basics

Question 1

What is the formula (with charge) of Ammonium?

Answer 1

(NH4)+

Question 2

What is the formula of silver?

Answer 2

Ag+

Question 3

What’s the formula of zinc?

Answer 3

Zn2+

Question 4

What’s the formula of hydroxide?

Answer 4

OH-

Question 5

What’s the formula of a nitrate?

Answer 5

NO3-

Question 6

What’s the formula of a carbonate?

Answer 6

(CO3)2-

Question 7

What’s the formula of a sulfate?

Answer 7

(SO4)2-

Question 8

What’s the atomic number?

Answer 8

The number of protons in the nucleus.

Question 9

What’s the mass number?

Answer 9

The number of protons and neutrons in the nucleus of an atom.

Question 10

What’s an isotope?

Answer 10

Atoms of the same element with the same number of protons but a different number of neutrons.

Question 11

What’s relative isotopic mass (mass number)?

Answer 11

The mass of an isotope compared with 1/12th mass of an atom of carbon-12.

Question 12

What’s relative atomic mass?

Answer 12

The weighted mean mass of an atom compared with 1/12th mass of an atom of carbon-12.

Question 13

When doing water of crystallisation what can we do to reduce the percentage uncertainty?

Answer 13

Use equipment with higher resolution, repeat with a larger mass.