The bond angles marked a, b, and c in the molecule below are about , , and , respectively. Select correct answer. Select correct answer. 120°, 109.5°, 120° 90°, 90°, 90° 109.5°, 120, 109.5° 109.5°, 109.5°, 109.5° 109.5°, 109.5°, 90°

109.5°, 120°, 109.5°

Explanation:

The bond angles that are marked as a, b and c in the given molecules is in the order of :

Angle a : 109.5°

Nitrogen is hybridized and the geometry is tetrahedral. So the bond angle is 109.5°

Angle b : 120°

Carbon is hybridized, so the shape is trigonal planer and the bond angle is 120°

Angle c : 109.5°

Carbon is hybridized and the geometry is tetrahedral. The bond angle is 109.5°

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.

2b2t

explanation:

2b2t