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2 years ago

How many atoms of each element are in the chemical formula P2O5?

Chemistry

2 answers:

wariber [46]2 years ago

6 0

Answer:

$\boxed {\tt A. \ 2 \ phosphorus \ and \ 5 \ oxygen}$

Explanation:

We are given the chemical formula:

$\sf P_2O_5$

The subscript of 2 comes after the P. The element P is phosphorous, so there are 2 phosphorous atoms.

The subscript of 5 comes after the O. The element O is oxygen, so there are also 5 oxygen atoms.

Therefore the correct answer is A. 2 phosphorous and 5 oxygen

iris [78.8K]2 years ago

3 0

2 phosphorus and 5 oxygen atoms

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Calculate the mass percent for all components in a solution containing the following. 0.350 Kg of water, 5.4 moles of ammonia an

Alina [70]

Answer:

% Water = 54.96%

% Ammonia = 0.14%

% Cobalt (II) Nitrate = 30.62%

Explanation:

To calculate mass percent, first we need to calculate the total mass of the mixture:

Mass Water ⇒ 0.350 kg Water = 350 g water

Mass Ammonia⇒We use ammonia's molar mass⇒5.4 mol * 17 g/mol = 91.8 g

Mass cobalt (II) nitrate ⇒ 195.0 g

Total Mass = Mass Water + Mass Ammonia + Mass Cobalt Nitrate

Total Mass = 350 g+ 91.8 g+ 195 g = 636.8 g

To calculate each component's mass percent, we divide its mass by the total mass and multiply by 100:

% Water ⇒ 350/636.8 * 100% = 54.96%

% Ammonia ⇒ 91.8/636.8 * 100% = 0.14%

% Cobalt (II) Nitrate ⇒ 195/636.8 * 100% = 30.62%

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