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saul85 [17]
3 years ago
11

Help me pleaseeeeeeee​

Chemistry
1 answer:
xxMikexx [17]3 years ago
6 0

Answer:

1. c.

2. d.

3. d.

4. a.

5. a.

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LIST TWO SUBSTANCE THAT CAN BE USED TO (i)REDUCE THE ACIDITY OF A SUBSTANCE
jenyasd209 [6]

Answer:

An acidic substance is any substance with a pH of less than 7, the smaller the number the more acidic it is. ... An acid is a substance that donates hydrogen ions. Because of this, when an acid is dissolved in water, the balance between hydrogen ions and hydroxide ions is shifted.

Explanation:

3 0
3 years ago
Plz help me with these 4 questions!! Need right correct answers!! Thxx!!
lubasha [3.4K]

number one: when substances like rock and minerals are being physically broken down, its called weathering.

Number two: when particles are carried away to another location exp " a river carrying rocks to an ocean" that's called deposition

Number three: this would also be weathering because it is physically being worn down

Number four: would be a topographic map, because theses maps use lines to study elevation instead of color

3 0
3 years ago
Read 2 more answers
The reaction between carbon tetrachloride, CCl4, and water, H2O, to form carbon dioxide, CO2, and hydrogen chloride, HCl, has a
xxTIMURxx [149]

Answer:

High activation energy is the reason behind unsuccessful reaction.

Explanation:

There are two types of reaction: (1) thermodynamically controlled reaction and (2) kinetically controlled reaction.

Thermodynamically controlled reaction are associated with change in enthalpy during reaction. More negative the enthalpy change, more favored will be the reaction.

Kinetically controlled reaction are associated with activation energy of a reaction. The lower the activation energy value, the more rapid will be the reaction.

Here, reaction between CCl_{4} and H_{2}O is thermodynamically favored due to negative enthalpy change but the high activation energy does not allow the reaction to take place by simple mixing.

6 0
3 years ago
How do the number of protons in U-235 and U-238 compare?
8090 [49]
The number of protons among the 2 isotopes remain the same, what varies is the number of neutrons between the 2 isotopes. The isotope with the larger mass number possess a greater number of neutrons compared to the other one.
3 0
4 years ago
In acidic solution, the sulfate ion can be used to react with a number of metal ions. One such reaction is SO42−(aq) Sn2 (aq)→H2
Sav [38]

Answer:

SO₄²⁻(aq) +Sn²⁺(aq) +4H⁺ → H₂SO₃(aq) + Sn⁴⁺(aq) + H₂O

Explanation:

At first calculate the oxidation state of that element which undergoes oxidation as well as reduction.

for SO₄²⁻ the oxidation state of sulphur is +6 and H₂SO₃ the oxidation state of sulphur is +4

So balance equation is

(Reduction)      SO₄²⁻ + 4H⁺+ 2e⁻ → H₂SO₃ + H₂O.........................................(1)

(oxidation)        Sn²⁺ → Sn⁴⁺ + 2e⁻ .............................................................(2)

Adding equation 1 & 2

we get

SO₄²⁻(aq) +Sn²⁺(aq) +4H⁺ → H₂SO₃(aq) + Sn⁴⁺(aq) + H₂O

6 0
4 years ago
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