2elements don't take part in covalent bonding

What state of matter is ice a. liquid b. element c. solid d. gas

Nitrogen dioxide decomposes according to the reaction 2 no2(g) ⇌ 2 no(g) + o2(g) where kp = 4.48 × 10−13 at a certain temperature. if 0.70 atm of no2 is added to a container and allowed to come to equilibrium, what are the equilibrium partial pressures of no(g) and o2(g)

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?