In which two groups are mixtures classified? *

Chlorine has two naturally occurring isotopes, 35C1 Gsotopic mass 34.9689 amu) and 370 (isotopic mass 36.9659 amu). If chlorine

Lilit [14]

Answer: The percentage abundance of $_{17}^{35}\textrm{Cl}$ and $_{17}^{37}\textrm{Cl}$ isotopes are 75.77% and 24.23% respectively.

Explanation:

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$ .....(1)

Let the fractional abundance of $_{17}^{35}\textrm{Cl}$ isotope be 'x'. So, fractional abundance of $_{17}^{37}\textrm{Cl}$ isotope will be '1 - x'

For $_{17}^{35}\textrm{Cl}$ isotope:

Mass of $_{17}^{35}\textrm{Cl}$ isotope = 34.9689 amu

Fractional abundance of $_{17}^{35}\textrm{Cl}$ isotope = x

For $_{17}^{37}\textrm{Cl}$ isotope:

Mass of $_{17}^{37}\textrm{Cl}$ isotope = 36.9659 amu

Fractional abundance of $_{17}^{37}\textrm{Cl}$ isotope = 1 - x

Average atomic mass of chlorine = 35.4527 amu

Putting values in equation 1, we get:

$35.4527=[(34.9689\times x)+(36.9659\times (1-x))]\\\\x=0.7577$

Percentage abundance of $_{17}^{35}\textrm{Cl}$ isotope = $0.7577\times 100=75.77\%$

Percentage abundance of $_{17}^{37}\textrm{Cl}$ isotope = $(1-0.7577)=0.2423\times 100=24.23\%$

Hence, the percentage abundance of $_{17}^{35}\textrm{Cl}$ and $_{17}^{37}\textrm{Cl}$ isotopes are 75.77% and 24.23% respectively.

6 0

2 years ago

Burning gas on a stovetop transforms chemical energy into what other types of energy?

svp [43]

Answer:

Burning gas on a stove top transforms chemical energy into thermal energy.

Explanation:

Cooking food involves in two types of energies. They are chemical energy and thermal energy. 

We use gas for a gas stove.Here gas is chemical energy.when we light the stove the fire lits up and here the chemical energy energy is converted into thermal energy.

Breaking and combining of bonds during combustion gives heat and light.This thermal energy heats the vessels and cooks the food through the process of conduction, convection and radiation. 

3 0

3 years ago

[H2O] = 0.077 M

salantis [7]

Cl₂O + H₂O ⇄ 2HClO

K = [HClO]²/[Cl₂O][H₂O]
K = (0,023)²/(0,077×0,077)
K = 0,000529/0,005929
K ≈ 0,0892

:)

7 0

3 years ago

What is the mass of 5.50 mol of pure liquid bromine ?

GREYUIT [131]

Answer:

m Br = 439.472 g

Explanation:

mass Br = ?

∴ mol Br = 5.50 mol

∴ molar mass Br 79.904 g/mol

mass = (mol)*(g/mol)

⇒ m Br = (5.50 mol)*(79.904 g/mol)

⇒ m Br = 439.472 g

5 0

3 years ago

What happens when uranium mixes with iodine?

Ludmilka [50]

U + 2I₂ → UI₄ uranium (IV) iodide

2U + 3I₂ → 2UI₃ uranium (III) iodide

2UI₄ ⇄ 2UI₃ + I₂

3 0

3 years ago