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Triple Science > Chemistry > Flashcards

Chemistry Flashcards

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1
Q

What is an atom?

A

An atom is the smallest part of an element that can exist. Atoms are made of 3 types of subatomic particles ;
Protons = +1 charge : relative mass = 1 amu
Neutrons = +0 charge : relative mass = 1 amu
Electrons = -1 charge : relative mass = 1/2000 amu

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2
Q

What does amu stand for?

A

Atomic mass unit

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3
Q

What is a molecule?

A

It is a small group of atoms covalently bonded.

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4
Q

What is an element?

A

It is a pure substance made up of only 1 type of atom. It cannot be broken down chemically into any simpler substance. It is organised in increasing atomic number in the periodic table.

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5
Q

What is a covalent bond?

A

It is between non-metals only

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6
Q

What is an ionic bond?

A

Metal and non-metal

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7
Q

What is a metallic bond?

A

Bond in a pure metal

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8
Q

What is a compound?

A

Two or more different elements chemically bonded

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9
Q

What is a mixture?

A

It is an impure substance that is made of 2 or more different substances that are not chemically bonded

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10
Q

What is a hydrocarbon?

A

It is a molecule / compound mode of only hydrogen and carbon

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11
Q

What is the formula of ethene?

A

C2 H4

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12
Q

What is the formula of ethane?

A

C2 H6

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13
Q

What acid is made from chloride and what is the formula?

A

Hydrochloric acid
Hcl

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14
Q

What acid is made from nitrate and what is the formula?

A

Nitric acid
HNO3

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15
Q

What acid is made from sulfate and what is the formula?

A

Sulfuric acid
H2 SO4

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16
Q

What acid is made from phosphate and what is the formula?

A

Phosphoric acid
H3 PO4

17
Q

What acid is made from ethanoate and what is the formula?

A

Ethanoic acid
CH3 COOH

18
Q

What is the equation of a mole?

A

n(mol) = m(g) / Mr(g/mol)

19
Q

Much much is 1 mole?

A

6.02 x 10^23

20
Q

What is another name for one mole?

A

Avogadro’s number

21
Q

Balance this equation :
CuO + H2SO4 + H2O = CuSO 5H2O

A

1CuO + 1H2SO4 + 4H2O = 1CuSO 5H2O

22
Q

What is the ratio of chlorine atoms to particles?
FeCl3

A

3:1

23
Q

How many moles of oxygen would you have in Fe2O3?

A

3 moles of oxygen = 1 mole of Fe2O3

24
Q

What is the mr of sodium chloride?
Na = 23
Cl = 35.5

A

1x23
1x35.5
= 58.5 g/mol

25
Q

How many moles in 1.5g of Sodium Iodine, NaI

A

1 x 23 = 23
1 x 127 = 127
150 g/mol
1.5 / 150 = 0.01

26
Q

What is the formula of carbonic acid

A

H2 CO3

Triple Science (4 decks)

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