Is this a correct form of the density equation?
volume = density/mass
No, correct form is volume = mass/density
100
Is this a valid rearrangement of the specific heat equation?
mass= q/c(deltaT)
Yes
100
How many mL in a L?
1,000
100
What property changes between different isotopes of the same element?
Mass only
100
Rutherford in his gold foil experiment discovered...
positively charged atomic particles (Protons)
200
What is the density in g/ml of an object that weighs 420 grams and when placed in 250ml of water in a graduated cylinder, raises the meniscus to 370ml?
3.5 g/ml
200
What is the energy required to heat up a piece of metal from 60°C to 110°C if it weighs 540 grams and the specific heat capacity of the metal is 0.2 J/g*°C?
5,400 J
200
one nanometer = how many meters?
1nm = 1x10^-9m
200
Isotopes have the same number of ____ but different amounts of _____
protons, neutrons
200
if you react 24 grams of Carbon, and 30 grams of Oxygen how much Carbon Monoxide will you make?
54 grams of CO
300
What is the mass of an object with a volume of 25ml and a density of 0.05 g/ml
1.25 grams
300
What is the specific heat capacity of an object that takes 2,000J of energy to heat to 45°C and weighs 50 grams?
About 0.89 J/g*°C
300
Convert 450g/ml to kg/ml
0.45 kg/ml
300
A theoretical element has three isotopes that have a mass of 0.008g, 0.100g, and 0.543g respectively. What is the mass number of this element?
0.217
300
Thomson in his cathode ray tube experiment observed what in his experiment? What was his conclusion from this observation?
observed rays in the gas, bent toward the positively charged plate. Conclusion: the rays are negative... discovered the electron.
400
What is the density of an object in g/ml that weighs 250 centigrams and displaces 0.30 liters of water when submerged?
about 0.008 g/ml
400
What is the mass of an object with a specific heat of 0.0987 J/g*°C, that is heated from 30°C to 95°C when 2,000J of energy is applied?
about 31,174.5 grams
400
Convert the density 35 g/ml into decagrams/liters
3,500 decagrams/liters
400
An element has three isotopes, A weighs 0.05 grams, and has a 25% abundance, B weighs 0.6 grams with a 50% abundance, and C weighs 0.8 grams with a 25% abundance. What is the average atomic mass of the element?
0.5125 grams
400
How many significant figures in 0.00005678?
four significant figures
500
What is the volume of an object in liters if the density of the object is 0.01 kg/ml and the mass is 250 grams?
25 ml
500
What will the change in temperature be in Kelvin if a 35 kg piece of lead with a specific heat of 0.127 J/kg*K is treated with 500 Joules of energy?
112.49 K
500
Convert 0.024 km to nm
2.4*10^10 nm
500
Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2297%), 28.9765 amu (4.6832%) and 29.9738 amu (3.0872%).
28.0853 amu
500
What are the four postulates of John Dalton's atomic theory?
- all things are made of atoms
- chemical reactions are joining, seperating, or rearrangement of atoms
- atoms of the same element have the same mass
- atoms are indivisible