Math Practice Lab Essay Example for Free

Math Practice Lab try outMath Practice LabPre-Lab Questions1. The rules concerning discussion world-shattering figures atomic tot 18 as marrys When dividing/multiplyingThe dress has no more than significant digits than the number with the fewest significant digits (the least(prenominal) precise figure). Round off later calculations affirm been performed.When adding/subtractingAnswer has no more specifys than the addend, minuend, or subtrahend with the fewest number of denary places. Significant figures are impertinent when adding/subtracting (least number of decimal places rule). 2. The concepts for using scientific notation is to allow the scholar a form to asses the society of magnitude and to visually decrease the zeros. It allows the student to compare very large or very sharp numbers and to better understand those numbers. Scientific notation in any case tells us about significant figures. An theoretical account of scientific notation would be the age of the earth.ExampleThe approximate age of the earth is 4,600,000,000 years old. employ scientific notation this number would look like 4.6 * 109. Scientific notation is shorter and easier to read than 4,600,000,000. 3. The rules for handling scientific notation are as follows If the co-efficient is great than one the exponent will be positive. If the co-efficient is slight than one the exponent will be negative. The topic must be 10.The exponent must read the number of decimal places that the decimal needs to be moved to change the number to standard notation. trailing zeros are significant . Leading zeros are not significant. The decimal place in the beginning goes later on the first non zero digit. ExampleConvert 60,300,000 to scientific notationCoefficient is greater than one. Decimal place goes after the first non zero number. note that 6.03 is greater than one. The base must be 10. Therefore, 6.03 * 10Exponent must show the number of decimal places.6.03 * 107PurposeMath Pr actice Lab is meant to receive the basic chemistry student an opportunity to become familiar with necessary math skills that are ordinarily used in science. These abilities include the chance to demonstrate the use of scientific notation, algebra, density calculations and the use of reincarnation formulas. Procedure and Data SheetsBefore coming to lab read the practice lab in advance. stand in any assignments that are due before the beginning of the math lab. Familiarize your self with the most putting surface tables used in chemistry such as, the Base SI units, Derived SI units and with the Greek Prefixes used with SI units. Knowledge of formulas such that of density, mass and volume are recommended. Being able to use conversion factors are of great importance to succeeding in chemistry. When using the unit factor rule for solving problems be authentic to not skip steps. When answering questions make sure your calculation is correct and express the answer using the correct scientific notation and significant figures. When using units make sure to follow with the immaculate abbreviations. Make sure to follow the rules when working problems that involve algebra. Make sure that you bring your calculator, plenty of stem and pens to the math practice lab.Base SI Units use in ChemistryDerived SI UnitsGreek Prefixes Used with SI UnitsCommonly Used FormulasConversion Factors( not all conversion factors are included)ObservationsPrecision and verity are highly main(prenominal) when coming up with a measured value. Precision is the closeness of a series of measurements to one another. Accuracy is the measure of correctness. The closeness of a measured result to the true value. doubtfulness is indicated by the number of digits in a measurement. Retaining the least uncertainness is priority. Rules for determining the number of significant figures are All non zero digits are significant.Zeros between zero digits are significant.Leading zeros are never signif icant. tracking zeros after a decimal point are significant.Trailing zeros before a decimal place may or may not be significant. When dividing/multiplyingThe answer has no more significant digits than the number with the fewest significant digits (the least precise figure). Round off after calculations have been performed.When adding/subtractingAnswer has no more places than the addend, minuend, or subtrahend with the fewest number of decimal places. Significant figures are irrelevant when adding/subtracting (least number of decimal places rule). 4. Scientific notation is used to help visualize the order of magnitude and to visually decrease the zeros. This method is used to compare very large numbers and very small numbers. Scientific notation also tells us about significant numbers. There are several rules for using scientific notationIf the co-efficient is greater than one the exponent will be positive. If the co-efficient is less than one the exponent will be negative. The base must be 10.The exponent must show the number of decimal places that the decimal needs tobe moved to change the number to standard notation. Trailing zeros are significant . Leading zeros are not significant. The decimal place in the beginning goes after the first non zero digit. 5. Problems involving algebra should be solved by following certain rules What you do to one side should also be done to the other side. This allows for easier rearrangement of terms. rewrite problems so that variables and coefficients are not lost in the transition of doing calculations. This allows the student to be able to follow a lot easier. 6. When using the Unit Factor Method it is very important to make sure to not skip any steps. Use all the necessary units so that all the units that are infallible cancel each other out. Leaving you with the only unit or units needed to convert to your answer. Not using the adequate units or formulas will result in the wrong answers and could risk the precision an d accuracy of the results. Lab QuestionsRefer to the Lab Paq (Math Practice Lab Pages 23-29)ConclusionThe use of Scientific Notation, and the importance of algebra, zeros and significant figures are all math skills that are important in helping a chemistry student understand many aspects of science. Grasping these skills are important because it allows the student to visualize the magnitude of what is being compute in a much smaller or larger perspective.The use of significant figures gives us the least uncertainty possible, therefore resulting in precise or accurate values. This is important when it comes to working in antithetical areas of science because the answers to calculations could mean the difference between life and death. Let us consider a longanimous at a hospital who is in a lot of distress. The patient requires an injection of 0.16 whit (not 16 grain) of a pain killer that is only available as a 15 mg/mL solution. How many ccs should be administered to the patien t? Considering you are the nurse that is caring for this person it is important that you know how to convert grains into mg/mL. The first thing to do would be to gather the conversion factors needed. 1 grain = 64.8 mg and 1cc = 1 cm3 = 1 mL. The problem would look like 0.16 grain * 64.8 mg/ grain * 1 mL/15 mg *1 cm3/1mL * 1cc/1cm3 = 0.6912 cc The units will cancel out until the desired unit in this case ccs is reached. In this case it is important to contain the rules for significant figures.There are two significantfigures in 0.16 grain. In science it is important to apply the rules for significant figures even though we do not apply these rules when working in a math class. Abiding by these rules will give the least uncertainty possible resulting in a precise measurement. The patient will be administered 0.69 ccs of the pain killer.Physical quantityName of UnitAbbreviationLengthMeterm muckle kilokgTimeSecondsTemperatureKelvinKAmount of substanceMole molPhysical quantityName of Un itAbbreviationVolumeCubic meterm3PressurePascalPaEnergyJouleJElectrical chargeCoulombCGreek prefixMeaningPico-(p)One-trillionth (10-12)Nano-(n)One-billionth (10-9)Micro-(mc)One -millionth (10-6)Milli-(m)One-thousandth (.001)Centi-( c )One-hundredth (.01)Deci- (d) tenth (.1)Kilo-(k)One-thousandth (1000)Mega-(M)One million (106)Giga- (G)One billion (109) closeness =Mass/VolumeMass =Density * VolumeDegree Fahrenheit(postnominal) =32+9/5 ( Degree Celsius)Degree Celsius =5/9(Degree Fahrenheit 32)Kelvin =Degree Celsius + 273.15Length1 km = 0.62137 mi1 mi = 5280 ft = 1.6093 km1 m = 3.28 ft= 39.37 in.=1.0936 yd1 in = 2.54 cm (exactly)1 cm = 0.39370 inMass/Weight1 kg = 1000 g = 2.2046 lb1 lb = 16 oz = 453.6 g1 ton = 2000 lbVolume1 L = 0.264 gal1 gal = 4 qt= 3.7854 L1 cm3 = 1 mL33.81 oz = 1 LEnergy1 J = 0.23901 cal1 cal = 4.184 Joule (J)