1.00 g of the oxide of metal X (atomic mass = 64) gave 0.80 g of the metal when reduced with hydrogen.
The formula of the oxide is?

altijjaneey

7 years ago

Datas Given from the question:
- Mass of oxide of the metal = 1g
- Atomic mass of the metal = 64g
- Mass of the metal on reduction with hydrogen = 0.8g
Therefore; mass of the oxide = mass of oxide of metal - mass of metal = 1 - 0.8 = 0.2g
To find the Empirical formula,
x. 0
0.8 0.2
divide each by it's atomic mass
0.8/64 = 0.0125 0.2/16= 0.0125
divide each by the smallest number
0.0125/0.0125 = 1 0.0125/0.0125 =1
Therefore, the formula of the of the metallic oxide

MrCorrect123

1 year ago

Short Method:

1. Mass of metal = 0.80 g


2. Atomic mass = 64
→ Moles of metal = 0.80 ÷ 64 = 0.0125 mol


3. Mass of oxygen = 1.00 − 0.80 = 0.20 g
→ Moles of oxygen = 0.20 ÷ 16 = 0.0125 mol


4. Ratio = Metal : Oxygen = 0.0125 : 0.0125 = 1 : 1



Answer: XO

Gabriel5632

1 year ago

Just know that is copper from the atomic number given and we know that the most stable oxidation state of copper is 2

godoski

9 years ago

Pls i need an explanation

MrCorrect123

1 year ago

Short Method:
1. Mass of metal = 0.80 g
2. Atomic mass = 64
→ Moles of metal = 0.80 ÷ 64 = 0.0125 mol
3. Mass of oxygen = 1.00 − 0.80 = 0.20 g
→ Moles of oxygen = 0.20 ÷ 16 = 0.0125 mol
4. Ratio = Metal : Oxygen = 0.0125 : 0.0125 = 1 : 1
Answer: XO

Chuksdev

9 years ago

Pls explanation is important here

AIIGA ALFRED

9 years ago

why is the formula is XO?

paulo_pulisic

2 years ago

To find the formula of the oxide, we need to determine the molar ratio of metal X to oxygen in the oxide.

Calculate the number of moles of metal X produced:
Molar mass of metal X
=
64
 
g/mol
Molar mass of metal X=64g/mol
Mass of metal X produced
=
0.80
 
g
Mass of metal X produced=0.80g
Number of moles of metal X
=
Mass
Molar mass
=
0.80
 
g
64
 
g/mol
=
0.0125
 
mol
Number of moles of metal X=
Molar mass
Mass

=
64g/mol
0.80g

=0.0125mol

Since the oxide of metal X produces 0.80 g of metal X, the remaining mass is due to oxygen:
Mass of oxygen
=
1.00
 
g
−
0.80
 
g
=
0.20
 
g
Mass of oxygen=1.00g−0.80g=0.20g

Calculate the number of moles of oxygen:
Molar mass of oxygen
=
16
 
g/mol
Molar mass of oxygen=16g/mol
Number of moles of oxygen
=
Mass
Molar mass
=
0.20
 
g
16
 
g/mol
=
0.0125
 
mol
Number of moles of oxygen=
Molar mass
Mass

=
16g/mol
0.20g

=0.0125mol

Determine the mole ratio of metal X to oxygen:
Metal X
:
Oxygen
=
0.0125
 
mol
:
0.0125
 
mol
Metal X:Oxygen=0.0125mol:0.0125mol

From the mole ratio, we can see that the formula of the oxide is XO.

So, the correct answer is B. XO.