Which equation is not balanced? a. 2h2 + o2 → 2h2o c. fe2o3 + 3h2 → 2fe + 3h2o b. 4nh3 + 5o2 → 4no + 6h2o d. 3h2 + 2o2 → 2h3o

Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects

What is the value of keq for the reaction expressed in scientific notation

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d