How can the mantle flow by convection if it is a solid?

C3h8o3 - glycerol major species present when dissolved in water

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5