Answer: Option (b) is the correct answer.
Explanation:
When it rains, then mud in the backyards become wet. It is known that earthworms live inside earth and diffusion of oxygen gets slower through water than through air.
As a result, supply of oxygen to the worms decreases in wet mud hence, they come to the surface in order to breathe.
Thus, we can conclude that wet mud in the backyard most likely formed the earthworms.
Answer: Wheel and axle
Explanation:
Wheel and axle is the best answer. Technically that's not the primary part that steers a vehicle though. A pulley is in the engine and I've never heard of wedge and first class lever. The question isn't too clear, but yea, I would pick ii if I was in your spot.
Answer:
Explanation:-
Osmotic pressure is a colligative property which depends on the amount of solute added.
= osmotic pressure = 5.1 atm
C= concentration in Molarity
R= solution constant = 0.0821 Latm/Kmol
T= temperature = 312 K
Thus the equation for calculating the molarity of this solution is
Answer:
1.81 g of Benzoic Acid
Solution:
The balance chemical equation is as follow,
C₇H₅O₂Na + HCl → C₇H₆O₂ + NaCl
According to equation,
144.11 g (1 mole) C₇H₅O₂Na produces = 122.12 g of C₇H₆O₂
So,
2.14 g of C₇H₅O₂Na will produce = X g of C₇H₆O₂
Solving for X,
X = (2.14 g × 122.12 g) ÷ 144.11 g
X = 1.81 g of C₇H₆O₂