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
Dahasolnce [82]
2 years ago
15

Which sample of matter is classified as a substance? (1) air (3) milk(2) ammonia (4) seawater

Chemistry
1 answer:
jeyben [28]2 years ago
3 0
A chemical substance has the characteristics that it cannot be separated by physical  methods. Seawater and milk can be separated by sedimentation, and air has different components depending on other aspects (such as elevation). Only ammonia is a substance. (thus it can have a formula: NH<span>3)</span>
You might be interested in
How are molecules built?
RoseWind [281]
Bonding I'm guessing
6 0
2 years ago
Balance <br> AI(NO3)3 +<br> H2SO4 →<br> Al2(SO4)3 +<br> HNO3
nikklg [1K]

Answer:

2Al(NO3)3 + 3H2SO4 → Al2(SO4)3 + 6HNO3

Explanation:

i just looked up how to balance it, i dont really know how to balance it exactly

5 0
3 years ago
Which of the following is NOT an advantage of the metric system?
notsponge [240]

Answer: The answer is A

Explanation:

7 0
3 years ago
Read 2 more answers
If you could spend a billion dollars (1 x 10 to the 9th power) per second, how many years would it take to spend one mole of dol
lord [1]
1000 to the power 4 not so good at math but
3 0
3 years ago
Which organisms are common pioneer species?
alisha [4.7K]
The first organisms to appear in areas of primary succession are often mosses or lichens. These organisms are known as pioneer species because they are the first species present; pioneer species must be hardy and strong, just like human pioneers.
4 0
2 years ago
Other questions:
  • 3.4 moles of solid CuSO4 is added to 1.8 L of water and allowed to dissolve. Will all the solid dissolve?
    8·1 answer
  • Will the vapors of acetic acid go to the floor or ceiling of a room
    9·1 answer
  • The downward force acting on an object in free fall is the force of
    5·2 answers
  • A certain reaction has the following general form.
    6·1 answer
  • The ____ is found on the right side of the arrow in a chemical reaction
    6·1 answer
  • In the Polyacrylamide and Agarose Gels lab, when working with your protein or DNA sample you must wear:
    10·2 answers
  • Identify earths lithospheric plates
    10·1 answer
  • Twenty-seven pounds (27 lb) of chlorine gas is used for treating 750,000 gal of water each day. The chlorine used up by the micr
    9·1 answer
  • Why is methanol written as ch3oh instead of ch4o?​
    5·1 answer
  • If 2 objects have the same density they must have the same
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!