true, in a stronger gravitational field the weight will be larger.

Formula mass of CaCO3 is
40 + 12 + 3-100amu....
100g CaCO3 = 1 mole..
50g of CaCO3 = 1÷ 100x 5 = 0.5mole...
<h3>Hence ,answer is 0.5mole...</h3>

Hope it helps you..
Thanks...
Answer:
Explanation:
A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole camera – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
Kinetic energy is produced when the amount of work done on an object relative to its change in energy.
Explanation:
A strong connection is present between within work as well as energy. When work is performed on an object energy is added along with it . Energy can be defined as ability to do certain amount of work on the other hand work means to change in energy . Kinetic energy is produced when the object is in moving position and potential energy is produced when the object is at resting position.