WyzAnt Answershttps://www.wyzant.com/resources/answers/questions?f=activeAsk questions and get free answers from professional tutorsMon, 30 Nov 2015 03:49:30 -0600https://www.wyzant.com/images/wyzant-logo-type-white.pngWyzAnt Answershttps://www.wyzant.com/resources/answers/questions?f=activehttps://www.wyzant.com/resources/answers/questions?f=active370602https://www.wyzant.com/resources/answers/132089/how_would_joseph_mccarthy_fit_into_society_todayGabriel from Hereford, TXhttps://www.wyzant.com/resources/answers/users/view/85907769US Historyhow would Joseph McCarthy fit into society today?<div>I am asking how U.S Senator Joseph McCarthy would fit into society now.</div>Thu, 06 Aug 2015 23:49:17 -05002015-08-06T23:49:17-05:00405709https://www.wyzant.com/resources/answers/165713/cos2pi_tanpi_2Kevin from Los Angeles, CAhttps://www.wyzant.com/resources/answers/users/view/86046997MathMath HelpAdvanced Functionscos2pi=tanpi^2<div>find the solution</div>Sun, 29 Nov 2015 16:40:41 -06002015-11-29T16:40:41-06:00405862https://www.wyzant.com/resources/answers/165855/thermodynamicsAna from Glendale, CAhttps://www.wyzant.com/resources/answers/users/view/86101344ThermodynamicsThermodynamics <div>Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into metal from 99.90% to 99.99% purity by the Mond process. The primary reaction involved in the Mond process is Ni(s) + 4CO(g) â‡Œ Ni(CO)4(g) <br />a. Without referring to Appendix 4, predict the sign of Î”So for the preceding reaction. Explain. <br />b. The spontaneity of the preceding reaction is temperature dependent. Predict the sign of Î”Ssurr for this reaction. Explain. <br />c. For Ni(CO)4(g), Î”Hof = â€“607 kJ/ mol and So = 417 JK-1mol-1 at 298 K. Using these values and data in Appendix 4, calculate Î”Ho and Î”So for the preceding reaction. <br />d. Calculate the temperature at which DGo = 0 (K = 1) for the preceding reaction, assuming that Î”Ho and Î”So do not depend on temperature. <br />e. The first step of the Mond process involves equilibrating impure nickel with CO(g) and Ni(CO)4(g) at about 50oC. The purpose of this step is to convert as much nickel as possible into the gas phase. Calculate the equilibrium constant for the preceding reaction at 50oC. <br />f. In the second step of the Mond process, the gaseous Ni(CO)4 is isolated and heated at 227oC. The purpose of this step is to deposit as much nickel as possible as pure solid (the reverse of the preceding reaction). Calculate the equilibrium constant for the preceding reaction at 227oC. <br />g. Why is temperature increased for the second step of the Mond process? <br />h. The Mond process relies on the volatility of Ni(CO)4 for its success. Only pressures and temperatures at which Ni(CO)4 is a gas are useful. A recently developed variation of the Mond process carries out the first step at higher pressures and a temperature of 152oC. Estimate the maximum pressure of Ni(CO)4(g) that can be attained before the gas will liquefy at 152oC. The boiling point for Ni(CO)4 is 42oC, and the enthalpy of vaporization is 29.0 kJ/mol. [Hint: The phase- change reaction and the corresponding equilibrium expression are Ni(CO)4(l) â‡Œ Ni(CO) 4(g) K = PNi(CO)4 Ni(CO)4(g) will liquefy when the pressure of Ni(CO)4 is greater than the K value.]</div>Mon, 30 Nov 2015 03:15:00 -06002015-11-30T03:15:00-06:00405863https://www.wyzant.com/resources/answers/165857/help_please_in_this_oneJenna from Lacona, NYhttps://www.wyzant.com/resources/answers/users/view/86120135EquationHelp please in this one.<div>Consider the general questions (-1)^n , where n is a natural number(1,2,3…). What will it evaluate to, for a given value of n?</div>Mon, 30 Nov 2015 03:24:52 -06002015-11-30T03:24:52-06:00405802https://www.wyzant.com/resources/answers/165805/the_square_root_of_the_product_of_3_and_a_number_is_equal_to_6_less_than_the_numberGabrelle from Cullman, ALhttps://www.wyzant.com/resources/answers/users/view/86122136Word Problem Helpthe square root of the product of 3 and a number is equal to 6 less than the number<div>I cant figure out this word problem or how to set it up please help me out.