.0175 mol= -58 600 j/mol = -58.6 kj/mol

your answer is c) plasma

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