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
Mama L [17]
3 years ago
5

ch sulfide (ZnS) occurs in the zinc blende crystal structure, (a) If 254 g of ZnS contains 170 g of Zn, what is the mass ratio o

f zinc to surfide? (b) How many kilograms of Zn are in 3.82 kg of ZnS?
Chemistry
1 answer:
Aleonysh [2.5K]3 years ago
8 0

Answer:

The mass ratio of zinc to sulfide is 85:42.

2.5559 kg of Zn are in 3.82 kg of ZnS.

Explanation:

a) Mass of zinc sulfide = 254 g

Mass of zinc in a zinc sulfide sample = 170 g

Mass of sulfide in zinc sulfide sample = x

254 g = 170 g+ x

x = 84 g

The mass ratio of zinc to sulfide:

\frac{170 g}{84 g}=\frac{85}{42}

b) Mass of zincsulfide sample = 3.83 kg

The mass ratio of zinc to sulfide is 85:42.

Let the mass of zinc and sulfide be 85x and 42x respectively:

85 x+ 42 x=3.82 kg

x =0.03007 kg

Mass of an zinc= 85x=85 × 0.03007 kg= 2.5559 kg

You might be interested in
Which of these statements accurately describes polymers?
lesya692 [45]

Answer:

Its A.) Polymers are macromolecules

Explanation:

3 0
3 years ago
Read 2 more answers
Following the instructions in your lab manual, you have titrated a 25.00 mL sample of 0.0100 M KIO3 with a solution of Na2S2O3 o
vivado [14]

<u>Answer:</u>

<u>For 1:</u> The amount of potassium iodate that were titrated is 2.5\times 10^{-4} moles

<u>For 2:</u> The amount of sodium thiosulfate required is 1.25\times 10^{-4} moles

<u>Explanation:</u>

  • <u>For 1:</u>

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in L)}}

Molarity of KIO_3 solution = 0.0100 M

Volume of solution = 25 mL

Putting values in above equation, we get:

0.0100M=\frac{\text{Moles of }KIO_3\times 1000}{25}\\\\\text{Moles of }KIO_3=\frac{0.0100\times 25}{1000}=0.00025mol

Hence, the amount of potassium iodate that were titrated is 2.5\times 10^{-4} moles

  • <u>For 2:</u>

The chemical equation for the reaction of potassium iodate and sodium thiosulfate follows:

2KIO_3+Na_2S_2O_3\rightarrow K_2S_2O_3+2NaIO_3

By Stoichiometry of the reaction:

2 moles of potassium iodate reacts with 1 mole of sodium thiosulfate

So, 0.00025 moles of potassium iodate will react with = \frac{1}{2}\times 0.00025=0.000125mol of sodium thiosulfate

Hence, the amount of sodium thiosulfate required is 1.25\times 10^{-4} moles

6 0
3 years ago
When you heat a substance what happens to the molecules
tatyana61 [14]
I'm pretty sure they come closer, and on the small chance i'm wrong, they separate.<span />
6 0
3 years ago
Read 2 more answers
What is largest value for the third quantum number
Kryger [21]

Answer:

18.

Explanation:

3s^2 3p^6 d^10

4 0
2 years ago
PLZ HELP MARK BRAINLIEST 30 POINTS 1) Find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) An 8 ba
finlep [7]

your probobility is equivilant to your

5 0
3 years ago
Other questions:
  • Write the net ionic equation for KNO2 + HCl -&gt; KCl + HNO2
    11·1 answer
  • Which of the following has three electrons in its valence shell?
    7·2 answers
  • A pure substance containing only one king of ______ .
    7·2 answers
  • Clouds that form at an elevation of 3 kilometers will
    6·1 answer
  • HELP PLEASE WILL GIVE  BRAINLIEST , the dark portion of the soil created by the decay of organic matters? is called?
    5·2 answers
  • What was the result of the atomic theory?
    11·1 answer
  • SOMEONE HELP ASAPP...
    12·2 answers
  • According to the law of conservation of mass, if five atoms of hydrogen are used
    6·1 answer
  • Why is natural product and secondary metabolism so widely variable in the plant kingdom?​
    6·1 answer
  • Based on their locations in the periodic table, which two elements are most likely to form covalent bonds with each other?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!