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Harlamova29_29 [7]
4 years ago
8

Prepare a 0.50 L of a 1.0 M solution of potassium sulfate. Determine the amount of potassium sulfate needed in correct significa

nt figures.
A) 68 g
B) 87 g
C) 270 g
D) 349 g
I can't figure out the answer.
Chemistry
1 answer:
Lera25 [3.4K]4 years ago
3 0

Answer:

B) 87g

Explanation:

Usatestprep said it

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4 0
3 years ago
when 45 grams of copper (ii) carbonate are decomposed with heat how many grams of carbon dioxide will be produced
Maksim231197 [3]

Answer:

16.02 g

Explanation:

the balanced equation for the decomposition of CuCO₃ is as follows

CuCO₃ --> CuO + CO₂

molar ratio of CuCO₃ to CO₂ is 1:1

number of CuCO₃ moles decomposed - 45 g / 123.5 g/mol = 0.364 mol

according to the molar ratio

1 mol of CuCO₃ decomposes to form 1 mol of CO₂

therefore 0.364 mol of  CuCO₃ decomposes to form 0.364 mol of CO₂

number of CO₂ moles produced - 0.364 mol

therefore mass of CO₂ produced - 0.364 mol x 44 g/mol = 16.02 g

16.02 g of CO₂ produced

8 0
4 years ago
Elements are solid, liquid, and gas substances that can be found on Earth. Which statement best describes an
OleMash [197]

Answer:

Elements can be separated into smaller atoms

8 0
3 years ago
What type of wave contains compression and rarefaction
Hunter-Best [27]

Answer:

longitudinal waves

Explanation:

7 0
3 years ago
Which of the following can form an aqueous solution that conducts electricity?
julia-pushkina [17]

Answer:

Pb(NO3)2

Explanation:

  • Compounds that conduct electricity either in the aqueous or molten form are known as electrolytes.
  • Electrolytes conduct electricity due to the presence of mobile ions.
  • Electrolytes are, therefore, decomposed by passing an electric current through them, a process known as electrolysis.
  • Lead(ii) nitrate can form an aqueous solution that conducts electricity also known as an electrolyte.
  • It ionizes in water to generate lead ions and nitrate ions which are responsible for the conducting of electricity.
4 0
3 years ago
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