Calculations
Convert 10lb into kg
4.5 kg
Name the properties of metals and nonmetals:
-metals: shiny, malleable, ductile, good conductors, high melting and boiling points, solid at room temperature except for mercury
-nonmetals: bad conductors, dull, non-malleable, not ductile, most have a low melting and boiling point, most are gases at room temperature
How many valence electrons are in CO2?
16
Write the formula for lead (IV) oxide
PbO2
Name this compound: P2S3
biphosphorus trisulfide
Calculate the density of an object weighing 6lbs and a volume of 20mL
136g/mL
Name an alkaline earth metal in period 5
Strontium
Draw the electron dot structure for Antimony
(draw answer on board)
Name this compound: K3N
potassium nitride
Write the formula for tetraselenium pentachloride
Se4Cl5
There are 49 students in your chemistry class. How many fingers are in your class?
490 fingers
Place As, K, Cl, B, and Rb in order from least to greatest metallic character
Cl<As<B<K<Rn
Write the electron configuration for potassium
1s22s22p63s23p64s1
Write the formula for magnesium cyanide
Mg(CN)2
Name this compound: N7Cl4
heptanitrogen tetrachloride
11 male stuents
Calculate the amount of neutrons in an element with 33 protons and weighs 77g
44 neutrons
Draw the orbital diagram for potassium
draw answer on the board
Name this compound: BaSO4
Barium sulfate
Write the formula for selenium pentabromide
SeBr5
A doctor prescribes 0.1g of doxycycline. The pharmacist has 170mg/mL solution. How many mL are needed?
4 mL
Calculate the atomic mass of the following isotopes
-Cl-35, 34.969 amu, 75.77% abundance
-Cl-37, 36.966 amu, 24.23% abundance
35.46 amu
Draw the Lewis structure for NH4
draw answer on the board
Name this compound: Fe3(PO4)2
iron (II) phosphate
Name this compound: C9O6
nonacarbon hexoxide