If the change in enthalpy is negative, is the process exothermic or endothermic?
What is Exothermic
100
If a species loses electrons in a process, the species has become ___________ and is the __________ agent.
The species is oxidized and is the reducing agent
200
What is the charge on nitrate?
What is 1-
200
What is the unit for solution concentration using Molarity?
What is mol/L
200
Dueterium is an isotope of hydrogen with a mass of 2 amu. How many protons, neutrons, and electrons do a deuterium isotope have?
What is 1 proton, 1 neutron, 1 electron
200
What is the Law of the Conservation of Energy?
"In a closed system, energy can cannot be gained or destroyed, only transferred from one system to another"
200
If a neutral phosphorus atom undergoes a chemical process which result in it having a 3- charge, this atom has been ___________ and is the _______ agent.
This atom has been reduced and is the oxidizing agent.
300
What is the ideal gas constant (including the units)?
What is 0.0821 (L atm)/ (K mol)
300
Name all the naturally occurring DIATOMIC elements
What is H2, O2, N2, F2, Cl2, Br2, I2
300
The energy required to REMOVE and electron from a neutral atom is referred to as?
What is the 1st ionization energy
300
Zn (s) + 2HCl (aq) --> ZnCl2 (aq) + H2 (g)
What is oxidized and what is reduced? What is the spectator ion?
Zn is oxidized, H+ is reduced, Cl- is the spectator ion.
400
What is the chemical formula for Ruthenium (IV) carbonate?
What is Ru(CO3)2
400
How many mg is 0.00067 kg? Your answer must be in scientific notation.
What is 6.7 x 10^2
400
What is the Law of Conservation of Matter?
"In a closed system, the mass at the beginning and end of the process must be the same (i.e. conserved)"
400
The energy required for a mole of solid to be converted to a mole of gas is referred to as?
What is the enthalpy of sublimation
400
2H2 (g) + O2 (g) --> 2H2O (g)
What type of reaction is this? Name all that apply.
Redox reaction
Synthesis (combination) reaction
500
What is the chemical name for P3Br8
What is Triphosphorus Octabromide
500
How many moles is 0.12011 grams of carbon?
What is 1.0 x 10^-2 moles
500
Caffeine has the chemical formula C8H10N4O2. This is an example of a)molecule b)element c) compound d)ion
Both a)molecule and c)compound
500
What is the amount of energy required to heat up 5.0 g of water from 200. K to 300. K?
2.1 x 10^3 J
500
Which of the following is NOT a redox reaction?
4Al + 3O2 --> 2Al2O3
Cu + 2AgNO3 --> 2Ag + Cu(NO3)2
Na2S + 2HCl --> 2NaCl + H2S
C2H4 + 3O2 --> 2CO2 +2H2O
Na2S + 2HCl --> 2NaCl + H2S
Remember, double displacements are usually not redox reactions unless there is a subsequent decomposition to gas products.