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
docker41 [41]
3 years ago
12

In the laboratory you are asked to make a 0.303 m cobalt(II) sulfate solution using 275 grams of water. How many grams of cobalt

(II) sulfate should you add?
Chemistry
1 answer:
valentinak56 [21]3 years ago
4 0

Answer: 12.92g of CoSO4

Explanation:

Molar Mass of CoSO4 = 59 + 32 + (16x4) = 59 + 32 +64 = 155g/mol

Molarity of CoSO4 = 0.303mol/L

Mass conc. In g/L = Molarity x molar Mass

= 0.303x155 = 46.965g/L

275 grams of water = 0.275L of water

46.965g of CoSO4 dissolves in 1L

Therefore Xg of CoSO4 will dissolve in 0.275L i.e

Xg of CoSO4 = 46.965x0.275 = 12.92g

Therefore 12.92g of CoSO4 is needed

You might be interested in
What element was named for the scientist who discovered the nucleus of the atom using gold foil
Artist 52 [7]
<span>rutherfordium element # 104</span>
4 0
3 years ago
Which of the following are cations? Check all that apply.
Lostsunrise [7]

Answer:

a

barium

b

calcium

e

aluminum

f

magnesium

g

copper

Forms cation

Explanation:

4 0
3 years ago
What is the correct name of the compound Pb(NO3)2?
Margaret [11]

Answer:

it's lead (ii) nitrate the name

4 0
2 years ago
A pharmacist wishes to strengthen a mixture from 10%alcohol to 30% alcohol. How much pure alcohol should be added to 7 liters of
Tomtit [17]

Answer:

2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

Explanation:

Suppose x is the number of litres added to the 10% mixture than the quantity of new mixture is given as below

  • n_{old}=7 litres
  • n_{new}=7+x litres

Also the quantity of alcohol is given as

  • q_{old}=10 \% \, of \, 7 \, litres =0.7
  • q_{added}=x
  • q_{new}= 30 \% \,of \,new\, quantity = 0.3(7+x)

Now the equation is as

                                  q_{old}+q_{added}=q_{new}\\0.7+x=0.3(7+x)\\0.7+x=2.1+0.3x\\x-0.3x=2.1-0.7\\0.7x=1.4\\x=2 \, litres

So 2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

8 0
3 years ago
Two chemical reactions are shown. Which statements is true?
Marizza181 [45]

Answer:

The answer is b

Explanation:

they both are decomposition

7 0
3 years ago
Other questions:
  • A white crystalline salt conducts electricity when it is melted and when it is dissolved in water. which type of bond does this
    11·2 answers
  • Which quantity is equal to one Au
    12·1 answer
  • Tentukan pH Mg(OH)2 jika ke dalam larutan MgCl2 0,2M ditambahkan NH4OH sehingga
    9·1 answer
  • If two parents with the genotypes bb and BB have children, what percentage of their children will have bushy eyebrows (dominant)
    13·1 answer
  • Both "Ode to the West wind" and "Ode for Melancholy"
    5·1 answer
  • 1. When recommending solutions to decrease human impact, which location were you able to make the greatest positive impact? Plea
    14·1 answer
  • What’s the answer to this question pls help
    7·1 answer
  • Match the term with its description. (4 points)
    8·1 answer
  • What is a unique quality of the halogens/halides?
    15·1 answer
  • Pls pls help<br> Pls pls pls help
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!