Question 11 Which of the following is a disadvantage of solar energy?
O the solar energy is free
O it produces waste and pollution through greenhouse gases
o it's costly to build solar power stations
O it can be replenished

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Acylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon and 5.00 moles of helium. if the gas mixture is at stp, what is the partial pressure of the argon

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.