In the ray diagrams of concave and convex mirrors, we see that the image formed is either real or virtual, Give two differences between a real image and a virtual image?

he image formed by the spherical mirror can be either real or virtual. Spherical mirrors are of two types: Convex mirrors; Concave mirrors. Concave Mirrors

Explanation:

1.cause they have wings

2.cause they are insects

3.cause they are

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.