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PilotLPTM [1.2K]
3 years ago
14

Recycling of aluminum cans is an example of A) increasing entropy is a nonspontaneous process B) decreasing entropy is a nonspon

tanous process C) increasing entropy is a spontaneous process D) decreasing entropy is a spontaeous process.
Chemistry
1 answer:
Helen [10]3 years ago
3 0

Answer:

B) decreasing entropy is a non-spontaneous process

Explanation:

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What is the mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water
dlinn [17]

Answer:

The mass percent of a solution of 7.6 grams sucrose in 83.4 grams of water is 8.351 %.

Explanation:

Given,

Mass of Sucrose = 7.6 grams

Mass of Water = 83.4 grams

In this solution, Sucrose is solute and water is the solvent.

Mass percent of a solution can be calculated using the formula,

Mass percent =  (Mass of Solute/Mass of Solution)(100)

As sucrose is solute, mass of solute = 7.6 grams

As the solution contains both Sucrose and Water,

Mass of solution = 7.6 grams + 83.4 grams = 91 grams

Substituting the values, Mass percent = (7.6/91)(100) = 8.351 %.

7 0
3 years ago
Calculate the molarity of the two solutions.
beks73 [17]

Answer:

A = Molarity = 0.22 M

B = Molarity = 0.36 M

Explanation:

Given data:

For first solution:

number of moles = 0.550 mol

Volume of solution = 2.50 L

Molarity = ?

Molarity:

Formula:

Molarity = number of moles of solute / volume of solution in L.

Molarity = 0.550 mol / 2.50 L

Molarity = 0.22 M

For second solution:

Mass of NaCl =  15.7 g

Volume of solution = 709 mL  or 709/1000 = 0.709 L

Molarity = ?

Solution:

Number of moles = mass / molar mass

Number of moles = 14.7 g/ 58.44 g/mol

Number of moles = 0.252 mol

Molarity:

Molarity = number of moles of solute / volume of solution in L.

Molarity = 0.252 mol / 0.709 L

Molarity = 0.36 M

8 0
3 years ago
Which of these is a chemical property of a substance?
valentinak56 [21]
Color, the other answers arent changing the substance into something different
3 0
3 years ago
What is the total number of protons in an h2o atom?
NISA [10]
The atomic number of H2O is 18 hence it contains 18 protons. Hope this helps.
5 0
3 years ago
How many grams are there in 2.75E23 molecules of C2H6 (MM = 30 grams)?
skelet666 [1.2K]

Answer:13.70 i think

Explanation:

3 0
2 years ago
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