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FORMULA Al2 (SO4 )3
Al=2 atoms
S=3 atoms
O= 12 atoms
blue beads Al= 2
yellow beads S=3
green beads O =12
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- Calculate the average density of a single Al-27 atom by assuming that it is a sphere with a radius of 0.143 nm. The masses of a proton, electron, and neutron are 1.67261024g,9.10941028g, and 1.67491024g, respectively. The volume of a sphere is 4r3/3, where r is its radius. Express the answer in grams per cubic centimeter. The density of aluminum is found experimentally to be 2.70 g/cm3. What does that suggest about the packing of aluminum atoms in the metal?2.71 Use the web to determine the amount of low-density polyethylene and high-density polyethylene produced annually in the United States. Which uses predominate in the applications of these two materials?Copper: (a) Suppose you have a cube of copper metal that is 0.236 cm on a side with a mass of 0.1206 g. If you know that each copper atom (radius = 128 pm) has a mass of 1.055 1022 g (you will learn in Chapter 2 how to find the mass of one atom), how many atoms are there in this cube? What fraction of the cube is filled with atoms? (Or conversely, how much of the lattice is empty space?) Why is there empty space in the lattice? (b) Now look at the smallest, repeating unit of the crystal lattice of copper. Knowing that an edge of this cube is 361.47 pm and the density of copper is 8.960 g/cm3, calculate the number of copper atoms in this smallest, repeating unit.
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- V Shident Portal X C Clever | Portal X C lever Portal x O Microsoft Offic x O Mail - Abdi, M X * Short Story.do x O Schoology A districtims.seattleschools.org/common-assessment-delivery/start/4683263317?action=onresume&submissionld=443627248 Chemistry A x 4 Atoms.1 Quiz 4 of 5 POSSIBLE POINTS: 3 Imagine you start with an atom that has 7 protons, 7 neutrons, and 7 electrons, If you add 1 proton and 1 electron, then the element will and the element will be The mass of the element will and the mass would be The charge of the element will KA v and the charge would be PERIODIC TABLE ELEMENTS 1-20 Не HEUUM H 4.00 ERYLLA BORON GARBON NITROGEN ORYOEN FLUORINE HEON 10 Li Be B F Ne SOOIUM 11 MAGNESUM 12 ALUMUN 13 SUCON PHOSHOR CHLORINE 17 SULFUR ARGON 14 15 16 18 Na Mg Al S CI Ar POTASSUM CALCIUM 20 K Ca 1 Next g Schoology-Googl. O SettingsA. Sentence Completion. Complete each statement with a word/ concept in the blank of the item. 1. is shorthand of expressing the types and the number of atoms present in a substance. 2. The chemical symbol of carbon is 3. There is/are nitrogen atom/s present in this chemical formula NH3. 4. O is the chemical symbol for 5. There is/are hydrogen atom/s in C6H1206.OSU MyOregonState - Overview CHEM 101 Homework 10 Chem101 Inbox (59) - ketelk@oregonsta X Week 1 Post-lab/Reading Quiz: x+ A app.101edu.co Apps M Gmail O YouTube News Question 9.a of 49 In an experiment, the reaction of 100.0 g of iodine produced 144.9 g of a compound formed from iodine and fluorine. What mass of fluorine was consumed in the reaction? 2. 3 4. 7 8. 9. +/- LAir
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