Unit Conversion
What's the prefix for 10-3?
milli (m)
how many protons are in a neutral atom of lead?
82
What's the chemical formula for mercury and it's physical state?
Hg(l)
What's the empirical formula for magnesium fluoride?
MgF2
Ru-96: 95.9 amu 51%
98.35 amu
atomic # = 37
An arctic ecologist measures thick ice. The thickness is 0.082 m. What is it in cm?
8.2 cm
what's negatively charged?
an electron
What's the name and ionic charge for Ag?
given Fe3+ and NO2-, what's the empirical formula?
Fe(NO2)3
calculate the mass of nitrogen in a 100g sample of dinitrogen tetroxide (N2O4)
30.456g N
Convert the following:
5.74 x 104 kg/m3 = ? g/cm3
57.4 g/cm3
how many protons and neutrons are in an atom of Kr-84?
protons = 36
neutrons = 48
What's the ionic compound for Na+ and ClO4-? What's its name?
NaClO4 sodium perchlorate
What's the empirical formula and name for Pb2+ PO43+?
Pb3(PO43-); lead phosphate
in a 5.85g sample of lithium hydride (LiH), how many moles of lithium is produced?
0.702 moles Li
Calculate the mass of CaWO4 that contains a trillion (1.00 x 1012) oxygen atoms.
1.98 x 10-34
Where is the proton, neutron and electron located?
proton/neutron = nucleus
electron = outside nucleus
What's the ONLY positively charged polyatomic ion?
ammonium
What's the name for CuS?
copper(II) sulfide
Compound X has a molar mass of 86.08 g/mol and a following composition of:
Carbon: 55.80%
Hydrogen: 7.02%
Oxygen: 37.17%
What's the molecular formula of X?
C4H6O2