Chem 5,6,7,8,

Created by lmcarr8686 

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84 terms

the law of constant composition states

all samples of a given compound have the same proportions of their constiituent elements

what is the oxygen to hydrogen mass ratio for h2O2

16

what is the oxygen to sulfur mass ratio of sulfur dioxide

1.0

how many of each type of atoms are there in the formula NH4C2H3O2

N=1 H=7 C=2 O=2

how many oxygen atoms are in formula Al2(Co3)3

9

which among the following elements does not exist as a diatomic molecule in nature

neon

what is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms

P4O10

what is the formula mass of magnesium sulfide

56.41

which of the following has the largest formula mass

SO2

flourine is considered which of the following

molecular element

what is the name of NHO2

nitrous acid

what is the formula for an ionic compound made of barium and nitrogen

Ba3N2

what is the name of the compound whose formula is Na2O

sodium oxide

what is the formula for ionoic compound made of aluminium and oxygen

AL2O3

what is the formula for the acetates polyatomic ion

C2H3O2-

what is the name of CoS

cobalt(II) sulfide

what is the name of the ionic compound made of beryllium and chlorine

beryllium cholride

what is the name of the compound whose formula is Na2O

sodium oxide

the formula for potassium cholrate is KclO3 For madnesium chloride MgCl2 for magnesium chlorate

Mg(ClO3)2

what is the correct formula for the hypochlorite polyatomic ion

ClO-

what is the corrrect formula for potassium dichromate

K2Cr2O7

what is the name of molecular compound SF5

sulfur pentafluoride

what is the correct name of the compound whose formula is N2O4

dinitrogen tetroxide

what is the correct formula for the molecular compound heptaphosphorus octafluride

P7F8

what is the formula mass of copper(II) floride

101.55

a compound has a formula mass of 61.98 amu is comprised of atoms of sodium and oxygen in a definite ratio

sodium oxide

which of the following compounds have the smallest formula a mass

H2O

mass ratio of K to F in a compound is 2.06:1 how many grams of F are needed to react with 97.5g of K

47.3

what is the correct value for avogadros #

6.022x10 to the 23rd

which of the following statements about the mole is false

one mole of water contains 1/2 mole of oxygen atoms

how many moles of Cu are in 1.48x10 to the 25th Cu atoms

24.6

how many oles of Pb are in 4.71x10to the 21st Pb atoms

0.00782

what is the mass in grams of 5.40moles of lithium

37.5

you have 10.0g each of Na, C, Pb, Cu, Ne which contain the largest # of moles

C

how many moles of iron are contained in 1.75Kg of iron

31.3

how many moles are there in 82.5grams of iron

1.48

how many atoms are in 15.6 grams of silicon

3.34x10 to the 23rd

which of the following molecules contain 9.02x10 to the 23rd atoms

9.00 H2O

what is the mass of 1.56x10 to the 21st atoms of magnesium in grams

0.0630

in comparing 1 mole of carbon atoms to one mole of magnesium atoms, which is true

the mass of 1 mole of magnesium is gretter than the mass of 1 mole of carbon

one mole of potassium sulfate contains

4 moles of oxygen

one mole of (NH4)2 HPO4 contains howmany moles of hydrogen atoms

9

carbon dioxide contain 3.8 moles of oxygen atoms how many moles of carbon dioxide are in the sample

1.9

calculate the molar mass of ammonium carbonate

96.09g/mol

what is the mass % of hydrogen in water

11.2

how many moles of fluorine are in 3.2 moles of xenon nexafluoride

19.2

which statements about empircal formula is incorrect

an empirical formula represents a molecule

iron ore sample is found to be 35.00% Fe by mass how many grams of ore are needed to obstrain 454.0 grmas of Fe

1297

which of the followind compouns has the highest mass % of O

MnO2

an estrogen compound with the empirical formula C12,H17,O2 has amolecular mass of 386.6g/mol

2

chromium oxide compound contains 104.0 grams of chromium and 48.0 grans if ixygen the most likely empirical fomrula of this compound

Cr2O3

what is the mass of 3.09x10 to the 24th atoms of sulfur in grams

165

determine the empirical formula of a compound containing 83% potassium +17.0% oxygen

K2O

what is the molecular formula of a compound given the molar of the compound is 30.04 grams and the empirical fomrula is NH

N2H2

If 3.011x10 to the 23rd molecules have a mass of 20.04 grams what is the molar mass of this substance

40.08g/mol

if you had an aqueous mixture that contained Ag+K+and Pb+2 cations how many different solids could precipitate if a chloride colution was added

2

all of the following compounds are soluble in water except

PbCl2

what would be the formula of the precipitate that forms when Pb(NO3)2(aq) and K2SO4(aq) are mixed

PbSO4

in writing the chemical equation for a precipitation reaction what abb. of the physical state must appear with one of the products

(s)

considering the following precipitating reaction Pb(NO3)2(aq)+2KI(aq)>PbI2(s)+2KNO3(aq) which would not be spectator ions

Pb2+,I-

what type of reaction occurs when a silver nitrate solution is mixed with sodium chloride solution

precipitiation

which of the following types of compounds will not undergo a gas evolution reaction which acid is added

hydroxides

which of following statements about writing molecular complete and net ionic equations is false

all of the statements are true

which of the following statements about redox reactions is false

a reation can result in either oxidation or reduction not both

what type of reaction is the generic equation AB=+CD>AD+CB

double displacement

which statement about ozone is true

all the first three statements are true

a reaction which forms a solid product is an example of a

precipitation reaction

when wter is heated bubbles form in the water is the evidence of a chemical reaction

no boiling water is a physcial change

which of the following statements about balancing reactions is false

when coefficient are added the type of compounds is chnaged in the chemical reaction

sodium metal with water to form aqueous sodium hydroxide and hydrogen gas which equation below best descrbies for this reaction

2Na+2H2O>2NaOH(aq)+H2(g)

the compound sodium sulfate is solube in water when this compound dissolves in water which ion listed below would be present is solution

So4 to the 2____

which of the following compounds is insoluble

magnesium phosphate

what type of a reaction occurs when potassium metal reacts with florine gas

oxidation reduction

what type of reactions occurs when hydrocholoric acid solution is mixed with a sodium bicarbonate solution

gas evolution

Quiz question which of the following conatins 9.02x10 to the 23 atoms

9.00 g H2O

Quiz question vitamin C is known chemically by the name asorbic acid. Determine the empirical formula of asorbic acid if it is composed of 40.92% carbon, 4.58% hydrogen and 54.50% oxygen

C3H4O3

Quiz question what is the mass percent of carbon in oxalic acid H2C2O4

26.7

Quiz question what is the formula for ionic compound made of barium and nitrogen

Ba3N2

Quiz question what is correct name of compound whose formula is N2O4

dinitrogen tetroxide

Quiz question how many grams of calcium phosphate are theoretically produced if we start with 3.40 moles of Ca(NO3)2 and 2.40 moles of Li3PO4

351

Quiz question when the equation ___O2+____C5H12>____CO2+___H2O is balanced the coeffiecent of O2 is

8

Quiz question which of the following compounds is insoluble

magnesium phosphate

Quiz question what is the limiting reactant for the reaction below is given that you start with 10.0 grams of Al and 19.0 grams of O2

Al

Quiz question when a solution of MgCl2 and one of AgNO3 are mixed the net ionic equation is

Cl-(aq)+Ag+(aq)?AgCl(s)

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