Test 1
How many sig figs are in 0.00009805
4
-1
What is the molar mass of Oxygen
12g
What kind of reaction type is this?
A + B = AB
Combination
What do acids and bases taste like?
Acids= sour
Bases=bitter
What is the scientific notation .00849 ?
8.49 x 10^-3
What element is a halogen in the fifth row?
Iodine
What is the mass percent of Carbon in CO2?
27%
C=12
O=16(2)=32
CO2=44
A reaction needs 2578J to be completed. Is it exothermic or endothermic?
Endothermic
What could increase the rate of a reaction?
Increase temperature
Increase concentration
Add a catalyst
What is the volume of a substance with a density of 1.28g/mL and a mass of 3.85g.
3.01 mL
What is the name for N3S2?
Trinitrogen Disulfide
What kind of shape does PH3 have?
P-5 ve
H-3 ve
PH3-8ve
What are the products of a combustion reaction?
CO2 and H2O
What is the name of this acid?
H2SO4
Sulfuric Acid
A sample of Au (Specific Heat is 0.129 𝐽/gC) absorbs 5557 J. The temperature increase from 15.1 oC to 65.0oC. Determine the mass of the sample.
∆E = SH mass ∆T
∆T= Tfinal - Tinitial=65 - 15.1=49.9oC
5557J=(0.129j/gC)(X)(49.9C)
860g=mass
Calculate the amount of energy in Joules found in a light sources which has the wavelength of 836 nanometers. Provide the correct number of sig figs.
h=6.626 x 10-34J(sec)
c=3 x 108m/sec
836m x 1 𝑚/109 𝑛𝑚 =836 x 10-9
E=hc/λ
E=(6.626 x 10-34J(sec))(3 x 108m/sec)/836 x 10-9
E=2.38 X 10-19
What is the number of grams in 8.3 mols of NH4Cl?
(8.3mols/1 NH4Cl)(53.491g/1mol)=440 g NH4Cl
Determine the milliliters of a 1.45 M TiCl4 solution are needed to make 105 mL of a 0.219 M TiCl4 solution.
MV=MV
(1.45M)(V) = (0.219M)(105mL)
V=(0.219M)(105mL)/(1.45M)
V=15.9 mL
A) On which side of a battery do these occur?
Oxidation
Electron flow
B)What kind of reaction is happening to Iron in the forward reaction?
2Fe(s) + 3Cl2(g) --> 2FeCl3(s)
A) Oxidation=the side with the anode
Electron Flow=the side with the cathode
B) 2Fe(s) + 3Cl2(g) --> 2FeCl3(s)
0 0 +3 -1
Oxidation - loss of electrons