Oxidation Number And Chemical Formula Chemistry

Oxidation Number And Chemical Formula Chemistry

In this chapter we discuss oxidation number and chemical formula.

A chemical formula includes the symbols of the elements in the compound and subscripts that indicate

Number of atoms or ions of each element that are combined in the compound


A chemical formula for a molecular compound represents the composition of

A molecule


How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF4?

4


The formula for carbon dioxide, CO2, can represent

all of the above


What is the formula for zinc fluoride?

ZnF2


What is the formula for the compound formed by calcium ions and chloride ion?

CaCl2


What is the formula for the compound formed by lead (II) ions and chromate ions?

PbCrO4


What is the formula for aluminum sulfate?

Al2(SO4)3


What is the formula for barium hydroxide?

Ba(OH)2


Name the compound Ni(ClO3)2

nickel (II) chlorate


Name the Zn3(PO4)2

zinc phosphate


Name the compound KClO3

potassium chlorate


Name the compound Fe(NO3)2

iron (II) nitrate


Name the compound Al2S3

aluminium sulfide


Name the compound CF4

carbon tetrafluoride


Name the compound SiO2

silicon dioxide


Name the compound SO3

sulfur trioxide


Name the compound N2O3

dinitrogen trioxide


What is the formula for silicon dioxide?

SiO2


What is the formula for dinitrogen trioxide?

N2O3


What is the formula for sulfur dichloride?

SCl2


What is the formula for diphosphorus pentoxide?

P2O5


what is the formula for hydrochloric acid?

HCl


the oxidation number of fluorine is

-1 in all compounds


What is the oxidation number of oxygen in most compounds

-2


what is the oxidation number of a pure element

0


In a compound, the algebraic sum of the oxidation number of all atoms equals

0


what is the oxidation number of hydrogen in compounds containing metals?

-1


in a polyatomic ion, the algebraic sum of the oxidation numbers of all atoms is equal to

the charge of the ion


what is the oxidation number of oxygen in H2O2

-1


what is the oxidation number of hydrogen in KH

-1


what is the oxidation number of hydrogen in H2O

3


what is the oxidation number in SO2

1


what is the oxidation number of sulfur in H2SO4

6


what is the oxidation number of oxygen in CO2

-2


Name the compound N2O2 using the stock system

nitrogen (II) oxide


Name the compound SO2 using the stock system

Sulfur (IV) oxide


name the compound CCl4 using the stock system

carbon (IV) chloride


name the compound H2O using the stock system

hydrogen (I) oxide


name the compound CO2 using the stock system

carbon (IV) oxide


name the compound PBr5 using the stock system

phosphorous (V) bromide


the molar mass of an element is the mass of one

mole of the element


what is the sum of the atomic masses of all the atoms in a formula for a compound

formula mass


What is the formula mass of magnesium chloride, MgCl2

95.21 amu


what is the formula mass of ethyl alcohol, C2H5OH

46.08 amu


What is the formula mass of (NH4)2SO4

132.16 amu


the molar mass of MgI2 is

the sum of the masses of 1 mol of Mg and 2 mol of I


the molar mass of NO2 is 46.01 g/mol. how many moles of NO2 are present in 114.95 g

2.498 mol


the molar mass of CCl4 is 153.81 g/ mol. how many grams of CCl4 are needed to have 5.000 mol

769.0 g


the molar mass of H2O is 18.02 g/mol. how many grams of H2O are present in 0.20 mol

3.6 g


the ,olar mass of LiF is 25.95 g/mol. how many moles of LiF are present in 10.37 g

0.3998 mol


the molar mass of CS2 is 76.15 g/mol. How many grams of CS2 are present in 10.00 mol

761.5 g


the molar mass of NH3 is 17.03 g/mol. how many moles NH3 are present in 107.1 g

6.289 mol


what is the mass of 0.240 mol glucose C6H12O6

43.2 g


how many Cl- ions are present in 2.00 mol of KCl

1.20 x 10^24


how many OH- ions are present in 3.00 mol of Ca(OH)2

3.61 x 10^24


how many oxygen atoms are there in 0.500 mol of CO2

6.02 x 10^23


how many Mg2+ ions are found in 1.00 mol of MgO

6.02 x 10^23


if 0.500 mol of Na+ combines with 0.500 mol of Cl- to form NaCl, how many formula units of NaCl are present

3.01 x 10^13


how many molecules are there in 5.0 g of methyl alcohol, CH3OH

9.4 x 10^22


what is the percentage composition of CF4

13.6% C, 86.4% F


what is the percentage composition of CO

43% C, 57% O


what is the percentage composition of CuCl2

47.27% Cu, 52.73% Cl


the percentage composition of sulfur in SO2 is about 50%. What percentage of oxygen in this compound

50%


what is the mass percentage of OH- in Ca(OH)2

45.9%


what is the mass percentage of chlorine in NaCl?

60.7%


a formula that shows the simplest whole number ration of the atoms in a compound is the

empirical formula


the empirical formula is always the accepted formula for a

ionic compound


the empirical formula for a compound shows the symbols of the elements with subscripts indicating the

smallest whole number ratio of atoms


the empirical formula may not represent the actual composition of a unit a(n)

molecular compound


what is the empirical formula for a compound that is 31.9% potassium, 28.9% chlorine, 39.2% oxygen?

KClO3


what is the empirical formula for a compound that is 23.6% phosphorus and 56.4% oxygen

P2O5


to find the molecular formula from the empirical formula one must determine the compound’s

formula mass


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