29. A sample of a substance is found to contain 42.59% Na, 12.02% C, and 44.99% 0. What is the empirical formula for the substance?

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

Solar energy is energy from the sun that is converted into thermal or energy. a. nuclear b. mechanical c. electrical d. chemical

What’s the scientific notation for the number 6,840,000,000