The molecular mass of nicotine is 162.1 grams. Nicotine contains 74.0% carbon, 8.7% hydrogen, and 17.3% nitrogen. Determine it's molecular formula. A). C10H14N2
B). C6H8N4
C). C5H7N
D). C3H6N

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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

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

What is the relationship of air masses and the temperature of oceans?