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94 terms

Chemistry 2nd Semester Mbroh

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Lewis Acid
can accept an electron pair
diprotic acid
acid with two ionizable protons
bronsted- lowry acid
hydrogen ion donor
pH
negative logarithm of the hydrogen ion concentration
nitrate
which polyatomic ion forms a neutral compound when combined with a group 1A monatomic ion in a 1:1 ratio?
binary compound
Sulfur hexaflouride us an example of a ?
PCL5
What is a binary molecular compound
it is a binary molecular compound
mxty. If the compound is not an acid, if it contains only 2 elements, and if m is not a metal what is true?
H3PO4, phosphoric acid
Which shows the correct formula and name?
NO and NO2
Which is a pair of substances the illistrates the law of multiple proportions?
35
How many hydrogen atoms are in 5 molecules of isoproyl alcohol, C3H7O
the number of atoms of bromine in 1 mole of Br2
Which is unequal to Avogrados number?
8.0 x 10^1 moles
How many moles of tungsten atoms are in 4.8 x 10^25 atoms of tungsten?
4.5 x 10 ^22
how many atoms are in .075 moles of titanium?
1.26 x 10^24 molecules
how many molecules are in 2.10 moles of CO2
The molar mass is 71.0 grams
What is true about the molar mass of a chlorine gas?
96 grams
What is the molar mass of (NH4)2 CO3
2.2 grams
What is the mass of silver in 3.4 grams AgNO3
160 Grams
What is the mass of oxygen in 250 grams of sulfuric acid, H2SO4
gases
The volume of one mole of a substance is 22.4 liters at STP or all?
0 degrees celcius and 101kPa
which combination of temperature and pressure correctly describes standard temperature and pressure and STP?
11.2 liters
what is the volume in liters o .500 moles od C3H6 gas at STP?
6.52 grams/liters
What is the density a STP of the gas sulfur hexaflouride SF6?
all would have the same volume
Give 1.0 moles o each of the following gases at STP, which would have the greatest volume?
Ar
If the density of a noble gas is 1.783 grams/ liters at STP, the gas is?
percent composition
To determine the formula of a new substance, one fo the first steps is to find the ?
20.5%
What is the percent composition of chromium in BaCrO4
28 grams N/80g NH4N03 X100 %
which expression represents the percent by mass of nitrogen in NH4NO3?
H20
Which of the following compounds has the highest content by weight?
C7H14 AND C10H20
Which of the following comounds have the same empirical formula?
SO3
Whats is the epirical formula of a compound that is 40% sulfur and 60% oxygen by weight?
C2H8N
What is the empirical formula of a substance the is 53.5%C, 15.5% H, AND 31.1%N by weight?
C16H2404
The ratio of carbon atoms to hydrogen atoms to oxygen atoms in a molecule of dicyclohexyl maleate is4 to 6 to 1. What is the molecular formula if its molar mass is 280 grams?
CH4N, 90 grams, C3H12N3
Which of the following sets of empirical formula, molar mass and molecular formula is correct?
1,3,1,3
What are the coefficients that will balance the skeleton equation for ALCl3+ NaOH= Al(OH)3+ NaCl ?
2,3,3,2
What are the missing coefficients for Cr +Fe(No3)2 =Fe + Cr(NO3)3 ?
1,6,2,3
What are the missing coefficients for Al2(SO4)3 + KOH=Al(OH) + K2SO4 ?
Al must be above H on the activity series
In order for the reaction 2Al+ 6HCL= 2AlCl3+ 3H2 to occur what must happen?
9/2
When the equation for the complete combustion of one mole of C3H7OH is balanced, the coefficient for oxygen is?
the reactant may be a solid metal
which is not true about double replacement reactions
2 g S+3 g O2= 2 mole SO3
Which of the following is the incorrect interpretation of the balanced equation of 2S + 3O2= 2SO3
1.67 moles
How many moles of glucose C6H12O6 can be burned biologically when 10.0 moles of oxygen is available?
2.00 grams
The equation below shows the decomposition of lead nitrate. How many grams of oxygen is produced when 11.5 grams of NO2 is formed? 2Pb(NO3)2= 2PbO + 4NO2 + O2
12.0 grams
Iron3 oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 grams of Fe raects completely with oxygen? 4Fe+ 3O2 = 2Fe2O
66 grams
When glucose is consumed it reacts with oxygen in the body to produce carbon dioxide, water and energy. How many grams of carbon dioxide would be produced if 45 grams of C6H12O6 completely reacted with oxygen?
290 grams
Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. How many grams of aluminum sulfate would be formed if 250 grams of H2SO4 completely reacted with aluminum?
10.1 grams
Mercury can be obtained by reacting mercury2 sulfide with calcium oxide. How many grams of calcium oxide would be needed to produce 36 gtrams of Hg?
1.00 moles
How many moles of H3PO4 are produced when 71 grams of P4O10 reacts completely to form H3PO4?
