CHEMISTRY HIGH SCHOOL

A solution that contains a lower osmotic pressure than thecytoplasm of a cell is called

Answers

Answer 1
Answer: I'm relatively sure it's called hypotonic.

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HIGH SCHOOL

The discernible difference in length between the two x chromosomes of the female fruit fly was important in stern’s experiments because _______.

Answers

Hello there.

The discernible difference in length between the two x chromosomes of the female fruit fly was important in stern’s experiments because _______.

Answer: It was important because it allowed detection of physical exchange between the chromosomes in the experiment. 

Hope This Helps You!
Good Luck Studying ^-^
MIDDLE SCHOOL

Molecule Energy Released Glucose 4 kcal/gram
Sucrose 4 kcal/gram
Lipid 9 kcal/gram
Protein 4 kcal/gram

If you ate a jelly doughnut for breakfast, the majority of the energy would come from the _________ in the doughnut because it _________.
A) fat; contains a low ratio of oxygen atoms.
B) sugar; contains high ratio of oxygen atoms.
C) carbohydrate; contains a low ratio of oxygen atoms.
D) protein; contains nitrogen in place of oxygen atoms.

Answers

fats contian a low raito of oxgen atoms


Carbohydrate; contains a low ratio of oxygen atoms.
HIGH SCHOOL

What volume of a 9.00 M NaOH stock solution would you need to make 800. ML of a 0.750 M NaOH solution

Answers

Answer: 66.66 ml

Explanation: Using Molarity equation:

(stock solution)=(solution to be prepared)

given:

(stock solution)= (solution)

MIDDLE SCHOOL

When a liquid is heated, the temperature stops rising at the liquid’s ____________________.

Answers

Answer:

When liquid is heated, the temperature stops rising at the liquid's Boiling Point .

Explanation:

Boiling point is defined as the temperature at which  pressure applied by the surroundings upon a liquid is normalised by the pressure applied by the vapour of the liquid. Under this condition, heating of the liquid transforms the liquid into its vapour without raise in the temperature .

The pressure of the vapour increases when temperature is increased.  The liquid starts forming bubbles of vapour and  move towards the surface at its boiling point.  Based on the Pressure  applied  liquid have different boiling points.  Higher the altitude, lower the boilng point temperature.

Hi there,

the answer to the blank is: boiling point

When a liquid is heated, the temperature stops rising at the liquid's boiling point.

Hope this is correct :)

Have a great day

MIDDLE SCHOOL

The solubility of gas is 0.58 g/L at a pressure of 104 kPa. What is the solubility if it’s solubility pressure increases to 250 kPa at the same temperature?

Answers

Answer : The solubility of gas at pressure 250 kPa is, 1.39 g/L

Explanation:

According top the Henry's Law, the solubility of a gas in a liquid is directly proportional to the pressure of the gas.

or,

where,

= initial solubility of gas = 0.58 g/L

= final solubility of gas = ?

= initial pressure of gas = 104 kPa

= final pressure of gas = 250 kPa

Now put all the given values in the above formula, we get the final solubility of the gas.

Therefore, the solubility of gas at pressure 250 kPa is, 1.39 g/L

Converting to pascal
104/1000=0.104=P1
250/1000=0.25=P2
If 0.58=0.104
=0.25
Cross multiply
Solubility =[0.58*0.25]/0.104=1.39g/l

HIGH SCHOOL

Explain how the structure and bonding in bromine account for it's relatively low melting point. [3]

Answers

Bromine molecules have covalent bonding. Bromine molecule is stabilized by weak intermolecular forces of attraction such as van der Waals forces of attraction. van der Waals forces are result of creation of instantaneous dipoles caused by the uneven distribution of the electron cloud. The weak intermolecular forces of attraction account for the lower melting point of bromine.

Melting point is dependent on the intermolecular forces which means the bonds between the molecules of bromine as it is a simple molecular structure the intermolecular bonds of bromine are weak bcz they are weak vandervaal forces thats why Bromines melting point is low..In short when intermolecular bomds are weak the M.P is lower
COLLEGE

Which of the two substances would have the higher boiling point ch4 or c?

Answers

Carbon has a higher boiling point.
HIGH SCHOOL

A compound has a percent composition of 40.0% carbon , 6.72% hydrogen , and 53.28% oxygen . If it's molar mass is 180 g/mol , what is its molecular formula ?

Answers

1) Molar composition

Base: 100 g

C: 40.00 g / 12.0 g /mol = 3.333 mol

H: 6.72 g / 1 g/mol = 6.72 mol

O: 53.28 g / 16g/mol = 3.33 mol

2) Divide by the smaller number of moles

C: 3.333 / 3.33 = 1.00

H: 6.72 / 3.33 = 2.02 ≈ 2

O: 3.33/3.33 = 1.00

3) Empirical formula

CH2O

molar mass of the empirical formula = 12 g/mol + 2*1g/mol + 16 g/mol = 30 g/,ol

4) Number of times that the mass of empirical formula is contained in the molar mass = 180 g/mol / 30 g/mol = 6

5) Molecular formula = 6 times the empirical formula

=>C6H12O6

Answer: C6H12O6

HIGH SCHOOL

How much heat is required to increase the temperature of 198.5 grams of water from 25.0 c to 88.5 c the specific heat of water is 4.18 j/g x

Answers

The answer is 52, 700 j

Answer:

A) 52,700

Explanation:

Edmentum

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