</div>Sun, 29 Nov 2015 20:41:40 -06002015-11-29T20:41:40-06:00405857https://www.wyzant.com/resources/answers/165851/is_3_between_2_and_2Sara from Reno, NVhttps://www.wyzant.com/resources/answers/users/view/86060780Prealgebrais -3 between -2 and 2?<div>is -3 between -2 and 2?</div>Mon, 30 Nov 2015 01:22:23 -06002015-11-30T01:22:23-06:00405856https://www.wyzant.com/resources/answers/165849/find_an_ordered_pair_x_y_that_is_a_solution_to_7x_3y_8Sara from Reno, NVhttps://www.wyzant.com/resources/answers/users/view/86060780AlgebraFind an ordered pair(x,y) that is a solution to 7x-3y=8.<div>Find an ordered pair(x,y) that is a solution to 7x-3y=8.</div>Mon, 30 Nov 2015 01:17:56 -06002015-11-30T01:17:56-06:00405845https://www.wyzant.com/resources/answers/165839/please_help_me_with_these_identity_proofsOlivia from Oneonta, NYhttps://www.wyzant.com/resources/answers/users/view/86122331Trigonometry IdentitiesPre Calculus Trigonometry IndentitiesTrigonometryPrecalculusPre-CalculusPre CalculusPlease help me with these identity proofs!!<div>1) (cscx + cotx) / (tanx + sinx) = cotxcscx</div>
<div> </div>
<div>2) (1/secx) -secx = -sinx</div>
<div> </div>
<div>3) (1-tan^2x / 1-cot^2x) = -tan^2x</div>Sun, 29 Nov 2015 23:41:23 -06002015-11-29T23:41:23-06:00405850https://www.wyzant.com/resources/answers/165843/a_scientist_has_two_solutions_solution_a_contains_60_salt_and_solution_b_is_90_salt_she_wants_to_obtainCarina from Reno, NVhttps://www.wyzant.com/resources/answers/users/view/85440211Pre-Algebraa scientist has two solutions: Solution A contains 60%salt and solution B is 90% salt. she wants to obtain<div>a scientist has two solutions: Solution A contains 60%salt and solution B is 90% salt. she wants to obtain 120 onces of a mixture that is 80% salt. How many ounces of each solution should she use?</div>Mon, 30 Nov 2015 00:38:31 -06002015-11-30T00:38:31-06:00405851https://www.wyzant.com/resources/answers/165845/a_rectangular_lot_has_length_2x_2_10_feet_and_width_of_x_2_2x_2_feetCarina from Reno, NVhttps://www.wyzant.com/resources/answers/users/view/85440211Pre-AlgebraA rectangular lot has length (2x^2+10) feet and width of (x^2+2x+2) feet.<div>A rectangular lot has length (2x^2+10) feet and width of (x^2+2x+2) feet. what is its perimeter?</div>Mon, 30 Nov 2015 00:41:39 -06002015-11-30T00:41:39-06:00405852https://www.wyzant.com/resources/answers/165847/maria_walks_x_yards_in_15_minutes_if_she_continues_to_walk_at_the_same_rate_how_many_more_yards_doesCarina from Reno, NVhttps://www.wyzant.com/resources/answers/users/view/85440211PrealgebraMaria walks x yards in 15 minutes. if she continues to walk at the same rate, how many more yards does<div>Maria walks x yards in 15 minutes. if she continues to walk at the same rate, how many more yards does she walk in the next 7 minutes.</div>Mon, 30 Nov 2015 00:43:43 -06002015-11-30T00:43:43-06:00405848https://www.wyzant.com/resources/answers/165841/jose_correctly_answered_80_of_the_questions_on_a_language_arts_quiz_if_he_answered_16_questions_correctly_how_many_questions_were_on_the_language_arts_quizMileidis from Hialeah, FLhttps://www.wyzant.com/resources/answers/users/view/86122356Math ProblemJose correctly answered 80% of the questions on a language arts quiz. If he answered 16 questions correctly , how many questions were on the language arts quiz?<div>Find how many questions were on the quiz</div>Mon, 30 Nov 2015 00:03:43 -06002015-11-30T00:03:43-06:00405595https://www.wyzant.com/resources/answers/165635/i_have_a_8x10_picture_frame_and_want_to_fit_60_pictures_in_it_how_big_do_the_pictures_need_to_beKailah from Madisonville, KYhttps://www.wyzant.com/resources/answers/users/view/86121462Word ProblemsAreaI have a 8x10 picture frame and want to fit 60 pictures in it. How big do the pictures need to be?