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3 years ago

What happens to shape of cells when placed in hypertonic salty solutions

1 answer:

3 0

When a red blood cell is placed in a hypertonic solution, it shrinks as water is drawn
 cells change size when placed in solution with different salt concentration is due

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Four hundred and fifty two

marin [14]

Answer: 6.65 bullfrogs per square

kilometer

Explanation:

The formula to calculate the population density will be:

= N/A

where,

N = total population = 452

A = land area = 68km²

Therefore, population density will be:

= N/A

= 452/68

= 6.65 bullfrogs per square

kilometer

7 0

3 years ago

How many grams of nitric acid HNO₃, are required to neutralize (completely react with) 4.30 grams of Ca(OH)2 according to the ac

Brrunno [24]

Answer:

7.32g of HNO3 are required.

Explanation:

1st) From the balanced reaction we know that 2 moles of HNO3 react with 1 mole of Ca(OH)2 to produce 2 moles of H2O and 1 mole of Ca(NO3)2.

From this, we find that the relation between HNO3 and Ca(OH)2 is that 2 moles of HNO3 react with 1 mole of Ca(OH)2.

2nd) This is the order of the relations that we have to use in the equation to calculate the grams of nitric acid:

• starting with the 4.30 grams of Ca(OH)2.

• using the molar mass of Ca(OH)2 (74g/mol).

• relation of the 2 moles of HNO3 that react with 1 mole of Ca(OH)2 .

• using the molar mass of HNO3 (63.02g/mol).

$4.30g\text{ Ca\lparen OH\rparen}_2*\frac{1\text{ mol Ca\lparen OH\rparen}_2}{74g\text{ Ca\lparen OH\rparen}_2}*\frac{2\text{ moles HNO}_3}{1\text{ mole Ca\lparen OH\rparen}_2}*\frac{63.02g\text{ HNO}_3}{1\text{ mole HNO}_3}=7.32g\text{ HNO}_3$

So, 7.32g of HNO3 are required.

4 0

2 years ago

Answer the following questions.

CaHeK987 [17]

Answer:

Q1: Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Q2: Mass is how much stuff something is made of. Volume is how much space an object takes up.

8 0

3 years ago

A Punnett square without the genotypes of the parents is shown below.

hammer [34]

Answer:

Genotype of parents is CC and Cc

Explanation:

Please see the attachment

8 0

3 years ago

Which was a testable idea that J.J. Thomson developed through his experiments?

LenaWriter [7]

Atoms contains small, negatively charged particles. His experiment showed that an atom contains negatively charged particles which was later known as electrons. This was confirmed by the Cathode Ray Experiment he conducted.

3 0

3 years ago

Read 2 more answers