M&m balancing how many hydrogen candoed are on the left side of the arrow

What’s the question

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

Adialysis unit requires 78.5 l of water.the estimated digit is 5. 

The answer is d) light rays pass through mirrors at an angle.