What is the variance of x
In Nancy's STAT 225 class, 75% of the students passed (got a C or better) on Exam 1. Suppose we randomly choose 10 students with replacement. Let X be the number of student(s) who passed. What is the variance of X?
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The equation for a van der Waals gas in (P + na^2/V^2)(V-nb)=nRT. 5 moles of the van der Waals gas nitrogen expands irreversible and isothermally from an initial volume of 40.0 liters at 310K, against an external pressure of 2.5 atmospheres.
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If 18.9 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution, what is the molar concentration of the ammonia?
Using activities, calculate the pH of a solution containing 0.010 M NaOH plus 0.012 M LiNO3. What would be the pH if you neglected activities?
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