- Calculate the density in g/L of CHF3 at STP?

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In the ionic compound Aluminum Phosphide, how many Aluminum ions are present? Two positive numbers, a and b, have the properties that their difference, product, and sum are in the proportions 1:3:2. What are the #'s? What is the pattern for 4,2,8,6,12,10? -5 sqrt 14 - 6 sqrt 2 + 8 sqrt 2 +4 sqrt 14? Do all life on Earth share a common ancestor known as the last universal common ancestor, which lived approximately 3.5–3.8 billion yrs ago?