Plz help! This question is due in 10 mins! Calculate the density of a 5cm3 cube of iron with a mass of 100 g

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8

Define a is a tiny pavket of energy