2 years ago

Calculate the percentage of copper in copper oxide

1 answer:

5 0

Well, look up the atomic weights of copper and oxygen; add them appropriately; divide the total for the copper by the total for the molecule; then multiply by 100 to get it as a percentage.

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The main function of a producer in an ecosystem is

jok3333 [9.3K]

Answer:

A producer is a plant or fungi but it mainly is a organism that produces food for a primary consumer

Explanation:

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3 years ago

8. How many atoms of cobalt are in a 0.39 mole sample of CoC

Debora [2.8K]

8.98

cobalt atoms

Explanation:

Avogadro's number

specifies

6.0221

individual particles. It is simply another collective number like a dozen, or a score, or a gross.

has the property that

6.0221

individual cobalt atoms has a mass of

58.93

⋅

. How did I know that? Did I have it memorized?

So the quantity is

≈

cobalt atoms.

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2 years ago

Two substances A and B, initially at different temperatures, are thermally isolated from their surroundings and allowed to come

Elden [556K]

Answer:

Explanation:

For solving this we need a heat balance

$Q_{a} = Q_{b}\\m_{a}*C_{a}*\Delta T_{a} = m_{b}*C_{b}*\Delta T_{b}$

By changing the corresponding relations, we have

$m_{a}*C_{a}*\Delta T_{a} = \frac{1}{2}m_{a}*4C_{a}*\Delta T_{b} \\\\\\$

By cancelling similar factor, we obtain

$\Delta T_{a} = 2 \Delta T_{b}\\\frac{\Delta T_{a}}{\Delta T_{b}} = 2\\$

Which means that the change of temperature in A is twice the change of B

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3 years ago

The image shows a molecular model of a compound using balls and sticks. Each ball is an atom and each stick is a bond. If you we

Zielflug [23.3K]

Hi , the answers must be part B

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3 years ago

Read 2 more answers

What wavelength of radiation has photons of energy 6.36×10−19 J ?

puteri [66]

I think it’s 44.6 J, but I’m not to sure so hoped this helped /:).

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3 years ago