Hòa tan hoàn toàn hỗn hợp gồm Fe, FeO, Fe2O3, Fe(OH)2, Fe(OH)3 trong dung dịch chứa 0,26 mol H2SO4, 0,22 mol HNO3, thu được dung dịch X(chỉ chứa muối) và 0,05 mol khí NO (sản phẩm khử duy nhất). Cho HCl dư vào X thấy có 0,01 mol khí NO thoát ra. Tính khối lượng muối khan X.

Write a paragraph at least 10 sentences explaining how rocks are used today in society

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood