Given the following equation: 2h2o --> 2h2 +o2 what mass of oxygen would form from 2.30 moles of water? question options: 25.1 36.8 25.1 39.3

36.8 g of oxygen would form from 2.30 moles of water

Explanation:

According to given balanced equation, 2 moles of water forms 1 mole of oxygen

So moles of oxygen would form from 2.30 moles of water=

Molar mass of is 32 g/mol

So mass of would form=

hence 36.8 g of oxygen would form from 2.30 moles of water

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

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation: