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RideAnS [48]
3 years ago
6

Water will always move from ________ areas to ________ areas, if the membrane is permeable to water. isotonic, hypotonic hyperto

nic, hypotonic hypertonic, isotonic hypotonic, hypertonic
Chemistry
2 answers:
ryzh [129]3 years ago
4 0

Answer:

From hypotonic to hypertonic

Explanation:

Water diffusion is a phenomenon that occurs when a solute (eg. a salt) is present in different concentrations in different areas. Because the <em>concentration is inversely proportional to volume </em>(meaning that the higher the volume, the lower the concentration), water will move from areas with lower concentration <u>(hypotonic)</u> to areas with higher concentration <u>(hypertonic)</u>, so as to match the concentrations.

docker41 [41]3 years ago
4 0

Answer:

Water will move from hypotonic to hypertonic solutions

Explanation:

When a hypotonic solution is separated by a permeable membrane from another solution with more solute (hypertonic), water will move across the membrane until both solutions have the same concentration: when water comes into the compartment with hypertonic solution, this solute dissolves.

Water will not move from hypertonic to hypotonic without energy addition.

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What is an atom that has the same number of protons as other atoms of the same element, but has a different number of neutrons?
PSYCHO15rus [73]

Answer:

isotopes

Atoms with the same number of protons but different numbers of neutrons are called isotopes. Because the number of neutrons can vary for a given element, the mass numbers of different atoms of an element may also vary. For example, some helium atoms have three neutrons instead of two (these are called isotopes and are discussed in detail later on)

Explanation:

4 0
3 years ago
The reactants in a chemical reaction contain 900 J of chemical energy. The products of the reaction contain 9000 J of chemical e
Agata [3.3K]

Answer:The reaction absorbs 8100 J of energy from the surroundings as it proceeds.

Explanation:

7 0
3 years ago
Read 2 more answers
20 POINTS 2 QUESTIONS CAN YOU ANSWER THEM ???
olasank [31]
The correct options are as follows:
1. A.
A synthesis reaction is a type of reaction in which two or more reactants combine together to form only one product. Synthesis reaction always release energy in form of light and heat, therefore, they are usually exothermic reactions. In the option given in A, nitrogen and nitrogen combine together to form ammonia; this  is a synthesis reaction.
2. D
A radioactive half life refers to the amount of time it will take for half of an original radioactive isotope to decay. 
In the question given above, the half life of the element is 1000. Thus, in 1000 years only half of the original amount will remain. In another 1000 years only 1/4 of the original amount will remain and in another 1000 years only 1/8 of the original amount will remain. Therefore, it will take 3 half lives before 1/8 of the original sample remain.<span />
6 0
3 years ago
Read 2 more answers
If the concentration of Mg2+ in the solution were 0.039 M, what minimum [OH−] triggers precipitation of the Mg2+ ion? (Ksp=2.06×
Elodia [21]

Answer:

2.30 × 10⁻⁶ M

Explanation:

Step 1: Given data

Concentration of Mg²⁺ ([Mg²⁺]): 0.039 M

Solubility product constant of Mg(OH)₂ (Ksp): 2.06 × 10⁻¹³

Step 2: Write the reaction for the solution of Mg(OH)₂

Mg(OH)₂(s) ⇄ Mg²⁺(aq) + 2 OH⁻(aq)

Step 3: Calculate the minimum [OH⁻] required to trigger the precipitation of Mg²⁺ as Mg(OH)₂

We will use the following expression.

Ksp = 2.06 × 10⁻¹³ = [Mg²⁺] × [OH⁻]²

[OH⁻] = 2.30 × 10⁻⁶ M

3 0
3 years ago
A 1.42-g sample of a pure compound with formula m2so4 was dissolved in water and treated with an ex- cess of aqueous calcium chl
solong [7]

The reaction between m_{2}SO_{4} with calcium chloride can be shown as-m_{2}SO_{4}+CaCl_{2}→CaSO_{4}↓+2mCl. The molecular weight of CaSO_{4} is 136.14g. The weight of sulfate ion is 96.06g. The molecular weight of m_{2}SO_{4} = (2×m + 96.06). From the reaction we can see that 1 mole of calcium chloride reacts with 1 molesm_{2}SO_{4} to produce 1 mole of calcium sulfate. Now 1.36g of calcium sulfate is equivalent to 1.36/136.14=9.989×10^{-3} moles of calcium sulfate.

Thus, 9.989×10^{-3} moles of m_{2}SO_{4} reacts in this reaction.

Let assume the atomic mass of m is x thus the molecular weight of m_{2}SO_{4} is 2x+96.

So we may write 9.989×10^{-3}× (2x+96) =1.42

Or, 2x + 96 = 142.146

Or, 2x = 46.146

Or, x = 23.073

Thus the atomic mass of m is 23.073. The atom (m) is sodium (Na).  

8 0
3 years ago
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