Chemical bonds
This molecular shape has
4 electron domains
- 3 bonding pairs, 1 lone pair
Trigonal pyramidal
Percent comp of glucose
Carbon - 39.99%
Hydrogen - 6.73%
Oxygen - 53.28%
melting point of iron
1538oC
m = 0.5 mol x 18.02 g/mol
9.01 g.
combined atomic mass of 37 atoms of urainium, 48 atoms of protactinium, and 49 atoms of thorium
31266.663
what is NH4
ammonia
Molar mass of glucose
What is 180.18 grams per mol
solid to gas
sublimination
You need to prepare 250 mL of a 0.15 M sodium chloride(NaCl) solution. How many grams of NaCl must you weigh out?
M=2.19 g
AM of 16 oxygen atoms
256
what is a diatomic element
when 2 elements exist naturally as a molecule
Grams of 67 mols of glucose
What is 12,072.06 grams?
critical temp definition
temp at which a substance cannot exist in liquid form
A gas cylinder holds 5.0 L of oxygen gas (O2) at a pressure of 3.2 atm and a room temperature of 25°C. How many grams of oxygen gas are in the cylinder?
20.93 grams of oxygen
why do elecrons not fall into the nucleus
they stay in their energy levels
difference between a ionic and covalent bond
ionic- Electons being transferred
covalent-electrons being transferred
How many molecules is 67 trillion grams of glucose
2.24 x 10^35 (~224 undecillion)
definite shape and volume
solid
You react 10.0g of nitrogen gas (N2) with 3.0g of hydrogen gas (H2). How many grams of ammonia (NH3) can you theoretically produce?
12.16 grams
why do elements have masses different from atomic numbers
neutrons
what is the prefix for 9
nona
Avogadros number
what is 6.022 x 10^23
STP definition
Standard temp and pressure
You have a concentrated stock bottle of 12.0 M hydrochloric acid (HCl). You want to make 500mL of a weaker 2.0 M solution. How many milliliters of the stock bottle do you need?
You must measure out 83.33 mL of the concentrated acid and add enough water to bring the total volume up to 500mL.
What are the three main subatomic particles in an atom, and what charge does each have?
Protons → positive charge (+)
Neutrons → no charge (neutral)
Electrons → negative charge (-)