Chapter 16 and 11
What is 25oC in Kelvin?
25+273 = 298K
A _________ is a number placed in front of an element symbol or chemical formula in an equation and aids in balancing out a chemical equation
Coefficient
How many moles of iron in a sample that contains 7.91*10^23 atoms of iron?
1.31 mol Fe
Write down the electronic configuration of Arsenic
(Ar) 3d10 4s2 4p3
What is the name for K20?
potassium oxide
At 225.0 °C(225+273=498K) a gas has a volume of 400.0 mL. What is the volume of this gas at 127.0 °C(127+273=400K)?
Which law is used?
321.29mL
Charles Law
What type of chemical reaction is this?
2KClO3 --> 2KCl + 3O2
Decomposition reaction
Given the equation: Zn + 2HCl --> ZnCl2 + H2 If I start with 3 moles of Zn, I need this many moles of HCl to react with it.
6 moles of HCl
Molecular mass of diphosphorous trichloride
186.29 g/mol
Express this in scientific notation
0.000000559
5.59 × 10−7
Use a periodic table to complete the nuclear reaction.
23592U → 42He + ?
23592U → 42He + 23190Th
Balance this chemical equation;
Al2O3 => Al + O2
Al2O3 => Al + O2
8Fe + S8 -> 8FeS
If we have 293g Fe and 17.2 g S8, how many grams of FeS will be created?
47.1 g
Group 17 element with the highest electronegativity is
A) Fluorine
B) Bromine
C) Chlorine
D) Iodine
A) Fluorine
Complete the following problems and round to correct number of sig figs
35.45 X 6.1
216.245
= 220
A gas has a volume of 300mL at 150oC. It is heated until it's volume is 600 mL. What is the new temperature of the gas if the pressure remains constant?
V1/T1=V2/T2
300mL/423K = 600mL/T2
T2 = 846K
What type of chemical reaction is this?
H3PO4 + KOH => K3PO4 + H2O
Double displacement reaction
CH3CH2OH+3O2 -> 2CO2+3H2O
What would be the limiting reactant in the reaction if 1 mole of oxygen gas and 1 mole of ethanol (CH3CH2OH) reacted with each other?
Oxygen
the possible value of azimuthal quantum numbers for subshell 4d are ...
(Value for Ml?)
-2, -1, 0, 1, 2
Convert 108in into ft
(1 inch =1/12 foot)
9 ft
A radioactive process produced an alpha particle and an atom of 24092U. What was the parent isotope?
24494Pu → 42He + 24092U
Balance the following equation:
___CO2+___H2O ->___C6H12O6+___O2
6CO2+ 6H2O -> C6H12O6+ 6O2
Given the equation: 2KClO3 --> 2KCl + 3O2 If I start with 5 moles of KClO3, I would make this many moles of KCl.
5 moles of KCl
Draw the lewis structure in the correct VSEPR shape for: NCl3
will check answers (trigonal pyramidal)
Does protons and neutrons have same mass? If so, how much times the mass of an electron?
Yes, 1836 times