Ask question

Ask question

All categories

3 years ago

7

Lead (Pb) is used to make a number of different alloys. What is the mass of lead present in an alloy containing 0.15 mol of lead

?

1 answer:

Vesna [10]3 years ago

3 0

Lead is 207.2 g/mol.
$0.15 mol (\frac{207.2g}{mol}) = 31.08 g Pb$

You might be interested in

The science of molecules and and their is called chemistry

GarryVolchara [31]

Is this supposed to be a question?????

6 0

3 years ago

Read 2 more answers

1. A gas having the following composition is burnt under a boiler with 50% excess air.

jeka94

The composition of the stack gas are :

$CH_4$ = 0.8713

$C_3H_8$ = 0.0202

CO = 0.107

<h3 /><h3>What is a mole fraction?</h3>

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of $CH_4$ : 70% of 100 g = 70 g

Mass of $C_3H_8$ : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of $CH_4$ : $\frac{70 g}{16.04 g/mol}$ = 4.3 mole

Number of moles of $C_3H_8$ : $\frac{15 g}{144.1 g/mol}$ = 0.10 mole

Mass of CO : $\frac{15 g}{28.01 g/mol}$ = 0.53 mole

Now to calculate the mole fraction of each we use the formula:

Mole fraction of $CH_4$ : $\frac{4.3}{4.935}$ = 0.8713

Mole fraction of $C_3H_8$ : $\frac{0.10}{4.935}$ = 0.0202

Mole fraction of CO : $\frac{0.53}{4.935}$ = 0.107

Hence, composition of the stack gas are:

$CH_4$ = 0.8713

$C_3H_8$ = 0.0202

CO = 0.107

Learn more about mole fraction here:

brainly.com/question/13135950

#SPJ1

8 0

2 years ago

Who inspires you? Who do you aspire to be like?

Alex17521 [72]

Answer: this seems like YOU need to answer on ur own.

Explanation:

7 0

3 years ago

Read 2 more answers

What is wrong with the statement below?

pychu [463]

All chemicals can cause harm. When only a very large amount of the chemical can cause damage, the chemical is considered to be practically non-toxic. When a tiny amount is harmful, the chemical is considered to be highly toxic.

6 0

3 years ago

Why aluminium is used to make aeroplanes

liberstina [14]

Answer:

Aluminum (blended with small quantities of other metals) is used on most types of aircraft because it is lightweight and strong. Aluminum alloys don't corrode as readily as steel. It has also been used for the skin of some high-speed airplanes, because it holds its strength at higher temperatures better than aluminum.

HOPE THIS HELPED!!!!!!!!!XDDD

6 0

3 years ago