Post 4 Chemical Composition

Monday is the test and I have been studying mostly significant digits, converting moles, and units. Don't forget the diatomics HOFBrINCl which is doubled the mass when alone. Here's a good review for converting moles.
khanacademy

Post 3 Chemical Composition

Today was the Formula of a Chloride Lab which included heating a mixture of Zinc and HCL to get a compound in which you had to determine the formula using the data found. Using the given data, my partner and I determined the formula to be ZnCl2. Here's a few websites that can help.
chemteam
tamu
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Post 2 Chemical Composition

So we are now learning about hydrate compounds and anhydrates. The nomenclature of hydrates stays relatively the same, but don't forget to name the number of water molecules (type III prefixes) before the hydrate/hydride. To calculate this number convert both the mass of the crucible and the mass of the hydrate to moles using the amount in grams divided by the total mass of the molecules/compound. You then divide the large number (moles of H20) by the smaller (moles of anhydrous salt) to get x (value of hydrate).
Here's a reminder over the nomenclature. purdue
And here's a practice of my worksheet.

Post 1 Chemical Composition

Yesterday we took the pretest which was very difficult and worries me for the future. Today we learned about converting units using mole, 6.02 × 10 ²³, and the mole road map.
Here's a website that helps explain converting grams to moles.
ChemTeam