C. a long chain of carbon atoms with hydrogen atoms attached to them.
Explanation:
Answer:
3)Some gas molecules move further apart and some move closer together.
Explanation:
because When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. The particles exert more force on the interior volume of the container. This force is called pressure. There are several units used to express pressure.
To separate off different products in order of their boiling points. You do it by a process of heating and cooling in a horizontal condenser usually.
Answer:
21 neutrons
Explanation:
There are 21 neutrons in Pottasium-40
Answer:
∆H or Enthalpy of the reaction
Explanation:
If ∆H is +ve
- Reaction is exothermic
- Example:-Combustion, mixing sodium/potassium in water
If ∆H is -ve
- Reaction is endothermic
- Ex:-Melting of ice
