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olga2289 [7]
4 years ago
6

Why do plant cells have a cell wall in addition to a cell membrane?

Chemistry
1 answer:
garri49 [273]4 years ago
4 0

Answer:

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.

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A sample of gas occupies 40.0 mL at -123°C. What volume does the sample occupy at 27°C if the pressure is held constant? V1T2 =
Brums [2.3K]

Answer:

80mL

Explanation:

Step 1:

Data obtained from the question.

Initial Volume (V1) = 40mL

Initial temperature (T1) = –123°C

Final temperature (T2) = 27°C

Final volume (V2) =..?

Step 2:

Conversion of celsius temperature to Kelvin temperature.

T(K) = T(°C) + 273

Initial temperature (T1) = –123°C =

–123°C + 273 = 150K

Final temperature (T2) = 27°C = 27°C + 273 = 300K

Step 3:

Determination of the final volume.

This can be obtained as follow:

V1/T1 = V2/T2

Initial Volume (V1) = 40mL

Initial temperature (T1) = 150K

Final temperature (T2) = 300

Final volume (V2) =..?

V1/T1 = V2 /T2

40/150 = V2 /300

Cross multiply

150 x V2 = 40 x 300

Divide both side by 150

V2 = (40 x 300) /150

V2 = 80mL

Therefore, the new volume of the gas is 80mL

6 0
3 years ago
If you shake up different kinds or brands of soft drinks will they all spew you the same amount
Morgarella [4.7K]

Answer:

yeah and the point?

Explanation:

3 0
3 years ago
Read 2 more answers
What's the answer to the question in the picture??
Burka [1]

Answer:

B

Explanation:

3 0
4 years ago
A boy weighing kilograms is riding a skateboard. He’s moving at 2 meters/second and has 40 joules of kinetic energy. He doubles
tester [92]

Answer:

80 is the correct answer i think I'm not sure

8 0
3 years ago
How many atoms are in 15 grams of H2O
gulaghasi [49]

Answer:

5.014x10^23 atoms

Explanation:

first start with given over 1 so 15 over 1 then multiply that by 1 over 18.01528 and then multiply it by 6.022x10^23 over 1 which then gives you the answear hope this helps god bless

4 0
3 years ago
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