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
Marta_Voda [28]
3 years ago
6

Which of the following is an example of a chemical change?

Chemistry
1 answer:
alexdok [17]3 years ago
3 0

Answer:

Dissolving sugar in water, burning paper, and melting gold are all chemical changes

Explanation:

The action cannot be reversed, or undone. Therefore it is a chemical change.

Boiling water is a physical change.

You might be interested in
A football is inflated to 12psi at 20°C What is the new pressure in the football
Radda [10]

Answer: The new pressure is 3 psi.

Explanation:

Given: P_{1} = 12 psi,         T_{1} = 20^{o}C

P_{2} = ?,          T_{2} = 5^{o}C

Formula used is as follows.

\frac{P_{1}}{T_{1}} = \frac{P_{2}}{T_{2}}\\\frac{12 psi}{20^{o}C} = \frac{P_{2}}{5^{o}C}\\P_{2} = \frac{12 psi \times 5^{o}C}{20^{o}C}\\= 3 psi

Thus, we can conclude that the new pressure is 3 psi.

7 0
3 years ago
Select all that are true statements for RNA*
Kitty [74]

Answer
RNA is single stranded
6 0
3 years ago
Read 2 more answers
Explain why a propane torch is lit inside a hot air balloon during preflight preparations. Which gas law applies?
Olegator [25]

Propane torch is lit inside a hot air balloon during pre-flight preparation because the heat from the touch is needed to heat the cold air inside the balloon, so that the air will expand and become less dense and rise, thus providing a lift for the balloon. This is line with charle's law, which states that, the volume of a fixed mass of ideal gas is directly proportional to the absolute temperature. This law implies that, as the temperature of the air inside the balloon increase, the volume of the balloon also increases.

5 0
3 years ago
Read 2 more answers
I just need answers please!!
otez555 [7]

Answer:

#1 is an organism

#2 is cell

#4 - Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go

4 0
3 years ago
Read 2 more answers
When an electric current passes through water, _____ takes place, breaking down the compound into hydrogen and oxygen. a physica
PSYCHO15rus [73]
Electrolysis takes place when an electric current passes through water.
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which is an example of a heterogeneous mixture? <br>A coffee<br>B soil<br>C gelatin<br>D air
    14·1 answer
  • Why are tadpoles susceptible to disease during metamorphasis
    6·2 answers
  • At birth, a lion cub is:
    5·2 answers
  • Which of the following is NOT a strong acid or strong base?
    13·1 answer
  • Lipid bilayers:A. depend on hydrophobic interactions to arrange the polar head groups together in the interior of the bilayer. B
    14·1 answer
  • There is no connection between the study of chemistry and physics. A. true B. false
    15·1 answer
  • Which of these is true about electrons? posses a positive electrical charge of one (+1) have a negative electrical charge of one
    6·1 answer
  • Think about a hot summer afternoon at the beach
    5·2 answers
  • How is a radioactive element different from a stable element?
    6·1 answer
  • 1 Write the chemical symbols for following elements: Nitrogen-
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!