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
weqwewe [10]
3 years ago
9

Convert the concentration of SO2 from 80 μg/m3 to units of parts per million. The gas has a temperature of 25˚C and a pressure o

f 101.325 kPa. (Problem 2-56)
Chemistry
2 answers:
Ivahew [28]3 years ago
4 0

Answer:

0.031 parts per million

Explanation:

80 micrograms/m^3 = 80 micrograms/m^3 × 1m^3/1000L = 0.08 micrograms/L

Concentration in parts per million = concentration in micrograms/L × molar volume/MW

Concentration in micrograms/L = 0.08

Molar volume at 25°C and 101.325kPa (1 atm) is 24.45L

MW of SO2 = 64g/mole

Concentration in ppm = 0.08×24.45/64 = 0.031 ppm

Ivanshal [37]3 years ago
4 0

Answer:

0.0306 ppm

Explanation:

Parts per million is defined as the mass of a solute in milligram per 1 liter of solvent. It is also a unit of concentration of a solution.

From the definition,

1 mg/l = 1 ppm

Converting μg/m3 to mg/l,

1 μg = 10^-6 g

Therfore, 1 mg = 10^3 μg

= 80 μg/m3 * 1 mg/10^3 μg

= 0.08 mg/m3

Molecular weight of SO2 = 32 + (16*2)

= 64 g/mol

Concentration (in ppm) = (concentration (mg/m3) * 24.45)/molecular weight of SO2

24.45 = volume (liters) of a mole (gram molecular weight) of a gas when the pressure is at 1 atmosphere (760 torr or 760 mm Hg) and at 25°C. where R is the ideal gas constant; T is the temperature in kelvins (273.16 + T°C); and P is the pressure in mm Hg.

= (0.08 * 24.45)/64

= 0.0306 ppm

You might be interested in
In Philip’s French class, the students are learning how to pronounce closed vowels and open vowels. The students are most likely
Sladkaya [172]

Answer:

It sounds like they are studying French phonemes

Explanations:

I just learned this.

7 0
3 years ago
Read 2 more answers
What type of mirror should be used for this application? Explain why this mirror is the right choice for a telescope.
Artyom0805 [142]

Answer:

use a concaved miror

Explanation:

better and more clear

7 0
2 years ago
Isooctane, C8H18, is the component of gasoline from which the term octane rating derives.
lina2011 [118]

Answer:

a) C₈H₁₈ + (23/2)O₂ -----> 8CO₂ + 9H₂O

b) Mass of CO₂ produced annually from this combustion of isooctane gasoline = 1.12 × 10⁵ Kg

c) CO₂ produced from the combustion of the gasoline in a year will occupy 5.632 × 10⁷ L

d) There needs to be a minimum of 1.752 × 10⁷ moles of air and 3.92 × 10⁸ L of air for the oxygen to be in excess all through the year of gasoline combustion.

Explanation:

a) C₈H₁₈ + (23/2)O₂ -----> 8CO₂ + 9H₂O

b) C₈H₁₈ has a density of 0.792 mg/L.

Since density = mass/volume;

mass = density × volume

Mass of C₈H₁₈ with 4.6 x 10^10 L volume = 0.792 × 4.6 x 10^10 = 3.643 × 10^10 mg = 3.643 × 10⁷ g.

To obtain the mass of CO₂ produced, we need the number of moles of C₈H₁₈ that burned.

Number of moles = mass/molar mass

Molar mass of C₈H₁₈ = (8×12) + 18 = 114g/mol

Number of moles of C₈H₁₈ = (3.643 × 10⁷)/114 = (3.2 × 10⁵) moles.

From the chemical reaction,

1 mole of C₈H₁₈ burns to give 8 moles of CO₂

(3.2 × 10⁵) moles will give 8 × 3.2 × 10⁵ = (2.56 × 10⁶) moles of CO₂

Mass of CO₂ produced = number of moles × Molar mass

Molar mass of CO₂ = 44 g/mol

Mass of CO₂ produced = 2.56 × 10⁶ × 44 = 1.12 × 10⁸ g = 1.12 × 10⁵ kg

c) 1 mole of any gas at stp occupies 22.4L

2.56 × 10⁶ moles of CO₂ will occupy 2.56 × 10⁶ × 22.4 = 5.632 × 10⁷ L

d) 1 mole of C₈H₁₈ requires 23/2 moles of O₂ for complete combustion yearly.

3.2 × 10⁵ moles would require 3.2 × 10⁵ × 23/2 = 3.68 × 10⁶ moles of O₂

O₂ makes up 21% of the air

That is,

0.21 moles of O₂ would be contained in 1 mole of air

3.68 × 10⁶ moles of O₂ would be contained in (3.68 × 10⁶ × 1)/0.21 = 1.752 × 10⁷ moles of air.

1 mole of any gas at stp occupies 22.4L

1.752 × 10⁷ of air will occupy

1.752 × 10⁷ × 22.4/1 = 3.92 × 10⁸ L of air!

3 0
3 years ago
An element X on reacting with oxygen forms an oxide X2O. this oxide dissolves in water and turns blue litmus red. a) Identify th
galben [10]

Answer:

The unknown element is Carbon.

(a) X is Carbon, its oxide is of acidic nature

(b) C+ O2 → CO2

Explanation:

We are given an unknown element that reacts with oxygen.

X + O2 → XO2

It is given that the oxide XO2 turns blue litmus red which is shown by acids, so XO2 is an acidic oxide. Also X will be a Non metal because Non metallic oxide is Acidic in nature.

The Oxide XO2 is dissolving is water. The oxide upon reacting with water will give an Acid.

XO2 type of oxide is found in the 14th group of the periodic table generally

So we have options like C, Si and Ge as these only have the Acidic oxide.

But when it comes to reactivity with water Only Carbon satisfies the need so the unknown element X is C.

CO2 + H2O → H2CO3 which is an acid.

(a) Element X is Carbon (C), The nature of the compound formed is Acidic.

(b) The reaction given will be as follows

     C+ O2 → CO2

Therefore the unknown element is Carbon.

4 0
3 years ago
Help me with this Living Environment question, I don't get it.
Ket [755]

City

<u>Explanation:</u>

The best analogy to explain the functions performed by a cell is by comparing it to a city.

Just like the city performs a multitude of task by housing critical elements like powerhouse, restaurants, transportation else, same way cell to performs similar functions for the body.

E.g.

  • In cell “Mitochondria” provides it with energy or the power in the same way “powerhouse” provides power to the city
  • Golgi bodies work as a car for transporting proteins to other parts of the cell.  

8 0
3 years ago
Other questions:
  • The question is below
    8·1 answer
  • You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 ∘c) is 0∘a, and the boiling point
    11·2 answers
  • ribose is an important sugar that is found in DNA and RNA.Ribose has a molar mass of 150g/mol,and a percent composition of 40.0%
    9·1 answer
  • Which of the following ions is a polyatomic ion?
    14·1 answer
  • CHEMISTRY HELP! Lewis structure rules<br><br> Please help, is this correct?
    7·1 answer
  • How many Joules are present in 7401 kJ?
    5·1 answer
  • The regular sequence of growth and division that cells undergo is called the?
    10·1 answer
  • Elaine's teacher gave her two cubes and asked her to record as many observations as possible. The data table of her observations
    10·1 answer
  • Mountains are often found along the ocean coastline of the United States. Explain two ways that the hydrosphere affects the geos
    10·1 answer
  • An example of polytamic anoin would be a. Ca+2 b. NH4+ c. F d. PO4-3
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!