Semester 1 Exam Review Flashcards
(24 cards)
Which pair have approximately the same mass?
a proton and a neutron
Which of the following is a noble gas?
Ar
The measurement g also could be written as
8.0 kg
An aqueous solution of HF would be named
Hydroflouric Acid
Chemical Properties of Gold
Gold is an inert (nonreactive) metal.
The atom with 68 neutrons and 50 protons has a mass number of
50
A 12.7 sample of CaCO3 was treated with aqueous H2SO4, producing calcium sulfate, water and 3.65 g of CO2(g). What was the % yield of CO2?
a. 71.3 b. 5.6
c. 34.7 d. 65.3
D 65.3%
An atom with 15 protons and 16 neutrons is an atom of
P (Phosphorus)
The correct formula for ammonium sulfate is
(NH4)2SO4
How many protons are in the nucleus of a Mg atom?
12
Which of the following is the correct formula for bromic acid?
HBrO3(aq)
Which of the following involves no chemical change?
boiling water
What is the formula for potassium carbonate?
K2CO3
The correct name for FeO is
iron(II) oxide
Which of the following elements is an alkali metal?
Rb
How many moles of oxygen are required to react completely with 5.96 mol of sugar?
71.5
The correct name for an aqueous solution of HC2H3O2 is
acetic acid
A 1.07-mole sample of H2O2 weighs
36.4
A 46.2-mol sample of Co represents how many atoms?
2.78 × 1025 atoms
The substance ClO3– is best described as
a polyatomic ion
Calculate the mass, in grams, of 9.81 × 1026 formula units of sulfur dioxide.
a. none of these
1.04 × 105 g
Consider the equation: . The molar mass of B is 50.0 g/mol. Which of the following statements is true when equal masses of A and B are reacted?
If the molar mass of A is less than the molar mass of B, then B must determine how much C is produced.
Which of these is a chemical property?
Helium is very nonreactive.
Which of the following conversion factors is incorrect?
1 cm/2.54 in
