Periodic Table
Which atom has the largest atomic mass?
Oganesson
To change a temperature expressed in degrees celsius to a temp on the kelvin scale, what must be done to the celsius temp?
Determine whether Co2 is ionic, covalent, or both.
Covalent
How many electrons does Ca have?
2
What is a catalyst
Something that speeds up a reaction by lowering the activation energy
What is the first atom in the periodic table?
Hydrogen
Why do we use the kelvin scale in gas law problems?
So there is no negative.
Determine whether BaSO4 is ionic, covalent, or both.
Both
How many electrons does F have?
7
Which way does the stress move?
PCl5 -⇔ PCl3 + Cl2 + heat
Left
How many element groups are there?
18
The volume occupied by a sample of gas is 240.0 mL when the pressure is 1.20 atm, what volume at constant temp, will the gas occupy when the pressure is decreased to 0.860 atm?
335 ml
What is an ionic compound?
metal and non metal
What is the structural shape of HBr?
Linear
Which way does stress move?
C2H2 + H2O ⇔ CH3CHO + heat
Right
Atomic number for Beryllium?
4
The volume of a sample of gas is 25.0 mL when the temperature is 270k. If the temperature is changed to 30.0 C, what will be the new volume occupied by the gas assuming that the pressure remains constat?
28 mL
What is a covalent compound?
Nonmetal and nonmetal.
What is NH3 shape?
Trigonal pyramid.
Which reaction continues to occur after equilibrium has been reached?
Neither the forward nor the reverse reaction
Forward reaction
Both forward and reverse reaction
reverse reaction
Both
List 3 noble gases.
Helium, neon, argon, krypton, xenon, radon and oganesson
When the volume of a sample of gas is divided by the temperature of the gas, the result is 1.33 mL/K. The temperature of the gas is changed to a new value which is 411 K . What volume does the sample of gas occupy at 411 K?
546.64 mL
Is Sulfur Trioxide an element or compound?
Compound
What is the molecular structure of Propane? (C3H8)
Tetrahedral
State the direction the equilibrium will shift. Identify one other way in which the reaction could be shifted in the same direction you indicated.
2NCl3 ⇔ N2 + 3Cl2; NCl3 added
right; remove N2 or Cl2