Cards in this guide (20)
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
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 is the correct sequence of steps in the four stroke engine cycle
air and fuel intake, compression and ignition, combustion and
expansion, exhaust
How do reactants and products participate in a chemical reaction
the reactants are compounds that react to form new compounds ,
the products
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 molarity of 4 mol of NaOH dissolved in 2 L of water
What are the oxidation states of the atoms in a diatomic gas
the oxidation states are always 0 for both atoms
What is the net ionic equation for the reaction 2kohaq h2so4aq 2h2ol k2so4aq
OH- 2H+ -> 2H2O(I)
ywwww
:)
When food is exposed to air it can lose electrons. This loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food causing it to spoil. What are these reactive mo
What chemical reaction that occurs when a mixture of gasoline and air is ignited by a spark is called a
This reaction is called combustion.
What do you often notice after you balance a hydrocarbon combustion reaction equation
apex sometimes the coefficient for the oxygen molecule is not a
whole number.
How should the combustion reaction C5H8 O2 CO2 H2O be balanced
Answer this question…
C5H8 + 7O2 5CO2 + 4H2O
Hydrogen-powered cars create less pollution than gasoline-powered cars when driven. What might be a challenge to using hydrogen as a fuel
Challenges to hydrogen as fuel include no distribution network,
ie gas stations, and fear that the car co u l d explode like the
Hindenburg.
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
