When a mixture of aluminum powder and iron(iii) oxide is ignited, it produces molten iron and aluminum oxide. in an experiment, 5.40 g aluminum was mixed with 18.50 g iron(iii) oxide. at the end of the reaction, the mixture contained 11.17 g iron, 10.20 g aluminum oxide, and an undetermined amount of unreacted iron(iii) oxide. no aluminum was left. what is the mass of the unreacted iron(iii) oxide?

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.