Alphabet Soup
What is the name of NH3?
Ammonia
What did Millikan's Oil Drop experiment determine?
the charge of an electron
What is 77.36K in degrees Celsius?
-195.79 degrees Celsius
round 0.0003554 to 2 sig figs
0.00036
How many grams of Carbon are in Carbon Dioxode when the mass fraction is 62.5%?
27.5 g C/mol of CO2
What is the name of CBr4?
Carbon tetrabromide
What did JJ Thomson's experiment conclude?
Found mass of electron, proving the raisin in a plum pudding theory
An empty glass beaker weighs 55.32g. If the mass of the beaker is 185.56g when filled with liquid mercury, what is the mass of the mercury in the beaker?
130.24 g
1.110cm + 17.3cm + 108.2cm + 316cm
443cm
During excessive physical activity, lactic acid (M=90.08 g/mol) forms in muslce tissue and is responsible for muscle soreness. Elemental analysis shows that this compound has 40.0 mass % C, 6.71 mass % H and 53.3 mass % O. Determine the emperical formula of lactic acid.
CH2O
What is the formula for Iron (III) oxide?
Fe2O3
What was the findings of Rutherford's experiment?
explained charged nature of matter, found the nucleus, named protons
The volume of 130.24g of liquid mercury?
density of liquid mercury= 13.53g/mL
9.626 mL
Convert 0.077*10^-9 to correct scientific notation
7.7*10^-11
Lithium forms compounds which are used in dry cells and storage batteries and in high-temperature lubricants. It has two naturally occurring isotopes, 6Li (isotopic mass =6.015121 amu) and 7Li (isotopic mass = 7.016003 amu). Lithium has an atomic mass of 6.9409 amu. What is the percent abundance of lithium-6?
7.503%
What is the formula for calcium chlorate?
Ca(ClO3)2
Who founded the neutron?
James Chadwick
An empty beaker weighs 55.32g. If it were to be filled with 9.626 mL of water, what would the new total mass of the beaker be?
density of water= 0.997 g/mL
64.92g
(2.795 m * 3.10 m)/6.48 m
1.34m
Silicon has three isotopes found in nature: Si - 28 (27.997 amu), Si - 29 (28.977 amu), and Si - 30 (29.974 amu). Their percentage abundances are 92.230%, 4.680%, and 3.090% respectively. What is the atomic mass of Silicon?
28.085 amu
What is the name of C3O2?
Tricarbon dioxide
What are the four parts of Dalton's Atomic Theory?
1) All matter consists of atoms
2)Atoms of one element can not be made into the atoms of another element
3)Atoms of an element are identical to each other and different from other element's atoms
4) Compounds result from a chemical combination of a specific ratio
A jogger is running at an average speed of 5.9 mi/hr. If they start running at 11:15AM, what time is it after they cover a distance of 4.75*10^4 ft?
approximately 12:45PM
What is (13.602*1.90*3.06)/(4.2*1.4097) to the correct number of significant figures?
13
Selenium, an element used in the manufacture of solar energy devices, forms an oxide that contains only one atom of selenium (per formula unit) and is 37.8% oxygen by mass. What is the molecular formula of the oxide?
SeO3