The reaction type for the following reaction:
CaCO3 --> CaO + CO2
What is decomposition?
100
The number of grams in 2.50lbs. with correct sig figs. (*Hint*) 453.6g = 1lb.
What is 1130g or 1.13x103g?
100
It states that energy cannot be created nor destroyed, but that it can only be transferred or change forms.
What is the Law of Conservation of Energy?
100
The molar mass (with units) of Pb(NO3)2.
What is 331.2g/mol?
200
The number of sig figs 700.2 has.
What is 4?
200
The oxidation number for copper in the following compound: Cu2O
What is +1?
200
The number of milliliters in 1Gigaliter.
What is 109 or 1 billion?
200
The SI unit for measuring energy.
What is a Joule?
200
The number of moles of water formed from reacting 0.45mol O2 with H2.
What is 0.90mol?
300
The number of sig figs in the number: 0.054
What is 2?
300
The oxidation number for fluorine in the compound: BaF2
What is -1?
300
The volume in Liters of 500.03g of Gold (Au) with the correct number of sig figs. (*Hint* the density of gold is 19.3g/mL)
What is 0.025908L or 2.5908x10-2L?
300
Any chemical reaction that gives off more energy than it requires to react in the first place.
What is an exothermic or exergonic reaction?
300
The number of grams of NaCl that form when you react 35.4g of sodium metal with chlorine gas.
What is 90.0g?
400
The number of sig figs the answer to this multiplication problem should be rounded to: 0.723 x 8.24 x 0.83 =
What is 2?
400
The number of electrons lost in the following oxidation half reaction: 2Cr --> 2Cr3+ + ___e-
What is 6?
400
The mass of the pit of a 1.20lb. mango in grams, given that pits of mangoes account for 25.0% of the mass of the mango. (*Hint* 1lb. = 453.6g)
What is 136g?
400
The number of calories in a food calorie (Calorie).
What is 1000?
400
The percent yield of Al2O3 when your actual yield is 1.50g and you started with 1.00g of Al and performed the following reaction:
4Al(s) + 3O2(g) --> 2Al2O3
What is 79.4%?
500
The number of sig figs in 0.00700.
What is 3?
500
The number of electrons gained in the following reduction half reaction: 2Cu2+ + ___e- --> 2Cu
What is 4?
500
The number of moles (with correct sig figs) of NaCl in 54.2L of 0.135M NaCl solution.
What is 7.32mol?
500
This is the way that heat moves.
What is from the hotter object to the colder object?
500
The limiting reactant from the following reaction for the formation of zinc oxide if 4.47mol of zinc is reacted with 3.00mol O2:
2Zn + O2 --> 2ZnO