1. Balance the following equations: (a) K + MgBr2 KBr + Mg
(b) CH4 + O2 CO2 + H2O
[Total: 2]

2. Write a balanced chemical equation for the following,
including state symbols:
a) An aqueous solution of barium chloride reacts with a dilute solution
sodium sulphate to from a precipitate of barium sulphate
and an aqueous solution of sodium chloride.
b) Write the ionic equation for the reaction in 2 (a).

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

Many free radicals combine to form molecules that do not contain any unpaired electrons. the driving force for the radical–radical combination reaction is the formation of a new electron‑pair bond. consider the chemical equation. n(g)+no(g)⟶nno(g) n(g)+no(g)⟶nno(g) write lewis formulas for the reactant and product species in the chemical equation. include nonbonding electrons. n(g)n(g) select draw rings more erase select draw rings more erase select draw rings more erase n no(g)

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms