Ch 9 and 10 Chem

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What does an -ite or -ate ending in a polyatomic ion mean?
Oxygen is in the formula.
Sulfur is in the formula.
Nitrogen is in the formula.
Bromine is in the formula.

Oxygen is in the formula.

What is the formula for sulfurous acid?

H2SO3

Which of the following compounds contains the Mn3+
ion?
MnS
MnBr2
Mn2O3

Mn2O3

When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ___

ous

What is the formula for phosphoric acid?

H3PO4

Sulfur hexafluoride is an example of a
monatomic ion.
polyatomic ion.
binary compound.
polyatomic compound.

binary compound.

What is the name of H2SO3?

sulfurous acid

Which of the following compounds contains the lead(II) ion?
PbO
PbCl4
Pb2S

PbO

What is the ionic charge on the zirconium ion in the ionic compound zirconium oxide, ZrO2

4

Determine the subscript for ammonium in the chemical formula for ammonium dichromate.

2

What determines that an element is a metal?

whether it loses valence electrons

An -ate or -ite at the end of a compound name usually indicates that the compound contains

a polyatomic anion.

What is the correct name for the compound CoCl2

cobalt(II) chloride

consists of a single atom with a positive or negative charge

monatomic ion

atom or group of atoms having a negative charge

Correct Answer anion

atom or group of atoms having a positive charge

cation

tightly-bound group of atoms that behaves as a unit and carries a net charge

polyatomic ion

compound composed of two different elements

Correct Answer binary compound

produces a hydrogen ion when dissolved in water

Correct Answer acid

produces a hydroxide ion when dissolved in water

Correct Answer base

What is the correct name for Sn3(Po4)2?

tin(II) phosphate

the correct formula for sulfur hexafluoride.

SF6

How are chemical formulas of binary ionic compounds generally written?

cation on left, anion on right

What is the empirical formula of a substance that is 53.5% C, 15.5% H, and 31.1% N by weight?

C2H8N

How many hydrogen atoms are in 5 molecules of isopropyl alcohol C3H7O

35

The molar mass of a substance can be calculated from its density alone, if that substance is a(n) ____.

gas at STP

What is the number of moles in 9.63 L of H2S gas at STP?

0.430 mol

Which expression represents the percent by mass of nitrogen in NH4NO3

28 g N/80 g NH4 100%

What is the mass of silver in 3.4 g AgNO3

2.2 g

The atomic masses of any two elements contain the same number of ____.

Correct Answer atoms

Which of the following elements exists as a diatomic molecule?
neon
lithium
nitrogen
sulfur

Correct Answer nitrogen

What is the volume, in liters, of 0.500 mol of C3H8 at STP

11.2 L

What is the number of moles of beryllium atoms in 36 g of Be?

4.0 mol

Which of the following compounds has the lowest percent gold content by weight?
AuOH
Aul3

Aul3

the number of representative particles of a substance present in 1 mole of that substance

Avogadro’s number

an atom, an ion, or a molecule, depending upon the way a substance commonly exists

Correct Answer representative particle

the SI unit used to measure amount of substance

mole

0C and 1 atm

standard temperature and pressure

the percent by mass of each element in a compound

percent composition

What is the molar mass of AuCl3?

303.6 g

Butanol is composed of carbon, hydrogen, and oxygen. If 1.0 mol of butanol contains 6.0 X 10 24 atoms of hydrogen, what is the subscript for the hydrogen atom in the molecular formula for butanol?

10

What SI unit is used to measure the number of representative particles in a substance?

mole

What is the percent composition of carbon, in heptane, C7H16

84%

What is true about the molar mass of chlorine gas?

The molar mass is 71.0 g.

How many moles of silver atoms are in 1.8X10 20 of silver

3.0 x 10 ^-4

The lowest whole-number ratio of the elements in a compound is called the ____.

empirical formula

Avagrado’s number

6.02X10^24

Which of the following is the correct name for N2O5

dinitrogen pentoxide

How are bases named?

like ionic compounds

How many iron(II) ions combine with oxygen to form iron(II) oxide?

1

Which polyatomic ion forms a neutral compound when combined with a group 1A monatomic ion in a 1:1 ratio?
ammonium
carbonate
nitrate
phosphate

Correct Answer nitrate

What is the correct name for the N^3- ion

nitride ion

What type of ions have names ending in -ide?

only anions

Binary molecular compounds are made of two ____.

nonmetallic elements

In naming a binary molecular compound, the number of atoms of each element present in the molecule is indicated by ___

prefixes

What is the charge on the polyatomic nitrite and chlorite ions?

-1

When Group 2A elements form ions, they

lose two electrons.

What is the correct formula for barium chlorate?

Ba(ClO3)2

Which of the following are produced when a base is dissolved in water?

hydroxide ions

Sulfur hexafluoride is an example of a

binary compound.

the number of grams of an element that is numerically equal to the atomic mass of the element in amu

atomic mass

the mass of a mole of any element or compound

molar mass

the volume occupied by a mole of any gas at STP

molar volume

What is the percent composition of chromium in BaCrO4

20.5%

What is the percent by mass of carbon in acetone, C3H6

62.1%

What is the empirical formula of a compound that is 40% sulfur and 60% oxygen by weight?

SO3

The volume of one mole of a substance is 22.4 L at STP for all ____.

gases

What information is needed to calculate the percent composition of a compound?

the formula of the compound and the atomic mass of its elements

A 22.4-L sample of which of the following substances, at STP, would contain 6.02×10^23 representative particles
oxygen
gold
cesium iodide
sulfur

oxygen

The mass of a mole of NaCl is the

molar mass.

The molar volume of a gas at STP occupies ____.

22.4 L

For which of the following conversions does the value of the conversion factor depend upon the formula of the substance?

mass of any substance to moles

Which of the following correctly shows a prefix used in naming binary molecular compounds with its corresponding number?
deca-, 7
nona-, 9
hexa-, 8
octa-, 4

nona-, 9

When naming acids, the prefix hydro- is used when the name of the acid anion ends in ____.

-ide

What is the formula for hydrosulfuric acid?

H2S

Which element, when combined with fluorine, would most likely form an ionic compound?
lithium
carbon
phosphorus
chlorine

lithium

When the name of an anion that is part of an acid ends in -ite, the acid name includes the suffix ____.

-ous

The molar mass of a certain gas is 49 g. What is the density of the gas in g/L at STP?

2.2 g/L

The volume of one mole of a substance is 22.4 L at STP for all ____

gases

What is the number of moles in 432 g Ba(NO3)2

1.65 mol

How many moles of tungsten atoms are in 4.8X10^25 atoms of tugsten

8.0 x 10^1-

If 60.2 grams of Hg combines completely with 24.0 grams of Br to form a compound, what is the percent composition of Hg in the compound?

71.5%

What is standard air pressure

101.3 kPa

What is the density at STP of the gas sulfur hexafluoride, SF6

6.52 g/L

What is the molar mass of (NH4)2CO3

96 g

When dissolved in water, acids produce ____.

hydrogen ions

What is the correct formula for calcium dihydrogen phosphate?

Ca(H2PO4)2

Aluminum is a group 3A metal. Which ion does A1 typically form?

Al3+

What type of compound is CuSO4
monotomic ionic
polyatomic covalent
polyatomic ionic
binary molecular

Correct Answer polyatomic ionic

The ions formed by nonmetals in Groups 6A and 7A

have a numerical charge that is found by subtracting 8 from the group number.

If 20.0 grams of Ca combines completely with 16.0 grams of S to form a compound, what is the percent composition of Ca in the compound?

55.6%

How many atoms are in 0.075 mol of titanium?

4.5×10^22

How many atoms are in 3.5 moles of arsenic atoms?

2.1×10^24

Which of the following is equal to Avogadro’s number?

the number of atoms of bromine in 1 mol Br2
the number of molecules of chlorine in 0.50 mol Cl2
the number of molecules of nitrogen in 1 mol N2
the number of atoms in 1 mol CO

Correct Answer the number of molecules of nitrogen in 1 mol N2

how do you find density at stp

divide molecualr weight/ 22.4

how do you calculate percent composition

mass of element/total mass x 100

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