Chemistry 200 Exam 1 Review Problems 1. Calculate the number of atoms in 10.0 grams of Fe. 2. Give the mass number‚ #protons‚ #neutrons and #electrons for the isotope strontium-88. 3. Calculate the number of moles of carbon in 50.0 g of benzene C6H6 4. A substance is found to be 38.7 % C‚ 9.7 % H and 51.6 % O by mass. Its molar mass is 62.1 g/mole. What is its molecular formula? 5. Name the following: a) Ca(OH)2 b) KCN c) HClO4(aq) d) FeSO4 e) Na2O f) SF6 g)
Premium Oxygen Sodium hydroxide Mass
to commit this offense‚ especially if working on a paper at last minute trying to make a deadline. There’s no excuse for anyone to do be dishonest and used someone else hard work. I wrote my most resent essay for my Hazardous Material class here in AMU. I was given several questions and I had to research and answer them in an essay format. The guidelines that I found easier to follow was critical thinking and critical reading. I found them straightforward because throughout the course of researching
Premium Writing Essay Paper
My Element: Gold Origin of name: From the Old English word geolo (yellow) Symbol: Au Atomic Number: 79 Atomic Mass: 196.96655 amu Group/section: Gold is element number 79 found in group 11 period 6 Electron configuration: [Xe] 4f14 5d10 6s1 Valence electrons: 1 Physical or chemical properties: Color: gold Crystal Structure: Cubic Density at 293 K: 19.32 g/cm3 Melting Point: 1064.43 °C (1337.5801 K‚ 1947.9741 °F) Boiling Point: 2807.0 °C (3080.15 K‚ 5084.6 °F) Number of Neutrons: 118
Premium Periodic table Atomic number Electron configuration
Copper is involved in the formation of red blood cells. These enzymes in turn produce cellular energy and regulate nerve transmission‚ blood clotting‚ and oxygen transport. Name: Copper Symbol: Cu Atomic Number: 29 Atomic Mass: 63.546 amu Melting Point: 1083.0 °C (1356.15 K‚ 1981.4 °F) Boiling Point: 2567.0 °C (2840.15 K‚ 4652.6 °F) Number of Protons/Electrons: 29 Number of Neutrons: 35 Classification: Transition Metal Crystal Structure: Cubic Density @ 293 K: 8.96 g/cm3
Premium Blood Atomic number Human body
Even though the irrigation of the desert did wonders to the farming industry‚ it has left the Aral Sea a complete disaster. The Aral Sea is located in the northern part of Uzbekistan and the southern part of Kazakhstan‚ and primarily fed by the Amu-Darya River from the South and the Syr-Darya River from the North. Uzbekistan and Kazakhstan were part of the former Soviet Union during the 1960s‚ the time when they began to divert the rivers flow of water. This caused the surface level of the lake
Premium
MOLE UNIT REVIEW WORKSHEET 1. Convert 500.0 g NaCl to formula units. 5.15 x 1024 f.u. Convert 9.8 x 1024 molecules of C2H6 to grams. 4.9 x 102 g The mass of an unknown gas is 11.59 g. The mass of an equal volume of He is 1.45 g. Calculate the molar mass of the unknown gas. 32.0 g/mol Calculate the percentage composition of sulphur in Al2(SO4)3. 28.11% Calculate the molar mass of Co2(SO4)3•6H2O 514.16 g/mol The empirical formula for a compound is C2H5O and its molecular mass
Premium Oxygen Molecule Mole
PASASALAMAT: ate kaye First of all‚ I would like to thank God for this memorable occasion . thank you for the chance to have this party. For the sponsors of this occasion. THANK YOU. For my ninangs‚ ninongs. Antes and uncles. Thankyou sa Financial support. For this without you. This party could not be great.. Lola mameng. Lola moning. THANYOU! For the financial support and most of all thank you for the encouragement and moral support that you’ve showed to me. For my 18 candles and my 18 roses
Premium Trigraph ILOVEYOU Karnataka
The Aral Sea Disaster Abstract The Aral Sea and the entire Aral Sea basin area have achieved worldwide notoriety due to the environmental disaster. The example of the Aral Sea disaster has sent a signal to the entire international community demonstrating how fast and irrevocable the environmental system can be ruined if there is no long-term thinking and planning in place. This paper gives a broad overview of the policies that have resulted in dying of the forth-largest inland body of water.
Premium Water supply Drinking water
References: AMU (n.d.). Vito Genovese. American Military University. Retrieved from http://www.lacndb.com/php/Info.php?name=Vito Genovese American Mafia (n.d.). Retrieved from http://www.lacndb.com/Info.php?name=Family - Genovese (Luciano‚ Morello) Bruno‚ A (2010)
Premium Crime Criminology Police
zinc: Mass of ZnMass of ZnCl2×100%=% mass of Zn (1) The percentage of mass of zinc in ZnCl2 was then discovered by inserting the atomic massed of zinc and zinc chloride‚ which can be found on the periodic table‚ into formula 1. 65.39 amu65.39 amu+235.453 amu×100%=47.89% Zn According to these calculations‚ zinc should theoretically make up approximately 48% of the mass of ZnCl2. In order to observe the law of conservation of mass and the law of definite proportions at work in this lab‚ we mixed
Premium Chemistry Mass Chemical reaction