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
kirza4 [7]
3 years ago
6

An ore sample is found to contain 10.500000 g of cobalt and 87.3 g waste rock (gangue). What is the

Chemistry
1 answer:
Tamiku [17]3 years ago
3 0

Answer:

\% Co=10.7\%

Explanation:

Hello!

In this case, since this is a mixture composed by cobalt and waste rock, we can compute the percent by mass of cobalt as shown below:

\% Co=\frac{m_{Co}}{m_{Co}+m_{waste}} *100\%\\\\

Thus, we plug in to obtain:

\% Co=\frac{10.500000g}{10.500000g+87.3} *100\%\\\\\% Co=10.7\%

Best regards!

You might be interested in
What is formula of matter
lbvjy [14]

Answer:

density = mass/volume.

Explanation:

6 0
3 years ago
The percent yield for the reaction in which 15.6g of aluminum hydroxide is reacted in excess hydrogen chloride gas is 92.5%. Wha
Misha Larkins [42]

Answer:

24.6 g

Explanation:

4 0
3 years ago
Nguyên tử X có tổng số hạt là 34, số khối X là 56. Điện tích hạt nhân của X là?
Verizon [17]

Answer:

can u tell the question in english

8 0
2 years ago
The reaction for the formation of gaseous hydrogen fluoride (HF) from molecular hydrogen (H2) and fluorine (F2) has an equilibri
mestny [16]

Answer:

[H2]eq = 0.0129 M

[F2]eq = 1.0129 M

[HF]eq = 0.9871 M

Explanation:

  • H2(g) + F2(g) ↔ 2HF(g)

∴ Ke = [HF]² / [H2]*[F2] = 1.15 E2

experiment:

∴ n H2 = 3.00 mol

∴ n F2 = 6.00 mol

∴ V sln = 3.00 L

⇒ [H2]i = 3.00 mol / 3.00 L = 1 M

⇒ [F2]i = 6.00 mol / 3.00 L = 2 M

        [ ]i    change      [ ]eq

H2     1         1 - x         1 - x

F2     2        2 - x         2 - x

HF     -            x              x

⇒ K = (x)² / (1 - x)*(2 - x) = 1.15 E2

⇒ x² / (2 - 3x + x²) = 1.15 E2 = 115

⇒ x² = (2 - 3x + x²)(115)

⇒ x² = 230 - 345x + 115x²

⇒ 0 = 230 - 345x + 114x²

⇒ x = 0.9871

equilibrium:

⇒ [H2] = 1 - x = 1 - 0.9871 = 0.0129 M

⇒ [F2] = 2 - x = 2 - 0.9871 = 1.0129 M

⇒ [HF] = x = 0.9871 M

5 0
3 years ago
What were the results on Rutherford's goldfoil experiment
diamong [38]

Answer:

Explanation:

The relative massive alpha particles could go through the gold foil without being deviated of their trajectory or only small deviations due to the uniformity distribution positive charge of the protons.

4 0
3 years ago
Other questions:
  • Intain their own homeostasis?​
    6·1 answer
  • . When it comes to calculating slope, what does this image represent?
    15·1 answer
  • Consider the neutralization reaction that takes place when hydrochloric acid reacts with aqueous calcium hydroxide
    11·1 answer
  • The relative ionic or covalent character of chemical bonds may be estimated by: (Select all that apply.)
    6·2 answers
  • A rigid steel container with a volume of 100.0 liters is filled with nitrogen gas to a pressure of 30 atmospheres at 295 kelvins
    13·1 answer
  • 1.2 dkg to grams now I have to say extra stuff for it to submit
    6·1 answer
  • PLEASE HELP I WILL MARK YOU BRAINLIEST How many moles of FeCl2 do you need to react 5 moles of Cl2?
    12·1 answer
  • 4. What is the common name of the compound CaOCI,?​
    11·1 answer
  • 5. What is common among the following phenomena?
    8·1 answer
  • Grass → rabbit → fox
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!