Chapter 7 Definitions
A compound with this quality readily absorbs moisture, even from the atmosphere
What is hydroscopic?
Not just a cylindrical mammal, but also this certain number of atoms or molecules
What is 6.02 x 1023?
The formation reaction for Methanol is
2C + 4H2 + O2 --> 2CH4O.
If you wanted to make 100.0 moles of methanol, you would need this many moles of hydrogen and this many moles of oxygen.
What is 200.0 moles of H2 and 50.00 moles of O2?
*Extra point for team if answer is given with correct number of significant figures; 2 extra points if answer includes correct number of significant figures AND written as homonuclear diatomics.
This is the difference between a quantity's measured value and its true value
What is experimental error?
The ion for this polyatomic ion is NH4+
What is Ammonium?
This reactant will run out first, limiting the amount of product made
What is the limiting reactant?
Who is Amedeo Avogadro?
When a chemist makes methanol (using equation from previous question), she starts with 24.0 grams of carbon, 10.0 grams of hydrogen, and 40.0 grams of oxygen. In the end she makes methanol, but then realizes she has 2.0 grams of hydrogen and 8.0 grams of oxygen left over. Carbon was
What is the limiting reactant?
The Actual Yield divided by Theoretical Yield multiplied by 100% is this
Whay is the Percent Yield?
This is the formula and charge for Hydronium
What is H3O+?
The number below the chemical symbol on the Periodic Table tells you two things:
What are the mass of a single atom in amu and the number of grams you need to collect to have a mole of those atoms?
Avogadro's constant was discovered by this scientist
Who is Jean Baptiste Perrin?
A chemist is making N2F4, according to the following chemical equation:
5F2 + 2NH3 --> N2F4 + 6HF
If he adds 150 moles of F2 to an excess if NH3, he will make this many moles of N2F4
What is 129.5 grams?
This is a formula that shows the simplest ratio of elements present in a compound.
What is the empirical formula?
The _____ is as important as the chemical formula in polyatomic ions.
What is the charge?
What is Stoichiometry?
48.62 g of Mg is equivalent to this amount of moles of Mg.
A chemist wants to make Na2S according to the following chemical equation:
16Na + S8 --> 8Na2S
When she adds 15 moles of Na to 1 mole of S8, she discovers that this element is the limiting reactant.
What is sodium?
This formula shows the actual number of each element in a compound.
What is the molecular formula?
This is the formula and charge of Hydroxide.
What is OH-?
The conversion relationship you get from chemical equations are _____.
What is 1,002.95?
A chemist is running the following chemical reaction:
4FeCr2O7 + 8K2CO3 + O2 -> 2Fe2O3 + 8K2CrO4 + 8CO2
He has plenty of oxygen and K2CO3, but only 115 grams of FeCr2O7, so he can only make this amount of K2CrO4.
What is 164.0 grams?
This is an ion composed of two or more atoms that are covalently bonded to one another
What is Phosphate?