Chem 101 questions CHAPTERS 1-3
Determine the mass in grams of 3.00x10^21 atoms of arsenic. (the mass of one mole of arsenic is 74.92g)
0.373 g
How many moles are in 56.97 grams of RbF?
0.5453mol
How many molecules are in 25.8 moles of CO2?
1.55x10^25 molecules
Determine the formula weight of KBr
119.00amu
What is the mass number for an atom of xenon containing 54 protons and 76 neutrons?
130
How many grams of NaCl are in 23.4 moles of NaCl?
1370g
Determine the number of moles in 50 grams of sodium. (the mass of one mole of sodium is 22.99g)
2.17 moles
Determine the number of moles in 3.00x10^21 atoms of calcium(the mass of one mole of calcium is 40.08g)
4.98x10^-3
An atom of the isotope Cs 133 contains how many protons, neutrons and electrons?
55 protons 78 neutrons 55 electrons
Gallium has two natural isotopes: Ga 69(68.9256amu) and Ga 71(70.9247amu). What is the atomic mass of Ga?
69.72 amu
What is the correct IUPAC name for CoO?
Cobalt(II)oxide
Which of the following states of matter is pictured below?
Gas
What is an example of a chemical change involving water?
H2O (l)> H2(g) +(1/2) O2(g)
What is the correct IUPAC name for FeCl3?
Iron(III)chloride
What is the correct IUPAC name for MnF3?
Manganese (III) fluoride
What does the mass number of an atom represent?
Number of protons and neutrons
Which of the following is a chemical change? a. cooking an egg b. mixing oil and water c.tearing a piece of paper d.watching a DVD
a
What is the correct IUPAC name for AlPO4?
aluminum phosphate
What is the correct IUPAC name for AsBr3?
arsenic tribromide
Which of the following sets of elements and symbols is paired incorrectly? a.iron,Fe b.sodium,S c.tin,Sn d.potassium,K e.copper, Cu
b
Which of the following pairs represent isotopes? a.Si28 and Si28(4+) b.Si28 and Al28 c. Si28 and Si29 d.Si28 and Si28(4-)
c
What is the correct IUPAC name for CaBr2?
calcium bromide
What is the correct IUPAC name for CaCO3?
calcium carbonate
What is the correct IUPAC name for CBr4?
carbon tetrabromide
What is the correct IUPAC name for CsI?
cesium iodide
What is the correct IUPAC name for CrCl2?
chromium (II)chloride
What is the correct IUPAC name for Cr2O3?
chromium (III)oxide
What is the correct IUPAC name for Co(ClO)2?
cobalt(II)hypochlorite
What is the correct IUPAC name for CuClO3?
copper(I)chlorate
What is the correct IUPAC name for N2O4?
dinitrogen tetroxide
Which of the following atoms has the same number of neutrons as Ni59? a.Co57 b.Fe58 c.Ni58 d.Co59 e.Cu60
e
What is the correct IUPAC name for HBrO(aq)?
hypobromous acid
What is the correct IUPAC name for IF5?
iodine pentafluoride
What is the correct IUPAC name for Fe(NO2)2?
iron(II)nitrite
What is the correct IUPAC name for LiOH?
lithium hydroxide
What is the correct IUPAC name for Li3PO4?
lithium phosphate
What is the correct IUPAC name for Mg3(PO4)2?
magnesium phosphate
What is the correct IUPAC name for MgSO4 * 7H2O?
magnesium sulfate heptahydrate
What is the correct IUPAC name for HNO2(aq)?
nitrous acid
What is the correct IUPAC name for HClO4(aq)?
perchloric acid
What is the correct IUPAC name for H3PO4(aq)?
phosphoric acid
What is the correct IUPAC name for KClO3?
potassium chlorate
What's the correct IUPAC name for KF?
potassium fluoride
What is the correct IUPAC name for Rb3N?
rubidium nitride
What is the correct IUPAC name for NaHSO4?
sodium hydrogen sulfate
Which of the following states of matter is pictured below?
solid
What is the correct IUPAC name for SCl2?
sulfur dichloride
Determine the number of atoms in 10.0g of sodium. (the mass of one mole of sodium is 22.99g)
2.62x10^23 atoms
What is the correct IUPAC name for Al2S3?
aluminum sulfide
Which of the following elements would be chemically similar to calcium? a.K b.Sr c.Sc d.S e.Ga
b
Which of the following is a physical change? a. rusting of a nail b. tearing a piece of paper c. cooking an egg d.burning wood
b
Which of the following sets of elements and symbols is paired incorrectly? a.lithium, Li b.arsenic,As c.silver,Si d.gallium,Ga e.zinc,Zn
c
What is the correct IUPAC name for CuNO3?
copper(I)nitrate
Which of the following states of matter is pictured below?
liquid
What is the correct IUPAC name for MnCl3 * 4H2O?
manganese(III)chloride tetrahydrate
What is the correct IUPAC name for K2SO4?
potassium sulfate
What is the correct IUPAC name for P4S3?
tetraphosphorus trisulfide
Why is dissolving sugar in water a physical change?
the sugar changed from the solid state to the aqueous state
