Blog Week 20

On Monday, we went reviewed what we were talking about on Thursday. We learned that when comparing one element's mass to another, we get a ratio that is unique to those elements. We did some examples and my group got assigned question six, but we didn't finish it completely. We did an equation that is: x=mg, 0.65x=O, x+0.65x=100g and we got the answer earlier and x=60.6g. This picture below shows another example we did. The first part is each element over the whole solution. The second part we divided the top number by the bottom to get a decimal then moved the decimal place over to get a percentage. These percentages where the percentage of each element in the solution.

On Tuesday, we did a lab. We wanted to find how much and how many of each hardware tool we had. We related how much to how many, which for food is serving size, but for our experiment we called it Quinn. We also wanted to find the relative mass of each hardware, which is the mass divided by the smallest mass. The picture below shows the results from the lab. For the Quinns we did the mass of the whole jar mass minus the empty jar to get a Quinn.

On Wednesday, I was absent.
On Thursday, we learned about a mole and molar mass. A mole is a group of particles that contains Avogadro's number of particles. Another definition is that it is the measurement that relates how much to how many. The last definition we gave it was a proportion of grams to the number of particles. One mol of Hydrogen. We learned that the molar masses are compared to Hydrogen. Molar mass is the same as the relative atomic mass relative to Hydrogen. This picture to the left shows some molar masses of some substances. Atomic mass unit, a.m.v., equals one Hydrogen unit to measure atoms. Relative atomic mass and molar mass are the same number, but different units. So we did a problem, it was this: 55.845 amv x 6.02 x 10^23 = 55.845 g. You can see in this problem the numbers are the same, but the units changed.
On Friday, we had a sub, so we did a worksheet. I did numbers one through three and my group got assigned number four. I did all the questions right I checked them using the answer key on google drive. I understand how to do these problems now. I know that you must know the atomic masses of the elements to solve the problems. I tweeted you number four on Friday during class.  I did one through three in my notebook.