1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Makovka662 [10]
3 years ago
12

A particular air sample at 1 atm pressure has a density of ~ 1.3 g/L and contains SO2 at a concentration of 25 ug/m3. What is th

e concentration in terms of the following units: a. Parts per million (mass SO2 per 106 units mass of air)? b. Moles SO2 per 100 mole of air?
Chemistry
1 answer:
andrey2020 [161]3 years ago
3 0

Answer:

a. 0.0192 ppm, and b. 8.70×10^{-7}

Explanation:

a. Calculation of parts per million (PPM) of SO2

The concentration of SO2 according to the question is 25 micrograms (ug) per 1 cubic meter (m3), so we need to convert both values to the same mass unit in order to calculate the parts per million. In this case, we will convert both values to grams:

25 ug = 25×10^{-6} g ......(i)

1 m3 = 1,000 L, but the density of the air is 1.3 g/L, so 1 L weighs 1.3 g. Using a rule of three:

1 L → 1.3 g

1,000 L → ?

? = 1,300 g

So, 1 m3 (cubic meter) of air weighs 1,300 g ......(ii)

Now we can calculate the parts per million by dividing the number of grams of SO2 (i) times the number of grams of air (ii) times 10^{6}:

PPM = (25×10^{-6} g)/(1,300 g)×10^{6} = 0.0192 ppm

b. Calculation of moles of SO2 per 100 mol of air

As we do not have any temperature mentioned in the question, we can not use the ideal gas equation to calculate the number of moles of air. So we will use the average weight of a mol of air, that is 28.97 g/mol

From (ii) we know that 1 m3 weighs 1,300 g, so we can apply a rule of three to get the number of moles we have in 1 m3:

28.97 g → 1 mol

1,300 g → ? moles of air

? = 1,300/28.97 = 44.874 moles of air

Also, from (i) we know that in 1 m3 of air we have 25×10^{-6} g of SO2. This amount can be expressed in moles by using the molar mass of SO2 that is 64 g/mol (S=32, O=16 and 32+2×16 = 64), using a rule of three:

64 g → 1 mol

25×10^{-6} g → ? moles of SO2

? = 3.91×10^{-7} moles of SO2

Now, we can calculate the moles of SO2 per 100 moles of air by doing the following:

moles of SO2 per 100 moles of air = (3.91×10^{-7})/(44.874)×100 = 8.70×10^{-7}

You might be interested in
How does a field experiment differ from a natural experiment?
Marina CMI [18]

Answer :   behavior in a field experiment is more likely to reflect real life because of its natural setting, i.e. higher ecological validity than a lab experiment

Explanation:

8 0
2 years ago
What is formed by the hydrolysis of Starch?
Ymorist [56]

Answer:

soluble starch, maltose and various dextrins.

Explanation:

3 0
3 years ago
Compared with gases, liquids: A. have stronger intermolecular attractions. B. have more space between their particles. C. are mu
Fiesta28 [93]
A. have stronger intermolecular attractions.
6 0
2 years ago
The alveoli are surrounded by __________ carrying blood to and from the heart.
natka813 [3]
The alveoli are surrounded<span> by tiny blood vessels, called capillaries. The </span>alveoli<span> and capillaries both have very thin walls, which allow the oxygen to pass from the </span>alveoli<span>to the blood. The capillaries then connect to larger blood vessels, called veins, which bring the oxygenated blood from the lungs to the heart.</span>
4 0
3 years ago
CaCO3 For each of the following compounds, decide whether the compound's solubility in aqueous solution changes with pH. If the
Slav-nsk [51]

Answer:

Hello attached below is the data found in Aleks Data tab

answer :

i) N0

ii) N0

iii) YES ,  pH of highest solubility = 5

Explanation:

i) For CuBr

solubility does not change with pH  hence answer = NO

ii) For MgCl2

solubility does not change with pH hence the answer = NO

iii) For Ba(OH) 2

Solubility does change with pH hence the answer = YES

and the pH at which the highest solubility will occur is = 5

attached below is the reason for the answers given

4 0
3 years ago
Other questions:
  • An organic compound always contains one or more atoms of ____________.
    8·1 answer
  • Hexanal would be soluble in water? True or false?
    9·1 answer
  • What is the maximum amount of kcl that can dissolve in 200 g of water? (the solubility of kcl is 34 g/100 g h?
    9·1 answer
  • 4. Calorimetry can be used to determine the specific heat capacity of different substances (not just metals). Using the online c
    10·1 answer
  • Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points.
    13·1 answer
  • The decomposition of nitrogen dioxide is described by the following chemical equation:
    6·1 answer
  • Find energy is the wavelength is 5.2x10^-7m (Show work)
    12·1 answer
  • Balanced chemical equation for formation of bleaching powder?​
    5·2 answers
  • Why do we need neutrons in the nucleus?
    8·1 answer
  • Motohiro felt chilled by the rainy afternoon. He decided to make a cup of hot tea. He let the tea leaves steep too long and the
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!