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
Fudgin [204]
3 years ago
6

1. Which of the combinations in the lab activity had indications that a chemical change occured? Defend your argument with evide

nce.
2. Which of the combinations in the lab activity had indications that a physical change occured? Defend your argument with evidence.
3. Are all physical changes reversible? Explain your answer using an example you've observed in your everyday life.
4. Give an example of something you've observed in your everyday life that is a chemical reaction. How did you know it was a chemical reaction?
Chemistry
1 answer:
ArbitrLikvidat [17]3 years ago
4 0

Answer:The green growing on the penny of copper and the rust forming on the nail of iron are chemical changes. Boiling away salt water, scraping iron filings from a mixture of sand with a magnet, and breaking a rock with a hammer, are physical changes.

Explanation:

You might be interested in
Group-8 elements are inert and possess
Artemon [7]

Answer:

Group 8 elements are inert and possess :

1. Low Boiling Points

2. High ionization energies

3. Electronegativities is very low

4. No color, odor

Explanation:

Group 8 elements are also called as Noble Gases. They are unreactive.

They have low boiling points means they remains monoatomic  at room temperature.  Having high ionization energy means that it is very difficult to remove an electron from its valence shell.

3 0
3 years ago
Based on its type of chemical bond, which substance has the highest boiling point?
Ber [7]
Answer: Lithium Fluoride

Explanation: Let’s see,,,
1. Obviously not hydrogen or carbon dioxide because they’re gas at room temp.
2. Lithium Fluoride is an ionic compound which means they have higher intermolecular forces and require more energy to break them, so it probably has a higher boiling point.
7 0
2 years ago
Read 2 more answers
Is air a compound mixture or a element.
GenaCL600 [577]

Is air a compound mixture or a element. compound

8 0
3 years ago
Read 2 more answers
Formula for Tricarbon heptabromide.
DiKsa [7]
I believe it would be Au^4Cl8
7 0
3 years ago
You have 500,000 atoms of a radioactive substance. After 2 half-lives have past, how many atoms remain?
Aleonysh [2.5K]

Answer:

125000

Explanation:

Because it is halved and halved again.

3 0
2 years ago
Read 2 more answers
Other questions:
  • Why do scientist record observations during an experiment?
    14·1 answer
  • n a chemical reaction, water decomposes to form hydrogen and oxygen. What is the correct term for the water? Question 5 options:
    9·1 answer
  • A beaker has a mass of 77.275 calculate this mass in mg
    7·1 answer
  • 7. A 28.4 g sample of aluminum is heated to 39.4 °C, then is placed in a calorimeter
    7·1 answer
  • How many fluorine atoms are present in 5.85 g of c2f4?
    6·1 answer
  • Which compound can act as both a Brønsted-Lowry acid and a Brønsted-Lowry base?
    6·2 answers
  • Percent composition of a compound (molar mass= 60.06) 39.99% C, 6.727% H, 53.33% O, What is the molecular formula of the compoun
    6·1 answer
  • How you could speed up the rate of dissolving when dying Easter eggs? The dye tabs are taking a long time to dissolve and evenly
    13·1 answer
  • Which statement is true about relative dating and radioactive dating?
    12·2 answers
  • You have a substance with a length of 2 cm, width of 3 cm, and a height of 4 cm. Its density is known to be .5 g/cm3. What is th
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!