Question

A sample of phosphorus trichloride ( PCl3 ) contains 1.4 moles of the substance. How many atoms are there in the sample ?
A) 4 B) 5.6 C) 8.431 * 1023 D) 3.36 * 1024

Answer 1

If there are 1.4 moles then number of atoms would be

moles * Avogadro's number

= 1.4 × 6.022 × 10^23

atoms = 8.431 × 10^23 × 4( atoms asked )

=3.36 × 10^24.

Hope it helps!

Answer 2

The number of atoms in the sample of Phosphorus Trichloride are $3.36 \times 10^2^4.$.

Given:

• The number of moles in phosphorus trichloride or $PCl_3$ are 1.4.

• The formula for the whole number of atoms is provided by the particular number of moles multiplied by the universal Avogadro Number.

Solution:

• Therefore the 1.4 moles present need to be divided by the universal Avogadro number which is equivalent to$6.022 \times 10^2^3.$.

• Therefore$1.4 * 6.022 * 10^2^3 =8.431$.

• Now we need to multiply this by 4 as those are the number of atoms in each molecule of the compound $PCl_3$.

• Therefore $8.431 \times 4 = 3.36\times 10^2^4$ which is the whole number of atoms in the sample of compound Phosphorus Trichloride.

Learn more about conversionof moles to atom

Convert into mole. (a) 12 g of oxygen gas (b) 20 g of water (c) 22 g of carbon dioxide

https://brainly.in/question/1301685

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?

https://brainly.in/question/1301678