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What is the maximum amount in moles of P2O5 that can theoretically be made from 112 g of O2 and excess phosphorus? If cos x = 3/7; x is an angle in the fourth quadrant; what is cos(x/2)? 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? Consider the following reaction: 2CH3OH(g)+3O2(g)→2CO2(g)+4H2O(g) what are (a),(b),(c) express as an integer? Two edges of a isosceles triangle are: A(2,-2) and B(6,0). Its area is A=20 cm^2. Edge C=?