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vladimir1956 [14]
4 years ago
13

Salt dissolved in water is a solution, therefore _____

Biology
2 answers:
alukav5142 [94]4 years ago
8 0

The following statements apply:

1. Salt is not chemically bonded to water.

2. The ratio of salt to water may vary.

3. Salt and water retain their own chemical properties.

The solution formed by dissolving salt in water is an example of a mixture, it is a physical change and no new substance is formed. The salt and the water are not chemically bonded and salt can easily be recovered from the water by mean of evaporation. Any amount of salt can be dissolved in the water and each of the component, that is, salt and water still retain their individual chemical properties.

erma4kov [3.2K]4 years ago
5 0
I've got it. Check it out: Salt dissolved in water is a solution, therefore B. salt is not chemically bonded to water, D. the ratio of salt to water may vary, <span>E. salt and water retain their own chemical properties. Hope you'll find it helpful.</span>
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3 years ago
What type of molecule is represented by the model below?
trapecia [35]

Answer:

Carbohydrate

Explanation:

becouse it hase H C

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In pea plants, height is determined by an allele for tallness (T) that is dominant over an allele for shortness (t). What is the
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3 years ago
How is enthalpy used to predict whether a reaction is endothermic or exothermic?
Radda [10]

<u>Answer:</u>

<em>329.48 KJ/mol heat is released by the combustion of 2 molof methane</em>

<u>Explanation:</u>

The value of enthalpy determines whether the reaction is exothermic or endothermic. If the enthalpy change is positive, then the reaction is endothermic (heat or energy released) and if the enthalpy change is negative then the reaction is exothermic (heat or energy absorbed).

2CH_4(g)+4O_2(g) => 2CO_2(g)+4H_2O(g)

\Delta H \ reaction=[ 2(\Delta HfCO_2)+ 4(\Delta HfH_2O)]-[2(\Delta HfCH_4)+4(\Delta HfO_2)]

                            =2 ( -(393.5 KJ)/mol)-[2( -74.6 KJ/mol)+4(-241.82 KJ/mol)]

                            = -787 KJ/mol-[ -149.2 KJ/mol-967.28 KJ/mol]

                           = -787 KJ/mol+1116.48 KJ/mol

                                          =329.48 KJ/mol

<em>In this question, </em><em>the enthalpy of formation</em><em> has positive value and hence the </em><em>reaction is endothermic</em><em> in which the heat is released. </em>

3 0
3 years ago
Question 1
adelina 88 [10]

Answer:

the answer is A

Explanation:

5 0
3 years ago
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