Scientific Notation
2.3x10-3
Convert 74 degrees Celcius to Fahrenheit.
165.2 degrees Fahrenheit
9/5(C+32)=F
How many grams are in 59 milligrams?
(1000mg=1g)
What is the name of the first column on the periodic table?
Alkali metals
How many significant figures are in 0.000456?
3 significant figures
Write 8.2x105 in standard form
820,000
Explain the difference between potential and kinetic energy. Can you think of some examples?
Potential energy: energy that is stored (rollercoaster, stretched-out rubber band, etc.)
Kinetic energy: energy in use/released (ball rolling down hill, riding a bike, etc.)
Convert 12 megagrams to milligrams
=1.2x1010 milligrams
The atomic number is the same as the number of ______.
protons
How many significant figures are in 78,000?
(72,000)+(48,000)=
1.2x105
Given that the mass of an object is 8.45 grams and the volume is 12 mL, calculate the density.
0.70 g/mL
d=m/v
Convert 56 m2 to ft2
=6.0x102
The mass number indicates the # of ______+_______.
protons+neutrons
Solve and answer with the correct number of significant figures.
19.807+12.6=
32.4
(3 sig figs)
Solve and answer with scientific notation
(8.2x104)(1.2x102)/(2.1x10-6)
=4.7x1012
Explain the difference between a hypothesis and theory.
A hypothesis is an explanation that has not yet been tested. Whereas a theory is an explanation/idea supported by experimental data/evidence.
If a car is traveling 56km/h, what is the speed in m/s?
=16m/s
(1000m=1km)
(1h/3600s)
What has to be present for a zero to be considered significant?
1. in-between two nonzero
2. a decimal is present