General Chemistry

To answer this type of question, you will need to type the numeric value for distance in the rectangle between the quantity you are solving for (distance) and the units (meters). In addition to typing alphanumeric values from your keyboard, you can enter non-numeric information by using either  the menu tabs above the rectangular answer box (for more information click Help ) or  the equivalent key strokes, as listed in the Shortcuts menu. Grading Tolerance  For grading, your numeric answers often (but not always) can be within a tolerance range of the official answer. For example, if the answer to a numeric problem with a tolerance of 2% were 105, answers between 103 and 107 would be graded as correct.  If you submit an answer that is rounded to within the grading tolerance but is not the exact answer, you will receive full credit. If this value is needed in future parts keep all the digits and round as the final step before submitting your answer. Significant figures  Most questions with numeric answers will require your answer to be given to at least three digits or significant figures.  Your answer may be graded as incorrect if you have calculated correctly but then rounded your final answer to too few digits. If a different number of significant figures is required, this will be part of the question's answer instructions.  When you need to do multiple calculations to get an answer, use more significant figures than required in each calculation and round at the end only. Rounding too early can cause your final answer to be outside the tolerance range. Part A For most answers, you will simply enter your numeric answer directly into the space provided to the right of the equal sign. Answer the following question by typing the numeric answer into the answer box. If you have a gross of items, you have 144 items. If you buy a gross of eggs, how many dozen eggs do you have? Hint A.1 How many items are in a dozen? Hint not displayed Express your answer in dozens. Do not enter the units; they are provided to the right of the answer box. ANSWER :   number of eggs = 12 Correct   Part B When entering large numbers in the answer box, do not use commas. For example, enter 1276400 for the number 1,276,400. Do not enter 1,276,400 . If you accidentally enter commas, you will get a message that your answer has the wrong number of terms. Answer the following question by typing the numeric answer into the answer box. What is the sum of 9260 and 3240? Hint B.1 How to compute the sum Hint not displayed Express your answer numerically to at least three significant figures. ANSWER :   sum = 12500 Correct Note that you can always review exactly what you typed in the answer box by clicking My Answers . Scientific notation You may want to enter 367,000,000 in scientific notation as .  Instead of the symbol, use a multiplication dot ( ) by typing the keyboard multiplication symbol *  (Shift + 8).  To input the exponent for numbers written in scientific notation, do either of the following: o Click the button found under the menu. o Type ^ (Shift + 6) from your keyboard. For example,  can be entered in the answer box by typing 3.67*10^8 .

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