bEAN BAG ISOTOPES:ABUNDANCE AND ATOMIC MASS LAB By: Catriona Whalley Partner: Ming Siegel Due: 1.14.10 Prelab A new atomic theory‚ in which all atoms of the same element are identical to one another and equal in mass‚ was proposed by the scientist Dalton. Although the theory had its flaws and was simple‚ it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon‚ isotopes were discovered‚ as atoms of the same element
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CHM130 Lab 5 The Atomic Mass of Beanium Name: Paige Miller A. Data Table: Insert your Data Table here with your sample calculations. You must show at least one sample calculation per procedure step. (16 points) Part I Data Table Sample Mass (mg) Number/Qty Average Mass (mg) Relative Abundance Relative Weight (mg) Kidneybeanium 1660.00 mg 3 553.33 mg 0.2143 118.58 mg Pintobeanium 2830.00 mg 6 471.67 mg 0.4286 202.16 mg Blackeyedpeaium 1110.00 mg 5 222.00 mg
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Running head: PERSONAL ESSAY Personal Essay of Marie Moore Marie Moore COLL100 B020 American Public University PERSONAL ESSAY Personal Essay of Marie Moore The following is a personal essay about various topics about my college education and my learning styles. This personal essay will include thoughts or reasons for seeking a college degree. As well as my own personal learning styles‚ which are based upon inventories that have been taken. This personal
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Personal Essay John Doe COLL100 D114 American Public University Personal Essay The following is a personal essay about my learning style. In this essay I will discuss my reasons for seeking and pursuing a college degree. It will also include my learning style that was calculated from the inventories that we have taken. I will also give my thoughts and personal opinions on my learning styles based on the inventories‚ and weather I agree or disagree with them. In this essay I will discuss
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Abstract In the Lab Determining the Empirical Formula of Magnesium Oxide‚ students set out to find if there is a true 1:1 ratio in the empirical formula of MgO. This was determined by burning the Magnesium until a white smoke started to protrude. This showed the reaction of Oxygen combining with Magnesium to form Magnesium Oxide. This was then measured again and turned out to be slightly heavier than the measurement before. This added weight is Oxygen‚ forming the combustion of Magnesium Oxide.
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moles of wanted substance to desired units. Converting from Grams to Moles NOTE: One mole of anything contains 6.022 x 1023 atoms Atomic weights on the periodic table are given in terms of amu (atomic mass units)‚ but‚ by design‚ amu correspond to the gram formula mass. In other words‚ a mole of a 12 amu carbon atom will weigh 12 grams. The gram formula mass can be used as a conversion factor in stoichiometric calculations through the following equation: Moles = Converting between Volume
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̅ E. sulfate ion = SO42 ̅ 5 How many molecules are in 0.25 mole of Na2O? A. 4.5 × 10(23) B. 0.75 C. 1.5 × 10(23) D. 4.2 × 10( ̅ 25) E. 0.25 6 Calculate the molar mass of Na2SO4. A. 94.05 g/mol B. 71.06 g/mol C. 142.05 amu D. 142.05 g/mol E. 94.05 amu 7 If 4.05 × 1023 molecules of a substance have a mass of 86.2 g‚ what is the molar mass of the substance? A. 128 g/mol B. 3.49 × 1025 g/mol C. 2.13 × 1022 g/mol D. 4.70 × 1021 g/mol E. 58.0 g/mol 8 A 6.25 g sample of magnetite
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BEAN BAG ISOTOPES:ABUNDANCE AND ATOMIC MASS LAB Prelab A new atomic theory‚ in which all atoms of the same element are identical to one another and equal in mass‚ was proposed by the scientist Dalton. Although the theory had its flaws and was simple‚ it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon‚ isotopes were discovered‚ as atoms of the same element which have been built up to have different masses. Purpose
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Negligible (too small to count) What is the mass of an electron? 1 AMU or g What is the mass of a neutron? Increasing atomic number Elements on the periodic table are arranged in order of … # of electrons = # of protons What is the relationship between protons and electrons? 2 How many electrons can the first
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Different Styles of Learning By Jason D. Himel COLL100 DO41 WIN 13 American Military University Maureen Horowitz As individuals I found we all learn in many different ways. You have from people learning on-line while other attends a class room environment. Some people are hands on learners while others can read an assignment and retain the information very well. When I first started this exercise I thought to myself how I learn the material I am trying to obtain. After taking all four of
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