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Which of the species below is/are a Lewis acid?

Which of the following mixtures will produce a buffer: 0.25 HC3H3O3 M (aq) with 0.45 M LiC3H3O3 (aq) 0.40 M HBr (aq) with 0.40 M NaBr (aq) 0.76 M HCl (aq) with 0.70 M Ca(OH)2 (aq)

What is the pH of 0.721 M ethylamine (C2H5NH2) at 25 oC?

What is the molar solubility of lead (II) fluoride (PbF2), the Ksp is 3.3 x 10-8?

What is the pH of a solution made of 0.552 M cyanic acid (HCNO) with 0.789 M of sodium cyanate (NaCNO)?

Of the Honda Civic sedans available from Carvana, 80% have a rear view camera, 10% have a leather interior, and 8% have both a rear view camera and a leather interior. Are the events “having a rear view camera” and “having a leather interior” independent for these sedans? Explain your answer using appropriate supporting probabilities.

In a recent Gallup survey, participants were asked whether they planned to spend more, less, or about the same on Christmas this year compared to last year. Results of the survey are summarized in the table below by gender. Christmas Spending Gender More Less About the Same Total Male 77 104 314 495 Female 48 182 300 530 Total 125 286 614 1025 What is the probability that a randomly selected participant is female, given that the participant plans to spend about the same on Christmas this year?

Accoding to a 1992 study, adult body temperatures are normally distributed with a mean of 98.20⁰ F and a standard deviation of 0.73⁰ F. What is the standard deviation of the sampling distribution of sample mean body temperatures for samples of 25 adults?

According to a Pew Research Center survey, 30% of American adults have used an online dating site. Six American adults are randomly selected and asked if they have used an online dating site. What is the probability that exactly 3 have used an online dating site? 

According to a 1992 study, adult body temperatures are normally distributed with a mean of 98.20⁰ F and a standard deviation of 0.73⁰ F. What body temperature represents the 75th percentile for adults?