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sergiy2304 [10]

2 years ago

8

3. Description of which organelle betul "Creates a physical barrier ;

1 answer:

Ghella [55]2 years ago

4 0

The cell membrane performs those functions. It is the outer layer of a cell and it creates a barrier, regulates material entry and exit, uses chemical signals, and creates structure.

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Why is physical exercise often suggested if you experience an abundance of stress?

scoray [572]

Answer:

good question

Explanation:

probably because people like to say they know things and help people with "there stress" and think that there helping them but in reality there making it where they have more :)

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3 years ago

A sample of nitrogen gas occupies a volume of 1.40L at 297K with a pressure of 776mmHg. The volume increases to 2.70L and the te

konstantin123 [22]

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3 years ago

Which scientist invented the first simple Microscope ?

Vinvika [58]

Answer:

D. Leeuwenhoek

Explanation:

6 0

3 years ago

Which statements would be expected to be true for Organesson? Select all that apply.

NISA [10]

Answer:It has the lowest effective nuclear charge of the four new elements.

5 0

2 years ago

a chemist dissolves 0.564 moles of manganese (IV) oxide (MnO2) in water, and adds enough water to make 0.510 L of solution. Calc

ladessa [460]

Answer:

The molarity of the solution is 1.1 $\frac{moles}{liter}$

Explanation:

Molarity is a measure of the concentration of that substance that is defined as the number of moles of solute divided by the volume of the solution.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

$molarity=\frac{number of moles of solute}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$

In this case

number of moles of solute= 0.564 moles
volume= 0.510 L

Replacing:

$molarity=\frac{0.564 moles}{0.510 L}$

Solving:

molarity= 1.1 $\frac{moles}{liter}$

<u><em>The molarity of the solution is 1.1 </em></u> $\frac{moles}{liter}$ <u><em></em></u>

4 0

2 years ago