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Dafna1 [17]
3 years ago
8

When a cell is in a solution where the concentration of solute is the same in the cell as in the solution, the solution is calle

d?
Chemistry
1 answer:
Elodia [21]3 years ago
7 0
The answer to this question would be: isotonic

An isotonic solution has a same tonicity/concentration to the cell. This kind of solution will not cause osmosis to occur so it wouldn't shrink or swell the cells. This is why an isotonic solution is safer for the cells. The normal saline solution is isotonic to human cells and used frequently in medicine to replace body fluid.
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Three things about the body systems?
makvit [3.9K]

Answer:

Three things about our body's systems:

All systems have a method of self-regulation or exogenous regulation by other systems.

All systems have a balance in their functions.

All the systems of our organism are intertwined with each other thus giving general vitality.

Explanation:

Best known systems:

Renal, respiratory, circulatory, cardiac, nervous, immune, blood, muscular systems.

All of them include the participation of one or more organs

5 0
3 years ago
A sucrose solution is prepared to a final concentration of 0.250 M . Convert this value into terms of g/L, molality, and mass %.
MArishka [77]

Answer:

A. 85.6 g

= 0.0856 kg.

B. 0.00027 mol/g

= 0.27 mol/kg.

C. 8.39 %

Explanation:

Given:

Molar concentration = 0.25 M

Molar weight of sucrose = 342.296 g/mol

Density of solution = 1.02 g/mL

Mass of water = 934.4 g.

Density in g/l = 1.020 g/ml * 1000ml/1 l

= 1020 g/l

Mass of solution in 1 l of solution = 1020 g

Mass of solution = mass of solvent + mass of solute

Mass of sucrose = 1020 - 934.4

= 85.6 g of sucrose in 1 l of solution.

A.

Density of sucrose = mass/volume

= molar mass/molar concentration

= 342.296 * 0.25

= 85.6 g/l

Number of moles = mass/molar mass

= 85.6/342.296

= 0.25 mol

B.

Molality = number of moles of solute/mass of solvent

= 0.25/934.4

= 0.00027 mol/g

C.

% mass of sucrose = mass of sucrose/total mass of solution * 100

= 85.6/1020 * 100

= 8.39 %

6 0
3 years ago
What is the total number of atoms in a 75 g sample of zinc?
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How many molecular orbitals would be present in a molecule with the formula: ch2o?
Zigmanuir [339]
There are two molecular orbitals in the CH2O or formaldehyde. These are designated by the two types of bonding involved. The first is the sigma bonding. It is the head-on overlap of electrons of the C and H atoms. The second molecular orbital is formed from the pi orbital bonding. This is a sideway overlap of electrons between C-O bonding.
7 0
3 years ago
What is the empirical formula of a compound containing 90 grams carbon, 11 grams hydrogen, and 35 grams nitrogen? (5 points)
konstantin123 [22]
C3 H4 N1 ~~that’s what I think
8 0
3 years ago
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