The Mole & Equations

Question 1

What’s the formula for finding the number of moles from the number of atoms or molecules?

Answer 1

Number of moles = number of particles you have / number of particles in a mole ( avo’s constant)

Question 2

What is the molar mass the mass of?

Answer 2

One mole of something (the same as the relative molecular mass)

Question 3

What is the moles, mass, Mr formula?

Answer 3

Number of moles= mass of substance/molar mass

Question 4

What is the concentration of a solution?

Answer 4

Now many moles are dissolved per 1 dm cubed of solution

Question 5

How many cubic centimeters are in one cubic decimeter?

Answer 5

1000

Question 6

What’s the ter mela connecting number of moles & concentration?

Answer 6

Number of moles = concentration (moldm^-3x volume (dm^3)

Question 7

What types of reactions can be written as ionic equations?

Answer 7

Any reaction involving ions that happens in solution

Question 8

What’s the definition of relative isotopic mass?

Answer 8

This is the mass of one atom of a given isotope of an element on a scale where one atom of the isotope carbon-12 is exactly 12

Question 9

What is the definition of isotopes?

Answer 9

Atoms with the same number of protons, but with a different number of neutrons

Question 10

What is the definition of a mole?

Answer 10

One mole of a substance is the amount of that substance that contains the same number of particles as there are atoms in exactly 12g of carbon-12 (6.02 x10^23 - avo’s constant)

Question 11

What is the definition of relative atomic mass?

Answer 11

The average mass of one atom of the element, taking into account a,k of the isotopes and their abundances, on a scale where one atom of the isotope carbon-12 is exactly 12