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☆☆☆☆☆Cards in this guide (14)
What is a molecular formula
The molecular formula specifies the actual number of atoms of each element in a molecule.
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
What is the general form of a synthesis reaction
A+B ➝AB
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 happens to the anode in an electrochemical cell
it loses mass
What is the molar mass of H2CO3
62
Which of the following combustion reactions is balanced correctly
The correct answer is: C5H12 + 8O2 5CO2 + 6H2O.
What kind of reaction is 2C2H6 7O2 g 4CO2 6H2O
A combustion reaction
Which the following is a necessary product of a combustion reaction
heat
If the products of a reaction are NaCl and H2O what does the law of conservation of mass reveal about the reactants in the reaction
The reactants will have one Na, one Cl, one O, and two H atoms
In the reaction 2Li(s)+2H2O(l) ➝ 2LiOH(aq)+H2(g), which compound is in the gaseous state
H2
How is the mass of 1 mole of an element determined
It is the same as the element’s atomic mass, but in grams.
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