Chem Ch. 1 Flashcards
Who was the discoverer of the anti-cancer activity of Cisplatin?
Barnett Rosenberg
Define Experiment
An observation of natural phenomena carried out in a conrolled manner so that the results can be duplicated and rational conclusions made.
Define Law
A concise statement or mathematical equation about a fundamental relationship or regularity of nature.
Define hypothesis
A tentative explanation of some regularity of nature.
Define theory
A tested explanation of basic natural phenomena.
What is mass?
The quantity of matter in a material
What is the law of conservation of mass
The total mass remains constant during a chemical change (chemical reaction)
Define precision
The closeness of the set of values obtainecd from similar measurements of an identical quantity
Define accuracy
The closeness of a single measurement to its true value
What is the conversion of Celsius to Kelvin?
K = C + 273.15
Conversion formula Farenheit to Celsius
Conversion Farenheit to Celsius
The hottest place on record in North America is Death Valley in California. It reached a temperature of 134 Farenheit in 1913. What is the temperature reading in Celsius? Kelvin?
Celsius
tc = 5/9 x (tf - 32)
tc = 5/9 x (134 - 32) = 56.7 Celsius
Kelvin
Tk = (tc x 1K/1C) + 273.15 K
Tk = (56.7 C x 1K/1c) + 273.15 K = 329.9 K
SI Units – Define and Unit
- Area
- Volume
- Density
- Speed
- Acceleration
- Force
- Pressure
- Energy
SI Units
- Length squared – m2
- Length cubed – m3
- Mass per unit volume – kg/m3
- Distance traveled per unit time – m/s
- Speed changed per unit time – m/s2
- Mass times aceleration of object – kg x m/s2 (=newton, N)
- Force per unit area – kg/(m x s2) (=pascal, Pa)
- Force times distance traveled – kg x m2/s2 (= joule, J)
What is the formula to find the density of an object?
d = m / v
