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2 years ago

Why did you get that wrong?

Chemistry

1 answer:

victus00 [196]2 years ago

5 0

Answer:

Got what wrong? A question?

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scientists often look for and attempt to explain patterns in nature. explain why patterns are important

Ronch [10]

patterns are important because they prove life has meaning ( or if you mean

Scientifically is is that the ability to recognize and create patterns help scientists make predictions based on there observations.

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3 years ago

Pls Help! If 3 moles of sugar (C12H22O11) are required to make a giant cobra, how many liters of CO2 will be produced to create

Softa [21]

Answer:

happy Mother's day

Explanation:

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3 years ago

If a calcium supplement claims to have 200 mg of calcium per pill - how much mass if each pill if the supplement is a calcium su

arlik [135]

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2 years ago

Disposal site for solid waste

Alexxandr [17]

Answer:

"where deliberately discarded solid waste is discharged, deposited, injected, dumped, spilled, leaked, or placed so that such solid waste or a constituent thereof may enter the environment or be emitted into the air or discharged into waters, including ground waters."

Explanation:

https://definitions.uslegal.com/s/solid-waste-disposal-site/

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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

2 years ago