Properties
list three physical properties..?
Color,density ,state of matter ,solubility,melting point.
which of the following statements concerning the atom is false..?
Protons are found in orbits about the nucleus.
how many liters of 4M solution can be made using 100 grams of lithium bromide?
3.47 L
this group of nonmetals is nonreactive...?
Noble Gases
what are two different units that volume is measured in?
cm^3 and mL
list two chemical properties..?
reactivity,combustibility ,toxicity.
what is an atom? what are atoms made of?
An Atom itself is made up of three tiny kinds of particles called subatomic particles:protons,neutrons,and electrons.
how many grams of potassium carbonate are needed to make 200mL of a 2.5M solution?
69.1 grams
what does the atomic number mean?
the number of protons in the nucleus of an atom.
The density of pure solid copper is 8.94 per milliLiter.what volume does 5 kilograms of copper occupy?
559 milliliter
list three extensive properties..?
mass,volume,and length
which combination below corresponds to a cation with a +1 charge?
11 protons and 10 electrons.
66.7mL of 18.0 molar sulfuric acid solution was dissolved in enough water to make 500mL of solution.the molarity of the diluted mixture is ..?
2.40 Molar
what is the main difference between the modern and earlier periodic table?
the Earlier periodic table orders the elements based on their atomic mass. the modern periodic table orders the elements based on the atomic number.
what are three ways to increase the volume of the ballon?
1-the number of particles increases
2-lower pressure outside balloon
3-warm the balloon
why can intensive properties be used to identify a substance.?
they do not change based on amount.
why don't electrons in the atom enter the nucleus?
most atoms do not have too many protons,so there is nothing for the electron to interact with?
How Many Liters of a 0.88 M solution can be made with 25.5 grams of lithium fluoride?
1.11 L
most of the chemical elements on the periodic table are..?
Metals
500 grams of sugar occupies a volume of 0.315 liters.what is the density of the sugar in grams per milliliter?
1.587 grams per milliliter
why cannot extensive properties be used to identify a substance..?
they do change based on amounts so it tells you almost nothing about composition without further study.
which sample would contain more atoms:12g of C, or 12g of Mg? why?
12g of C,Carbon atoms have less mass,12g of each,the smaller atom sample will contain a greater number of atoms.
what is the concentration of a solution with a volume 3.3mL that contains 12 grams of ammonium sulfite ?
31.3 M
the periodic table was first arranged by the scientist..?
mendeleev
Two liquids,A and B, have densities 0.75 grams per milliliter and 1.14 grams per milliliter ,respectively .when both liquids are poured into a container ,one liquid floats on top of the other.which liquid is on top?
Liquid A (0.75 grams per milliliter)