Miscellaneous 1
What is the formula for percent error?
(|actual -theoretical|/ theoretical) * 100
What type of reactions is represented by the following chemical equation?
C2H4 + 3 O2 --> 2H2O + 2CO2
Combustion Reaction
How many moles are in 17.0 g of C6H12O6?
0.0944 moles
how many moles of H2SO4 are in a 0.80 M solution in 0.25 L of solvent
0.20 moles H2SO4
How many grams are in 1 mole of CH4
16.05 g
What type of bond is formed between the elements K and I
Ionic
What happens to molecules as the temperature increases?
They move faster
How much heat would be required to melt 4.00 moles of naphthalene if the ΔHfus = 18.8 kJ/mol
75.2 kJ
What is the name of the following compound?
SrF2
Strontium Fluoride
What volume will 1.59 moles of O2 gas occupy at STP?
35.6 L
If a sample has a mass of 15 g and a volume of 3 mL what is its density?
5 g/mL
Which of these molecules are made up of covalent bonds?
CsCl, H2O, NH3, FeO, P8S10
H2O,NH3,P8S10
A gas inside an expandable container has a volume of 75.0 mL at 20.0oC. What volume would the gas occupy at 50.0oC?
82.7 mL
What is vapor pressure?
The pressure exhibited by a liquid's vapor in a sealed container
How many moles of carbon dioxide will be produced if 135 g of ZnO is completely reacted?
____C + ____ZnO --> ____CO2 + ____Zn
36.5 g CO2
What is the half life of Mg-28 according the this graph
21 hours
Which of these three elements belong to the same period? (order listed does not matter)
Ga, B, Al, Si, Ge, Mg
Mg, Al, Si
How many moles of CH4 are in 47.0 L of gas at 355 K and 1.50 atm? R = 0.0821 L* atm/mol*K
2.42 mol
Three solutions are sealed in a container that has a pressure of 1.3 atm. The vapor pressure of each liquid are 0.98 atm, 1.2 atm, and 1.5 atm. Which liquid is boiling?
Liquid 3 (1.5 atm)
What is the empirical formula of the molecule C8H24O4?
C2H6O1
If the electron configuration of an element is ns2np4 what group does the element belong to?
16
What is the trend for ionization energy AND what other characteristic shares this trend?
Increasing from left to right, decreasing from top to bottom
Electronegativity
What is the percent yield if you produced 5.14 g of NH3
after reacting 5.00 g of N2 in the following reaction?
____N2 + ____H2 --> ____NH3
84.5%
How many moles of O2 are in the equation when it is balanced?
C4H10 + O2 --> H2O + CO2
13
How many grams of hydrogen gas will be produced from the reaction of zinc metal with 85 grams of hydrochloric acid?
2.4 g H2