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3 years ago

1 pts

Chemistry

2 answers:

scZoUnD [109]3 years ago

7 0

<h3>Answer: C) Evaporation</h3>

You should boil a pot of salt water. As the water evaporates, it leaves the salt behind. The water molecules go into the air to make water vapor. The more water in the air, the more humid the air will be. The salt particles won't go into the air and won't evaporate. They simply are left behind in the pot. Since water evaporates best when its surface makes contact with the air, you should get a pot that has the largest surface area to speed up the evaporation process.

You could also place spoonfuls of water onto a piece of construction paper to spread out the water over a larger area. Place the paper on a dish to collect the water that seeps through (though the water will eventually evaporate). Placing the dish in the sunlight speeds up the process. Though keep in mind that evaporation is a slow process in general.

bonufazy [111]3 years ago

5 0

Answer:

secound one is the answer: Distillation

this may help you

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Which of the following would exhibit the lowest conductivity?

Marina86 [1]

Answer:

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3 years ago

Tai ran from his home to a position 300 m south of his home in 100 seconds. What was his velocity?

77julia77 [94]

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4 years ago

A substance with a definite volume and a definite shape is classified as a what?

sergeinik [125]

Answer:

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3 years ago

Use the nuclear decay reaction in the picture to answer the following question.

allsm [11]

Answer:

1a. Both sides of the decay reaction have the same charge.

b. The number of nucleons on both sides are the same.

2. The binding energy of one mole of the atom is 17.172 × $10^{16}$ J.

Explanation:

1a. Considering the two sides of the decay reaction and with respect to the law of conservation of charge, it can be observed that both sides have the same charge. Charge can not be created or destroyed in the process.

b. The number of nucleons on both sides are equal. No nucleon is created or destroyed in the process.

2. Binding energy is the minimum energy required to separate an atom into its nucleons. From Einstein's energy equation;

E = Δm $c^{2}$

Where E is the binding energy of the atom, Δm is the mass defect and c is the speed of light.

Given that: Δm = 1.908 g/mol and c = 3 × $10^{8}$ . So that:

E = 1.908 × $(3*10^{8}) ^{2}$

= 1.908 × 9 × $10^{16}$

= 17.172 × $10^{16}$ J

The binding energy of one mole of the atom is 17.172 × $10^{16}$ J.

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3 years ago

Use the unbalanced equation NH3 + O2 = NO + H2O, what is the mole ratio between NH3 and NO

kirill115 [55]

<span>The first thing that needs to be done in order to answer the question above is to balance first the chemical equation by seeing to that the number of moles of a certain element on the reactant side is equal to the number of moles in the product side. 4NH3 + 5O2  4NO + 6H2O The mole fraction between the NH3 and NO is therefore 4:4 or 1:1.</span>

4 0

3 years ago

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