120_Chapter2_measurements_practice_key

2. Report the answers of these calculations to the correct number of significant figures: (a) 5.354 x 4.812 x 6.8312 = ? (b) 29.4464 + 10.395 +5.20853= ? (c) (5.7268 x 10¹) (6.9 x 10¹0)/1.0= ? (Report answer in exponential notation.)

7) (3.4617x 102) (5.61 x 10-4) (9.87x 105) (3.1) (1.171 x 104) = 8) (3.52164 x 102)(3.1741 x 105) (8.22 x 107) (4.65217 x 10-3) (9.711 x 104) 9) (1.8741 x 1011) (5.6 x 104) (2.173 x 108) || 10) (1.745 X 100) (9.51 x 107) = (16.21) (9.346 x 10-10)

Perform the following mathematical operations, and express the result to the correct number of significant figures.

For the following calculations and questions, use all applicable rules of sig figs and rounding to determine the answers:   0.53 x 12.3 x 1.321 =  15.1 + 20.  +  130  =  How many sig figs in the number 0.00040   How many sig figs in the number 500.       What is the exact answer to 8.00/4.00 =

Are the answers written using the right number of significant figures? Explain. 1) 15.20+37580+29.5876= 37625.0 2) (3.46*10^3) x( 4.7*10^2)= 1.63 x10^6 3) 513 x 410= 210330 4) 14.0/11.263= 1.24 5) 3134*0.000054= 0.1692| 1 FOcus

221.2+26.7+402.9

Report all numerical answers to the correct number of significant figures! (a) Give the names of the following elements: (i) Ag (ii) V (b) Give the symbols of the following elements: (i) aluminum (ii) copper 1. 2. Report the answers of these calculations to the correct number of significant figures: (a) 3.7793 x 8.324 x 7.4976 = ? (b) 10.4071 +66.1441 +12.515 = ? (c) (7.971 x 10¹7) (3.75 x 10³)/7.8416 = ? (Report answer in exponential notation.)

10. Perform these operations in scientific notation with the appropriate number of significant figures. (a) 3.407 ✕ 106 + 1.29 ✕ 108, (b) (3.407 ✕ 106)/(8.1 ✕ 10−2), (c) 80*10-5 km + 1.14*105 cm.

What is the number of significant figures in each of thefollowing measured quantities? (a) 601 kg, (b) 0.054 s,(c) 6.3050 cm, (d) 0.0105 L, (e) 7.0500 x 10-3 m3, (f) 400 g.

What is the number of significant figures in each of thefollowing measured quantities? (a) 601 kg, (b) 0.054 s,(c) 6.3050 cm, (d) 0.0105 L, (e) 7.0500 * 10-3 m3, (f) 400 g.

Q9. I am unsure on how to get the final answer. I believe we have to convert the number to scientific notation but I’m not sure how they got that answer.

Perform the following calculations and report each answer with the correct number of significant figures. (a) 635 ✕ 335 (b) (5.23 ✕ 102) ✕ (6.8 ✕ 103) (c) 27.2/13.383 (d) 8179 ✕ 0.000051 (e) 14.23 + 27360 + 84.5721 (f) 47.2 + 0.291

Perform the following calculations and express the answer with the appropriate number of significant figures: 1 (46.21 × 2.55) − (2.643 × 0.662) 2. (1.00866 − 1.00728) / (6.02205×1023 ) 3.(22.614 − 19.3) / 19.

2. Perform the indicated operations and give answers in the indicated unit and with the proper number of significant figures. (a) 113.137g-2.047 g 50.0 mL-37.40 mL (in g/mL) (b) 25.50 g +462 mg + 0.0100 kg (in g) (c) 0.900 mm * 0.8750 cm * 0.0031489 m (in cm³)

I don't know :(

33. State whether each of the following conversions is possible or impossible and WHY. For any examples that are possible, perform the conversion and report your answer to the correct number of significant figures. (a) 20. mL → cm² (b) 2 mL → m³ (c) 10. m³ in. ft² (d) 3 mm² (e) 10. lbs. of aluminum → cm³ (Hint: This one IS possible).

How many significant figures are present in(a) 4.01 102(b) 8.256(c) 100

Mass (g) Height (cm) Diameter (cm) Cylinder A 15.560 5.11 1.20 Cylinder B 35.536 5.90 1.30 In your calculation use the value 3.14 for π. Write your answer to the correct number of significant figures.  Calculate the volume of Cylinder A and B using the dimensions of the cylinder.

3.) Perform the following calculations. Express your answers in scientific notation (1 pt each) using the correct number of significant figures. a) (0.000414000) + (7.80 x 10-11) 40 14×1054 7.8 X 10-11 = 0.53 077X10 [5.3077x10 c) (9.612 x 5.00)- 35.20 -4+11 9612x5-35.2 48.06-35.20 $12.95 - (1.286 X10' b) 118 +3020.760 3020.760 + 118.000 13138.760 |scientific No *13138.761 C 7 -0.03906 11 3.906x10

Complete the following operations and write your answer with the correct number of significant figures. Use scientific notation when appropriate. (7.87 x 10-5)(1.84 x 10-2) =

Need help with b and c

3. Perform the following calculations reporting your answer to the correct number of significant figures and with the correct units. a) 25.4 mL 21.4 mL = 1 1 kg b) 123.4 g * 1000 g c) 120.5 g + 32.567 g = conversion factors & calculations | EXP 2

Determine the number of the following:(a) square meters in 1 square kilometer(b) cubic centimeters in 1 cubic meter(c) square meters in 1 square mile (1 mi = 5280 ft2) How do you do this? Also, how do I know which units are equal to each other (ex: cc/cm3= mL)?    Chemistry is killing me please help.

I'm not sure if I'm doing them correctly

How many significant figures are in each of the following numbers (assume that each number is a measured quantity)?(a) 4.003, (b) 6.023 * 1023, (c) 5000.