Explanation:
A substance burning in the presence of oxygen and leads to the formation of heat and light is called combustion.
Some important points about combustion are as follows:
- Fuel should be present for burning.
- Air should be present for the supply of oxygen.
- There should be heat (or ignition temperature) to initiate the chemical reaction.
Answer:
c
Explanation:
hydrogen Bond exist between ammoia, hydrogen fluoride and water so the answer is c
The correct answer is option C
The correct option is D.
Nowadays, scientists classified substances into four states of matter, which are: solid, liquid, gases and plasma. Plasma are hot ionized gas that is made up of equal number of positively and negatively charged ions. The ions in the plasma have very high kinetic energy which allow them to move around at high speed. Plasma is typically produce by heating gases to very high temperature.
Answer:
The answer to your question is 159.0 grams
Explanation:
data
mass of K₂O = ?
mass of K = 132 g
Process
1.- Balance the chemical reaction
Chemical reaction
K(s) + O₂ ⇒ K₂O
Reactants Elements Products
1 K 2
2 O 1
This reaction is unbalanced
4K(s) + O₂ ⇒ 2K₂O
Reactants Elements Products
4 K 4
2 O 2
Now the reaction is balanced
2.- Calculate the mass of K₂O
Atomic mass of K = 39 x 4 = 156 g
Molar mass of K₂O = 2[(39 x 2) + 16] = 188 g
156 g of K ------------------ 188 g of K₂O
132 g of K ----------------- x
x = (132 x 188) / 156
x = 159.0 grams