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
grigory [225]
3 years ago
5

In 2009, a team from Northwestern University and Western Washington University reported the preparation of a new "spongy" materi

al composed of nickel, molybdenum, and sulfur that excels at removing mercury from water. The density of this new material is 0.20 g/cm^3, and its surface area is 1242 m^2 per gram of material.
A) Calculate the volume of a 40.0-mg sample of this material. (Express your answer to two significant figures and include the appropriate units.)

B) Calculate the surface area for a 40.0-mg sample of this material.

Express your answer to three significant figures and include the appropriate units.

C) A 10.0-mL sample of contaminated water had 7.748 mg of mercury in it. After treatment with 10.0 mg of the new spongy material, 0.001 mg of mercury remained in the contaminated water. What percentage of the mercury was removed from the water?

Express your answer to four significant figures.

D) What is the final mass of the spongy material after the exposure to mercury?

Express your answer to three significant figures and include the appropriate units
Chemistry
1 answer:
Delvig [45]3 years ago
3 0

Answer:

A) 0.20 cm³

B) 49.7 m²

C) 99.99%

D) 17.7 mg

Explanation:

A) The density of a material represents the mass that it occupies in a "piece" of volume. Thus, the density (d) is the mass (m) divided by the volume (v):

d =m/v

If the mass is 40.0 mg = 0.04 g, and the density is 0.20 g/cm³, the volume is:

0.20 = 0.04/v

v = 0.04/0.20

v = 0.20 cm³

B) The surface area (S) is the are that is presented in each gram of the material, so, it's the area (a) divided by the mass (m):

S = a/m

If the mass is 40.0 mg = 0.04 g, and the surface area is 1242 m²/g, so:

1242 = a/0.04

a = 49.7 m²

C) The percent of mercury removed is the mass removed divided by the initial mass, this multiplied by 100%. The mass removed is the initial mass (m0) less the final mass (m), so:

%removed = [(7.748 - 0.001)/7.748] *00%

%removed = 99.99%

D) The final mass of the spongy material is it mass (10 mg) plus the mass removed of the mercury (7.748 - 0.001 = 7.747 mg), so:

m = 10 + 7.747

m = 17.747 mg

m = 17.7 mg

You might be interested in
What is the formula of manganese (Il)<br> phosphate? chemistry related
xeze [42]

The chemical formula of manganese (Il) phosphate is Mn3(PO4)2, which is option 2.

<h3>What is chemical formula?</h3>

The chemical formula of a compound is the notation indicating the number of atoms of each element present in a compound.

The chemical formula of a compound tells us the type of elements in the compound, the number atoms of each element in the compound and in what proportion these elements are present.

According to this question, manganese II phosphate has the chemical formula of Mn3(PO4)2.

This chemical formula shows that it posseses the following:

  • 3 manganese atoms
  • 2 phosphorus atoms
  • 8 oxygen atoms

Learn more about chemical formula at: brainly.com/question/11995171

#SPJ1

4 0
1 year ago
Anyone have any ideas on what i should draw for my art project please let me know
Goryan [66]

Answer:

A pumpkin or a deer cus it's hunting season

5 0
2 years ago
Read 2 more answers
3. How does this difference in language relate to our propensity to save?
stich3 [128]

Answer:

If you speak a futureless language, you will speak about time identically meaning you will feel as they are identical, it increases your propensity to save.

Explanation:

hope this helps you :)

8 0
3 years ago
Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).
slamgirl [31]
Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).
1.20 moles of Silicon are added to 1.00 moles of Nitrogen gas.
(5 Points) Balance the equation and indicate the phases.

Si (___) + N2 (___) → Si3N4 (___)

(5 Points) What is the limiting reactant? You must show your work.
4 0
3 years ago
How do solids and liquids compare with each other?
Marizza181 [45]
I do believe it’s C if I’m wrong Myb fam
5 0
3 years ago
Read 2 more answers
Other questions:
  • If a solution process is exothermic, how does the energy required for dissolving the solute compare with the energy released?
    5·1 answer
  • What is an experiment that can verify that new substances are formed and heat is released or absorbed during a chemcal reaction?
    6·1 answer
  • Explain why it is not a good idea to throw an aerosol can into fire. Which gas law applies?
    15·2 answers
  • historically, the medical consequence suffered by consumers exposed to lead is A.) Stunted growth B.) infection C.) rashes D.) b
    11·2 answers
  • Does Kumiho the legendary exist??​
    13·2 answers
  • . Which of the following is not a product of photosynthesis?
    13·1 answer
  • before you retire in the evening, you sit down for a snack of milk and cookies. when you waken in the morning, you discover a ca
    8·1 answer
  • One solution contains 14.9 g KCl in exactly 10 mL of solution. What is the molarity of the solution? molar mass KCI = 74.5 g/mol
    14·1 answer
  • Using your knowledge of properties of matter, choose the correct description: Question 3 options: physical prop. are luster, col
    5·1 answer
  • B) Explain if the fossil evidence supports the idea that each cycle takes a long period of time.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!