4. What is the total number joules of heat energy needed to change 150 g of ice to water at 0 °C?
Please help it’s due 11:59

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

An excess of lithium oxide undergoes a synthesis reaction with water to produce lithium hydroxide li2o+h2o→2lioh if 1.05 g of water reacted, what is the theoretical yield of lithium hydroxide? a) 5.83 x 10–2 g lioh b) 1.17 x 10–1 g lioh c) 2.79 x 100 g lioh d) 1.40 x 100 g lioh

What is the percent by mass of oxygen in fe2o3