How many moles of C8H18 contain 9.25 × 1024 molecules of C8H18 ?

1 answer:

3 0

One mole of any material contains 6.02 * 10e23 atoms or molecules. This is the Avogadro number. So 9.25 * 10e24 atoms are contained in (9.25*10e24 / 6.02 * 10e23) = 15.36 moles. So the answer is that moles of C8H18 is 15.36 moles

You might be interested in

If the pressure of 125 cm3 of nitrogen gas at 100 °c decreases from 885 torr to 225torr, what is the final volume? assume temper

navik [9.2K]

Suppose the Gas is acting ideally, Then, According to Ideal Gas Equation;

P₁ V₁ = P₂ V₂ ----- (1)
Data Given:
P₁ = 885 torr

V₁ = 125 cm³

P₂ = 225 torr

V₂ = ?

Puting values in eq, 1;

V₂ = P₁ V₁ / P₂

V₂ = (885 torr × 125 cm³) ÷ 225 torr

V₂ = 491.66 cm³

4 0

3 years ago

How far away is sirius from the sun in inches? ____ in miles? ____

earnstyle [38]

Answer:

the answer is 26.718 inches or

26.76 miles

6 0

3 years ago

What is the mass of arsenic that is contained in a 50.0 g sample if the concentration is 5 ppm?

faltersainse [42]

Answer: The mass of arsenic found in the sample is 0.25 mg

Explanation:

ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.

To calculate the ppm of oxygen in sea water, we use the equation:

$\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6$

Both the masses are in grams.

We are given:

Concentration of arsenic = 5 ppm

Mass of sample = 50 g

Putting values in above equation, we get:

$5=\frac{\text{Mass of arsenic}}{50g}\times 10^6\\\\\text{Mass of arsenic}=\frac{5\times 50}{10^6}=0.00025g=0.25mg$

Conversion factor used: 1 g = 1000 mg

Hence, the mass of arsenic found in the sample is 0.25 mg

5 0

3 years ago

PLEASE ANSWER THIS FASTE LIKE RIGHT KNOW!!!!!

mamaluj [8]

The two strands of a DNA molecule must be separated

3 0

3 years ago

The stability of an isotope is based on its

sattari [20]

Option 4. ratio of electrons to protons

Isotope that has atomic number of 82 is stable. An element that has an atomic number ∠82 more stable except Tc and Pm. Also there is the concept that isotopes consisting a combination of even-even,even-odd,odd-even, and odd-odd are all stable. Many isotopes with no magic numbers of nucleons are stable

7 0

3 years ago