Question

d. potassium + iodine →
6. Fill in the missing elements from these word equations:
14
]
... + oxygen → calcium oxide
beryllium + .................. ................ →
beryllium bromide
....... → copper oxide
[4]
Please help

Answer 1

Answer:

The missing reagents are.

Potassium + Iodine = Potassium iodide

Calcium + oxygen = Calcium oxide

Beryllium + Bromine = Beryllium bromide

Copper + Oxygen = Copper oxide

Explanation:

The balanced equation can be written as:

1.Potassium + Iodine = Potassium iodide

$2K(s)+I_{2}(s)\rightarrow 2KI(s)$

Here K = potassium

I2 = Iodine

KI = potasssium iodide.

2.Calcium + oxygen = Calcium oxide

$2Ca(s)+O_{2}(g)\rightarrow 2CaO(s)$

Ca = calcium

O2 = oxygen

CaO = Calcium Oxide

3.Beryllium + Bromine = Beryllium bromide

$Be(s)+Br_{2}(g)\rightarrow BeBr_{2}(s)$

Here,

Be = beryllium

Br2 = bromine

BeBr2 = Beryllium Bromide

4. Copper + Oxygen = Copper oxide

$2Cu(s)+O_{2}(g)\rightarrow 2CuO(s)$

Cu = Copper

O2 = oxygen

CuO = Copper Oxide