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3 years ago

Give a brief background of the development of nuclear power.

Chemistry

1 answer:

aleksklad [387]3 years ago

3 0

Answer:

Nuclear began in the 1930s, when physicist Enrico Fermi first showed that neutrons could split atoms. Fermi led a team that in 1942 achieved the first nuclear chain reaction, under a stadium at the University of Chicago

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Based on what you know about matter explain why the food coloring mixes at different rates

emmasim [6.3K]

Answer:

Matter has different densities. Different food colorings have different densities. Those with a higher density will sink to the bottom and mix much easier than one with a lower density. The higher density also contains more particles making it easier to mix or give it a fuller color.

3 0

2 years ago

How many moles and atoms are there in 60 grams of Calcium?

marta [7]

Answer:

The moles present in 60 g of calcium are 1.5 moles.

6 0

3 years ago

Read 2 more answers

Indirect costs incurred in a manufacturing environment that cannot be traced directly to a product are treated as a.product cost

Alisiya [41]

Answer:

C. product costs and expensed when the goods are sold

Explanation:

3 0

3 years ago

A sample of gas occupies 0.04 L at 150 K. What volume does that sample occupy at 300 K?

Natalka [10]

C.
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8 0

3 years ago

An unknown compound contains 38.7 % calcium, 19.9 % phosphorus and 41.2 % oxygen. what is the empirical formula of this compound

Softa [21]

Answer: Ca3(PO4)2

Explanation:

We assume that the sample is 100.0 g.

The sample contains 38.7 g of Ca, 19.9 g of P, and 41.2 g of O as the proportions show.

Then we can calculate the number of moles of each component (n = m/atomic mass).

The number of moles of Ca = 38.7/40.078 = 0.96 mol.

The number of moles of P = 19.9/30.97 = 0.64 mol.

The number of moles of O = 41.2/15.99 = 2.75 mol.

Now, we can get the molar ratios of different components (Ca, P, and O) in the sample by dividing the number of moles of each component by the lower number of moles, that we should divide the number of moles by (0.64).

Ca: P: O = (0.96/0.64) : (0.64/0.64) : (2.75/0.64) = 1.5 : 1 : 4.

To avoid the fraction of the ratios, we can multiply all ratios by 2.0.

Now, the ratio of Ca : P : O will be 3 : 2 : 8.

That main the empirical formula of the compound is Ca3P2O8 which can be expressed as calcium phosphate (Ca3(PO4)2).

8 0

3 years ago