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
inn [45]
3 years ago
5

Please Help !! Brainliest !! ​

Chemistry
1 answer:
Rufina [12.5K]3 years ago
5 0
Answer:

Data supports significantly because we can use the testing(depending sample) before and after we use the same object to test the hypothesis.
You might be interested in
Fe (s) + S (I) --> Fes (s) In the experiment above, 7.62 g of Fe
Natali [406]

Answer:

B

Explanation:

calculation

6 0
2 years ago
A eraser has a mass of 4g and a volume of 2cm3 what is it’s density
sladkih [1.3K]

Answer:

<h3>The answer is 2.0 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 4 g

volume = 2 cm³

We have

density =  \frac{4}{2}  \\

We have the final answer as

<h3>2.0 g/cm³</h3>

Hope this helps you

4 0
3 years ago
What term is defined as splitting large nuclei into smaller ones
svetoff [14.1K]

Answer:

Nuclear Fission.

Explanation:

This happens when a high-energy particle collides with a radioisotope, which splits into 2 daughter nuclei, several neutrons (which can collide with more radioisotopes to cause a chain reaction); and a lot of energy. That's why nuclear power plants are so good.

5 0
3 years ago
PLEASE HELP WITH EASY 8th GRADE SCIENCE!!
atroni [7]
I think c is the right answer
8 0
3 years ago
Read 2 more answers
Calculate the DH°rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide. DH°f means delta or change
USPshnik [31]

Answer: +178.3 kJ

Explanation:

The chemical equation  follows:

CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

The equation for the enthalpy change of the above reaction is:

\Delta H^o_{rxn}=[(1\times \Delta H^o_f_{(CaO(s))})+(1\times \Delta H^0f_{CO_2}]-[(1\times \Delta H^o_f_{(CaCO_3(s))})]

We are given:

\Delta H^o_f_{(CaO(s))}=-635.1kJ/mol\\\Delta H^o_f_{(CaCO_3(s))}=-1206.9kJ/mol\\\Delta H^o_f_{(CO_2(g))}=-393.5kJ/mol\\\Delta H^o_{rxn}=?

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-635.1))+(1\times (-393.5))]-[(1\times (-1206.9))]

The DH°rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide is +178.3 kJ

5 0
2 years ago
Other questions:
  • Water droplets forming on the inside of a cold windshield is an example of
    11·2 answers
  • What is the amount of energy for a photon that has a 125 cm wavelength
    11·1 answer
  • How objects with different masses and volumes have the same density?​
    12·1 answer
  • 4. Which of the following aromatic compounds undergoes nitration faster than benzene does? Explain your answer
    8·1 answer
  • HELP PLEASEEEE The speed of a motorcycle increases from 10 m/s to 50 m/s in 9 seconds. What is its acceleration? *
    9·1 answer
  • Which of the following is NOT true about nuclear fusion?
    12·1 answer
  • 2. Report each of the following quantities to 3 significant figures. Use standard notation if possible, or
    12·1 answer
  • Someone pleaseeee help me I need it now​
    10·1 answer
  • Completas las secuelas<br>​
    5·2 answers
  • A solution is formed by dissolving 83.2 grams of copper II chloride (CuCl2) in 2.5 liters of water. The molar mass of CuCl2 is 1
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!