Determine the mass percent composition of aluminum
The 4.78-g sample of aluminum totally reacts with the oxygen to outline the 6.67 g of aluminum oxide. Use this data to determine the mass percent composition of aluminum in the aluminum oxide.
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The electric field within a conducting metal car is zero. When the car is negatively charged by lightning, the electric field within the car is then
Determine the numbers of calcium are needed to react with the 1.55g of water to make the calcium hydroxide and the hydrogen gas?
The bridge is to be built in shape of the semielliptical arch and is to have the span of 100 feet. Height of arch, at the distance of 40 feet from center, is to be 10 feet. Determine height of arch at its center.
The 1.45 g sample of phosphorus burns in the air and outlines the 2.57 g of a phosphorus oxide. Describe the empirical formula of the oxide. Express your answer in detail as a chemical formula.
The mass of drum is 150 kg and its radius is 0.76m. Determine the magnitude of the torque the engine applies to the drum? Avoid the mass of the cable.
Fingernail-polish remover is primarily acetone (C3H6O). Determine the numbers of acetone molecules are in a bottle of acetone with a volume of 405 mL? (the density of acetone =0.788 g/cm3 ).
If an area of triangle ABC is 14 square meters, with a = 20 m and b = 8 m, determine all possible measures for angle C.
The rock in a particular iron ore deposit contains 83 %Fe2O3 by mass. Determine the number of kilograms of the rock must be processed to obtain the 1300 kg of iron?
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