Which nitrogen - containing compound is one cause of acid rain? - ANS-NO2
How many moles of gas would be found in a rigid 5.0L cylinder at 12.0 atm
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and 15 degrees C - ANS-2.5 mol
Which is the IUPAC name for Cu2SO3? - ANS-copper (I) sulfite
NH3, H2S, NO2, and Cl2 each has a distinct odor. If you were standing one meter away
when bottles of each of these gases were opened simultaneously, which gas would you
smell first? - ANS-NH3
Which statement best describes the change phase of a gas to a liquid? - ANS-It is
exothermic because energy is released
Which is the volume of 7.50 mol argon, Ar, at STP? - ANS-168 Liters
Which can be used to most accurately measure the volume of a liquid? - ANSgraduated cylinder
If the atmospheric pressure is 99kPa and the water vapor pressure is 3.0 kPa, then
what is the pressure of the gas collected over water? - ANS-96 kPa
Express the measurement of 3750 meters in correct scientific notation. - ANS-3.75 x 10
raised to the third (3) meters
What is produced when zinc, Zn(s), reacts with dilute sulfuric acid, H2SO4(aq) - ANSH2+ZnSO4
Which sample of gas at STP has the same number of molecules as 2.0 L neon, Ne, at
STP. - ANS-2.0 L of fluorine, F2
Lysine has a molecular formula of NH2 (CH2)4 CHNH2 COOH. What is the empirical
formula for lysine. - ANS-C6,H14,O2,N2
The melting point of gallium is 29.8 degrees C. What is the physical state of gallium at
250K? - ANS-solid
________ H3PO4+_______ Ca(OH)2 ---- Ca3(PO4)2 + ? H20. Which is the coefficient
of water, H20, in this equation when it is balanced using the whole number coefficients?
- ANS-6
A compound made of nitrogen and oxygen has a 30.4% nitrogen content by mass.
What is its empirical formula? - ANS-N2O4
What is the average atomic mass of this element with the given isotope abundance? -
ANS-42.65 u
Al2 (CO3)3 (s) +6HCl (aq) ------ 2AlCl3 (aq) + 3H20 (l) + 3CO2(g). What volume of
carbon dixode gas, CO2, would be produced at STP if 23.40 g of aluminum carbonate
reacts with excess hydrochloric acid, HCl? - ANS-6.72 L
Ten grams of a certain isotope has a half life of 12 hours. What mass of this isotope
remains after 48 hours? - ANS-0.63 g
K2CO3(s) + 2HCl (aq) ----- 2KCl (aq) + H20 (l) + CO2 (g). What mass of potassium
chloride should be theoretically produced when 41.46 g of potassium carbonate is
reacted with excess hydrochloric acid?
Compunds:
Potassium Chloride, KCl = 74.55 molar mass, g * mol -1
Potassium Carbonate, K2CO3 = 138.2 g * mol -1 - ANS-44.73 g
Which atom has the smallest radius? - ANS-P
For an atom, which set is correct? - ANS-Ca, 20 protons, 20 electrons
Which is the specific heat of lead, Pb, if the addition of 3350 J changes the temperature
of 516 g from 20.8 degrees C to 70.8 degrees C? - ANS-67.0 J * g-1 degrees C -1
Consider this reaction N2(g) + O2 (g) ------ 2NO (g) ---- delta (heat) = +180.50 kJ. What
will the enthalpy change be if 15.00 g of NO forms?
Compound: nitrogen oxide, NO = molar mass, g * mole -1 - ANS-+45.1 KJ
A crystalline solid, which is a nonconductor in its solid state, has a high melting point,
and is water soluble, is classified as? - ANS-Ionic
What is the equilibrium constant expression for this reaction? C(s)+O2(g) = 2 CO2(g) -
ANS-k (eq) = [O2]/ [CO2]2
In which set do all the elements have the same number of valance electrons? - ANSN,P, As
Which combination of elements would be expected to produce the most polar covalent
bond? - ANS-O-H
A catalyst effectively increases the rate of reaction by decreasing the ____ - ANSactivation energy
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