Explanation;
Writing scientific notation :
Radius of the sun = 696,000.0 kilometer
Radius of the sun can also be written as =
Size of bacterial cell = millimeter
Size of bacterial cell can also be written as =
Answer: The correct answer is Option C.
Explanation:
We are given a piston of a pump, which means that there is no loss of the air. and there is a change in pressure and volume but temperature of the system remains constant.
As, the pressure of the system increases, there will be more number of particles. So, the number of collisions per unit area will increase.
But in the question, volume gets doubled. So, the pressure will be determined by using Boyle's Law:
where, are the initial and final volume respectively.
Putting the change in volume in above equation, we get:
where, are the initial and final pressure respectively.
As, the pressure is reduced to half of the initial pressure. So, the number of collisions per unit area will also be reduced to one-half.
Hence, the correct answer is Option C.
Volume of Ammonia(NH₃) = 22.4 L
<h3>Further explanation</h3>Given
Reaction
3CuO+2NH₃⇒ 3Cu + 3H₂O+ N₂
<em>In the problem, the CuO coefficient should be 3 not 2</em>
M CuO = 80
mass CuO = 120 g
Required
The volume of NH₃
Solution
mol CuO :
From the equation, mol ratio CuO : NH₃ = 3 : 2, so mol NH₃=
Assume at STP(0 °C, 1 atm) ⇒1 mol = 22.4 L, then volume of NH₃=22.4 L