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A measured 43.2 km/hr equals how many m/s? a. b. 11. 7.30 x 102 m/s 4.00...
A hurricane wind blows across a 7.30 m x 18.5m flat roof at a speed of 150 km/hr What is the pressure difference? Express your answer with the appropriate units. How much force is exerted on the roof? Express your answer with the appropriate units.
How many milliliters of 12.0 M HCl should be added to 5.00 x 102 mL of 0.100 M Na2SO3 to produce a pH 7.00 buffer solution. For H2SO3 Ka1 = 1.39 x 10-2 and Ka2 = 6.73 x 10-8.
42. Identify the number of significant digits in the following measured values: a. 2.304 km b. 0.002000 g c. 12.0 mA d. 3.023 X 10^m
Suppose a car travels 102 km at a speed of 30.5 m/s, and uses 2.1 gal of gasoline in the process. Only 30% of the gasoline goes into useful work to keep the car moving at a constant speed. In this problem you may assume that 1 gallon of gasoline produces 1.2 × 108 J of energy. (a) What is the force exerted, in newtons, to keep the car moving at constant speed? (b) If the required force is directly...
Select the conversion factors needed to convert 3.00 x 108 m/s to mi/hr. Choose one or more: A. 60s= 1 min B. 60 min = 1 hr C. 1 cm= 1x 10-2m D. 24 hours = 1 day E 1m = 10-3 km F. 1 km = 0.6214 mi Part 2 (0.5 pt) X Feedback Perform the conversion in Part 1. 6.710 mi/hr
The density of gasoline is 7.30 x 102 kg/m3 at 0°C. Its average coefficient of volume expansion is 9.60 x 104 (c), and note that 1.00 gal 0.00380 m3 (a) Calculate the mass of 11.6 gal of gas at 0°C. (Give your answer to at least two decimal places.) kg (b) tr 1.000 m3 of gasoline at ОС is warmed by 21.2.С, calculate its new volume. (Give your answer to at least two decimal places.) m3 (e) Using the answer...
the sun is 1.50 x 108 km from earth, and the speed of light is 3.00 x 108 m/s. how many minutes elapse as light travels from the sun toearth?please show work
2.9 How many significant figures are in each of the following? a. 11.005 g b. 0.000 32 m c. 36 000 000 km d. 1.80 X 104 kg e. 0.8250 L f. 30.0°C How many significant figures are in each of the following? a. 20.60 mL b. 1036.48 kg c. 4.00 m d. 20.8 °C e. 60 800 000 g f. 5.0 x 10-3L 2.18 2.10
A car is traveling at 55 mi/hr. How many meters/second does the car cover? 25 m/s 39 m/s 58 m/s 15 m/s
D How many moles and how many molecules of zinc chloride are in a weighing 89.5 g? A) 0.432 mol, 2,60 x10-24 molecules B) 0,887 mol, 5.34 x 1023 molecules C)0657 mol, 4.0 x 1023 molecules D) 0.887 mol, 4.0 x 1024 molecules 8) Which of the following underlined items is not an intensive property? A)A chemical reaction requires 3.00 g of oxygen. )Solid copper hydroxide is blue colored C) The density of heliumm at 25 C is 1.64 x...