Percent Composition and Molecular Formula Worksheet 1. What’s the empirical formula of a molecule containing 65.5% carbon‚ 5.5% hydrogen‚ and 29.0% oxygen? 2. If the molar mass of the compound in problem 1 is 110 grams/mole‚ what’s the molecular formula? 3. What’s the empirical formula of a molecule containing 18.7% lithium‚ 16.3% carbon‚ and 65.0% oxygen? 4. If the molar mass of the compound in problem 3 is 73.8 grams/mole‚ what’s the molecular formula? Write the molecular formulas
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Spectrophotometric Determination of Copper in Brass Your Name Here Partners: his/her name here Chemistry 1290-xxx Date Report is Due TA: TA’s name here Purpose: The primary purpose of this experiment was …… Another purpose of this experiment was …… Learning about this type of analysis was important in an everyday context because ... Safety Information: During this lab nitric acid will be used as an oxidizing agent and (NO2) nitrogen dioxide will form. This gas is extremely toxic‚ and should
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Pennies don’t put in their two cents for their place as a part of American currency. It’s not like they’re particularly useful. Almost nobody picks them up unless it’s in the hope that the face of the long-deceased Abraham Lincoln might bring them good fortune of some odd sort. Thieves don’t scrounge around people’s pockets for pennies‚ and then have the person call the police for their missing penny. When most people say that they want to keep the penny‚ most of the time it will simply be an infantile
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Graphene replaced with copper Graphene nanoribbons have a current-carrying capacity two orders of magnitude higher than copper Recent research into the properties of graphene nanoribbons provides two new reasons for using the material for interconnects in future computer chips. In widths as narrow as 16 nm‚ graphene has a current-carrying capacity approximately a thousand times greater than copper while providing improved thermal conductivity. The current-carrying and heat-transfer measurements
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Copper in Silver Nitrate Lab: Making Silver Sabrina Kate S. Carranza – Chemistry Hour 6 I. Purpose: The purpose of this experiment is to distinguish the relationships between reactants and products‚ in addition to expanding on concepts such as single displacement reactions‚ mole ratio values‚ moles to mass‚ theoretical yields‚ limiting reactants‚ excess‚ stoichiometric relationships and percentage errors. II. Hypothesis: /3 -If the copper metal is submerged in the silver nitrate solution
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AT A GLANCE HINDUSTAN COPPER LIMITED KHETRI COPPER COMPLEX KHETRINAGAR KHETRI COPPER MINE Mine Started: - Oct. 1964 1- Ore Body (a) Strike Length 4.80 Km (b) Average Width 10 metres (c) Average Dip 65 deg. (d) Average Grade 1.37 % 2- Ore reserves of Khetri Mine Reserve of Khetri Block : 34.11 Million Tons‚ Grade1.13% Reserve of Banwas Block : 25.39 Million Tons‚ grade 1.69%
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Table 1 Frequency and Percentage Distribution of Respondents According to Age Age Frequency Percentage 15-20 yrs old 13 13.00 21-25 yrs old 6 6.00 26-30 yrs old 11 11.00 31-35 yrs old 12 12.00 36-40 yrs old 17 17.00 41 yrs old and above 41 41.00 Total 100 100% Table 1 showed the Frequency and Percentage Distribution of Respondents According to Age. Majority of the respondents belong to age bracket 41 yrs old and above‚ having a frequency of 41 and percentage of 41%; ages 15-20 yrs old‚ having a
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4.2 Worksheet – Calculating Elasticity of demand 1. Otten Industries sells notebook computers for $800 a computer. Mrs. Otten‚ owner‚ decides to decrease the price of these computers to $750. As a result‚ the quantity demanded for notebook computers rose from 500 to 550. a. Calculate the percentage change in price ___________________ b. Calculate the percentage change in quantity demanded ____________ c. Calculate the elasticity of demand _______________________ d. Is it elastic‚
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We all know the penny‚ it is similar to the avocado due to the fact they both should be eliminated‚ but are still here today. The avocado should have been eliminated because its survival depended on the giant armadillo‚ and the penny should be eliminated because of inflation. Pennies should be abolished because it costs more to make than it is worth‚ we already abolished a coin without bad side effects‚ and most arguments against it have solutions. First‚ the penny costs more to produce than it is
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Quantitative Analysis: % Copper in an Ore May 3‚ 2006 Abstract: In this experiment we were given an unknown sample of ore. Using the spectrophotometric analysis and the electrogravimetric analysis‚ we found the unknown percentage of copper in the unknown sample of ore was to be 17.6% by mass. Introduction: Chemical analysis takes place under two different scenarios. In one case‚ you need to find out the chemical identity of some material. The first kind of analysis‚ in which the chemical
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