Manganese can be extracted from its ore, hausmannite, by heating with aluminum. 3Mn3O4+ 8Al → 4Al2O3+ 9Mn
23 tonnes of ore is processed, and 200.0 kg of manganese obtained. Calculate the percentage by mass of Mn3O4 in the ore.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Select the correct answer a modure consists of glucose and water. what is the percent composition of glucose in the mixture if it contains 1.3 moles of glucose (cho total mass of the mature is 276 grams? ) and the a 1775