Quiz 1 (ch.1 and ch.2)
perchloric acid
HClO4
hydrogen iodide
HI
nitrous acid
HNO2
water on bottom and hexane on top
Hexane is an organic solvent that is very sparingly soluble in water and has a density of 0.655 g/ml. A beaker containing hexane and water is sitting in a laboratory. In the beaker, where will the water be and where will the hexane be?
8.85 x 10^22
How many atoms of oxygen are present in 6.00 grams of KClO3?
naming ionic compounds
The name of the metal comes first, followed by the name of the nonmetal, changing the nonmetal's ending to "ide".
CaHPO4; calcium hydrogen phosphide (should be calcium hydrogen phosphate)
Which of the following is not named correctly? What is the correct name?
A (lead(I) sulfate), C (nitrogen oxide), and F (aluminum bromide) only
Which of the following name and formula pairs are not correct?
scientific notation form negative exponent
move decimal to left
scientific notation form positive exponent
move decimal to right
moles to atoms
multiply by Avogadro's number
moles to mass
multiply by molar mass
move decimal to right to convert to scientific notation
negative (subtract)
NO
nitrogen monoxide
density of water
1 g/cm3
deci (d)
10^-1
pico (p)
10^-12
femto (f)
10^-15
centi (c)
10^-2
milli (m)
10^-3
micro (µ)
10^-6
nano (n)
10^-9
deka (da)
10^1
tera (T)
10^12
hecto (h)
10^2
kilo (k)
10^3
mega (M)
10^6
giga (g)
10^9
9.83 x 10^-4
An unknown substance has a density of 0.983 g/cm^3. What is this density in ng/µm^3?
percent abundance equation
Average Mass (mass number) = (%)•(Mass of Isotope A) + (%)•(Mass of Isotope B) +...
11%
Elemental magnesium consists of three isotopes: 24Mg with an accurate mass of 23.99 amu, 25Mg with an accurate mass of 24.99 amu, and 26Mg with an accurate mass of 25.99 amu. If 24Mg is 79% of naturally occurring magnesium, what is the percent abundance of 26Mg?
Scientific Notation Rules
If the number is positive the decimal moves to the RIGHT. If the number is negative the decimal moves to the LEFT
PbSO4
Lead (II) Sulfate
2.09 x 10^1
What is the answer to the following calculation in scientific notation: 2.58 + 4.54 + 5.2 +8.267?
3.1
What is the answer to the following calculation? 71.262 + 4.5 - 6x10^1 / 5.24
number of neutrons in 56Cr
Which one of the following has the largest numerical value?
HC2H3O2
acetic acid
naming covalent compounds
add prefixes to elements and add -ide to the end of the anion
AlBr3
aluminum bromide
Al2(SO3)3
aluminum sulfite
NH4ClO4
ammonium perchlorate
higher density
bottom layer (sinks)
CaF2
calcium fluoride
CaHPO4
calcium hydrogen phosphate
CaSO3
calcium sulfite
H2CO3
carbonic acid
Cr2S3
chromium (III) sulfide
atoms to moles
divide by Avogadro's number
mass to moles
divide by molar mass
HCl
hydrochloric acid
HF
hydrofluoric acid
HClO
hypochlorous acid
Naming Acids
ide- hydro_______ ic ate - ate ite- ous
15.0 grams
if you wish to obtain 10.0 g of copper metal from copper (II) sulfide, what mass of copper(II) sulfide (in grams) must you use?
Fe(OH)3
iron (III) hydroxide
LiClO4
lithium perchlorate
Mg(OH)2
magnesium hydroxide
mass percent formula
mass of solute/mass of solution x 100
Hg2(HCO3)2
mercury (i) hydrogen carbonate
H3PO3
phosphorous acid
move decimal to the left to convert to scientific notation
positive (add)
NaCN
sodium cyanide
Na3PO4
sodium phosphate
SO2
sulfur dioxide
H2SO4
sulfuric acid
lower density
top layer (floats)
90Sr^2+
what is the symbol for a species composed of 38 protons, 52 neutrons, and 36 electrons?