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3 years ago

The simplest form of all matter are small partials called

Chemistry

1 answer:

iris [78.8K]3 years ago

6 0

All matter is made up of small particles called atoms.

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The image shows the representation of an unknown element in the periodic table. A square is shown. Inside the square twelve is w

avanturin [10]

Answer:

The combined mass of all the protons and electrons is 24.305.

Explanation:

From the information given about the atom, we can see that the relative atom mass of the element is 24.305.

The relative atomic mass of an atom is the combined mass of all its isotope in proportion of their geonormal abundances. On the periodic table, this mass deals with the amount of protons and neutrons present in a given atom.

7 0

3 years ago

How can you increase the momentum of an object?

Elena-2011 [213]

I think its B because if u increase the mass itll have more force which will increase the momentum

5 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

Lithium hydroxide, LiOH, would react with ________ to form salt and water.

love history [14]

acid

when a metal hydroxide reacts with acid it forms a salt and water, for example:

lithium hydroxide + hydrochloric acid → lithium chloride (the salt) + water

3 0

3 years ago

Give the ground state electron configuration for lead

melomori [17]

<span>the electron configuration ... Write the ground-state electron configuration of alead atom. 1. [Xe] 4f 145d...</span>

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3 years ago