Part A: Identify the following parts of each chemical formula by circling the subscripts and drawing a square around the coefficients. H2 2 HCl 4 O2 CH4 3 CO3 2 NaOH
Part B: List the symbols for the atoms in each formula and give the number of each. C2H6 2MgO 4P4O10
NH3 3 Al(OH)3 2 H2O2
Part C: Balance each of the following equations following the procedure described in class. Be sure to show your work.
P + O2 → P4O10 Mg + O2 → MgO
P = P = Mg = Mg = O = O = O = O =
HgO → Hg + O2 Al2O3 → Al + O2
Hg = Hg = Al = Al = O = O = O = O =
BaCl2 + H2SO4 → BaSO4 + HCl
Ba = Ba =
Cl = Cl =
H = H =
S = S =
O = O =

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?

Movement that is like a t a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. transfers energy from one location to another a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave