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You bet a friend that 90% or more of the students taking the Bio 101 class know their blood type. You contact a simple random sample of 80 students taking Bio 101 this term to test the hypothesis and find that 77 students know their blood type.
a) Check the sample size and explain why you cannot use the Z-method for the test?
b) Use the Binomial method, compute the pvalue for the test and conclude. Hint: The p value is the probability of getting as least the same or more people than in the sample (77 students) know their blood type. If the pvlaue is less than 0.05, Ho is rejected.
The Ksp of beryllium hydroxide, Be(OH)2, is 6.92 x 10^-22. Calculate the molar solubility of this compound
What is the pH of a 0.3656 M solution of the sodium salt of a weak acid with a pKa of 3.745? The answer is not pH = pKa + log(salt)
How would you make a .500L of a single solution that was 0.00700 M NaCl and 0.143 M KCl? Be complete with your directions (like a recipe with amounts, glassware, etc.)
Problem- Calculate the pH of a buffer solution that is 0.60 M in NH4Cl and 0.75 M in NH3. (K b = 1.8 x10^-5 for NH3)
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a certain anesthetic contains 64.9 percent carbon 13.5 percent hydrogen and 21.6 oxygen by mass. determine the
In 50.1 grams of water, the solubility of KF is 10.1 grams. How many grams of KF dissolve in 133.0 grams of water
At a local convenience store, you purchase a cup of coffee, but ,at 98.40C, it is too hot to drink you add 23.0 g of ice that is -2.20 C to 248 ml of the coffee. What is the final temperature of the coffee
Metabolic regulation is achieved via regulating enzyme activity in 3 ways: allosteric regulation, covalent modification, and enzyme synthesis/degradation.
what mass of solid sodium formate (of mw 68.01) must be added to 105 ml of 0.55 mol/l formic acid(HCOOH) to make a buffer solution having a ph of 3.96? ka=0.00018 for HCOOH
If 86.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
For 1 mol of an ideal gas, pext = p = 101 kPa (pressure remains constant). The temperature is changed from 100 degrees C to 25.0 degrees C. Calculate q, w, ΔU and ΔH. Assume CV,m = 3/2 R.
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