What is the ratio of the mass of an electron to the mass of a proton
100
physical - changes appearance but not the make up
chemical - changes both appearance and the make up
What is the difference between physical and chemical changes ?
100
the chemistry made up of temperature
What is thermochemistry ?
100
concentrated
What is a solution having a high amount of solute?
200
anything that has mass and takes up space
What is matter made up of ?
200
nuetron
What is subatomic particle that has a nuetral charge ?
200
a reaction that combines oxygen to form water and carbon dioxide
What is combustion ?
200
At constant temperature, the volume of a confined gas is inversely proportional to the pressure to which it is subjected.
What is boyles law?
200
dilute
What is used to undo a solution ?
300
222
What is the atomic mass of Rn ?
300
24
What is the number of electrons in CONH2 ?
300
2 or more simple compounds combine to make one complicated one
What is synthesis ?
300
The physical law that the volume of a fixed mass of gas held at a constant pressure varies directly with the absolute temperature.
What is charles law ?
300
chystallization
What is happening when crystalls form ?
400
halogens
What is the name of group 17 elements ?
400
C12
What is the present atomic weight scale is based on ?
400
sodium nitrate
What is the compound that contains both ionic and covalent bonds ?
400
15L
What is A balloon contains 4 moles of an ideal gas with a volume of 5.0 L.
If an additional 8 moles of the gas is added at constant pressure and temperature, what will be the final volume of the balloon?
400
unit of mass
What is a mole ?
500
group 3 and 4
What is the location of metalloids ?
500
6.02 X 10-23 power
What is avogadros number ?
500
H-----F
What is the bond that has the greatest ionic character ?
500
1.83 g/L
What is the density (in g/L) of a gas with a molar mass of 60 g/mol at 0.75 atm and 27 °C?