what is the correct value for Avogradro's number?
One mole of Boron has a mass of _____ g
What is the mass in grams of 5.40 moles of Lithium
Calculate the molar mass of calcium nitrate
Determine the emperical formula of a compoound containing 60.3% magnesium and 39.7% oxygen
What is the mass percent of carbon in oxalic acid, H2C2O4
which ingredient is the limiting reactant if you have 5 cups of flour, 9 eggs and 3 tbs of oil? Given: 2 cups flour + 3 eggs + 1 tbs oil- 4 waffles
how many grams of water are made from the reaction of 16 grams of oxygen gas? Given: 2H2 + O2- 2H2O
How many moles of water are made from the reaction of 1.4 moles of hydrogen gas? Given: 2H2 + O2- 2H2O
What type of reaction is the generic equation A+BC- AC+B
What is the net ionic equation for the reaction of hydrochloric acid with potassium hydroxide
(H^+) +(OH-) - H2O
A sample of oxygen gas that contains Avogadro's number of atoms has a mass of?
The molecular weight of a compound X(NO3)3 is 213. the atomic weight of x is? which is
Consider the following generic chemical equation: 2A+5B-C+3D. If you react 4 units of A with 10 unites of B, which statement is true
there are equivalent amounts of A and B
What is the percent yield of CuS for the following reaction given that you start with 15.5 g of Na2S and 12.1g CuSO4? The actually amount of CuS produced was 3.05 g. Reaction Na2S+CuSO4- Na2So4+CuS
What is the limiting reactant for the following reaction given we have 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2+2Li3PO4- 6LiNO3+ Ca3(PO4)2
The reaction HNO3(aq) + KOH(aq)- KNO3(aq)+ H2O is best classified as
The reaction Pb(NO3)2(aq)+K2SO4(aq)- PbSO4(s)+2KNO3(aq) is best classified as
The reaction Cu(s)+2AgNO3(aq)-Cu(NO3)2(aq)+ 2Ag(s)
Write a balanced net ionic equation for the reaction of Pb(NO3)2(aq) with NaI(aq)
Which one the following compounds is soluble in water
All of the following compounds are soluble in water EXCEPT
Name the aromatic compound
Name the following compound CH3-CH2-CH2-CH--(double bond) CH2
What is the main product when 232/90Th undergoes beta decay
Which of the following statements about carbon is FALSE
none of the above;
What molarity should the stock solution be if you want to dilute 250 ML to 2L and have the final concentration be .103 M?
The functional groups in the molecule below are H2NCH2CO2H
alkane, amine and carboxylic acid
A compound named +propanal" would be classified as an
Tritium (3/1 H) is an isotope of hydrogen that is sometimes used to make the hands of watches glow in the dark. The half-life of tritium is 12.3 years. After 49 years, approximately how much of the original tritium remains?
What is the missing particle? 231/90 Th=_+231/89 Ac
Given that you wished to use exactly .325 mole of NaCl to prepare a 2.5 M NaCl solution, how many milliliters of solution must you prepare?
Suppose a Vodka martini contains 30% alcohol with the remaining portion of the drink composed of water. what is the solute in this type of martini?
What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 grams of solid into 39.5 grams of water?
What is the main product when 235/92 U undergoes alpha decay
all of the above
the self-amplifying reaction in which neutrons produced by the fission of one nucleus would induce fission in other nuclei is called
which of the following is the formula for heptane
which type of hydrocarbon is classified as being saturated
what volume of 12 M HCl is required to make 75 mL of 3.5 M HCl?
A Geiger-Muller counter detects radioactivitiy by:
ionization of argon gas in a chamber which produces an electrical signal
Which of the following functional groups represents an alcohol?
Which of these compounds would you expect to be least soluble in water
what is the molarity of a solution prepared by dissolving 54.3 g of Ca(NO3)2 into 355 mL of water?
A .15 M solution of BaCl2 contains:
.15M (Ba^2+) ions and .30 M (Cl-) ions
Which of the following functional represents a ketone?
