- How many molecules (not moles) of NH3 are produced from 6.81×10−4 g of H2?

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How to trap hornets without killing honey bees? Quick question: Can someone pls explain this biology question to me, I don't understand what im being question? If you're given 2 system of equations that are planes, and you are given a point, how to find equation of line perpendicular to given? Write each as a single mixed number (with the fraction being proper): a) 2 5/84 + 5 27/28
b) 1 3/5 − 4 2/3
c) 2 1/2 × 1/2
d) 3 9/17 ÷ 3/17? Vector A makes an angle of 20° and B makes an angle of 110° with the x axis. The magnitudes of A= 20 mag of b = 30. Find angle of resultant?