Chemistry

Chemistry, 30.08.2019 19:30, joseandpauline

What is the ph pf a 0.0190 m solution of hf?

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Mathematics, 05.07.2019 02:10, princessa15266

Score: 0 of 4 pts gen interest 9.3.23 a shipment contains 13 igneous, 11 sedimentary, and 11 metamorphic rocks. if 7 rocks are selected at random, find the probabillity that exactly 5 are sedimentary the probability that exactly 5 of the rocks are sedimentary is 0.0190 (round to four decimal places as needed.)

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Mathematics, 11.07.2019 09:30, gilcarrillo146

1. which domain restrictions apply to the rational expression? x^2+5x+6 x^2-9 select each correct answer. x≠2 x≠1 x≠−3 x≠3 x≠−2 x≠−1 (4x)/(x-3)+(2)/(x^(2)-9)= (1)/(x+3) a. 19/3 b. 13/3 c. -5 d. -17/3 9. which statement best reflects the solution(s) of the equation? 1/x + 1/x-3 = x-2 / x-3 a. there is only one solution: x = 1. the solution x = 0 is an extraneous solution. b. there is only one solution: x = 1. the solution x = 3 is an extraneous solution. c. there is only one solution: x = 3. the solution x = 1 is an extraneous solution. d. there are two solutions: x = 1 and x = 3. 10. (√3x+1)−x+3=0 a. there is only one solution: x = 1. the solution x = 8 is an extraneous solution. b. there is only one solution: x = 8. the solution x = 1 is an extraneous solution. c. there is only one solution: x = 8. the solution x = 0 is an extraneous solution. d. there are two solutions: x = 1 and x = 8.

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Chemistry, 23.07.2019 09:00, briannagisellegarcia

Let us assume that cu(oh)2(s) is completely insoluble, which signifies that the precipitation reaction with naoh(aq) (presented in the transition) would go to completion. cu2+(aq)+2naoh(aq) → cu(oh)2(s)+2na+(aq) if you had a 0.800 l solution containing 0.0190 m of cu2+(aq), and you wished to add enough 1.35 m naoh(aq) to precipitate all of the metal, what is the minimum amount of the naoh(aq) solution you would need to add? assume that the naoh(aq) solution is the only source of oh−(aq) for the precipitation.

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Mathematics, 29.07.2019 18:20, kortetsosie8813

The probability that a birth will result in twins is 0.0190. assuming independence (perhaps not a valid assumption), what is the probability that out of 120 births in a hospital, there will be exactly 3 sets of twins?

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