2 years ago

What is the percentage by mass of copper in copper oxide (CuO)?

Chemistry

1 answer:

Viefleur [7K]2 years ago

7 0

Answer:

79.89%

Explanation:

Copper has a molar mass of 63.55

Oxygen has a molar mass of 16.00

If you add these you get 79.55

To get the mass percent of copper divide copper by the whole. 63.55/79.55*100= 79.89%

You might be interested in

Which of the following is not considered a behavior?

noname [10]

Mental illnesses or emotional illness or silly things like eating or dancing

3 0

3 years ago

Read 2 more answers

What is the concentration of a solution that has 15.0 g NaCl dissolved to a total of 750 ml?

Oksana_A [137]

<u>Answer:</u> The concentration of solution is 0.342 M

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Mass of solute (Sodium chloride) = 15 g

Molar mass of sodium chloride = 58.5 g/mol

Volume of solution = 750 mL

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{15g\times 1000}{58.5g/mol\times 750mL}\\\\\text{Molarity of solution}=0.342M$

Hence, the concentration of solution is 0.342 M

6 0

3 years ago

Select the correct answer.

slamgirl [31]

Answer: b

Explanation:

5 0

2 years ago

Ryan wants to identify an element. Which piece of information would best help Ryan identify the element?

Keith_Richards [23]

Atomic number, or symbol.

4 0

3 years ago

Counting Atoms C4012 C= 0=

Ede4ka [16]

269,937 hope this helps!!

5 0

3 years ago

Read 2 more answers