CHEMISTRY HIGH SCHOOL

Which of the following would NOT be a physical property of matter?malleability


boiling point


color


reactivity

________________________________________________________

If a substance cannot be separated physically or chemically, it is __________.


a compound


an element


a solution


a mixture

___________________________________________________________________

If a substance cannot be separated physically, it is __________.

Question 6 options:


a pure substance


heterogeneous


a mixture


an alloy

___________________________________________________________________

How would you classify tap water?


Question 8 options:


a pure substance



a homogeneous mixture



a compound



a heterogeneous mixture

___________________________________________________________________

When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.


pure substance



homogeneous mixture



compound



heterogeneous mixture

Answers

Answer 1
Answer:

reactivity

solution

mixture

homogeneous mixture

homogeneous mixture


i think the fourth one might be wrong sorry );
Answer 2
Answer:

Which of the following would NOT be a physical property of matter?

reactivity

________________________________________________________

If a substance cannot be separated physically or chemically, it is __________.

an element

___________________________________________________________________

If a substance cannot be separated physically, it is __________.

an alloy

___________________________________________________________________

How would you classify tap water?


a compound

___________________________________________________________________

When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.


compound  

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The Gulf Stream is an example of a(n) ____________ current.a.surfacec.deepb.Coriolis effectd.Antarctic

How can you tell when a solution is formed?

Answers

You may tell when a solution os formed when the item or particle, such as sugar or salt,
dissolves completely in the solvent, such as water. 

Basically, you know when a solution is formed when the material you have placed in the solvent disappears :P
When the solute is completely dissolved into the solvent.

Why does the addition of acid increase the solubility of calcium phosphate? a. It decreases the phosphate ion concentration, forcing the equilibrium to the right. b. It increases the phosphate ion concentration, forcing equilibrium to the left. c. It decreases the phosphate ion concentration, forcing the equilibrium to the left. d. It increases the phosphate ion concentration, forcing the equilibrium to the right. e. It decreases the calcium ion concentration, forcing the equilibrium to the right. f. It increases the calcium ion concentration, forcing the equilibrium to the right. g. It decreases the calcium ion concentration, forcing the equilibrium to the left. h. It increases the calcium ion concentration, forcing equilibrium to the left.

Answers

Answer: c.  It decreases the phosphate ion concentration, forcing the equilibrium to the left.

Explanation:

The calcium phosphate in water is dissociated according to the following equilibrium:

Ca₃(PO₄)₂ ⇄ 3Ca²⁺ + 2PO₄³⁻

A neutralization reactionis one in which an acid reacts with a base. In the reaction a salt is formed and in most cases water is formed.

Phosphate is the complementary base of phosphoric acid, so when adding acid to the solution, we will neutralize the phosphate present according to the following reaction:

PO₄³⁻  + 3H⁺ ⇄ H₃PO₄

Therefore, when adding acid we increase the solubility of calcium phosphate since we are neutralizing the phosphate present in the salt, decreasing the concentration of phosphate, displacing the first equilibrium shown to the left and favoring the dissolution of calcium phosphate.

Final answer:

The addition of acid to calcium phosphate decreases the phosphate ion concentration, causing a shift in equilibrium to the right, resulting in increased solubility of calcium phosphate.

Explanation:

The addition of acid increases the solubility of calcium phosphate because it decreases the phosphate ion concentration. This process forces the equilibrium to shift to the right, as per Le Chatelier's principle. This principle states that when a stress (in this case, acid addition leading to decreased phosphate ion concentration) is applied to a system at equilibrium, the system responds by shifting in a direction that minimizes that stress. In this case, the equilibrium shifts to the right, resulting in the dissolution of more calcium phosphate to replace the phosphate ions that were removed due to the addition of acid.

Learn more about Solubility of Calcium Phosphate here:

brainly.com/question/36029783

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Arrange the isotopes of sulfur and phosphorus in order of decreasing number of neutrons.Rank the isotopes from most to fewest neutrons. To rank items as equivalent, overlap them.

S-36
P-35
S-32
P-33
P-32
P-31

Answers

Neutrons=mass number-atomic number
most          S-36 and P-35(both have 20 neutrons) (36-16=20)(35-15=20)
                 P-33 (33-15=18neutrons)
                 P-32 (32-15=17 neutrons)
least          S-32 and P-31 (both have 16 neutrons) (32-16=16)(31-15=16)

Which reaction occurs at the cathode in an electrochemical cell?(1) combustion (2) neutralization (3) oxidation (4) reduction

Answers

The correct answer is option 4. The reaction occurring in the cathode is a reduction reaction. No matter what type of electrochemical cell it is, electrolytic or voltaic, oxidation reaction always happen in the anode while reduction always happens in the cathode.

In the formation of an ionic compound, electrons are shared between atoms. a. true
b. false

Answers

Its False, because in the formation of an ionic compound, an atom gains or loses an electron.
true i just now because i did it in school

What is ductiliy in a solid ​

Answers

The property by which it can be converted into nuts and bolts
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