4Al + 3O2 → 2Al2O3 How many grams of aluminum are required to produce 3.5 moles Al2O3 in the presence of excess O2

There is a drought in an area over a long period of time. How could it possibly affect the amount of wildlife that are able to survive in the area.

The dissolution of barium hydroxide in water is an exothermic process. Which of the following statements is correct? A) The enthalpy of solid barium hydroxide plus pure water is less than that of the solution, at the same temperature.

What is the mass of copper that increases its temperature by 285 degrees celsius when 186,000 j of energy is applied?

How many molecules of CO2 are in 132.03 grams of CO2?

The reusable booster rockets of the U. S. space shuttle use a mixture of aluminum and ammonium perchlorate for fuel. The reaction between aluminum metal and ammonium perchloras oxide, aluminum chloride, nitrogen monoxide and water.

How many ions form when 39 grams of calcium fluoride are added to excess water? a. 0.50 mol b. 1.0 mol c. 1.5 mol d. 3.0 mol

Which term specifically describes small chunks of rocks and debris in space that travel through the Earth's atmosphere and hit its surface? meteorites, meteoroids, meteors, meteorides

What is a covalent bond?

Which statement describes how the binary ionic compound CaCl2 is named? The nonmetal is named first, and the ending is replaced with - ide. The metal is named first, and the ending is replaced with - ide.

Calculate the empirical for the molecular formula mass and the molar mass of each of the following minerals: (a) Limestone, CaCO3 (b) halite, NaCl (c) beryl, Be3Al2Si6O18 (d) malachite, Cu2 (OH) 2CO3 (e) turquoise, CuAl6 (PO4) 4 (OH) 8 (H2O) 4