Answer: d
explanation: in both reactants and products there are 2 hydrogen and 2 chlorine atoms
Answer:
Cl is chloride I think, and NaCl is a salt molecule
Boyle's law of ideal gas: This law states that the volume of a gas is inversely proportional to its pressure at a constant temperature. Acc to this law we can write the relation of pressure and volume as:
That means:
From that equation we can calculate Volume of gas at a certain pressure:
P₁=Initial pressure
V₁=Initial volume
P₂=Final pressure
V₂= Final volume
Here P₁, initial pressure is given as 85.0 kPa
V₁, initial volume is given as 525 mL
P₂, final pressure is 65.0 kPa
so,
V_{2}=85\times 525\div 65
=686 mL
Volume of gas will be 686 mL.
Answer: 3.06m/s
Explanation:
Distance covered by swimmer = 220 m
Time taken by swimmer = 72 s.
Velocity = ?
Recall that velocity is the rate of change of distance per unit time. it is measured in metres per second.
Velocity = Distance / time taken
Velocity = 220m / 72seconds
Velocity = 3.055 m/s (approximate to 3.06m/s)