- How do i make a solution of NH4SCN?

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Thanks in advance. If f(x) is (x^2)+5 when x < 2 and f(x) is 7x-5 when X is greater or equal than 2, then what must be true? 1/f=1/65+1/26.3 what is f? A 13.9 g ice cube is placed into 312 g of water. Calculate the temperature change in the water upon complete melting of the ice.? What happens to vasomotor tone when the patient has increased plasma O2? How many liters of oxygen at 23° C and 1.12 atm will be required for the combustion of 10.0 g of methane, CH4 having trouble?