CHEMISTRY HIGH SCHOOL

What 2 pieces of equipment will you use to separate the salt from the water?

Answers

Answer 1
Answer:

Separate Salt and Water Using Distillation

If you want to collect the water, you can use distillation. This works because salt has a much higher boiling point than water. One way to separate salt and water at home is to boil the salt water in a pot with a lid.

hope this helps!!
Answer 2
Answer:

Final answer:

To separate salt from water, you can use evaporation or filtration.

Explanation:

To separate the salt from the water, you can use the processes of evaporation and filtration.

  1. Evaporation: You can heat the saltwater solution to boil off the water and leave behind the salt as solid crystals. The water evaporates and can be collected as a vapor if desired.
  2. Filtration: Alternatively, you can use a filter to separate the solid salt particles from the liquid water. The saltwater solution is poured through the filter, which traps the salt while allowing the water to pass through.

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An evaporation-crystallization process is used to obtain solid potassium sulfate from an aqueous solution of this salt. The fresh feed to the process contains 19.6 wt% K₂SO₄. The wet filter cake consists of solid K₂SO₄ crystals and a 40.0 wt% K₂SO₄ solution, in a ratio 10.0 kg crystal/kg solution. The filtrate, also a 40.0 wt% K₂SO₄ solution, is recycled to join the fresh feed. Of the water fed to the evaporator, 45.0% by weight is evaporated. The evaporator has a maximum capacity of 175. kg water evaporated/s. a) Assume the process is operating at maximum capacity. Draw and label a flowchart and do the degreeof-freedom analysis for the overall system, the recycle-fresh feed mixing point, the evaporator, and the crystallizer. b) Calculate the maximum production rate of solid K₂SO₄, the rate at which fresh feed must be supplied to achieve this production rate, and the recycle ratio kg/h recycled stream to kg/h fresh feed stream.

A rock has 12.5 percent of its original amount of potassium-40 remaining in it; potassium-40 has a half-life of 1.25 billion years. How long ago was the rock formed?a) 1.25 billion years ago

b) 2.5 billion years ago

c) 3.75 billion years ago

d) 5 billion years ago

Answers

A rock has 12.5 percent of its original amount of potassium-40 remaining in it; potassium-40 has a half-life of 1.25 billion years. 3.75 billion years ago was the rock formed. the answer is letter C

Answer:

the answer is b) 2.5 billion years.  if its half life is 1.25 billion years and there is only 25% of the element remaining, you would take 1.25 billion and multiply it by two to get 2.5 billion.

Which process occurs at the anode in an electrochemical cell?(1) the loss of protons
(2) the loss of electrons
(3) the gain of protons
(4) the gain of electrons

Answers

The process that occurs here in the anode of an electrochemical cell is the loss of electrons (Option 2).

What is an anode?

An anode is a negative pole that is known to be polarized in the electrochemical device of a given outside circuit.

  • Conversely, the cathode is the positive pole where electrons flow in a given current.

In conclusion, the process that occurs here in the anode of an electrochemical cell is the loss of electrons (Option 2).

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The process that occurs at the anode in an electrochemical cell is the loss of electrons. The answer is number 2. Oxidation occurs as electrons are lost at the anode at one of the electrodes in both an electrolytic cell and a voltaic cell.

Within a particular compound, an atom gives up two electrons. This atom is A. part of a covalent compound.
B. positively charged.
C. negatively charged.
D. not part of an electrolyte.

Answers

Answer:

The correct answer is option B. positively charged.

Explanation:

A positively charged ion is an atom that readily loses its one or more electrons in a compound. Positively charged ion generally has same number of electrons and protons which means they are neutral charge atom. These atoms are generally attracted to negatively charged ion that lack electron in outer shell.

Thus, the correct answer is option. B. positively charged.
It is a positively charges because when an atom gives up electrons it becomes positively charges. Think of it like this.....its being generous so it deserves to be a positive person. ;D. 
It cant be A. because a covalent bond only shares and doesn't give up electrons. Our answer must be an ion.
Its not negatively charged because it didn't gain any.

So our answer is B. positively charged

How many grams of iron metal do you expect to be produced when 265 grams of an 84.5 percent by mass iron (II) nitrate solution react with excess aluminum metal? Show all of the work needed to solve this problem. 2Al (s) + 3Fe(NO3)2 (aq) yields 3Fe (s) + 2Al(NO3)3 (aq)

Answers

The balanced reaction is:

2Al (s) + 3Fe(NO3)2 (aq) = 3Fe (s) + 2Al(NO3)3 (aq)

We are given the amount of iron (II) nitrate solution with its purity. This will be the starting point of our calculation.

265 (.845) gram iron (II) nitrate (1 mol Fe(NO3)2 / 179.85 g Fe(NO3)2) ( 3 mol Fe / 3 mol Fe(NO3)2) (55.85 g Fe / 1 mol Fe) = 69.54 g Fe

What is the name of cells that have the ability to develop into different
kinds of cells?

Answers

Answer:

stem cells

Explanation:

hope it helps

What is the total number of valence electrons in an atom of sulfur in the ground state?A. 6
B. 8
C. 3
D. 4

Answers

I am not sure but I think it might be A) 6. Sorry if it is not correct because I am not good at chemistry, Hope this helped! :)
Sulfur is in group 6A. All the elements in the A group are how many electrons it has. Since sulfur is in 6A it has 6 electrons so it the answer is A) 6.
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