Beware the Masses
The atomic mass of Tellurium
What is 127.60 amu?
% composition = mass of _________ / mass of __________
What is element and compound?
This number is equal to 6.022 x 1023. The common name of this number is that of a burrowing rodent.
What is Avagadro's Number?
FALSE- They have to be converted to "grams" to be useable.
"The smallest part of an element that till retains the properties of that element"
What is the atom?
What is amu?
"The SI unit for the amount of a substance"
What is a mole (a.k.a. Avagadro's Number)?
___________ is the number of conversions required to find the number of atoms in 4.15 moles of Carbon.
What is two?
TRUE or FALSE: Several different molecules can have the same empirical formula, but have a different molecular formula.
TRUE- especially with hydrocarbons
"A substance containing only one type of atom"
What is an element?
Formula Mass of Na2CO3
What is 105.988 amu?
% composition of Chlorine (to 3 significant figures) in NaCl is equal to this
What is 60.7%?
One mole of (NH4)3PO4 contains ____________ formula units.
What is 6.022 x 1023?
There CANNOT be a molecular formula for a compound containing a/an __________ bond.
What is ionic?
"The sum of the average atomic masses of all the elements present in a molecule (specifically a molecular formula)"
What is the molecular mass?
The most specific name for the following formula: C6H12O6
What is a molecular formula?
This element contains the highest number of atoms in a one mole sample.
What is none of them?
Number of grams present in 2.63 mol of H2O (rounded to 3 sig figs)
What is 47.4 g H2O?
The empirical formula for plexiglass, which contains:
- Carbon = 59.9%
- Hydrogen = 8.1%
- Oxygen = 32.0%
What is C5H8O2?
"A definite amount of a compound represented by its chemical formula"
What is a formula unit?
The molar mass of (NH4)3PO4
What is 149.0858 g/mol?
The number of grams of Silver present in a 150g sample. (% composition = 69.2%)
What is 103.8g?
The number of atoms present in 596.3g of (NH4)3PO4 (rounded to 3 sig figs)
What is 2.408 x 1024 atoms of (NH4)3PO4?
The empirical formula of a particular molecule is CH2O. What is the molecular formula of a 150.1g sample of this molecule?
What is C5H10O5?
This unit is defined as "1/12 of a Carbon atom" and is used to compare the masses of atoms.
What is the atomic mass unit?