Transform the following notations into proper scientific notations:
672.10 mm = _
0.00876 x 10-4 g = _
0.000749 g = _
7456 x 105 m = _
0.003452 x 10-4 mL =
0.0002189 x 104 L = _
356.92 x 10-6 m =_
230.4 x 106 cm = _
_ 1. How many grams are there in 2.50 moles of chromium?
a. 41.6 g
c. 130.0 g
b. 20.8 g
d. 60.0 g
_2. The molar mass of aluminum sulfate is _.
a. 123 g/mol
b. 214 g/mol
c. 278 g/mol
d. 342 g/mol
3. Which one of the following compounds has the lowe
1. Determine the number of representative particles in each of the following. Note: pay close
attention to significant figures and scientific notation.
a. How many nitrogen atoms are there in 0.425 mol nitrogen gas molecules (N 2)?
b. What is the total nu
Apply the unit analysis (monkey-bar) approach. Write the details on paper.
1. Convert from number of particles to moles.
a. 1.204 x 1024 He atoms
b. 3.01 x 1023 Cu atoms
c. 100 Ar atoms
d. 1 S atom
e. 6.78 x 1020 water molecules
4.92 x 1018 carbon diox
The sections of the periodic table reflect the electron configurations of the elements and the
sublevels occupied by the electrons. It is the electron configuration of the atom that determines
its chemical reactivity. An elements position in the periodic
Fireworks are always crowd favorites. Have you wondered where those
fantastic colors come from? In this lab, you will be exploring the phenomena of
colors produced by burning inorganic salts.
The normal configuration of the electrons about the atom or ion
1. Convert the following units.
a. 5.392 x 10-5 m to m (1 m = 10-6 m)
b. 7.76 x 108 mg to g (1 mg = 10-3 g)
c. 9.2 x 102ns to s (1 ns = 10-9 s)
d. 4.91 x 10-12 daL to L (1 daL = 101 L)
2. Convert the following units.
a. 4.29 x 102 cm to pm (1 cm = 10-2 m;