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[DOC File]SIGNIFICANT FIGURES
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When adding and subtracting numbers with consideration for significant figures, line up decimals and add or subtract as normal. Then, look at the numbers which you added or subtracted. Whatever the least number of digits that are present in those added or subtracted numbers, to the right of the decimal, that must be the same number of digits to the right of the decimal in your final answer ...
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[DOC File]CHAPTER 2 OUTLINE begin on page 28
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How do you add or subtract numbers in scientific notation? Two ways: Must be same exponent or b) take out of scientific notation ...
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[DOC File]CHM 152 Quiz 1A
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0.075 moles of NH3 X 17.03 g/mol = 1.3 grams of NH3 (2 sig figs) 9. If 1.25 grams of pure CaCO3 required 25.50 mL of a HCl solution for complete reaction, calculate the molarity of the HCl solution. Reaction: 2 HCl + CaCO3 → H2CO3 + CaCl2 . CaCO3 molar mass = 100.09 g/mol 1.25 g CaCO3 / 100.09 g/mol = 0.01249 mol CaCO3
adding and subtracting sig figs

[DOC File]Name
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1.23 12.3 123 all have 3 sig. figs 2. Leading zeros are never significant. 0.0013 = 2 sig. figs. 0.14 = 2 sig. figs 3. Trapped zeros are always significant. 1.002 = 4 sig. fig 4. Trailing zeros are only significant if there is a decimal point explicitly expressed and if they are after a non-zero digit. BE CAREFUL HERE! 12.00 meters = 4 sig. fig
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[DOC File]Significant Figures
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87 009 km has five sig figs Zeros appearing in front of nonzero digits are not significant 0.095 987 m has five sig figs. 0.0009 kg has one sig fig Zeros at the end of a number and to the right of a decimal are significant 85.00 g has four sig figs. 9.000 000 000 mm has 10 sig figs Zeros at the end of a number but to the left of a decimal may ...
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[DOC File]Experiment #1 – Measurements
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The number of sig figs is the number of digits shown when the number is written in scientific notation. 500 g written expressing 3 sig figs would = 5.00 x 102 g . 500 g written expressing 2 sig figs would = 5.0 x 102 g. 500 g written expressing 1 sig fig would = 5 x 102 g. In science the metric system is used almost exclusively. The basic unit of length is the meter (m); of mass, the gram (g ...
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[DOC File]Rules for Using Significant Figures in Mathematical Operations
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How do you determine the number of sig figs in a number or measurement? How do you round to the correct number of sig figs when multiplying, dividing, adding, or subtracting? How do you precisely read a triple beam balance, ruler, graduated cylinder, etc.? Scientific notation. How do you convert a number into scientific notation and vice versa? How do you multiply and divide numbers in ...
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[DOC File]Molarity Notes – H
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Practice Problems: SHOW ALL WORK AND USE PROPER SIG FIGS AND UNITS!!! Calculate the molarity of a solution made by dissolving 29.25g of NaCl in enough water to make 2.00 L of solution. Calculate the molarity of a solution made by dissolving 502g of ammonium nitrate in enough water to make 5.00 L of solution. Calculate the molarity of a solution made by dissolving 25.5g of sodium …
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[DOCX File]CHAPTER 1->3 lecture notes
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are sig. figs. inside the logarithm – uses a lower case “p” to mean “–log” pH . pOH. pKa. pKb. DIMENSIONAL ANALYSIS. Let your UNITS do the work for you. Put the unit you want to cancel on the bottom and the unit you are looking for on the top. Just like Chemistry-I. Convert 2.5 feet into inches: 2.5 feet x 12 inches = 30 inches. 1 ...
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[DOC File]Standardization of a NaOH Solution with Potassium Hydrogen ...
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(Approximate calculation - 2 sig. figs is adequate) Standardization of a NaOH Solution with Potassium Hydrogen Phthalate (KHP) Objective. You will determine the concentration (standardize) of an unknown solution of NaOH using the primary standard, potassium hydrogen phthalate. Introduction . Sodium hydroxide is hygroscopic and absorbs water from the air when you place it on the balance for ...
when multiplying sig figs what's the rule

How do you add sig figs