Determining the Limiting Reactant and Percent Yield in a Precipitation Reaction Objectives: Observe the reaction between solutions of sodium carbonate and calcium chloride. Determine which of the reactants is the limiting reactant and which is the excess reactant. Determine the theoretical mass of precipitate that should form. Compare the actual mass with the theoretical mass of precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution‚ Na2CO3(aq)
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iodide and 10.0 mL of 0.200 M lead (II) nitrate are mixed together. 1. Write the net ionic equation describing the reaction. 2. Calculate the theoretical yield. Show calculations. 3. a) If a student obtains 0.890 g of lead(II) iodide‚ calculate the percent yield? Show calculations. b) Suggest possible reasons for a percent yield greater than 100%. c) Suggest possible reasons for a percent yield less than 100%. Lead
Free Stoichiometry Chemical reaction Chemistry
shouldn’t use a piece of paper because due to the surface area and weight of the paper‚ the fall would be slower which would affect further calculations. However‚ if you used a weight which was heavy enough‚ the effect of air resistance would be minimal. For our experiment‚ we would use several things which would help us gather data so that our calculations would be nearest to the true value of g (acceleration due to gravity). One object which we used was a pulley system. We put a string through
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FAFNA – Profit-Cost-Volume Problem SHOW YOUR WORK FOR CALCULATION PROBLEMS Based on the following information‚ complete the problems listed below on the Airwolf Helicopters Company. [In $ Dollars 000] Sales……………$75‚000 Gross Margin…60% Op. Expenses..$12‚000 # Units shipped…15 Operating Profit? Gross Profit (GP)= Gross Margin x Sales = 75‚000 x 0.60 =45‚000 Operating Profit (OP)= GP-Operating Exp (OE) OP= 45‚000-12‚000 OP= 33‚000 The remaining questions are based on the following
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UnitPrice as real Display "Marc’s Unit Pricing Program" Display "This program will break down the weight of an item from pounds to ounces‚ and will then give you the price per ounce for the product listed." Call Input Data Module Call Perform Calculations Module Call Output Results Module End Main Module REM now we get all the pertinent information that we need. Input Data Module Display "Name of the Item?" Input Name Display "How much does it cost?" Input Price Display "Item Weight
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Business Entities 5 Calculations of NPV‚ IRR and Payback Period 5 Selection of Projects 8 Changes in the NPV with cost of capital 8 Changes in the IRR with cost of capital 9 Difference of sensitivity between Long-term and Short term NPV 9 NPV versus IRR 9 Conclusion 10 References 11 ABSTRACT This paper covers the implementation of three investment appraisal methods. Initially‚ importance of investment appraisal has been analyzed. Secondly‚ calculations have been done for Net
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were familiar with the idea of inbound marketing‚ so less training time to be spent with them. Disadvantages in serving Market Marys: * Harder to reach and longer selling cycles. * Cost of acquisition is more ($ 5‚000). Life time value calculation of present Hubspot customers Assume interest rate to be 5% annual | Customer type | Monthly Churn rate | Margin per month | Consulting fee paid at joining | Acquisition cost | Percentage of total customers | Life time value (including consulting
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skills in a range of different contexts. One of the examples that can be given here for good value deals is that in my ICT lessons‚ I was teaching spreadsheets‚ and as you know spreadsheet allows one to be able to calculate calculations using formulas‚ so no real calculations are carried out mentally/using a calculator. Now‚ in order to check their understanding I get my learners to carry out a simple method to see whether they are able to calculate expenses. So in order to check whether they are
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The results only give an indication about precision; they give no indication of accuracy. Accuracy is a measure of how close the results are to a known literature value; however‚ because a known molarity for the hydrochloric acid is not known‚ a measure of accuracy cannot be made. In contrast‚ a measure of precision can be made using the results. Precision refers to how close a set of results are to each other. In this lab‚ the percent relative average deviation can be used as an indicator of preciseness
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Pinkerton Group Project Executive Overview The security guard services industry consisted of two segments: proprietary guards and contract guards. The historical growth was driven by companies realizing‚ that contracting guards allowed them gain operating flexibility instead of managing their own security personnel. In 1987 security guard services was a $10 billion industry growing at 6% a year. Due to the industry being very mature‚ fragmented‚ and price competitive there was an ongoing
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