All categories

3 years ago

Pls answer this two ASAP PLSSSSSSSS

Chemistry

1 answer:

d1i1m1o1n [39]3 years ago

4 0

Answer:

1. aa

2. They have similar DNA

Explanation:

1. According to the question 1, wrinkled seeds (A) are dominant over round seeds (a) in pea plants. This means that, based on the law of dominance proposed by Mendel, wrinkled seeds will be expressed over round seeds in a heterozygous state (Aa).

However, since the round seed phenotype is a recessive trait, it will only be expressed when the alleles for round seeds (a) are the same in the gene i.e. aa genotype.

2. Based on the information in question 2, Ricky, who is working on a family tree for his school project, realizes that his close relatives all look similar in the pictures he collected. This is possible because of the SIMILARITY OF THEIR DNA (genetic material). Note that, relatives are connected by the genes that are inherited from one another, hence, they possess a similar DNA, which is the most valid reason for the resemblance.

You might be interested in

PLEASE HELP 30 POINTS PLS PLS

joja [24]

22-yes, they belong to the same group
23- they are metals
24-Atoms of group 1 elements all have one electron in their outer shell. This means Na and K have the same valence electrons.
25-Metals are solids at room temperature, therefore Na and K are solid.
26- mass number=A=235
Protons=z=92
Neutrons=mass number-protons
Neutrons=A-Z
Neutrons=235-92
Neutrons=143

8 0

3 years ago

The vapor pressure of pure pentane and pure hexane are 425 torr and 151 torr respectively. equal moles of pentane and hexane are

nadezda [96]

The mole fraction of pentane in the vapor is 0.291

Vapour pressure rises with temperature and is a measurement of a substance's propensity to transform into a gaseous or vapour state. The boiling point of a liquid is the temperature at which the pressure exerted by its surroundings equals the vapour pressure present at the liquid's surface.

The number of moles of a particular component in the solution divided by the overall number of moles in the sample solution is known as the mole fraction.

Using the formula for vapour pressure,

vapour pressure = $P^{}$ ° $_{hex}$ × $X_{hex}$ + $P^{}$ ° $_{pen}$ × $X_{pen}$

vapour pressure = 151 × $(1-$ $X_{pen}$ $)$ + 425 × $X_{pen}$

240 = 151 - 151 $X_{pen}$ + 425 $X_{pen}$

240 - 151 = - 151 $X_{pen}$ + 425 $X_{pen}$

89 = 274 $X_{pen}$

$\frac{89}{274}$ = $X_{pen}$

0.291 = $X_{pen}$

Therefore, the mole fraction of pentane in the vapor is 0.291

Learn more about vapour pressure here;

brainly.com/question/25699778

#SPJ4

3 0

2 years ago

A chemist prepares a solution of silver nitrate by measuring out of silver nitrate into a volumetric flask and filling the flask

Snezhnost [94]

Amount of silver nitrate taken = 269.μmol $AgNO_{3}$

Volume of the solution = 300. mL

Concentration of a solution is generally expressed in terms of molarity. Molarity is defined as the moles of a substance present per liter of the solution.

$Molarity = \frac{Moles of solute}{Volume of solution(L)}$

We want the concentration in millimoles/L.

Converting μmol to millimol solute:

$269.$ μ $mol * \frac{1 millimol}{1000 micromol}$ = 0.269 millimol

Volume from mL to L: $300. mL * \frac{1 L}{1000 mL} = 0.300 L$

Therefore concentration of the chemist's solution = $\frac{0.269 millimol}{0.300 L} = 0.897 \frac{millimol}{L}$

8 0

3 years ago

Combustion of methanol displayed formula???

Andrew [12]

Answer:

reee, here is your answer.

Explanation: CH3OH(l) + 3O2(g) rightarrow CO2(g) + 3H2O(g) CH3OH(l) + O2(g) rightarrow CO2(g) + 2H20(g) CH3OH(l) + 2O2(g) rightarrow 2CO2(g) + 4H20(g) 2CH3OH(l) + 3O2(g) rightarrow 2CO2(g) + 4H20(g) Correct Calculate Delta H degree rxn at 25 degree C.

6 0

3 years ago

Which products were produced or raised in large amounts on the prairie?

slavikrds [6]

The correct answer is, tobacco.

3 0

3 years ago

Read 2 more answers