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Ket [755]
3 years ago
8

The top is an example problem the bottom one is the one i need help with. I only need C,D, and E please help

Chemistry
2 answers:
mel-nik [20]3 years ago
8 0
Correct
Just rewrite is
velikii [3]3 years ago
5 0

Answer:

correct

Explanation:

makes sense just re-write!

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What is the molarity of 2 moles of iron oxide,FeO in 8 Liters of water
faust18 [17]

Answer : 0.25 M

explanation :

- Molarity is the number of moles of solute per liters of solvent.

- Molarity (M) = (n) / V (liter) = 2 / 8 = 0.25 M


5 0
2 years ago
Hdjshjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj???????????????
marshall27 [118]

Answer:

based on my knowledge

B. 678.5 j

8 0
2 years ago
Which of the following groups of materials would
Nikitich [7]
The wrong answers for sure are B and D, I assume the answer is C
4 0
3 years ago
Read 2 more answers
A certain amount of hydrogen peroxide was dissolved in 100. mL of water and then titrated with 1.68 M KMnO4. What mass of H2O2 w
Stels [109]

Answer:

see explanation below

Explanation:

First to all, this is a redox reaction, and the reaction taking place is the following:

2KMnO4 + 3H2SO4 + 5H2O2 -----> 2MnSO4 + K2SO4 + 8H2O + 5O2

According to this reaction, we can see that the mole ratio between the peroxide and the permangante is 5:2. Therefore, if the titration required 21.3 mL to reach the equivalence point, then, the moles would be:

MhVh = MpVp

h would be the hydrogen peroxide, and p the permanganate.

But like it was stated before, the mole ratio is 5:2 so:

5MhVh = 2MpVp

Replacing moles:

5nh = 2MpVp

Now, we just have to replace the given data:

nh = 2MpVp/5

nh = 2 * 1.68 * 0.0213 / 5

nh = 0.0143 moles

Now to get the mass, we just need the molecular mass of the peroxide:

MM = 2*1 + 2*16 = 34 g/mol

Finally the mass:

m = 0.0143 * 34

m = 0.4862 g

8 0
3 years ago
Describe how and why the statue of the Sphinx has changed since it<br>was made.​
Lyrx [107]

Answer:

I don't know if this will help but. The Great Sphinx has suffered from erosion and vandalism. Hatshepsut's stepson was too young to rule at the time of her husband's death, so she just took the job.

8 0
2 years ago
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