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The total pressure of a mixture of 15.0 g of carbon tetrachloride gas and 23.5 g of oxygen gas is [x] mmHg.  Determine the partial pressure of oxygen gas in the mixture. (Report your answer in mmHg to nearest whole number, i.e. xxx) (No units are necessary in answer.)  

Consider the following molecules: ethanol (CH3CH2OH), acetic acid (CH3COOH), and dimethyl ether(CH3OCH3).  Which of these molecules is/are expected to form hydrogen bonds? Check all that apply.

Find     when   

Give an appropriate answer.Let  

Find a simplified difference quotient,

Find an equation for the line tangent to the graph of the given function at the indicated point.f(x) = x2 + 3 at (2, 7)

Calculate the instantaneous velocity for the given value of t of an object moving with rectilinear motion according to the given function relating s (in feet) and t (in seconds).s(t) = -2t2 – 7t – 1; t = -4

Find  .

For the function f whose graph is given, determine the limit.Find 

Find the slope of the line tangent to the graph at the given point. y = x2 – 2x + 3  at   x = -1