What is formed called when air masses with different characteristics meet

Which statement is true about ionic compounds?

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?