A loud classroom demonstration involves igniting a hydrogen filled balloon. The hydrogen within the balloon reacts explosively with oxygen in the air to form water. If the balloon is filled with a mixture of hydrogen and oxygen, the explosion is even louder than if the balloon is filled only with hydrogen-the intensity of the explosion depends on the relative amounts of oxygen and hydrogen gas within the balloon. Look at the molecular views representing different amounts of hydrogen and oxygen gas in four different balloons of equal size. Based on the balanced chemical equation (you will have to write one), which balloon will make the loudest explosion

Hey there!

balanced chemical reaction:

2 H₂ (g) + 1 O₂ ( g )  > 2 H₂O ( g )

Reagents :

H = 2 * 2 = 4

O = 1 * 2 =  2

total = 4 + 2 => 6

Products:

H = 2 * 2 = 4

O = 2 * 1 = 2

total = 4 + 2 => 6

Hope this helps

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

the answer is c.the valence of the atoms combine .