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olya-2409 [2.1K]
3 years ago
15

What happens to a substance when a physical change happens? (1 point) a A substance may change color or state. There is a new su

bstance formed. b A substance may change color or state. There is no new substance formed. c A substance may change shape, size, or state. There is a new substance formed. d A substance may change shape, size, or state. There is no new substance formed.
Chemistry
1 answer:
Art [367]3 years ago
5 0

Answer:

The answer is D: A substance may change shape, size, or state. There is no new substance formed.

Explanation:

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What is the pH for a 0.10 M HCI solution at 25<br> degreesCelsius?
11Alexandr11 [23.1K]

Answer:

1.0

Explanation:

Hydrochloric acid is a strong acid, that is, an acid that dissociates completely, according to the following reaction.

HCl(aq) → H⁺(aq) + Cl⁻(aq)

Then, the concentration of H⁺ will be equal to the initial concentration of the acid, i.e., 0.10 M.

We can calculate the pH using the following expression.

pH = -log [H⁺] = -log 0.10 = 1.0

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4 years ago
Why are tigers and lions able to mate to produce cubs,but those cubs would not be able to go on to produce any off spring
Sveta_85 [38]

Answer:

Tigers and lions able to mate to produce cubs,but those cubs would not be able to go on to produce any off spring because their sex chromosomes do not match.

Explanation:

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  • In an organism there are two copies of chromosomes present in the somatic cells.
  • But in case of sex cells they receive each set from mother and father. which they duplicate and divide during formation of gametes via meiosis.
  • in such case if the sets are recieved from two different species then after pairing a mismatch will occur in the gene loci.For example, a eye colour gene may correspond to a paw length gene.
  • Thus the gametes when produced will not be viable.
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3 years ago
State the importance of oxygen for germination process
tamaranim1 [39]
Plants need oxygen to survive. 
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4 years ago
A 6.0-mol sample of KClO3 was decomposed according to the equation 2KClO3 --&gt; 2KCl + 3O2. How many moles of O2 are formed?
Vadim26 [7]

Answer:

2.5 mol is the answer

Explanation:

hope it will help you..

4 0
3 years ago
Read 2 more answers
What can you calculate with the Henderson-Hasselbalch equation
Mamont248 [21]

Answer:

Actually, The Henderson - Hasselbalch equation allows you to calculate the pH of the buffer by using the pKa of the weak acid and the ratio that exists between the concentrations of the weak cid and conjugate base.  The pKa of formic acid is equal to 3.75.  In this case, the pH of the solution will be equal to the acid's pKa .

5 0
3 years ago
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