Too Hot to Handle
If the decomposition of 1.00 mole of sodium hydroxide (molar mass of 40.0g/mol) absorbs 60.0 kJ of energy, how much energy would be absorbed by the decomposition of 20.0 g of the substance?
30.0 kJ
I proved a relationship between energy and mass.
Einstein
What is the correct area of the following measurements?
.50 m X 4.25 m X 6.000 m
13m3
What is the study of the relationship between the structure and properties of matter and the use of this knowledge to produce new materials?
chemistry
What type of reaction is the following?
2NaCl → 2Na + Cl₂
decomposition
List one thing that determines temperature increase in a substance
specific heat of the substance and mass of the substance
I discovered radioactivity
Curie
2.3 km is equal to ____ m
2300 m
What is an atom that has an electrical charge is called?
ion
What is the calculated amount of product that should be produced in a chemical reaction?
theoretical yield
List one assumption(s) must be made when using a calorimeter.
no heat is gained or lost to the surroundings
the calorimeter itself does not gain or lose heat
all of the heat lost by the metal is gained by the water
I discovered the positive nucleus
Rutherford
How many oxygen atoms are in Al2(SO4)3?
12
What is the unit that is used to represent the chemical quantity of a substance as a number of particles?
mole
Which of the following chemical equations represents oxidation-reduction reactions?
1) Zn (s) + CuSO₄ (aq) → ZnSO₄ (aq) + Cu (s)
2) SrO (s) + H₂O (l) → Sr(OH)₂ (aq)
3) AgNO₃ (aq) + NaI (aq) → AgI (s) + NaNO₃(aq)
1 and 2
A 21.5g piece of iron at 100.0°C was dropped into a calorimeter with 132 g of water at 20.0°C. What is the final temperature of the system?
a. 3.2°C b. 21.4°C c. 85.4°C d. 102°C
b. 21.4°C
I found the charge on the electron.
Millikan
What is the approximate atomic mass of an isotope of lithium that has 3 electrons, 3 protons, and 5 neutrons?
8 amus
What is the ratio of actual amount of product to the amount of product in a calculated chemical reaction is called?
percent yield
Give 2 examples of units that can measure heat.
calories, kilocalories, joules NOT watts
A scoop of ice cream has an energy value of 775,000 joules. What is this value in Calories? (Note 1 cal = 4.184 J and 1000 cal = 1 Cal
a.775000 Cal b.1852294 Cal c.7750 Cal d.185 Cal
185 Cal
I discovered the proton
Thomson
Silver has an atomic mass of 107.9 amu. If 51.84% of Ag exists as Ag-107 (106.9051 amu), what is the atomic mass of the other isotope?
109ish
What is a crystalline substance that contains water molecules in a definite ratio with each formula unit?
hydrate
What is the balanced equation for the complete combustion of benzene?
2 C6H6 (l) + 15 O2 (g) → 12 CO2 (g) + 6 H2O (g)