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.
How do atoms show both unity and diversity
There are relatively few atoms, but they make many
molecules.
What is the voltage of a galvanic cell made with magnesium and gold
How would you make a 2 M solution of a compound
By dissolving 2.0 moles of the compound in water and then, after
complete dissolution, fill it up to a total volume 1.0 L with
water.
Which of the following best describes a galvanic cell
A battery containing a spontaneous redox reaction
What pieces of information is given in a half reaction
The number of electrons transferred in the reaction . . APEX
c;
What is the net ionic equation for the reaction 2kohaq h2so4aq 2h2ol k2so4aq
OH- 2H+ -> 2H2O(I)
ywwww
:)
Similar scientific themes are seen in what areas of science
In which step of the four stroke engine cycle does the heat from the combustion reaction cause the pistons to move
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.
In the reaction mgcl2 plus 2koh mgoh2 mgoh2 plus 2kcl if 3 moles mgcl2 are added to 4 moles koh what determined how much mgoh2 is made
What is the basic unit of chromosomes
A nucleosome is the basic unit.
In the reaction MgCl2 plus 2KOH and 65532 Mg(OH)2 plus 2KCl how many moles of KOH react with 1 mole of MgCl2
From the balanced equation it can be seen that it takes 2 moles
KOH to react with each 1 mole of MgCl2. So, the answer is 2.
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
