Foundations in Chemistry
5.00*10^2 ppm
A solution is prepared using 0.125 g of glucose, C6H12O6, in enough water to make 250. g of total solution. The concentration of this solution, expressed in parts per million, is?
orbitals
According to the wave-mechanical model of the atom, electrons are located in?
12
Phenolphthalein is pink in an aqueous solution having a pH of?
KI
Which substance forms an unsaturated solution when 80. grams of the substance are stirred into 100. grams of H2O at 10 degrees C?
HBr
Which substance is an Arrhenius acid?
HCI
Which substance is an Arrhenius acid?
formula mass
Which term represents the sum of the atomic masses of the atoms in a molecule?
ionic and molecular
Which two terms represent major categories of compounds?
they are brittle
Which property describes nonmetals?
An atom is an invisible hard sphere.
Which statement describes the earliest model of the atom?
metallic bonds
A solid samples of copper is an excellent conductor of electric current. Which type of chemical bonds are in the sample?
metal
Based on its location cadmium is most likely a?
radioactive isotopes
Dating once-living organisms is an example of a beneficial use of?
Concentration of a solution
Parts per million is used to express the?
less than the mass of a neutron
The mass of an electron is?
96
The molecular mass of (NH4)2CO3 is?
titration
The process in which the volume of a solution of known concentration is used to determine the concentration of another solution is called?
radioactive isotopes
The use of uranium-238 to determine the age of a geological formation is a beneficial use of?
yellow
What is the color of bromcresol green indicator in a solution with a pH of 2.0?
1.5 ppm
What is the concentration of AgCI in an aqueous solution that contains 1.2* 10^3 gram of AgCI in 800 grams of the solution?
242 g/mol
What is the gram-formula mass of Fe(NO3)3?
0.25 M
What is the molarity of 2.0 liters of an aqueous solution that contains 0.50 mole of potassium iodine, KI?
88%
What is the percent composition by mass of nitrogen in the N2H4?
27%
What is the percent composition by mass of sulfurin the compound MgSO4?
KCI
Which compound has the smallest percent composition by mass of chlorine?
boron
Which element is classified as a metalloid?
copper
Which element is malleable at STP?
calcium
Which element reacts with oxygen to form ionic bonds?
BaCl2 and N2O4
Which formulas represent one ionic compound and one molecular compound?
3.0 M
Which is the concentration of an aqueous solution that contains 1.5 moles of NaCI in 500. milliliters of this solution?
CI-35 and CI37
Which notations represent atoms that have the same number of protons but a different number of neutrons?
production of wastes needing long-term storage
Which phrase describes a risk associated with producing energy in a nuclear power plant?
