Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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2. Do the following calculations and use the correct number of significant figures in your answers. Assume all numbers are the results of measurements.
a. 0.208 + 4.9 + 1.11
b. 228 + 0.999 + 1.02
c. 8.543 − 7.954
d.(3.2 × 10−2) + (5.5 × 10−1) (hint: Write in the decimal form first, then add.)
e. 336.86 − 309.11
f. 21.66 − 0.02387
3. State how many significant figures are proper in the results of the following calculations.
a. (106.7)(95.6)(46.210)(1.01)
b. (18.7)2
c. (16.0 ✕ 10−20)(3712)
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Question 21
Make the following calculation and report your answer to the correct number of significant figures rounding the result if necessary.
(8.811 +3.1379)/48.61
meaning add 8.811 to 3.1379 and then divide by 48.61
A Moving to another question will save this response.
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- An antacid tablet weighing 0.853 g contained calcium carbonate as the active ingredient, in addition to an inert binder. When an acid solution weighing 56.519 g was added to the tablet, carbon dioxide gas was released, producing a fizz. The resulting solution weighed 57.152 g. How many grams of carbon dioxide were produced?arrow_forwardNo need to explain. Just give the answers directly. Thank you. 1. Round off 1.274 to one (1) significant figure 2. Round off 1653 to one (1) significant figure 3. Round off 534.5 to three (3) significant figuresarrow_forwardAnswer allarrow_forward
- Express each answer in scientific notation in the units indicated.a. (1.26 × 1 0 4 kg) + (2.5 × 1 0 6 g) in kgb. (7.06 g) + (1.2 × 1 0 -4 kg) in kgc. (4.39 × 1 0 5 kg) - (2.8 × 1 0 7 g) in kgd. (5.36 × 1 0 -1 kg) - (7.40 × 1 0 -2 kg) in garrow_forwardDo the following calculations to the correct number of significant figures: MUST follow the rules of SIGNIFICANT figures a.) 432/7.3-28.523 b.) 0.004 + 0.09879 c.)87.6 + 9.888 +2.3 + 100.77 d.) 5.01 x 105/7.8 x 102arrow_forwardsolve for the follwing probelms stating answers to the proper number of significant figures. use scientific notation when it is indicated for the answers. (2.37 * 10 ^ 3)(8.88 * 10 ^ 4)arrow_forward
- No need to explain. Just give the answers directly. Thank you. 1. If your final answer is 4.5023485 grams, what will you input as your final answer? 2. Round off 0.274 to two (2) significant figures 3. Round off 20.0847 to two (2) significant figuresarrow_forwardExpress the answer to the following calculations in proper number of significant figures.arrow_forwardSomeone invents new units of measurement: grobs, hulks, and blubs. They define that 1 hulk is equal to exactly 103 grob, and that 7 blubs is exactly 377 hulks. How many blubs are in 59.7 grob? O 3.22x106 blub 6.35x10-9 blub 1110 blub 158 blub O 15.8 blubarrow_forward
- Ammonia (NH,) chemically reacts with oxygen gas (0,) to produce nitric oxide (NO) and water (H,o). What mass of water is produced by the reaction of 7.5 g of oxygen gas? Be sure your answer has the correct number of significant digits. x10arrow_forwardAssignment/take Covalent Activity.do?locator=assignment-take $ 4 Submit Answer [Review Topics] [References] Use the References to access important values if needed for this question. a. When 68.938 and 17.6 are added, the answer should be based on 2 significant figure(s). Enter the answer with the correct number of digits. 68.938 +17.6 = 104.54 decimal place(s) b. When 99.137 is divided by 44.926, the answer should be based on 2✔ significant figure(s) Enter the answer with the correct number of digits. 99.137 44.926= 2.21 F4 % 5 Retry Entire Group 4 more group attempts remaining F5 Cengage Learning Cengage Technical Support 6 MacBook Air F6 & 7 A F7 * CO ㅊ입 ▷II F8 ( 9 4 F9 ) A O F10 VOTING NOVE us.shein.com SHEIN X VACA CONTEST art would you II Previous Email Instructor F11 + 11arrow_forwardO CHEMICAL REACTIONS Limiting reactants Gaseous methane (CH) will react with gaseous oxygen (O,) '2, to produce gaseous carbon dioxide (CO2) and gaseous water (H,0). Suppose 11.4 g of methane is mixed with 13. g of oxygen. Calculate the minimum mass of methane that could be left over by the chemical reaction. Round your answer to 2 significant digits. x10 garrow_forward
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