1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
leonid [27]
2 years ago
12

Which of the following observations NOT likely describes a chemical change? a A white solid was exposed to ultraviolet light and

turned brown. b Two clear liquids were mixed together and a yellow solid formed c A solid was added to water and the mixture was stirred until the solid was no longer visible d A piece of metal was added to a liquid and bubbles formed on the surface of the metal
Chemistry
1 answer:
kiruha [24]2 years ago
7 0

Answer:

The correct answer would be - c.  A solid was added to water and the mixture was stirred until the solid was no longer visible

Explanation:

Photostabalizing is the process where a solid change its color in the presence of ultraviolet light, it is a chemical change, so the first option would not be the correct answer.

when two liquid or aqueous solutions are mixed together and form a solid substance, this reaction is known as precipitation and it is a chemical reaction too.

When a solid is placed in a liquid and after stirring it makes the solid vanish is a physical change known as dissolving character.

Thus, the correct answer is option C.

You might be interested in
A student walks 3.0 hours and travels 6.0km what is the averge speed
saveliy_v [14]

Answer:

2.0 km/hr

Explanation:

6.0 km/3.0 hrs

= 2.0 km/hr

Hope this helps!      :3

plz mark as brainliest!

6 0
2 years ago
Calculating grams:
Alex_Xolod [135]

Answer:

The answer to your question is 55.224 g of NiCl₂

Explanation:

I will solve it and then I compare the results.

Data

Volume = 0.8 l

Molarity = 0.531

substance = NiCl₂

Process

1.- Calculate the molar mass of NiCl₂

NiCl₂ = 59 + (35.5 x 2)

         = 130 g

2.- Calculate the number of moles

Molarity = moles / volume

-Solve for moles

  moles = Molarity x volume

-Substitution

  moles = 0.531 x 0.8

-Result

  moles = 0.4248

3.- Convert the moles to mass

                   130 g -------------------- 1 mol of NiCl₂

                      x     -------------------- 0.4248 moles

                           x = (0.4248 x 130) / 1

-Simplifying

                         x = 55.224 / 1

-Result

                        x = 55.224 g of NiCl₂

4.- We need 55.224 g of NiCl₂ to prepare 0.8l of a solution 0.531 M.

You have similar results, just our molar mass is different.

6 0
2 years ago
Match the terms to their descriptions. proton
Sveta_85 [38]

Answer:

proton - 5

electron - 4

electron cloud - 3

valence electron - 7

valence shell - 2

isotopes - 1

7 0
3 years ago
In the induced fit model of enzymes, a substrate associates itself with which part of an enzyme?
NNADVOKAT [17]
Hello.

Active site of the enzyme.

Have a nice day
8 0
3 years ago
Upon balancing the equation what is the smallest possible integers that goes in front O₂? HBr + O₂ ➞ H₂O + Br₂ *
Leokris [45]

Answer:

1

Explanation:

4 HBr + O2 → 2H 20 + 2Br 2

...............

7 0
2 years ago
Read 2 more answers
Other questions:
  • What volume of gold would be equal in mass to a piece of copper with a volume of 101 ml? the density of gold is 19.3 g/ml; the d
    10·2 answers
  • A scientist wants to make advances in the way skin cancer patients are
    8·1 answer
  • Which of these best describes the relationship between density and the rate of heat transfer?
    13·1 answer
  • Why are stomates important for gas exchange and photosynthesis?
    7·1 answer
  • There are three states of matter: solid, liquid, and gas. is this true or false
    8·1 answer
  • A metal sphere of 0.5 kg is heated to 300 o C, than dropped into a beaker holding 4.08 kg mercury at 20 o C. The temperature of
    8·1 answer
  • Clouds are formed from which of the following processes:
    14·1 answer
  • Gases in order of increasing average molecular speed from slowest to fast at 25 c he,ne,nh3,no2,co.​
    6·1 answer
  • Ay
    10·1 answer
  • Can someone help me please. Will mark brainliest!<br> Which equation shows an increase in entropy?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!