<div>Im in need of help for a Christmas present. I want to do a collage of pictures but I don't know how small the pictures need to be in order to fit all 60. if it won't work, I can always group pictures together in a collage on my phone and print it as one. </div>Sun, 29 Nov 2015 12:56:18 -06002015-11-29T12:56:18-06:00405832https://www.wyzant.com/resources/answers/165829/what_is_the_relationship_among_proportional_relationships_lines_rate_of_change_and_slopeMelanie from Bronx, NYhttps://www.wyzant.com/resources/answers/users/view/86122267MathWhat is the relationship among proportional relationships,lines,rate of change,and slope?<div>Its a essential question </div>Sun, 29 Nov 2015 22:18:12 -06002015-11-29T22:18:12-06:00405794https://www.wyzant.com/resources/answers/165801/probabilityChris from Sheridan, INhttps://www.wyzant.com/resources/answers/users/view/85991719ProbablityMathProbability<div>4 fair coins are simultaneously flipped and 1 fair 4-sided die (with numbers 1-4 on the faces) is tossed. What is the probability that the number of heads is equal to the number that comes up on the die? Show all steps to answer for credit.</div>Sun, 29 Nov 2015 20:20:36 -06002015-11-29T20:20:36-06:00405836https://www.wyzant.com/resources/answers/165831/a_committee_of_4_people_is_chosen_from_9_women_and_9_men_how_many_different_committees_are_possible_that_consist_of_2_women_and_2_menSArah from Sloatsburg, NYhttps://www.wyzant.com/resources/answers/users/view/86122281ProbablitityA committee of 4 people is chosen from 9 women and 9 men. How many different committees are possible that consist of 2 women and 2 men?<div>A committee of 4 people is chosen from 9 women and 9 men. How many different committees are possible that consist of 2 women and 2 men?</div>Sun, 29 Nov 2015 22:31:00 -06002015-11-29T22:31:00-06:00405841https://www.wyzant.com/resources/answers/165835/all_real_numbers_at_most_7_units_from_0Asem from San Leandro, CAhttps://www.wyzant.com/resources/answers/users/view/86122294Algebra Word Problemall real numbers at most 7 units from 0<div>its an absolute value inequality that represents each set of numbers.</div>Sun, 29 Nov 2015 22:48:53 -06002015-11-29T22:48:53-06:00405796https://www.wyzant.com/resources/answers/165803/a_ferris_wheel_rotates_counter_clockwise_has_a_radius_of_20m_and_rotates_2_5rev_min_the_bottom_of_the_wheel_is_12m_above_the_groundKevin from Los Angeles, CAhttps://www.wyzant.com/resources/answers/users/view/86046997MathMath Word ProblemAdvanced FunctionsMath Helpa ferris wheel rotates counter-clockwise has a radius of 20m and rotates 2.5rev/min. the bottom of the wheel is 12m above the ground<div>Assume you get on the bottom. After the ride starts, how long will it take for your seat to reach the highest point on the wheel?</div>Sun, 29 Nov 2015 20:29:26 -06002015-11-29T20:29:26-06:00405603https://www.wyzant.com/resources/answers/165637/i_need_tio_write_an_equation_in_slope_intercept_form_for_a_line_parallel_to_the_line_y_4x_3_that_passes_through_the_point_2_1Cynthia from Aurora, COhttps://www.wyzant.com/resources/answers/users/view/4324199Slope-intercept EquationI need tio write an equation in slope-intercept form for a line parallel to the line y = 4x +3 that passes through the point (2,1)<div>solution for y = 4x +3 that passes through the point (2,1).</div>Sun, 29 Nov 2015 13:10:07 -06002015-11-29T13:10:07-06:00405614https://www.wyzant.com/resources/answers/165645/without_actually_solving_the_problem_choose_the_correct_solution_by_deciding_which_choice_satisfies_the_given_conditionsCurtis from Los Angeles, CAhttps://www.wyzant.com/resources/answers/users/view/86121504Algebra Word ProblemSystem Of Linear EquationsWithout actually solving the problem, choose the correct solution by deciding which choice satisfies the given conditions.<div>Keisha has a total of 80 coins, all of which are either dimes or quarters. The total value of the coins is $11.00. Find the number of each type of coin.</div>Sun, 29 Nov 2015 13:22:25 -06002015-11-29T13:22:25-06:00