653 grams
How many grams of H3PO4 are produced when 10 moles of water reacts with a excess of P4H10?
10.0 liters
How many liters of hydrogen gas are needed to react with with Cs2 to produce 2.50 liters of CH4 at STP?
1 mole of water is produced for every mole of carbon dioxide produced
what is true about the reaction 2NaHCO3+ C6H8O7= 3H2O + Na3C6H5O7?
94.1 liters
glucose is a good source of food energy. when it reacts with oxygen, carbon dioxide an water are formed. How many liters of CO2 are produced when 126 grams of glucose completely react with oxygen?
O2 6.0 liters of CO2
Identify the limiting reagent and the volume of CO2 formed when 11 liters of CS2 reacts with 18 liters of O2 to produce CO2 gas and SO2 gas at STP?
6.8 grams
What is the maximum number of grams of PH3 that can be formed when 6.2 grams of phosphorus reacts with 4.0 grams f hydrogen to form PH3?
127 grams
Metallic copper is formed when aluminum reacts with copper2 sulfate. How many grams of metallic copper can be obtained when 54 grams of Al reacts with 319 grams of CuSO4?
82%
Lead nitrate can be decomposed by heating. What is the percent yield of the decomposition reaction if 9.9 grams of Pb(NO3)2 are heated to give 5.5 grams of PbO?
88.2%
In a particular reaction between copper metal and silver nitrate 12.7 grams of Cu produced 38.1 grams of Ag. What is the percent yield of silver in this reaction. Cu+ 2AgNO3= Cu(NO3)2+ 2Ag
The pressure outside the tire is lower than the pressure inside the tire
Why does air escape from a tire when the tire valve is opened?
.40 liters
A gas occupies a volume of 2.4 liters at 14.1 kPa. What volume will the gas occupy at 84.6 kPa?
36mL
A sample of gas occupies 17 mL at -112 degrees celcius. What volume does the sample occupy at 70 degrees celcius?
3000L x 289/312 x 99/45.5
If a balloon containing 3000 L of gas at 39 degrees celcius and 99kPa rises to an altitude where the pressure is 45.5 kPa and the temperature is 16 degrees celcius, the volume of the balloon under these new conditions would be calculated using what conversion ratio?
PV=nRT
How is the ideal gas law usually written?
condensed
An ideal gas cannot be ?
low temperature and high pressure
Under what conditions of temperature and pressure is the behavior of real gases most like that of ideal gases?
18.5 kPa
A breathing mixture used by deep sea divers contains helium, oxygen and carbon dioxide. What is the partial pressure of oxygen at101.4 kPa if P= 82.5 kPa and 0.4 kPa?
256 kPa
When a container is filled with 3 moles of H2, 2 moles of O2 and 1 mole of N2 the pressure of the container is 768 kPa. What is the partial pressure of O2?
Diffusion
The tendency of molecules to move toward areas of lower concentration is called?
hydrogen
Which of the following gases will effuse the most rapidly?
12M
What is the molarity of a solution containing 7 moles of solute in 569 mL of solution?
10M
What is the molarity of 200 mL of solution in which 2.0 moles of sodium bromide is dissolved?
.1 moles
What is the number of moles of solute in 250 mL of a .4 M solution?
2.2 M
What is the molarity of a solution containing 56 grams of solute in 959 mL of solution?
34.2 grams
What mass of sucrose C12H22O11 is needed to make 500 mL of a .200 M solution?
710 grams
What mass of NaSO4 is needed to make 2.5 liters of 2.0M solution?
.375
What is the mole fraction of ethanol in a solution of 3 moles of ethanol and 5 moles of water?
CH3 CH2 CH3
Which of the following is a condensed structural formula for propane?
ethyl
The name for an alkyl group that contains two carbon atoms?
gas
What is the physical state of the smallest alkanes at room temperature?
Cn H2n+2
What is the general formula for a straight chain alkane?
alkynes
The general name for a hydrocarbon with at least one triple covalent bond?
ethyne
What is the name of the smallest alkyne?
benzene
What compound is the simplest aromatic compound?
methane
What is the main hydrocarbon component of natural gas?
distillation
What is the first step in refining petroleum?
ammonia
Which of the following is not a fraction obtained from crude oil?
ester
What is the name of the functional group in the following component? O
ll
CH3--O--C--CH2--CH3
CH3 CH2 CHCH3
OH
An example of a secondary alcohol is shown by the structure?
OH
l
CH3--CH2--C--CH3
l
H
Which of the following compounds is a secondary alcohol?
ether
What type of compound is CH3--O---CH2--CH2--CH3?
ETHER
The functional group in CH3--O--CH2--CH2--CH2--CH3 is an?
C--C--C--O--C--C--C
Which carbon skeleton represents an ether?
ketone
What type of compound is O
ll
CH3--C--CH2--CH3
C--C--C--C==O
Which carbon skeleton represents an aldehyde?
odor
Esters contribute which property of fruits?