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
astra-53 [7]
3 years ago
15

If someone takes a material that looks pure, and then they do something to it that results

Chemistry
1 answer:
Sati [7]3 years ago
7 0

Answer:

The determination of the nature of the combination of the two separate materials in the original material that looks pure is based on the characteristic of the change process they undergo to become two separate materials.

Therefore, they can know if they initially had a mixture or a compound by the following steps;

1) If the two separated materials can be easily remixed to form the original material, then they likely have a mixture of the two separate materials

2) If the process that results in the formation of the two separate materials, involves the absorption or evolves heat or other forms of energy, then the original substance was a compound

3) If the two newly formed materials is seen to be a permanent change, then the original material was a compound

Explanation:

You might be interested in
A cyclist rode at an average speed of 10 mph for 15 miles. How long was the ride?
xxMikexx [17]
If the cyclist rode at an average speed of 10mph for 15 miles...

we can solve by dividing the distance by the speed to get time using the equation...

Δspeed = Δdistance / Δtime

Δtime = Δdistance / Δspeed

Δtime = 15 miles / 10 mph = 1.5 hours
7 0
3 years ago
Read 2 more answers
What particle has almost mo mass
coldgirl [10]
Photon has no mass at all
6 0
3 years ago
Read 2 more answers
In the reaction 2H2O (1)+ 2Cl^- (aq)= H2(g)+Cl2 (g)+ 2OH^-(aq), which substance is reduced?
Oksanka [162]

Answer:- C. H

Explanations:- Reduction is gain of electron. In other words we could say that decrease in oxidation number is reduction.

As per the rules, oxidation number of hydrogen in its compounds is +1(except metal hydrides) and the oxidation number of oxygen in its compounds is -2.

The oxidation number in elemental form is zero.

In H_2O , the oxidation number of H is +1 and oxidation number of O is -2. Oxidation number of Cl in Cl^- is -1. On product side, the oxidation number of hydrogen in H_2 is zero and in OH^- the oxidation number of H is +1 and that of O is -2. Oxidation number of Cl in Cl_2 is 0.

From above data, Oxidation number of O is -2 on both sides so it is not reduced.

Oxidation number of Cl is changing from -1 to 0 which is oxidation.

Oxidation number of H is changing from +1 to 0 which is reduction.

So, the right choice is C.H

8 0
3 years ago
Plz help me
AlekseyPX
All of the above would be the answer


mark me brainliest
8 0
2 years ago
Read 2 more answers
Predict how the addition of a catalyst would affect the rate of the reaction below, and explain your prediction H2 (g) + I2 (g)
Fynjy0 [20]
A catalyst is a chemical substance that hastens the chemical reaction. This does not participates in the creating the product(s) but allows it to be formed easily. With this, it is now known that the rate of the reaction becomes relatively higher compared to the uncatalyzed reactions.

Therefore, the answer to this item is the rate of the reaction becomes faster. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Dinitrogen tetraoxide formula
    8·2 answers
  • What is the atomic mass of an element if 4.00 grams of it contains 2.98x1022 atoms ?
    15·2 answers
  • Arrange the following particles from smallest to largest. <br> F, F^-1, Br, Br^-1
    10·1 answer
  • Answer these 2 questions FAST PLEASEE!!! I WILL GIVE BRAINLIEST AND GIVE EXTRA POINTS
    14·1 answer
  • Whitney's lung capacity was measured as 3.3 l at a body temperature of 37 ∘c and a pressure of 746 mmhg . how many moles of oxyg
    13·1 answer
  • In the chemical reaction: 2 NaCl (s) + Pb(NO3)2 (aq) ---&gt; 2 NaNO3 (aq) + PbCl2 (s), a student adds 2.5 grams of NaCl(s) to ex
    13·1 answer
  • Why is thre no gas bubble whene there is citric acid?answer all the questions in detail.​
    12·1 answer
  • How many atoms are there in 5.20 mil of hafnium. Please help due in 1hr
    9·1 answer
  • About how many times more massive is a neon atom than a helium atom?
    5·1 answer
  • Can i have someone do this its my birthday and im giving a brainlist
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!