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
creativ13 [48]
3 years ago
10

3)

Chemistry
1 answer:
Vikentia [17]3 years ago
6 0

Answer:

A

Explanation:

I think it is A because a dinosaurs are extinct so it wold be possible to find a dinosaur fossil in the coal mine.

You might be interested in
Please help me with these questions, im not understanding :(
azamat

Answer:

this is all the answers i hope you have a good day

Explanation:

may i please have a branlliests

Download pdf
8 0
3 years ago
A) ambos pertencem ao 5o período da Tabela Periódica;
Reptile [31]

Answer:

A

Explanation:

8 0
3 years ago
The following chemical reactants produce the ester ethyl ethanoate (C4H8O2): C2H6O + CH3COOH What type of reaction occurs to mak
nydimaria [60]

Answer:

Esterification reaction

Explanation:

An esterification reaction is an organic reaction involving an organic acid and an alkanol to give an ester or an ethanoate and water

Like the name suggests, an ester is the product formed in an esterification reaction alongside water. It is like a neutralization reaction but this time it solely contains organic molecules. These molecules react with each other to give rise to another organic molecule which is a member of a different homologous series.

Practically, to form ethyl ethanoate, ethanoic acid react with ethanol in the presence of concentrated sulphuric acid which catalyses the reaction.

8 0
3 years ago
If an element has 9 electrons, how many of them will be in the 2nd energy level?
faust18 [17]
Your answer would come out to 18 electrons 
5 0
3 years ago
Summarize your findings in a short report of 150 words. Include your hypothesis, observations, data, calculations, and conclusio
Damm [24]

Answer:

Follow these steps.

1. Fill the matchbox with pebbles. Weigh the matchbox with the pebbles inside. Record that weight.

2. Tie the string to the box. Allow the string to hang over the edge of the table.

3. Tie the other end of the string to a corner of the plastic bag, leaving an opening to put in coins.

4. Add coins one by one until the box is pulled off the table.

5. Count and record the number of coins and the weight of the bag with the coins in it.

6. Lay the round sticks on the table about 1 inch apart and about 2 inches from the edge of the table.

7. Put the matchbox on the rollers farthest from the edge of the table.

8. Now add coins one by one to the bag until the box is pulled off the table.

9. Count and record the number of coins and the weight of the bag with the coins in it.

10. Repeat the experiment. Determine your margin of error if your results vary. For accuracy, repeat the experiment if desired.

11. Using the equation for the coefficient of friction in the text above, determine the coefficient of friction for the matchbox in each experiment. Include this data in your summary.

Explanation:

I think this is useful

please make me as breainlest

5 0
3 years ago
Other questions:
  • Photosynthesis chemically combines two materials
    5·1 answer
  • What is the definition of enthalpy heat of vaporization?
    9·1 answer
  • How many moles are there in 1.2 x 10^2 atoms of sulfur
    14·1 answer
  • I NEED HELP PLEASE, THANKS!
    10·1 answer
  • Write the balanced equation for the reaction given below: C2H6 + O2 --> CO2 + H2O. If 16.4 L of C2H6 reacts with 0.980 mol of
    5·1 answer
  • A(n) __________ eclipse might occur when the Earth, Moon, and Sun are in the positions shown in the picture.
    13·2 answers
  • How do dominate and recessive alleles differ?
    15·1 answer
  • What is always conserved in a chemical reaction? (3 points)
    6·1 answer
  • What is the expensive property of a substance
    6·1 answer
  • ✨Please help!! ✨. CONVECTION
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!