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
Scilla [17]
3 years ago
8

When a physical change in a sample occurs, which of the following does NOT change?

Chemistry
2 answers:
Vanyuwa [196]3 years ago
8 0
I think thee correct answer from the choices listed above is option D. <span>When a physical change in a sample occurs, composition of the sample does not change. It stays the same. Also, the properties of the sample will still be the same. Hope this answers the question.</span>
Lunna [17]3 years ago
5 0
D. Composition does not change during a physical change.
You might be interested in
After he finished his work, Mendeleev predicted _____.
Alex17521 [72]

Answer:

the properties of three undiscovered elements  is the correct answer.

Explanation:

After he completed his work Mendeleev predicted the properties of the undiscovered elements.

In the year 1871, Dmitri Mendeleev predicted the detailed existence and the properties of the three elements that are undiscovered and he gained tremendous fame.

He left the gap in the table to put the elements which are not identified at that time and by glancing at the physical and chemical properties of an element next to the gap, Mendeleev could predict the properties of the not discovered elements.

4 0
3 years ago
4 moles of hydrogen react with 5 moles of oxygen to form water, identify the excess reagent?
Fynjy0 [20]

Answer:

Excess Reagent = oxygen

Explanation:

Limiting reagent: The substance that is totally consumed when the reaction is completed.

Excess reagent: The substance left after the limiting reagent is consumed completely

The balanced chemical equation for formation of water is as follow:

2H_{2}+O_{2}\rightarrow 2H_{2}O

This means when 2 moles of hydrogen reacts with 1 mole of oxygen, 2 moles of water is produced.

Hence the ratio in which hydrogen and oxygen gas reacts is 2:1

Now if 2 mole hydrogen require 1 mole of oxygen ,then 4 mole hydrogen need 2 mole of oxygen.

H_{2}:O_{2}=2:1

or

H_{2}:O_{2}=4:2

Here 5 mole of oxygen is reacting but only 2 mole is required .

Oxygen is in excess.

5 0
3 years ago
Which of the following is an example of a chemical change?
Vsevolod [243]

Answer:

D

Explanation:

It is D because once youve put together the ingredients and baked it you can not go in and taake out every ingredient and put it back to how it was before (Please also try to help me with my question it it about scaled copies, Please and thank you!)

6 0
2 years ago
Read 2 more answers
A. glycerol
Natasha2012 [34]
Bzjnu8:i9.8&9olzlns soccer
4 0
3 years ago
PLZ HELP! Give me a really (winner) good idea for a kids science fair! My little sister has to do one through my school and I ne
OverLord2011 [107]

Explanation:amiga

te

extrañar

8 0
3 years ago
Other questions:
  • Which of the following has the largest atomic radius: calcium, beryllium, barium, and strontium
    15·1 answer
  • How can you use a fossil to indemnify the environment where the organism lived
    13·1 answer
  • A colored solution gives the maximum absorbance value in the spectrophotometer at the wavelength of 533 nm. what are the absorbe
    6·1 answer
  • During the lytic cycle, but not the lysogenic cycle, _____.
    5·1 answer
  • !!!!HELP ASAP 10 points!!!Which of the following families contains liquids, solids, and gases?
    12·2 answers
  • The process by which dissolved gases are exchanged between the blood and interstitial fluids is
    7·1 answer
  • Explain the difference between the bohr model and the electron cloud model
    11·1 answer
  • How many moles of O, will occupy 1.00 L at a temper-
    11·1 answer
  • How many moles are in 9.8 L of xenon gas?
    9·1 answer
  • Which describes the law of conservation of matter?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!