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Naturally occurring silver consist of only two isotopes. 107Ag (atomic mass=106.91amu, abundance=48.16%) and the 109 Ag. Determine the percentage abundance of 109 Ag and calculate
What weight of A would be removed from a solution of 10g of an in 100mL of water by a single extraction with 100mL of ligroin? The distribution coefficient, k= concentration in ligroin / the concent
The molar mass of aluminum is 26.98 g· mol-, the molar heat capacity of aluminum is 12.5 J·K-1·mol-1, the molar mass of water is 18.01 g·mol-1 and the density of aluminum
Organic, Suppose you are trying to determine the melting point of a compound, and then the following happens. A) The compound turn from white to brown before melting B) The compound slowly disappe
Assume that it takes someone 17 minutes to get to school when average speed of car is 40 miles per hour. Determine time it takes for someone to get to school when average speed is 19 miles per hour.
Two people begin jogging at same time in straight paths but in opposite directions. One person jogs at 9 mph and other person jogs at 3 mph. Find time when they will be 3.6 miles apart?
Create the stemplot of times. Distribution is roughly symmetric and single-peaked, so distribution of must be close to Normal. Assume that standard deviation 15 minutes is not changed by odor.
Is there important evidence at = 0.10 level against hypothesis that mean is 32,500 pounds for two-sided alternative?
Suppose that probability distribution of lifetimes of participants is approximately the normal distribution with mean of 71 years and standard deviation of 3.5 years. What proportion of plan partici
Before date of trip, 8 more people joined tour decreasing price by $6 per person. Determine original number of tourists in group and original price per person.
Additionally, first prime minus sum's ones digit equals twice sum's tens digit. Last prime minus sum's ones digit equals twice first prime. Sum's ones digit is 1. Determine these three primes?
At $6/pound, red snapper alone brings in $1500. How many pounds of every fish does fisherman catches and find price per pound of each?
Due to market demand, farmer will grow twice as much wheat as corn. He has assigned $63,750 for total cost of growing all crops. How many acres of every crop must he plant?
Find maximum area of the square with side s tilted, inscirbed in the square with side 1 hint from book(use pythagorean theorem- 4 congruent triangles are made with sides 1-t and t and hypo. s)
The ship leaves port and travels due east 15 nautical miles, then varies course to N 20 degrees W and travels 40 more nautical miles. Determine bearing and distance to port of departure.
Determine value(s) of t, if any, when two countries have same population. When is population of Ecalpon double that of Erehwon?
On the day of a child's birth, a deposit of $25,000 is made in the trust fund which pays 4% interest, compounded continuously. Find out balance in this account on child's 29th birthday.
Mary, Jim and Candy are playing HALO. Jim obtains twice as many points as Candy but only a third as many as Mary. Combined total of the points is 9000. How many points each player gets?
The dolomite is a mixed carbonate of magnesium and calcium. Magnesium and calcium carbonates both decompose on the heating to form the carbon dioxide and metaloxides (CaO and MgO).
Sound A measures 20 decibels and sound B is six times as loud as sound A. Determine decibel rating of sound B to nearest integer?
We will now predict the rovibrational spectra of 1H79Br. Using the rigid rotator and harmonic oscillator approximations, determine the rovibrational spectra formed during a v = 0 and v = 1 transitio
Determine the numbers of grams fo Ca3(PO4)2 are needed to prepare 480 ml solution, in which PO4-3 concentrations is 0.25 N. The molecular weight of Ca3(PO4)2is 310 g/ml?
Determine the numbers of grams of anhydrous K2HPO4 (MW 175 g/mole) are needed to make 3Liter solution that contains 0.4 N K+?
Explain at what volume of 0.248 MCaCl2 must be added to 335mL of 0.186 M KCl solution in order to form a solution with a concentration of 0.250 M Cl^-1?
For every rational function below: (i) express domain, (ii) Find all x- and y- intercepts, (iii) Find any horizontal, vertical and slant asymptotes, (iv) using the facts (and plotting the few additi