Cards in this guide (15)
Calculate the number of atoms of O contained in 16.0 pounds of O
16.0 lbs = 7,257 g of O2
Oxygen exists in the gas form as 02
7,257g O2 * 1 mol O2/ 32 g * 2 mol O / 1 mol O2 * 6.022x10^23
atoms/mol
= 2.73E26 atoms of O
How is stoichiometry used
Stoichiometry is used to find the molar ratios between the
reactants of a chemical reaction.
What information does a solubility table give
it tells which compounds will dissolve in water
What is the mass percent composition of an element in a molecule
Percentage composition= (mass of the element/mass of the
molecule)*100
The fraction of the molecule's mass that comes from the
element's mass
What kind of information does the activity series of metals give us
It compares how reactive the metals are
It predicts if one metal will replace another metal in a
compound
What is the molar mass of H2CO3
Which of the following combustion reactions is balanced correctly
The correct answer is: C5H12 + 8O2 5CO2 + 6H2O.
What is the net ionic equation for the reaction 2kohaq h2so4aq 2h2ol k2so4aq
OH- 2H+ -> 2H2O(I)
ywwww
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What would be the percent yield of the reaction be if the theoretical yield is 11.22 g but the actual yield was 8.67 g
In this case the yield is 77,27 %.
Which the following is a necessary product of a combustion reaction
Is not a concern regarding the use of corn as a biofuel
The color of corn is different than the color of gasoline or coal
APEX
In the reaction 2Li(s)+2H2O(l) ➝ 2LiOH(aq)+H2(g), which compound is in the gaseous state
How is the mass of 1 mole of an element determined
It is the same as the element’s atomic mass, but in grams.
Finish balancing the following equation:__Al(s)+3Zn(NO 3 )2(aq) ➝ Al(NO 3)3(aq)+__Zn(s) What coefficient does Al(s) have in the balanced equation
The only reactants in a reaction were Zn and HCI. What does the law of conservation of matter say about the products
The product will contain only Zn, H, and CI. -Apex
