CHEMISTRY HIGH SCHOOL

I need help please Which option is chemical change?

Answers

Answer 1

Answer:

Answer:

Getting coated with tarnish

Explanation:

Silver, the original substance is combining with a new substance tarnish to make a whole new chemical.

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Given the balanced equation representing a reaction:Zn(s) +H2SO2(aq) ==> ZnSO4(aq) + H2(g)What type of reaction is represented by this equation?
(1) decomposition (3) single replacement
(2) double replacement (4) synthesis

Answers

Zn + H₂SO₄ = ZnSO₄ + H₂

answer (3) single replacement

hope this helps!

Predict the changes in the number of particles based the diagram.A) Pressure is indirectly related to moles.
B) Volume is proportionally related to moles.
C) Moles remains constant as pressure changes.
D) Temperature is directly related to the moles.

Answers

Pressure is indirectly related to volume.

As the volume increases at a constant temperature, the pressure decreases.

The changes in the number of particles based on the diagram is that Volume is proportionally related to moles. The answer is letter B. The rest of the choices do not answer the question above.

What is the chemical equation of ccl4, please explain thank you! :-D

Answers

It could be
C + 2Cl2 ➡️ CCl4
I decided this because I believe this is the only way you could make this a balanced equation. To be a balanced equation Both sides of the equation has the same number of atoms for each element. Carbon has 1 atom and chlorine has 4.

Four acids are analyzed and their Ka values are determined. Which of the following values represents the strongest acid?

Answers

Given four acids with different Ka's, the strongest acid will be the one with the greatest Ka. This can be verified by taking the -log(Ka). Larger Ka will result to less pH which means it becomes more acidic. Less Ka means it is relatively basic compared to others.

What mass of NaCl solid should be added to 100mL of pure water to produce a 6.00M solution?

Answers

Molar mass NaCl : 58.44 g/mol

Volume = 100 mL / 1000 = 0.1 L

Molarity = 6.00 M

M = n / V

6.00 = n / 0.1

n = 6.00 * 0.1

n = 0.6 moles

1 mole NaCl ( 58.44 g/mol) * 0.6

mass = 58.44 * 0.6

mass = 35.064 g

hope this helps!

Help plz and can you plz use terms

Answers

I’m not sure but I hope yu get the right answer sorry

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