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yuradex [85]
3 years ago
7

What is the mass of lead in 452 g PbCl2?

Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
4 0

335.664 grams is the mass of lead in 452 grams of PbCl2.

Explanation:

Data given:

mass of lead in PbCl2 = 452 grams

mass of lead =?

atomic mass of PbCl2 = 278.1 grams/mole

atomic mass of Pb = 207.2 grams/mole

atomic mass of chlorine = 35.45 grams/mole

From the chemical formula of PbCl2 it is deduced that 1 mole of lead chloride contains 1 mole of Pb cation and 2 moles of chloride anion

number of moles of PbCl2 provided are:

number of moles = \frac{mass}{atomic mass}

number of moles = 1.62 moles of PbCl2 is provided

so when 1 mole of PbCl2 contains 1 mole of lead

then 1.62 moles of PbCl2 will have 1.62 moles of lead

mass = atomic mass x number of moles

mass of lead = 1.62 x 207.2

mass of lead = 335.664 grams

335.664 grams of lead is present in a sample of lead chloride having mass of 452 grams.

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1. Consider the following: h2so4 2 naoh → na2so4 2 h2o if a 24. 0 ml sample of h2so4 (aq) was neutralized by 20. 0 ml of 0. 125
jasenka [17]

The molarity of the acid sample H₂SO₄ is 0.052M .

<h3>What is Molarity ?</h3>

Molarity (M) is the amount of a substance in a certain volume of solution.

Molarity is defined as the moles of a solute per liters of a solution.

Molarity is also known as the molar concentration of a solution

Now to determine the molarity of the acid sample

V( H₂SO₄) = 24.0 mL in liters = 24.0 / 1000 = 0.024 L

M(H₂SO₄) = ?

V(NaOH) = 20.0 mL = 20.0 / 1000 = 0.02 L

M(NaOH) = 0.125 M

Number of moles NaOH :

n = M x V

n = 0.125 x  0.02

n = 0.0025 moles of NaOH

H₂SO₄(aq) + 2 NaOH(aq) = Na₂SO₄(aq) + 2 H₂O(l)

1 mole H₂SO₄ ---------- 2 mole NaOH

? mole H₂SO₄ ---------- 0.0025 moles NaOH

moles = 0.0025 * 1 / 2

= 0.00125 moles of H₂SO₄

M(H₂SO₄) = n / V

M = 0.00125 /  0.024

= 0.052 M

Therefore the molarity of the acid sample H₂SO₄ is 0.052M .

To know more about molarity

brainly.com/question/12127540

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In the Hall-Heroult process, a large electric current is passed through a solution of aluminum oxide Al2O3 dissolved in molten c
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Explanation:

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We will use the following relationships.

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The mass of Al produced is:

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Why is nucleus of an atom charged is negatively charged?
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Answer:

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