Stoichiometry I
2H2 + O2 -> 2H2O
Moles of water produced from 5 moles of oxygen gas
10 moles of water
(5 mol O2) * (2 mol H2O/1 mol O2)
2H2 + O2 -> 2H2O
The limiting reagent if I have 2 moles of hydrogen gas and 2 moles of oxygen gas
Hydrogen gas
an ionic compound is always formed between a _____ and a _____
metal and nonmetal
this planet was discovered by William Herschel in 1781; it is also the third largest in our solar system
Uranus
2NH3 + H2SO4 -> (NH4)2SO4
The moles of sulfuric acid needed to fully react with 6 moles of ammonia
3 moles of sulfuric acid
2 moles of NH3 in reaction for every 1 mole of sulfuric acid, so 2:1 = 6:3
2H2 + O2 -> 2H2O
The limiting reagent if I have 3.1415 moles of hydrogen gas and 41.6 grams of oxygen gas
Oxygen gas
41.6 grams O2 = 1.3 moles
The group 16 or 6a elements are known as this
chalcogens
this type of tree leaf makes up the majority of the koala diet
eucalyptus
2H2 + O2 -> 2H2O
Grams of water produced from 3.1415 moles of oxygen gas
113.22 grams of water
(3.1415 moles O2) * (2 moles water/1 mole O2) * (18.02 grams water/1 mole water)
Fe + NaBr -> FeBr3 + Na
The above equation is unbalanced. The excess reagent given I have 250 grams of iron and 100 grams of sodium bromide
Fe + 3NaBr -> FeBr3 + 3Na
(250 grams Fe)*(1 mol Fe/55.845 g Fe)*(3 mol Na/1 mol Fe) = 13.43 moles of Na
(100 grams NaBr)*(1 mol NaBr/102.890 grams NaBr)*(3 mol Na/1 mol NaBr) = 2.92 moles of Na
Iron is the excess reagent
Every diatomic gas element
HONClBrIF
BrINClHOF
All appear in gaseous form as 2 (e.g. O2, H2, Br2...)
the medical term for bad breath
halitosis
2H2 + O2 -> 2H2O
Grams of water produced from 3.1415 grams of oxygen gas
3.5382 grams of water
(3.1415 grams O2) * (1 mol O2/32.0 grams O2) * (2 mol H2O/1 mol O2) * (18.02 grams H2O/1 mol H2O)
WC
Tungsten Carbide
this pitcher recorded the most wins in a single season
2H2 + O2 -> 2H2O
Molecules of water produced from 2.718 grams of oxygen gas
1.023 x 10^23 molecules of water
(2.718 grams O2)*(1 mol O2/32 grams O2)*(2 moles water/1 mol O2)*(6.022*10^23 atoms/mole)
H2SO4 + NaOH -> Na2SO4 + H2O
The above equation is unbalanced. Grams of sodium sulfate produced from 6.245 grams of sulfuric acid
H2SO4 + 2NaOH -> Na2SO4 + 2H2O
(6.245 grams H2SO4)*(1 mol H2SO4/98.079 grams H2SO4)*(1 mol Na2SO4/1 mol H2SO4)*(142 grams Na2SO4/1 mol Na2SO4)
=9.042 grams of sodium sulfate
The amount, in grams, that 1 atomic mass unit (amu) is equal to (give to 2 decimal places)
1 amu = 1.66054 × 10–24 g
the science of determining a tree's age by looking at its growth rings
dendrochronology