Chemistry

The mass of fuel in an airplane must be determined before takeoff. A jet contains 13427 L of fuel after it has been filled with fuel. What is the mass of the fuel in kilograms if the fuel’s density is 0.769 g/cm^3? Express your answer in kilograms to three significant figures.

EXPERT ANSWER Mass of fuel = 10,325.363 kg or 1.03 x 104 kg Explanation : Volume of fuel = 13427 L Density of fuel = 0.769 g /cm^3 We have to change the unit of density —> 1 cm^3 = 0.001 L So, 0.769 g/cm^3 = 0.769 g / 0.001 L = 769 g/L Now, Use …

The mass of fuel in an airplane must be determined before takeoff. A jet contains 13427 L of fuel after it has been filled with fuel. What is the mass of the fuel in kilograms if the fuel’s density is 0.769 g/cm^3? Express your answer in kilograms to three significant figures. Read More »

A bag contains a mixture of copper and lead BBs. The average density of the BBs is 9.98 g/cm3 . Part A Assuming that the copper and lead are pure, determine the relative amounts of each kind of BB. The density of copper is 8.96 g/cm3. The density of lead is 11.4 g/cm’. Express your answers in percent to two significant figures separated by a comma. VALO ? Percent of copper, percent of lead = % Submit Request Answer

EXPERT ANSWER The percentage of copper is 58.2% and the percentage of lead is 41.8%.

The speed limit on some U.S. highways is 80 mi/hr. Convert this speed into each alternative unit.

Part A: km/day Part B: ft/s Part C: m/s Part D: yd/min EXPERT ANSWER a) 2 miles per hour to kilometer per hour = 1.0693 80 miles per hour to kilometer per hour = 1.0693 * 80 = 128.7475 km/h b) 2 miles per hour to foot per second = 2.9333 80 miles per hour …

The speed limit on some U.S. highways is 80 mi/hr. Convert this speed into each alternative unit. Read More »