Chapter 1: Q21P (page 22)

The concentration of the alkane $C_{20} H_{42}$ (FM 282.56) in a particular sample of rainwater is $0.2 p p b$ . Assume that the density of rainwater is close to $1.00 g / m L$ and find the molar concentration of $C_{20} H_{42}$ .

Short Answer

Expert verified

The molar concentration of $C_{20} H_{42}$ is $7.078 \times 10^{- 10}$

Step by step solution

Conversion of the alkane in g/L

Convert the concentration of the alkane from ppb to mg/L

$0.2 ppb = 0.2 \times 10^{- 3} mg / L = 2 \times 10^{- 4} mg / L$

$Img = 10^{- 3} g$ the mass of $C_{20} H_{42}$ is $2 \times 10^{- 7} g / L$

The value of the molar concentration

The molar concentration of $C_{20} H_{42}$ will be as follows:

$Molar concentration = \frac{number of}{volume in L} n = \frac{mass / formula mass}{volume in L} n = 2 \times 10^{- 7} g / 282.56 L = 7.078 \times 10^{- 10}$

Hence, the molar concentration of $C_{20} H_{42}$ is $7.078 \times 10^{- 10}$

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The concentration of the alkane $C_{20} H_{42}$ (FM 282.56) in a particular sample of rainwater is $0.2 p p b$ . Assume that the density of rainwater is close to $1.00 g / m L$ and find the molar concentration of $C_{20} H_{42}$ .

Short Answer

Step by step solution

Conversion of the alkane in g/L

The value of the molar concentration

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The concentration of the alkane C20H42(FM 282.56) in a particular sample of rainwater is 0.2ppb. Assume that the density of rainwater is close to1.00g/mLand find the molar concentration of C20H42.

Short Answer

Step by step solution

Conversion of the alkane in g/L

The value of the molar concentration

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

Ionic and Molecular Compounds

Inorganic Chemistry

Organic Chemistry

Kinetics

Chemical Reactions

The Earths Atmosphere

Study anywhere. Anytime. Across all devices.

The concentration of the alkane $C_{20} H_{42}$ (FM 282.56) in a particular sample of rainwater is $0.2 p p b$ . Assume that the density of rainwater is close to $1.00 g / m L$ and find the molar concentration of $C_{20} H_{42}$ .