Calcium hydride (CaH2, molar mass 42.10 g/mol) reacts with water to form hydrogen gas. How many grams of CaH2 are needed to generate 48.0 L of H2 gas at a pressure of 0.888 atm and a temperature of 32°C.? (R = 0.08206 L·atm/mol·K) CaH2 (s) + 2H2O (l) → Ca(OH)2 (aq) + 2H2 (g)
Read DetailsWhen [mLi] grams Li2CO3 is mixed with [mBa] grams BaCl2, a precipitate forms. Give the balanced molecular equation below, determine the theoretical yield of the solid product. (enter your answer as a three decimal and no units, the understood unit is grams) Li2CO3 (aq) + BaCl2 (aq)
Read DetailsBy putting you name here you are confirming that you did not use the internet or get help from any other person for this exam. If this question is blank or if your correct name (first and last) are not here you will receive a zero for this exam. If it is determined that there any type of cheating on this exam you will receive an “F” for CHM1025C and be reported for academic misconduct.
Read DetailsExplain. [4 Points] 12) In a random sample of 28 families, the average weekly food expense was $95.60 with a standard deviation of $22.50. Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval. Assume the distribution of weekly food expenses is normally shaped.
Read DetailsProvide an appropriate response. [4 Points] 5) Decide if it is appropriate to use the normal distribution to approximate the random variable x for a binomial experiment with sample size of n = 48 and probability of success p = 0.6 . Why or why not?
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