Which of the following is a balanced equation for this reaction? a. al + hcl ? alcl3 + h2 b. al + 3hcl ? alcl3 + h2 c. al + 3hcl ? alcl3 + 3h2 d. 2al + 6hcl ? 2alcl3 + 3h2

Diamond will scratch quartz. true or false

Which of the following are guidelines to follow for obtaining accurate observations

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.