Chemistry, 11.07.2019 19:00 donterriuscollier

How many cations are there in 40.0 g of sodium phosphate?

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Answer from: maxi12312345

Formula of sodium phosphate is Na_3PO_4

The molar mass of compound, M = 164 g /mol

Mass of compound, m = 30 g

Number of mol is mass of compound divided by its molar mass as below:

n = m /M

= 30 / 164 = 0.182 mol

Mole can be expressed as:

Number of particle /N_A = n = 0.182 mol

Number of particle = 0.182 * 6.02 * 10^23

= 1.1 * 10^23 molecule

As 3 sodium or cation are present in compound = 3 * 1.1 * 10^23 cation = 3.3 * 10^23 cation

Thus, 3.3 * 10^23 cation are present in 30 g sodium phosphate

Answer from: reganjones89

There are 4.41 × 10²³ cations in 40.0 g of sodium phosphate.

First, we will convert 40.0 g of Na₃PO₄ to moles using its molar mass (163.94 g/mol).

$40.0 g \times \frac{1 mol}{163.94 g} = 0.244 mol$

Then, we will convert 0.244 moles to molecules using Avogadro's number: there are 6.02 × 10²³ molecules of Na₃PO₄ in 1 mole of molecules of Na₃PO₄.

$0.244 mol \times \frac{6.02 \times 10^{23} molecule}{mol} = 1.47 \times 10^{23} molecule$

Sodium phosphate is a strong electrolyte that dissociates according to the following equation.

Na₃PO₄ ⇒ 3 Na⁺ + PO₄³⁻

As we can see, there are 3 Na⁺ cations per molecule of Na₃PO₄. The number of Na⁺ cations in 1.47 × 10²³ molecules of Na₃PO₄ are:

$1.47 \times 10^{23} molecule \times \frac{3Na^{+}cation }{1 molecule} = 4.41 \times 10^{23} Na^{+}cation$

There are 4.41 × 10²³ cations in 40.0 g of sodium phosphate.

You can learn more about Avogadro's number here:

Answer from: Quest

is it a purebred? it looks more like a red nose, but it doesn't have the red could it be a staffordshire bull terrior? unsure if that's the right name for it sorry

Ineed to know if my dog is a red nose or a blue nose pitbull- asap!

Answer from: Quest

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

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