Copper wire is used to power appliances and other devices so it has a high capacity for transmitting electricity.…
The periodic table is composed of eighteen columns and seven horizontal rows, with two additional rows underneath. There is grand total of 112 elements in the periodic table, each of which is placed in a designated spot on the table and cannot be moved. Different areas on the table have elements that are made of different components. Elements that are in the same column are more similar than elements in the same horizontal row. Seventy five percent of the table is made up of metals, and a couple of the columns on the right of the table have gases. There are only two elements that are liquids- mercury and bromine. Column 1 contains the alkali metals, which suddenly combust when exposed to air or water. Columns 3-12 are the transition metals, which contain heavier atoms, which are more flexible in how they organize their electrons. Column 17 is made up of the more reactive gases- the halogens. The noble gases are in column 18. The electrons are the most significant part of an atom. When atoms don’t have the sufficient number of electrons they need in their outer level, they will do whatever they can to get the number they need. The number of protons an atom has is its atomic number. The atomic number plus the number of neutrons the atom has is the atom’s atomic weight.…
The objective of this experiment was to identify the unknown pure copper salt compound of #9. To do this, the mass of copper in the unknown was calculated and then divided by the mass of the whole compound to get the percent copper. The molecular weight was also calculated by dividing mass of copper compound used by moles of compound in unknown sample. The percent copper averaged out to 31.6% while the molecular weight of the sample averaged out to 201.1mw. In conclusion, the unknown compound of pure copper salt was close to Cu(C2H3O2)2 •H2O which has a percent copper of 31.8% and a molecular weight of 199.654mw.…
5. The difference in mass of isotopes of the same element is due to the different number of…
b) 1.67 x 10-2 moles x 6.02x1023 molecule x 1 atom = 1.01 x 1022 atoms of copper produced…
5) For each of the reactions list the physical evidence that a chemical change was taking place (Please refer to the order in #3)…
What happens to the mass of the copper carbonate when it is heated? Give a conclusion, which describes why the mass of copper carbonate may have changed during your experiment.…
Calculate the moles of copper, this is the mass of copper (in g) divided by the atomic mass of copper, (63.5 g/mol)…
The book COPPER SUN by Sharon M. Draper. Is an interesting story of a girl, named Amari, who lived in a nice village, with her family and friends until, she was kidnapped and sold into slavery. She has many emotions in this book. But I chose a few that I thought were the most important. Which are, frightened and happiness.…
6. Mr= the sum of the number of atoms x Ar: relative formula mass(for molecule and non-molecule substances)/relative molecular mass(only for molecular substances)…
Copper is made from a lattice of ions with free electrons. The ions…
3. Write the chemical equation(s) for each part of the following terms as it relates to this experiment.…
2. Calculate the percent abundance of each isotope by dividing its number of particles by the total number of particles and multiplying by 100. Record your…
In this lab, we changed copper into various forms using different chemicals and chemical reactions. The purpose of this lab is to demonstrate that the product of a chemical reaction depends on what is present at the time of that reaction. This lab also displays how matter cannot be created nor destroyed in a chemical reaction.…
Might not be on test. Ask teacher. Chlorine has two stable isotopes with masses of 34.97 amu and 36.97 amu. What is the relative abundance of the two isotopes? a. b. c. d. e. 50.00% 35Cl and 50.00 % 37Cl 35.45% 35Cl and 64.55 % 37Cl 64.55% 35Cl and 35.45% 37Cl 24.23% 35Cl and 75.77 % 37Cl 75.77 % 35Cl and 24.23 % 37Cl…