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3 years ago

What would happen if this cell were moved from pure water to a seawater solution?

1 answer:

3 0

The cell would swell and burst, because the 20% salt solution is hypotonic with respect to the cell, causing a net movement of water into the cell. Example, water moves from the blood filtrate that will form urine. The same will do while pure water moved to seawater.

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A 14.3 g sample of HF is dissolved into 250 mL of solution. The concentration of the solution is *

STALIN [3.7K]

Answer:

The concentration of the solution is 2.86 M

Explanation:

Molarity is a unit of concentration based on the volume of a solution. It is defined as the number of moles of solute that are dissolved in a given volume. In other words, molarity is defined as the number of moles of solute per liter of solution.

The Molarity of a solution is determined by the following expression:

$Molarity (M)=\frac{number of moles of solute}{Volume}$

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

In this case, you must then know the number of moles of HF, for which you must know the molar mass. Being:

H: 1 g/mole
F: 19 g/mole

the molar mass of HF is: HF= 1 g/mole + 19 g/mole= 20 g/mole

Then the following rule of three applies: if 20 g of HF are available in 1 mole, 14.3 g in how many moles will they be?

$moles=\frac{14.3 g*1 mole}{20 g}$

moles= 0.715

So:

number of moles of solute: 0.715 moles
Volume: 250 mL=0.250 L (being 1 L=1000 mL)

Replacing:

$Molarity=\frac{0.715 moles}{0.250 L}$

Solving:

Molarity= 2.86 $\frac{moler}{liter}$ =2.86 M

The concentration of the solution is 2.86 M

6 0

2 years ago

Which has prokaryotic cells

Sergeeva-Olga [200]

An organism is said to have a prokaryotic cell if its cell is a very simple one that does not contain any true nucleus and which do not have membrane bound organelles. Prokaryotes are usually unicellular organisms, examples are bacteria. One key feature of prokaryotic cell is a piece of circular, double stranded DNA which is usually found in the cell.

5 0

3 years ago

Read 2 more answers

Write number then solution!!!!!!!!!!!

vivado [14]

Answer:

1- waxing gibbous

2- third quarter

3- waxing crescent

4- full moon

5- waning crescent

6- new moon

7- first quarter

8- waning gibbous

Explanation:

hope that helps

7 0

2 years ago

Read 2 more answers

What is the difference between test tube and boiling tube

mixer [17]

Test tubes heat small amounts of liquids while boiling tube boils liquids

5 0

2 years ago

HELP ME PLEASE. no links.

tatiyna

Answer:

Experimental group

Explanation:

i hopes this helps let me know if im wrong:)

4 0

3 years ago