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the density of pure diamond is 3.5 g/cm^3. what is the volume of diamond with a mass of .25g?
three samples of 1.12 g, 1.8 g, and 1.562 g are mixed together. the combined mass of the three samples, expressed to the correct number of sign. figures would be recorded as?
a prospector finds 39.39 g of pure gold (atomic mass 196.9665 amu). she has how many atoms?
1.204 X 10^23
a measure of the abillity of an atom in a chemical compound to attract electrons from another atom in the compound is called?
the ionization energies for removing successive elctrons from sodium are 496 kJ/mol, 4562 kJ/mol, 6912 kJ/mol, and 9544 kJ/mol. the great jump in ionzation energy after the first electron is removed indicated that?
the noble gas configuration has been reached
which is best reason that the atomic radius generally increases with atomic number in each group of elements?
the number of occupied energy levels increases
the ionization energies required to remove successive electrons from one mole of calcium atoms are 590 kJ/mol, 1145 kJ/mol, 2912 kJ/mol, and 6474 kJ/mol. the most common ion of calcium is probally?
the elctorns abailbale to be lost, gained, or shared when atoms form compounds are called?
What is the empirical formula for a compound that is 31.9% potassium, 28.9% chlorine, and 39.2% oxygen?
a compound contains 259.2 g of F and 40.8 g of C. what is the empirical formula for this compound?
A compound empirical formula is NO2. if the formula mass is 92 amu, what is the molecular formula?
The Haber process for producing ammonia commerically is rep by the equation N2(g) + 3H2(g)--> 2NH3(g). to completely covert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?
for the reaction rep by the equation 2HNO3+Mg(OH)2--> 2H2O how many grams of water are produced from 6.00 mol of hydrogen?
for the reactio rep by the equation 2HNO3+Mg(OH)2--> Mg(NO3)2+2H2O, how many grams of magnesium nitrate are produced from 8.00 mol of nitric acid, HNO3, and an excess of magnisium hydroxide?
what acid is used mainly in the maufacture of explosives, rubber, plastics, dyes, and drugs?
what is the basic assumption in the arrhenius theory?
bc acids and bases conduct electric current, they must produce ions in solution.
what is an arrhenius acid?
a chemical compound that decreases the concentration of hydroxide ions in aqueous solution
what is an arrhenius base?
a chemical compound that increases the concentration of hydroxide ions in aqueous solution
if a substance has great tendency to give up protons, its conjgate has
slight tendency to accept protons
which of the following is amphoteric? a. acid only b. base only c. acid and base d. none of the above
which of the following gases does not dissoolve in atmospheric water to produce acidic solutions?
a.NO b.NO2 c.O2 d.CO2
where in teh periodic table, are elements that form basic anhydrides located?
in the left and center
all of the following are homogenious mixtures except? a. sodium chloride b. sugar water solution c. gasoline d. salt water solution
which of the following is not a solute- solvent combination? a. gas gas combo b. gas liquid combo c. gas solid combo d. liquid solid combo
increasing the surface are between solute and solvent does what to the rate of dissolution?
if the amount of dissolved solute in a solution at a given temp is greater then the amount that can permanently remian in solution at that temp the solution is said to be
the solubility of a substance at a given temp can be expressed as
amount of solute per amoung of solvent
which of the follwing values for heat of solution at 25 degrees celcious reps the greated release of energy? a. -3.59 kJ/mol b. -.01 kJ/mol c.+1.33 kJ/mol d. + 12.40 kJ/mol
the concentration of water solution of NaCl is 2.48 m and itcontains 805 g of water. how much NaCl is in the solution?
an NaOH solution contains 1.90 mol of NaOh and its concentraton is .555 M whawt is the volume?
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