CH 1
What are the SI units for mass, time, length, temperature, and quantity/amount?
mass: kilograms
time: seconds
length: meters
temperature: kelvin
quantity/amount: mole
What did J.J. Thompson and Rutherford contribute to discovery of atom.
Rutherford- determined nucleus is positively charged and atoms are mostly empty space
J.J. Thompson- did cathode ray experiment which showed that electrons are negatively charged
Sarin is a toxic nerve gas that has a molecular formula of C4H10PO2F. What is the molecular weight of Sarin?
140.09 g/mol
write out Fe2O3 in IUPAC and old name
iron (III) oxide, ferric oxide
electron configuration of Neon
[He]2s²2p⁶
What is the difference between accuracy and precision
Accuracy refers to how close you get to the true or accepted value. Precision refers to how close measurements are to each other
what is the name of N2O
Nitrous oxide
Molar mass of C₆H₁₂O₆
180.156 g/mol
write out sodium carbonate heptahydrate
Na2CO3 . 7H2O
electron configuration of C
[He] 2s2 2p2
how many sig figs are in each of the following
a) 00.03456 b)90000. c) 24500
d) 0.00023400 e) 6.022 x 1023
a) 4
b) 5
c) 3
d) 5
e) 4
when do you use ate v. ite (explain the diff between nitrate v. nitrite)
when do you use ic v. ous
when do you use the ide ending
ate v. ite are used in oxyanions, ate is always one more than ite. nitrate is NO3, nitrite is NO2
ic and ous are endings for acids. If the anion ends in "-ite" then the ending "-ous" is used. If the anion ends in "-ate" then the ending "-ic" used
The name of an ionic compound ends in: -ide if it contains just two elements.
how is phosphoric acid written
H3PO4
where are electrons located in an atom?
Electrons are found in shells or orbitals that surround the nucleus of an atom
How many electrons are in arsenic's outermost orbital?
5 electrons
convert 732 yards to miles
0.416 miles
True or False: All atoms of carbon are identical. Explain.
False because isotopes exist.
write the formula of lead(II) nitrate
Pb(NO3)2
Which subatomic particle(s) mainly gives element's their chemical and physical properties?
electrons
What is the electron configuration of Nb?
1s2 2s2p6 3s2p6d10 4s2p6d4 5s.
For objects near the surface of the earth, the gravitational acceleration is a constant equal to 9.8 meters per second squared. What is this expressed in miles per hour squared? Round to 2 decimal places
78919.11 mi/hr2
How many electrons, protons, and neutrons are in
3He2+
Protons: 2
electrons: 0
neutrons: 1
molecular formula of dianabol is C20H28O2
what is the molar mass?
300.4412 g/mol
What structure do ionic compounds have?
Lattice crystal structure
What is difference between intensive and extensive properties and what is an example of each?
Intensive is a mass independent property; ex: density, melting point. Extensive is a mass dependent property; ex: mass, moles, volume