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
romanna [79]
3 years ago
12

Define chemical changes and physical changes. Give two examples of each

Chemistry
1 answer:
Ganezh [65]3 years ago
7 0

Answer:

a chemical change can not be reversed but a physical change can be reversed

Explanation: hope this helps

You might be interested in
A chemist measures the amount of hydrogen gas produced during an experiment. She finds that 264. g of hydrogen gas is produced.
Lesechka [4]

Answer:

The answer is 130.953 g of hydrogen gas.

Explanation:

Hydrogen gas is formed by two atoms of hydrogen (H), so its molecular formula is H₂. We can calculate is molecular weight as the product of the molar mass of H (1.008 g/mol):

Molecular weight H₂= molar mass of H x 2= 1.008 g/mol x 2= 2.01568 g

Finally, we obtain the number of mol of H₂ there is in the produced gas mass (264 g) by using the molecular weight as follows:

mass= 264 g x 1 mol H₂/2.01568 g= 130.9731703 g

The final mass rounded to 3 significant digits is 130.973 g

4 0
3 years ago
Match the following.
cupoosta [38]
1.icosahedralb2.helicalc3.complexa
8 0
3 years ago
A teacher is teaching a lesson on energy transformations. Which explanation is the best at comparing the amount of energy contai
LenKa [72]
I believe it’s b though not sure
4 0
3 years ago
Read 2 more answers
Lysosomes are important for _____.
kirza4 [7]
Digestion would be correct. Hope this helps
8 0
3 years ago
Read 2 more answers
a welding torch requires 4122.8L of ethylene gas at 0.64 atm what will be the pressure of the gas if ethylene is supplied by a 5
Ipatiy [6.2K]

Answer:

a welding torch requires 4122.8L of ethylene gas at 0.64 atm

8 0
3 years ago
Other questions:
  • The acid dissociation constant ka for an unknown acid ha is 4.57 x 10^-3 what is the base dissociation constant kb for th econju
    5·1 answer
  • Which of the following is used in pencils?
    10·2 answers
  • Gas X has a mass of 28.02 amu and gas Y has a mass of 32 amu. Which gas will diffuse faster?
    14·2 answers
  • Ethylene, a gas found in nature, is commonly used to ripen bananas and other fruits. Which compound is ethylene?
    14·1 answer
  • Use the equation 2cu+o2=2cuo to find how many miles of copper react to form 3.64 mil cuo
    9·2 answers
  • Which electromagnetic wave has the highest frequency?
    9·2 answers
  • Plssssssssssss help me
    11·1 answer
  • HELP!
    14·1 answer
  • A sample of aluminum foil contains 9.20 x 1023 atoms. What is the mass of the foil?​
    10·1 answer
  • Figure 2 shows what happens to the electrons in the outer shells when a sodium atom reacts with a fluorine atom.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!