1 a) 0.000600 L has 3 significant figures.
b) 160. m has 3 significant figures.
2. a) scientific notation of
0.00890 X 108= 8.9 x 105
b) scientific notation of
170.90 x 10-3=1.709 x 10-1
f. Decomposition reaction: II. Answer each of the following questions> 1) (2 pts/each) How many significant...
Significant Figure Questions 1. How many significant figures are in each of the following numbers? 2430 0.0251 3 1.010 x 10 243.0 0.0040 900.0 243 7063.1 2.7000 5.98 x 103 2. Using standard scientific notation express 0.14503 meters in: em with 2 signíficant figures km with 4 significant figures 3. Express the following in scientific notation: 6795 to three significant figures 0.42885 to four significant figures
3. (1 pts) How many significant figures in the following a) 350.0452 b) 0.004500 4. (2 pts) Convert the following from scientific notation to decimal or vice versa. Use correct sig tigs. a) 3.221 x 10 mm b) 0.000421 ml c) 6.4100 x 10 km d) 66,070 g 5. (2 pts) Mercury in thermometers freeze at -32.5°C. What is the temperature in degrees Fahrenheit? T = 9/5 T +32°F 2.54cm/1") 6. (2pts) Write the equality and conversion factors (ratios for...
1. Express the following numbers in correct scientific notation. 0.007230 -72800 308.70 2. How many significant figures are there in the following numbers? 650.00 102200 10. 45.034 2.60 x 1022 17.2010 3. Round off the following numbers to TWO significant figures. 34.459 0.07918227 700-2 6.854 x 10- 0.729
Answer the following questions based on the reaction below. At 463 K, the rate constant for this reaction is 1.35×10-4 /s and at 655 K the rate constant is 1.52×101 /s. cyclopentane → ethene + cyclopropane 1. Determine the activation energy (EA) (in kJ/mol) for this reaction. Report your answer to three significant figures in scientific notation. Tries 0/3 2. Determine the pre-exponential factor, A (in /s) for this reaction. Report your answer to three significant figures in scientific notation (Please...
1-the volume of an object is 4.16cm3. its mass is 23.05grams. how many significant figures will its density have? 2- express the following in scientific notation a)63.45 b) 0.0046 c) 86,000.01
How many moles of oxygen are in 8.9E-1 moles of CO_2 2 ? Only give the numeric value of your answer. Don’t include the units. Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5E5 for 2.5 x 10⁵)
In a 2.86E+1 g sample of NaHCO3, how many grams of sodium are present? Use two decimal places in atomic masses. Only give the numeric value of your answer. Don't include the units. i Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5e5 for 2.5 x 105) In a 1.018E+2 g sample of iron(111) oxide, how many grams of iron are present? Your answer should have the...
Question 1 2 pts Which is the best example of a number written in scientific notation? 0.5x 10 O 5.367 x 10-3 V 12.5 x 10 0.1254 Next O h BI hp 8 5 E F G H
To how many significant figures should each answer be rounded? (6.626 x 10-34 J·s) (2.9979 x 10 m/s) = 4.880610663391 x 10-19 J(unrounded) 4.070 x 10-'m equation A: After rounding, the answer to equation A should have 5 significant figures. 2 significant figures. O 1 significant figure. O 3 significant figures 4 significant figures. equation B: (6.022 x 1023 atoms/mol) (0.935 g) 20.18 g/mol = 2.790 x 10” atoms (unrounded) After rounding, the answer to equation B should have O...
1. [2 pts] Solve for x in the below expressions. How many significant figures are there in the values of x? a) x = 21.00 cm - 20.19 cm b) x = (12.0cm) c) x = (6.9 cm)(2.40 cm) d) x=(16.2 g +1.4 g)/(11.2 cm)