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3 years ago

Please help, timed test, will give brainliest

Chemistry

1 answer:

OlgaM077 [116]3 years ago

4 0

Answer:

The answer to your question is letter B

Explanation:

A.) 2 AgCl + Na2S ⟶ 2 Ag2S + 2 NaCl

Reactants Elements Products

2 Ag 4

2 Cl 2

2 Na 2

1 S 2

This reaction is unbalanced

B.) 2 AgCl + Na2S ⟶ Ag2S + 2 NaCl

Reactants Elements Products

2 Ag 2

2 Cl 2

2 Na 2

1 S 1

This reaction is balanced

C.) AgCl + Na2S ⟶ 2 Ag2S + 2 NaCl

Reactants Elements Products

1 Ag 4

1 Cl 2

2 Na 2

1 S 2

This reaction is unbalanced

D.) 2 AgCl + 2 Na2S ⟶ Ag2S + NaCl

Reactants Elements Products

2 Ag 4

2 Cl 1

4 Na 1

2 S 1

This reaction is unbalanced

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How many grams of CO are produced when 41.0 g of C reacts?

CaHeK987 [17]

Answer:

95.7 g CO to the nearest tenth.

Explanation:

2C + O2 ---> 2CO

Using relative atomic masses:

24 g C produces 2*12 + 2*16 g CO.

So 41 g produces ( (2*12 + 2*16) * 41 ) / 24

= 95.7 g CO,

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What is a difference between starch and glycogen

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4 years ago

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An aqueous solution is found to be 3.64% potassium nitrate by mass, how many grams of solution should I evaporate the water from

Sidana [21]

Answer:

513.74 g of solution

Explanation:

% Mass grams are defined as the grams that are dissolved in salt (in this case, it would be potassium nitrate) dissolved every 100 g of the solution. Having this information, you can calculate the amount of solution that has dissolved 18.7 g of potassium nitrate, which is what we want to obtain.

The relationship is:

3.64 g of potassium nitrate _____ 100 g solution

18.7 g of potassium nitrate _____ X = 513.74 g of solution

Calculation: 18.7g x 100g / 3.64g = 513.74 g of solution

So, I need 513.74 g of solution to get 18.7g of potassium nitrate by evaporating it.

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3 years ago

Write a balanced equation for the reaction of sulfuric acid (H,SO) and

Sonbull [250]

Answer:

Explanation:

Word equation:

sulfuric acid + ammonium hydroxide → ammonium sulfate + water

Chemical equation:

H₂SO₄ + NH₄OH → (NH₄)₂SO₄ + H₂O

Balanced chemical equation:

H₂SO₄ + 2NH₄OH → (NH₄)₂SO₄ + 2H₂O

The given reaction is the reaction of acid with base. When acid and base react salt and water are produced. In given reaction an acid sulfuric acid and base ammonium hydroxide react and form ammonium sulfate salt and water. The given reaction also follow the law of conservation of mass.

Steps to balance the equation:

Steps 1;

H₂SO₄ + NH₄OH → (NH₄)₂SO₄ + H₂O

H = 7 H = 10

S = 1 S = 1

O = 5 O = 5

N = 1 N = 2

Step 2:

H₂SO₄ + 2NH₄OH → (NH₄)₂SO₄ + H₂O

H = 12 H = 10

S = 1 S = 1

O = 6 O = 5

N = 2 N = 2

Step 3:

H₂SO₄ + 2NH₄OH → (NH₄)₂SO₄ + 2H₂O

H = 12 H = 12

S = 1 S = 1

O = 6 O = 6

N = 2 N = 2

3 0

3 years ago

Which of the following is true of a buffered solution? Group of answer choices All of these are true The solution resists any ch

olya-2409 [2.1K]

Answer:

All of these are true

Explanation:

A buffer solution in chemistry is a solution that resists changes in pH when an acid or base is added to it. It is a solution that contains a weak acid and its conjugate base (anion) or a weak base and its conjugate acid.

A buffer is able to resist a change in pH due to the conjugate base and conjugate acid of the weak acids and bases contained in them respectively. The conjugate base/acid are present in an equilibrium quantity with their acid/base counterparts and help to neutralize or react with any additional H+ or OH- from an acid or base added to their solution.

However, when a strong acid or base is added to the buffer solution, there is only a slight change which practically does not change the pH of the solution.

Hence, all of the above options about a buffered solution is true.

5 0

3 years ago