Chem 101 questions CHAPTERS 1-3

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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


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