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84 terms

Chem 5,6,7,8,

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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)