QUESTIONS AND VERIFIED
CORRECT ANSWERS
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In the ground state of an atom? - CORRECT ANSWER-all the electrons are in their lowest energy
levels.
The element strontium is most likely to form which of these ions? - CORRECT ANSWER-Sr2+.
The formula for the compound between potassium and sulfur is? - CORRECT ANSWER-K2S.
A carbon atom forms how many bonds? - CORRECT ANSWER-4.
The Lewis structure of the CO2 molecule is? - CORRECT ANSWER-:: O =C = O::
Which of these molecules has a linear shape? - CORRECT ANSWER-HCN.
The compound iron(III) sulfite has the formula? - CORRECT ANSWER-Fe2(SO3)3.
, The formula weight of Ba(NO3)2, to the nearest integer, is? - CORRECT ANSWER-261 amu.
1.80 moles of CaSO4 weighs? - CORRECT ANSWER-245 g.
How many molecules are in a cube of dry ice (CO2) that weighs 440 g? - CORRECT ANSWER-6.02
x 1023.
For the reaction
2P + 3Cl2-----> 2PCl3
if 32.5 g of Cl2 reacts completely with excess P, how many g of PCl3 will be produced? -
CORRECT ANSWER-42.0 g.
In this equation
AgNO3 (aq) + NaCl(aq) ----> AgCl (s) + NaNO3 (aq)
the spectator ions are? - CORRECT ANSWER-Na+ and NO3.
Which of these ionic compounds is soluble in water? - CORRECT ANSWER-Pb(NO3)2.
In the reaction
2Mn2+ + Br2---> 2Mn(3+) + 2Br the species that is oxidized is? - CORRECT ANSWER-Mn2+.
A gas occupies 3.0 L at 20 oC and a pressure of 500 torr. What will be the new pressure if the gas
is heated to 100 oC and its volume is decreased to 1.2 L? - CORRECT ANSWER-1.6 x 103 torr.
A gas is under 1.0 atm pressure in a balloon of 50.0 L volume at a temperature of 393 K. If the
gas is heated
to 500 K and the pressure drops to 0.75 atm, what will be the new volume of the balloon? -
CORRECT ANSWER-85 L.