All categories

3 years ago

Help please 20points

Chemistry

2 answers:

lions [1.4K]3 years ago

6 0

Answer:

Explanation:

D is the answer because this is the only one having to do with genetics. Fox's genetics changed because it's environment changed.

Anvisha [2.4K]3 years ago

6 0

The answer is D, it is the only answer that relates to genes.

You might be interested in

When two metals touch in the mouth, a small shock is created. this is known as<br> a?

Over [174]

<span>When two metals touch in the mouth, a small shock is created. this is known as a </span>galvanic action

7 0

3 years ago

What provides great Britan with a moderate climate

Fynjy0 [20]

The Gulf Stream affects the climate in Britain by bringing warm water from the Caribbean to North West Europe. This keeps the climate in Britain warmer than other places at a similar latitude.

3 0

2 years ago

1. Ibuprofen (C13H18O2) is the active ingredient in many nonprescription pain relievers. Each tablet contains 200 mg of ibuprofe

Dmitry_Shevchenko [17]

Answer :

The molar mass of ibuprofen is, 206.29 g/mole.

The number of moles of ibuprofen in a single tablet is, 0.000969 moles

The number of moles of ibuprofen in four doses is, 0.007752 moles

Solution : Given,

Molar mass of carbon = 12.01 g/mole

Molar mass of hydrogen = 1.01 g/mole

Molar mass of oxygen = 15.99 g/mole

1) Now we have to calculate the molar mass of ibuprofen.

Molar mass of ibuprofen, $C_{13}H_{18}O_2$ = $(13\times 12.01)+(18\times 1.01)+(2\times 15.99)=206.29g/mole$

The molar mass of ibuprofen = 206.29 g/mole

2) Now we have to calculate the moles of ibuprofen.

Formula used : $Moles=\frac{Mass}{\text{ Molar mass}}$

Given : Mass of ibuprofen = 200 mg = 0.2 g (1 mg = 1000 g)

$\text{ Moles of ibuprofen}=\frac{\text{ Mass of ibuprofen}}{\text{ Molar mass of ibuprofen}}=\frac{0.2g}{206.29g/mole}=0.000969moles$

The moles of ibuprofen = 0.000969 moles

3) Now we have to calculate the number of moles of ibuprofen for four doses.

Number of tablets in one dose = 2

Total number of tablets in 4 doses = 4 × 2 = 8

Number of moles of ibuprofen in 8 tablets =

$\text{ Number of moles of ibuprofen in 1 tablet}\times \text{ Total number of tablets}=0.000969\times 8=0.007752moles$

6 0

3 years ago

Read 2 more answers

PLEASE HELP I HAVE TO DO THIS BENCHAMRK QUESTION!!!

GuDViN [60]

PLEASE HELP I HAVE TO DO THIS BENCHAMRK QUESTION!!!

The chart shows parts of a plant and an animal, at different levels of organization. Consider the plant images. If we are referring to levels of organization in a plant which picture can BEST be used to fill in box Y?

first picture (A

8 0

3 years ago

NaOH is a strong base. Which two ions do you expect to find in a solution of NaOH?

Elena L [17]

NaOH will dissociate as Na+ and OH- in the solution.

5 0

3 years ago