Gas Laws
Which gas law shows an inverse relationship?
Boyle's law
How many moles is in 150.0 g Fe2O3?
0.9393 mol Fe2O3
Balance the chemical reaction:
KO2(s) + H2O(l) → KOH(aq) + O2(g) + H2O2(aq)
2 KO2(s) + 2 H2O(l) → 2 KOH(aq) + O2(g) + H2O2(aq)
Give the formula for carbon tetrachloride
CCl4
Copper and tin mix to create this alloy.
What is bronze?
A sample of methane gas that has a volume of 3.8 L at 5 degrees C is heated to 86 degrees C at constant pressure. Calculate its new volume with correct sig figs.
4.9 L
What is the percent composition by mass of each of the following elements in formaldehyde: CH2O
39.99% C, 6.713% H, and 53.28% O
What species is the oxidizing agent?
2 AgNO3 + NO3- --> H3AsO4 + NO
AgNO3
What is the name of HI?
hydroiodic acid
On the periodic table, Francium is named for the country of France; less obviously, this metallic element gets its name from the old Latin name for what is now France.
What is gallium?
A 2.00 L sample of oxygen gas was collected over water at a total pressure of 785 torr and 25 degrees C. When the oxygen was dried (water vapor removed), the gas had a volume of 1.94 L at 25 degrees C and 785 torr. Calculate the vapor pressure of water at 25 degrees C.
For O2, n and T are constant, so P1V1 = P2V2
Ptotal = PO2 + PH2O , PH2O = 785 − 761 = 24 torr
Determine the molecular formulas to which the following formula and molar mass pertains:
SNH (188.35 g/mol)
S4N4H4
What is the net ionic equation for the reaction between silver (I) nitrate and potassium chloride?
Cl- (aq) + Ag+ (aq) --> AgCl(s)
The name of AsF3
arsenic trifluoride
This is the second most abundant element in the universe.
What is helium?
A 1.00 L gas sample at 100. degrees C and 600. torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?
PHe = χHePtotal = 0.970 × 600. torr = 582 torr; PXe = 600. − 582 = 18 torr
What mass of NH4ClO4 should be used for every kg of Al reacted?
Al(s) + NH4ClO4(s) --> Al2O3(s) + AlCl(s) + NO(g) + H2O (g)
4355 g = 4.355 kg NH4ClO4
Hydrochloric acid (75.o mL of 0.250 M) is added to 225.0 mL of 0.0550 M Ba(OH)2 solution. What is the concentration of the excess H+ or OH- left in this solution?
0.60 × 10−2 mol OH− in excess.
2.0 × 10−2 M OH−
The name of Sn(MnO4)4
tin (IV) permanganate
Portland native Linus Pauling is renowned for being one of two people (the other being Marie Curie) to win a Nobel Prize in two different fields. Pauling's first was a Nobel Prize in Chemistry for his work with chemical bonds; his second Nobel was in this field.
What is Peace?
A 2.747-g sample of manganese metal is reacted with excess HCl gas to produce 3.22 L of H2 at 373 K and 0.951 atm and a manganese chloride compound (MnClx). What is the formula of the manganese chloride compound produced in the reaction?
The formula of compound is MnCl4
Empirical formula: CHO
Molecular formula: C4H4O4
Balance the redox reaction in basic solution.
Ag(s) + CN- (aq) + O2 (g) --> Ag(Cn)2- (aq)
4Ag(s) + 8CN- (aq) + O2 (g) + 2H2O --> 4Ag(Cn)2- (aq) + 4OH- (aq)
Write the formula for iron (III) dichromate
Fe2(Cr2O7)3
A 6-letter C-word is the name of the polysaccharide substance that makes up the hard outer armor of many insects, arachnids, and crustaceans.
What is chitin?