Question

Determine how many particles are in a 78 mole sample of any substance.

Use the equation: particles= mole (given in the problem) x Avogadro's number (6.022 x 10²³)

7.7 x 10²¹

6.022 x 10²³

78 x 10²³

4.7 x 10²⁵

Determine the number of moles of Alumium is a sample that contains 4.56 x 10²⁶ particles.(remember to always put your values in parentheses)

757 moles
0.031 moles
6.022 x 10²³ moles
27 moles

The mass of 1 mole of any substance equals its (BLANK)

Determine the number of particles in a sample of copper containing 0.500 moles.

63.6 x 10²³ particles
31.78 x 10²³ particles
3.011 x 10²³ particles
12.04 x 10²³ particles

Determine the number of moles is a sample of oxygen containing 2.56 x10¹⁹ particles. (Remember to put your values in parentheses.)

2,3161 moles
1.54 x 10⁴⁷ moles
6.022 x 10²³ moles
0.0000425 moles

Which would take up more space: a mole of Gold atoms or a mole of Lithium atoms?

mole of Lithium atoms
mole of Gold atoms
they would be equal

Avogadro's Number refers to:

One gram of any element, compound or substance is equal to 6.02 x 10²³ atoms, molecules or formula units.

One mole of any element, compound or substance is equal to 6.02 x 10²³ atoms, molecules or formula units.

One mole of any element, compound or substance is equal to 6.02 x 10²³ atoms, molecules or formula units.

One atom has 6.02 x 10²³ grams

Avogadro's number of atoms of any element is equivalent to

6.02 x 10²³ particles
the atomic number of that element
the mass number of that element
100 g of that element

1 mole of H₂O equals to:

Both 2 and 3
6.02 x 10²³ molecules
18 atoms
18 grams

Answer 1

In 1 mole of any substance, there are = 6.022 x 10²³ particles/ mole
In 78 mole of any substance, there are = 78 mole x 6.022 x 10²³ particles/ mole
= 4.7 x 10²⁵ particles.

In 1-mole Aluminium sample contains = 6.022 x 10²³ particles/ mole
Therefore moles of aluminium in 4.56 x 10²⁶ particles = 4.56 x 10²⁶ particles/ (6.022 x 10²³ particles/ mole)
= 757 moles

The mass of 1 mole of any substance equals its Molecular weight/ Molar mass.

Number of particles in a sample of copper containing 1 mole = 6.022 x 10²³ particles/ mole
No. of particles in 0.5 mole copper = (0.5 mole) x (6.022 x 10²³ particles/ mole)
= 3.011 x 10²³ particles

No. of moles in a sample of oxygen containing 2.56 x10¹⁹ particles
= (2.56 x10 ¹⁹ particles)/  (6.022 x 10²³ particles/ mole)
= 0.0000425 moles
A mole of Gold atoms will take more place. Since we have same no of atoms of both gold and lithium however, the size of the gold atom is larger than that of lithium atom.

Avogadro's Number refers to:
One mole of any element, compound or substance is equal to 6.02 x 10²³ atoms, molecules or formula units.

Avogadro's number of atoms of any element is equivalent to 6.02 x 10²³ particles.

1 mole of H₂O equals to 18 grams. 1 mole of H2O equals to 6.02 x10²³ molecules of H₂O.