17a. 6.94g of Li
b. 26.98g of Al
c. 40.1g of Ca
d 55.85 molar mass Fe
e. 12.01g C
f. 107.9g of Ag
18a. 1 mol of Ne
b. .5oomol of Mg
c.1.57x10^23 mol Pb
2.81x10^-13mol O
19. 39.95amu
20. 10.00amu
21a. 9.03x10^23 atoms of Na
b. 4.068x10^27
c. 1.50x10^30amu Si
22a. 9.5g F
b. 6.06g Mg
c. 2.7x10^-10g Cl
d. 1.12x10^-3g br
e. 7.6x10^-21g W
f. 3.0x10^-22Au
23a. 3.008x10^23 amu B
b. 1.5x1024 amu S
c. 2.31x10^22 amu k
d. 7.872x10^19 amu Pt
e. 3.0x10^11 amu Au
24a. 80g Al
b. 29.5g Li
c. 19.3g n
d. 1590g Au
e. 410g Cu
f. 8240000000g S
g. 3.5x10^-9g Hg
25. Particle Symbol Mass # Actual Mass Relative Charge
Electron e- -
Proton p 1 1.673 x 10^-24 g +
Neutron n 1 1.675 × 10^-24 g neutral
26a. It's 1/12 of a carbon-12 atom's mass
b. Mass compared with mass of carbon-12 atom
27a. Its dense core
b. Ernest Rutherford
c. Protons and neutrons
28a. 1.0005 mol Ca
b. 0.5002 mol Na
c. 0.100017 mol Ni
d. 4.68 mol S
e. .0474 mol Fe
f. 6.95x10^-5 mol Ag
g. 37.4 mol S
h. 8x10^-23 mol Ba
29. If two or more different compounds are composed of the same two elements, then the ratios of the masses of the second element combined with the mass of the first element is always a ratio of small whole numbers.
Ex. CO and CO2
30a. 144amu
b. 6 amu
31. Negativly charged particles in an atom that ornit the nucleus
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This Site has several practice problems on it that might be quite useful for the upcoming quiz tomorrow: www.files.chem.vt.edu/.../Study_Guide-Moles_Problems.html
ReplyDeleteHere is a sight that goes into more depth about molar mass:http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson92.htm
ReplyDeleteRemember the triangle that was explained by doctor B. in our notes, or the diagram on page 84 of our chemistry book.
ReplyDeleteThis site explains conversions with moles and numbers of atoms.
ReplyDeleteNumbers 1 and 5-12 on this website are good practice problems with avogadro's number and molar mass.
ReplyDeletehttp://hamberchem11.googlepages.com/4-1WSMassAtomsMolecules.pdf
Does require .PDF viewer
Practice quiz i used to prep for the quiz
ReplyDeletehttp://www.gcsescience.com/q/qmol.html
this site had a nice molar calculator http://www.lenntech.com/calculators/molecular-weight-calculator.htm
ReplyDeletehttp://www.fordhamprep.org/gcurran/sho/sho/convert/molecalc.htm This site helps explain moles too
ReplyDeleteThis website talks about the history of the atomic mass unit and taking the isotopes into account when dealing with the atomic mass units.
ReplyDeletehttp://www.sizes.com/units/atomic_mass_unit.htm
this is a good website if you need help on moles, molar mass, and Avogadro's number
ReplyDeletehttp://www.ausetute.com.au/moledefs.html
http://www.algebralab.net/practice/practice.aspx?file=Algebra_AverageAtomicMass.xml
ReplyDeleteThis website explains the concept of and how to work out the average atomic mass.
Don't forget that Dr. B wants us to label everything in our calculations so she can read it.
This is a downloadable worksheet that can be handy as a homework guide.
ReplyDeletehttp://www.docstoc.com/docs/7680492/Worksheet-on-the-Mole
http://www.graphpad.com/quickcalcs/moleform.cfm
ReplyDeletethis is a quick calc. to help check your conversions from moles to grams and vise versa.
Here's another practice quiz on moles.
ReplyDeletehttp://chem.lapeer.org/Chem1Docs/MolQuiz.html
This website calculates molar mass by looking at the chemical composition http://www.webqc.org/mmcalc.php
ReplyDelete