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3 years ago

How do you compare the nuclear membrane and the cell membrane?

Chemistry

2 answers:

Mademuasel [1]3 years ago

8 0

ANSWER:

they're both protective covering, the nuclear membrane is a covering for the nucleas while the cell membrane is the covering for the whole cell the nucleus (which is the control center of the cell) decides what comes in and out of the cell.

~batmans wife dun dun dun...aka ~serenitybella

iragen [17]3 years ago

5 0

A. Both the cell membrane and the nuclear membrane are protective coverings.

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How many atoms are in 0.0303 mol K?

Inga [223]

1.661x10 negative 24 squared

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3 years ago

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Answer:

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3 years ago

What is the concentration (in M) of a 225ml potassium sulfate solution that contains 4.15g of potassium?

mars1129 [50]

The concentration of solution in M or mol/L can be calculated using the following formula:

$C=\frac{n}{V}$ .... (1)

Here, n is number of moles and V is volume of solution in L.

The molecular formula of potassium sulfate is $K_{2}SO_{4}$ thus, there are 2 moles of potassium in 1 mol of potassium sulfate.

1 mol of potassium will be there in 0.5 mol of potassium sulfate.

Mass of potassium is 4.15 g, molar mass is 39.1 g/mol.

Number of moles can be calculated as follows:

$n=\frac{m}{M}$

Here, m is mass and M is molar mass

Putting the values,

$n=\frac{(4.15 g}{(39.1 g/mol}=0.1061 mol$

Thus, number of moles of $K_{2}SO_{4}$ will be $0.1061\times 0.5=0.053 mol$ .

The volume of solution is 225 mL, converting this into L,

$1 mL=10^{-3}L$

Thus,

$225 mL=0.225 L$

Putting the values in equation (1),

$C=\frac{(0.053 mol}{0.225 L}=0.236 M$

Therefore, concentration of potassium sulfate solution is 0.236 M.

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3 years ago

Which layer of Earth has partially melted material that moves the tectonic plates? Crust, Inner core, Mantle, Outer core

Elena L [17]

This question is very unspecific, but it is probably the Mantle. If that is wrong try Crust.<span />

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3 years ago

Read 2 more answers

What aqueous solution has the highest boiling point at standard pressure? A) 1.0 M KCl(aq) B) 1.0 M CaCl2(aq) C) 2.0 M KCl(aq) D

Lapatulllka [165]

The increase in the boiling point of a solvent is a colligative property.

That means that the increase in the boling point will be related to the number of particles (molecules or ions) present in the solution.

The higher the number of particles (molecules or ions) the higher the increase in the boiling point.

All the aqueous solutions presented are electrolytes, i.e. the solutes are ionic compounds.

Then, you have to compare the number of ions that you have in each solution.

A) 1.0 M KCl ---> 1.0 M K+ + 1.0 MCl- = 2 moles of particles / liter

B) 1.0 M CaCl2 --> 1.0M Ca(2+) + 1.0M * 2 Cl (-) = 3 moles of particle / liter

C) 2.0M KCl ---> 2.0 M K+ + 2.0 M Cl- = 4 moles of particle / liter

D) 2.0 M CaCl2 ----> 2.0 M Ca (2+) + 2.0M * 2 Cl (-) = 6 moles of particle / liter.

Then, the solution 2.0M CaCl2(aq) has the highest increase in the boiling point.

Answer: option D) 2.0 M Ca Cl2(aq)

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4 years ago