Find the ph of a buffer that consists of 0.91 m hbro and 0.49 m kbro (pka of hbro = 8.64).

why will selection promote the formation of prezygotic barriers between species if postzygotic barriers already exist? The table shows the number of college students who prefer a given pizza topping.ToppingsFreshmenSophomoreJuniorSeniorCheese11162526Meat26261611Veggie16112626Find the empirical probability that a randomly selected freshman prefers cheese toppings.a) 0.208b) 0.047c) 0.491d) 0.141 a uniform magnetic field points upward, in the plane of the paper. then the current is turned on in a long wire perpendicular to the paper. the magnetic field at point 1 is then found to be zero. Draw the total magnetic field vector at point 2 when the current is on. What if Joes marginal cost was $40 per additional hour?Would it make sense for him to keep the restaurant open longer? For how many hours? Explain opportunity cost in making an economic decision Give the IUPAC name for (CH3)2C=CHCH2CH2OH. Spell out the full name of the compound. Submit Request AnswerPrevious question 1. It is assumed that the distribution of the number of pets per household in the US is right-skewed. We suppose the mean is around 3.5 pets with a standard deviation of 1.7 pets. (a) Since the distribution of number of pets per household is right skewed, would the majority of households in the US have a number of pets that is greater than or less than 3.5? (b) Suppose 60 households are randomly selected from Irvine, and we ask them the number of pets that they have and calculate the mean number. What is the expected value of the mean number of pets that the 60 households have? (c) Suppose 60 households are randomly selected from Irvine, and we ask them the number of pets that they have and calculate the mean number. What is the standard deviation of the mean number of pets per household in the sample of 60 households? (Round your answer to 4 decimal places) (d) Why is the standard deviation of the average number of pets per household in the sample of 60 households computed in part (c) much lower than the population standard deviation of 1.7 pets? (e) Suppose that we randomly select a household in Irvine. Could we calculate the probability that this household has more than 4 pets? If so, find this probability. If not, explain why this would not be possible. (f) Suppose 60 households are chosen randomly and their mean number of pets her household is com- puted. Based on the Central Limit Theorem (CLT), what is the approximate probability that the average number of pets in the sample of 60 households is greater than 4? (Round your answer to 3 sig figs) a sine wave will hit its peak value ___ time(s) during each cycle.(a) One time(b) Two times(c) Four times(d) A number of times depending on the frequency The Locard Exchange Principle would identify _____ as physical evidence.A: a large amount of money in the suspect's bank accountB: the screams heard on the 911 callC: calls listed on the cell phone logD: blood on the knife found at the scene Find the volume of 14.5g of krypton pentasulfide (KrSs) at STP. search the web for the term security best practices. compare your findings to the recommended practices outlined in the nist documents. find another angle between 0 and 360 that has the same cosine as 71. (that is, find satisfying cos()=cos(71).) = degrees. help (numbers) the concrete slab for the trash enclosure is ____ How do you assign a point to a surface in Civil 3D? The driver section of a shock tube contains He at P4 = 8 atm and T4 = 300 K. Y4 = 1.67. Calculate the maximum strength of the expansion wave formed after removal of the diaphragm (minimum P3/P4) for which the incident expansion wave will remain completely in the driver section. Bose Einstein Condensation with Rb 87 Consider a collection of 104 atoms of Rb 87, confined inside a box of volume 10-15m3. a) Calculate Eo, the energy of the ground state. b) Calculate the Einstein temperature and compare it with o). c) Suppose that T = 0.9TE. How many atoms are in the ground state? How close is the chemical potential to the ground state energy? How many atoms are in each of the (threefold-degenerate) first excited states? d) Repeat parts (b) and (c) for the cases of 106 atoms, confined to the same volume. Discuss the conditions under which the number of atoms in the ground state will be much greater than the number in the first excited states. state whether the data is continous or discrete The durations of a chemical reaction comma repeated several times Choose the correct answer below. A. The data are continuous because the data can take on any value in an interval . B. The data are continuous because the data can only take on specific values . C. The data are discrete because the data can only take on specific values . D. The data are discrete because the data can take on any value in an interval. salesmix variance = $300,000 (of), salesvolume variance = $470,000 (u), flexiblebudget variance = $230,000 (of), marketsize variance = $34,000 (u), calculate the salesquantity variance. why would an array not be ideal for projects with a lot of data which application delivery method is considered to be in a two-tier pattern in which the presentation is stored on your computer and the code and data are stored on a server? What kind of air would be characteristic of a continental tropical air mass?A. Cold, wetB. Cold, dryC. Warm, humidD. Warm, dry