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
Finger [1]
3 years ago
9

Please help on my test

Chemistry
1 answer:
Alisiya [41]3 years ago
5 0

Answer:

C

Explanation:

You might be interested in
How many moles are in 48.0g of H2O2?
Tju [1.3M]

Answer:

1.41 moles H2O2(with sig figs)

Explanation:

okay so what is the molar mass of H2O2= (1.008 g/mol)2+(16.00g/mol)2= (2.016+ 32.00) g/ mol

= 34. 02 g/mol

48.0g H2O2* 1 mol H2O2/ 34.02 g H2O2= 1.41 mol H2O2

3 0
2 years ago
Design an experiment to collect data that supports the claim that a 1.0M NaCl solution is a homogenous mixture.
Alika [10]
The claim is that NaCl mixture is a homogeneous mixture.
Homogeneous mixture means that the components of the mixtures cannot be determined or separated by the naked eye. However, these components can be separated using physical means, such as boiling, evaporation and condensation which will be used in this experiment.

First, we need to prepare one molar solution of NaCl. To do so, we will dilute a mass of 58.44 grams (molar mass of NaCl) in 1 liter of water.
By this, we will have NaCl solution.

We can notice that once the NaCl is diluted in water, all what you can see is a clear solution. You cannot see the separate particles of NaCl in water.
..............> observation I

Now, we will heat this solution until it boils and water starts evaporating. We will place a cold surface above the steam coming out from the boiling solution.

What we will observe is that when all the water evaporates, we can see white precipitate of NaCl in the bottom of the container. Examining the cold surface placed above the steam, we can see that the water has condensed on this surface.
.........>observation II

Based on this, we managed to use boiling, evaporation and condensation (physical methods) to restore the components of the solution separately.
.............>conclusion

Based on observation I, observation II and the conclusion. we were able to prove that NaCl solution is a homogeneous mixture.
7 0
3 years ago
A chocolate bar weighs 4.00 ounces. If the chocolate delivers 2.78 calories per gram, how many
dimulka [17.4K]

Answer:

40.79

Explanation:

an ounce is equal to approximately 28.3 grams.

if you have 4 ounces then it would be equal to about 113.4 grams. then you would divide that by 2.78 which will equal about 40.8

6 0
3 years ago
What does a bond do?
frozen [14]

Answer:

chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic forces.

Explanation:

I hope this helps

5 0
3 years ago
Please answer ASAP!!!
Karolina [17]
A. Conducting a drug experiment which will harm lab rats
4 0
2 years ago
Read 2 more answers
Other questions:
  • Why modern periodic table is superior than Mandeleev's periodic table?​
    6·1 answer
  • Find the potential difference required to accelerate protons from rest to 10% of the speed of light. (at this point, relativisti
    14·1 answer
  • Provide two examples of how scientists communicate experimental results
    8·2 answers
  • Ammonia is a compound of hydrogen and nitrogen that dissolves easily in water. can you conclude that the hydrogen nitrogen disso
    12·1 answer
  • What is the second quantum number of a 2s^2 electron in phosphorus,
    5·1 answer
  • A jar contains helium gas. what would happen if the lid of this Jar was removed
    9·1 answer
  • Give the IUPAC name for the following compound. Group of answer choices 6-Ethyl-6-methylhept-3-yne 6,6-Dimethyloct-3-yne 3,3-Dim
    5·1 answer
  • Fun fact! <3
    12·2 answers
  • Determine the number of atoms of O in 60.1 moles of Fe₂(SO₃)₃.
    5·1 answer
  • Please help me. I will mark you as a brainleist.​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!