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xeze [42]
3 years ago
12

12. The particles that are found in the nucleus of an atom are

Chemistry
1 answer:
Tasya [4]3 years ago
4 0

Answer:

Proton and neutron

Explanation:

Electrons orbit round the nucleus as the planet revolve round the sun

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Questions 36 and 37 refer to the following: During a laboratory activity, a student places 25.0 ml of HCIOaq) of unknown concent
Leto [7]
36)  HCl(aq)+KOH(aq)⇒H₂O(l)+KCl(aq)

37)  You can use the equation M₁V₁=M₂V₂
M₁=concentration of acid
V₁=volume of acid in orginal solution
M₂=concentration of base
V₂= the volume of based used to neutralize the acid
M₁=(0.150M KOH x 0.0185L KOH)/0.025L HCl
M₁=0.111M HCl
This equation works since we no based off of the formula in question 36 that 1 mole of KOH will neutralize 1 mole of HCl and <span>M₂V₂ is equal to the moles KOH which means it needs to equal M</span>₁V₁ since that is the number of moles HCl. (if moles HCl did not equal moles KOH the solution would not be neutralized).

3 0
3 years ago
Why is it that when you have a strong acid and weak base your equivalence point is less than 7
yKpoI14uk [10]

Explanation:

When a strong acid, say HCl reacts which a weak base, say NH_3, the reaction is shown below as:-

\text{NH}_3 (\text{aq}) + \text{HCl} (\text{aq}) \rightarrow {\text{NH}_4^+}(\text{aq}) + \text{Cl}^-(\text{aq})

The salt further reacts with water as shown below:-

\text{NH}_4^+ + \text{H}_2\text{O} \rightarrow \text{H}_3\text{O}^+ + \text{NH}_3

Formation of \text{H}_3\text{O}^+ lowers the pH value of the solution as more hydrogen ions leads to less pH.

3 0
3 years ago
Balance the following redox reaction if it occurs in H2SO4. What are the coefficients in front of C3H8O2 and H2SO4 in the balanc
Mrac [35]

Answer:

3C3H8O2 and 16H2SO4

Explanation:

C3H8O2(aq) + K2Cr2O7(aq) → C3H4O4(aq) + Cr2(SO4)3(aq)

In acidic reaction you need to separate the half-reactions knows.

C3H8O2(aq)  → C3H4O4(aq)

Cr2O7(2-) → Cr(+3) (aq)

Balance elements other than O and H. Add H2O to balance oxygen, balance hydrogen by adding protons (H+) and Balance the charge of each equation with electrons

C3H8O2(aq) + 2H2O(l)  → C3H4O4(aq) + 8H(+) + 8e(-)

Cr2O7(2-) + 14H(+) + 6e(-) → 2Cr(+3) + 7H2O (aq)

Scale the reactions so that the electrons are equal. If not look for a common multiple. In this case is 24, 8*3=6*4. So for each equation multiply for the correct multiple. Then

3C3H8O2(aq) + 6H2O(l)  → 3C3H4O4(aq) + 24H(+) + 24e(-)

4Cr2O7(2-) + 56H(+) + 24e(-) → 8Cr(+3) + 28H2O (aq)

Add the reactions and cancel out common terms and group the ions in compounds if u can.

3C3H8O2(aq)  + 32H(+) + 4Cr2O7(2-)  → 3C3H4O4(aq) + 4Cr2(SO4)3(aq) + 22H2O (aq)

We are in acidic medium  so the H(+) must be from H2SO4. So 32H(+) is  16H2SO4 in reactives. Add SO4(2-) in products and balance

16H2SO4 +3C3H8O2(aq) + 4Cr2O7(2-)  → 3C3H4O4(aq) 4Cr2(SO4)3(aq) + 22H2O (aq) + 4SO4(2-)

Then

16H2SO4 +3C3H8O2(aq) + 4Cr2O7(2-)  → 3C3H4O4(aq) 4Cr2(SO4)3(aq) + 22H2O (aq) +  + 2K2SO4 (aq)

8 0
4 years ago
Are eye drops a base or acid???
gregori [183]

base

bye hope you have a good day

3 0
4 years ago
How is human activity affected by sinkholes
tamaranim1 [39]

The effects of sinkholes vary based on where and how they were formed.

When naturally formed on land, they will change the topography of the surroundings, cause nothing but minor issues, if any issue at all.

When formed on highly populated areas, though, they can cause a lot of damage to humans and properties in the region. Damage caused to the base of a building might be a very serious problem.

Toxic chemicals can also come up through sinkholes.

8 0
3 years ago
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