Chemistry, 11.01.2021 17:50 cluis811

In rabbits, black fur (B) is dominant to white fur (b). A black fur male rabbit (BB) mates with a black fur female rabbit (Bb). Using the Punnett Square below, answer the following questions. 1. What is the probability of the offspring having black fur?

2. What is the probability of the offspring having white fur?

In rabbits, black fur (B) is dominant to white fur (b). A black fur male rabbit (BB) mates with a b

Answers: 3

Show answers

Answers

Answer from: Quest

It's a

Answer from: Quest

It could possibly be beneficial if the experiment is successful.

Answer from: Quest

the missing options are :

(1) lower boiling point and a lower freezing point(2) lower boiling point and a higher freezing point(3) higher boiling point and a lower freezing point(4) higher boiling point and a higher freezing point

answer : the correct answer is option (3) higher boiling point and a lower freezing point

explanation :

when a non volatile solute is added to a solvent like water, it results in elevation of boiling point.

let us find the increase in boiling point of water when cacl₂ is added to water to make a solution of 1 m

step 1 : find molality of the solution

let us assume we have 1 l of solution.

$m = \frac{moles (solute)}{l ( solution)}$

$1 m = \frac{moles (cacl_{2})}{1 l }= 1 mol cacl_{2}$

let us convert this to grams of cacl₂.

molar mass of cacl2 is 111 g/mol

grams of cacl₂ = $1 mol \times \frac{111g}{mol} = 111 g cacl_{2}$

mass of solute = 111 g

assuming density of solution same as water which is 1g/ml we have ,

mass of solution = density * volume

mass of solution = $\frac{1g}{ml} \times 1000 ml = 1000 g$

mass of solution = mass of solvent + mass of solute

mass of solute = 1000g - 111g

mass of solute 889 g = 0.889 kg

the molality of the solution can be calculated as

$molality = \frac{mol (solute)}{kg ( solvent)}$

$molality = \frac{1mol}{0.889kg}$

molality = 1.12 m

step 2 : find boiling point elevation.

the elevation in boiling point is calculated as

$\bigtriangleup t_{b} = i \times k_{b} \times m$

here δtb = boiling point elevation

i = vant hoff factor which is the number of ions formed by the solute .

cacl₂ dissociates as $cacl_{2} \rightarrow ca^{2+} + 2 cl^{-}$

it forms 3 ions . therefore,

i = 3

m = molality which is 1.12 m

kb is constant for a given solvent. for water it is 0.512

$\bigtriangleup t_{b} = 3 \times 0.512 \times 1.12$

$\bigtriangleup t_{b} = 1.7$

the boiling point of water increases by 1.7 °c

step 3: find freezing point depression.

when a non volatile solute is added to water, it results in decrease in freezing point.

the formula to find freezing point depression is

$\bigtriangleup t_{f} = i \times k_{f} \times m$

kf is constant for water and its value is 1.86

$\bigtriangleup t_{f} = 3 \times 1.86 \times 1.12$

$\bigtriangleup t_{f} = 6.2$

the freezing point of water decreases by 6.2 °c

therefore we can say that, the solution will have a higher boiling point and a lower freezing point

Answer from: Quest

A) it is neutral because the concentration of hydronium ions equals that of hydroxide ions

Another question on Chemistry

Chemistry, 22.06.2019 04:00

The rules of engagement (roe) working group is often used to (select all that apply.)

Answers: 2

Answer

Chemistry, 23.06.2019 04:00

Achemical reaction is done in the setup shown , resulting in a change of mass. what will happen if the same reaction is done in a sealed container that is placed on the electronic balance?

Answers: 2

Answer

Chemistry, 23.06.2019 16:00

Which part of the mantle is similar to the crust ? (science)

Answers: 3

Answer

Chemistry, 23.06.2019 22:00

What is the solubility of nano3 at 30 c?

Answers: 1

Answer

You know the right answer?

In rabbits, black fur (B) is dominant to white fur (b). A black fur male rabbit (BB) mates with a bl...