All categories

3 years ago

3. When substances cross cell membranes by simple diffusion, they

Chemistry

1 answer:

poizon [28]3 years ago

3 0

Answer:B

Explanation:due to osmosis and osmoregulation of the cell membrane

You might be interested in

(23.4m)(14m) rounded off to the correct number of significant figures

VARVARA [1.3K]

The value of the given expression up to correct significant figures is $330 m^2$ .

The rule that applies for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The rule that applies for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

Given:

The expression: (23.4m)(14m)

To find:

The answer up to correct a number of significant figures.

Solution

Number of significant figures in '23.4' = 3

Number of significant figures in '14' = 22

$=(23.4m)(14m)\\=(23.4m)\times (14m)\\=327.6 m^2$

The number with the least significant figures is '14' is 2, so the answer will be reported up to 2 significant figures:

$=327.6 m^2\approx 330 m^2$

Number of significant figures in '330' = 3

The value of the given expression up to correct significant figures is $330 m^2$ .

Learn more about significant figures here:

brainly.com/question/11904364?referrer=searchResults

brainly.com/question/17177568?referrer=searchResults

5 0

3 years ago

A cup of hot tea _____.

sergij07 [2.7K]

Answer:

whats the answer choices

Explanation:

4 0

3 years ago

Read 2 more answers

what pressure in N/m2 would be exerted if a 65 kg person were sitting on a stool with a seat diameter of 12 inches?

yaroslaw [1]

d = diameter of the seat = 12 inch

we know that , 1 inch = 0.0254 m

hence

d = diameter of the seat = 12 inch = 12 (0.0254) m = 0.305 m

r = radius of seat = diameter/2 = d/2 = 0.305/2 = 0.1525 m

A = area of seat = πr²

m = mass of the person = 65 kg

g = acceleration due to gravity = 9.8 m/s²

F = force due to weight of person on the seat = mg

pressure on the seat is given as

P = F/A

P = mg/A

P = mg/(πr² )

inserting the values

P = (65 x 9.8)/((3.14) (0.1525)²)

P = 8723.1 N/m²

7 0

3 years ago

Can anyone help me with this? Even just a few answers would be helpful. I'm struggling a little bit

Zepler [3.9K]

CaO is Calcium Oxide and is Ionic

7 0

3 years ago

Which statement best describes the polarity of CH3Cl? a) The molecule is always polar. b) The molecule is always nonpolar. c) De

Solnce55 [7]

Answer:

a) The molecule is always polar.

Explanation:

The molecule is always polar because of two reasons:

all the bonds are polar due to the difference in electronegativity between carbon and hydrogen & carbon and chlorine.

AND IMPORTANTLY

The molecule is asymmetrical meaning that the dipoles cannot cancel each other out (like they do in methane or carbon dioxide for example) so the net effect is a polar molecule.

7 0

3 years ago