R- C - R
What is the missing particle? 231/90 Th- _+231/91 Pa
A consistent framework for organizing scientific knowledge is a
which of the following is a heterogeneous mixture
root beer float
which of the following is a homogeneous mixture
which of the following processes does not represent a chemical change
dissolving sugar in water
which of the following processes does not represent a physical change
fermenting grape juice
which of the following does not represent a physical property
one mole of potassium sulfate contains:
4 moles of oxygen
how many atoms are in 15.6 grams of silicon
how many moles of bromine gas are in 37.7 grams
which of the following is not an example of matter
which of the following is a compound
which state of matter has atomic spacing that is close together and indefinite shape
which state of matter has indefinite shape and is compressible
which state of matter has atomic spacing that is close together and definite shape
a pure substance is
composed of only one type of atom or molecule
.00504 in scientific notation
which of the following is the smallest distance
for the following measured numbers the significant figures is indicated in parenthesis. which is correct
the number of significant figures in 2.08E-4 cm is
An experiment calls for 22.6 g of bromine. (d=3.12 g/mL). what volume, in mL, should be used?
Express the following result to the proper number of significant figures. 45.36M/3.2S
Perform the indicated operations and give the answer in cm with the proper number of significant figures, 12.64 cm -48 mm +.246 m=
which of the following is a part of Dalton's atomic theory
atoms are rearranged but not changed during a chemical reaction
which of the following is not explained by Dalton's atomic theory
the existence of more than one isotope of an element
the existence of electrons in atoms of all elements was demonstrated by
thomson's cathode ray tube experiment
which subatomic particle has the smallest mass
which of the following two atoms are isotopes
12/6 C and 13/6 C
how many protons and neutrons are in an atom of 90/38 Sr
38 p. 52 n
the horizontal rows of the periodic table are called
the vertical columns of the periodic table are called
Lithium belongs to the ____ group of the periodic table
Bromine belongs to the ____ group of the periodic table
Argon belongs to the ____ group of the periodic table
what is the charge on the Cr in the ionic compound Cr2O3
Which of the species below has 28 protons and 26 electrons
the chemical formula for the sulfite ion is
the chemical formula for sulfurous acid is
what is the formula for an ionic compound made of magnesium and sulfur
what is the name of CoS
Cobalt (2) sulfide
What is the name of the compound made from lithium and oxygen
what is the formula for an ionic compound of aluminum and oxygen
what is a chemical reaction
when one or more new compounds are formed by rearranging atoms
given the following generic chemical reaction, which is the product
Y is the product
What are the coefficients for the following reaction when it is properly balanced?
_ potassium iodide + __ lead (2) acetate- __ lead (2) iodide + __ potassium acetate
which of the following represents wavelength
upside down y
which of the following represents frequency
the distance between adjacent wave crests is called
what happens to an atom when it absorbs energy
the atom re-emits the energy as light
which of the following elements has the highest ionization energy
which of the following atoms is the largest
the elements with the highest electronegativity values tend to be found in the
upper right-side of the periodic table
which molecule listed below has a nonpolar covalent bond
what is the molecular geometry of (NH4)+
the electron geometry and the molecular geometry of water are respectively
which term matches the definition: A separation of charge within a bond
which molecule listed below has a polar covalent bond
all of the following statements are consistent with the kinetic molecular theory of gases EXCEPT
strong attractive forces hold the gas molecules together
what is the equivalent pressure of .905 atm in units of mm Hg
To solve problems using Boyle's Law, which mathematical equation should be used?
A balloon filled with .5 L of air at sea level is submerged in the water to a depth that produces a pressure of 3.25 atm. What is the volume of the balloon at this depth?
To solve problems using Charle's Law, which mathematical equation should be used
a 325 mL sample of gas is initially at a pressure of 721 torr and a temperature of 32C. If this gas is compressed to a volume of 286 mL and the pressure increases to 901 torr, what will be the new temperature of the gas?
what is the initial temperature of a gas if the volume changed from 1 L to 1.1 L and the final temperature was determined to be 255C
the amount of heat required to melt one mole of a solid is called
heat of fusion
which intermolecular forces are found in CO2
How many joules of heat are needed to completely vaporize 24.4 grams of water at its boiling point?
which compound in liquid form will have the highest vapor pressure
copper is what type of solid
metallic atomic solid
NaCl is which type of solid
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