Answers created by Peter M.

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• When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction #"SO"_2 + 2"H"_2"S" -> 2"H"_2"O" + 3"S"# occurs. Here hydrogen sulphide is acting as?
  
• What is the angular momentum of a rod with a mass of #2 kg# and length of #9 m# that is spinning around its center at #12 Hz#?
  
• The sum of two numbers is 72, and twice their difference is 24. What is the smaller of the two numbers?
  
• Which type of bond is formed when Ammonia and hydrogen ion bond together to form ammonium ion?
  
• What is the amount (in moles) of copper (II) sulfate pentahydrate that you will need to make 100mL of a 0.500 mol/L solution, with all the calculations?
  
• A truck pulls boxes up an incline plane. The truck can exert a maximum force of #2,400 N#. If the plane's incline is #(2 pi )/3 # and the coefficient of friction is #5/3 #, what is the maximum mass that can be pulled up at one time?
  
• Why is there are huge energy change between the 9th and the 10th electron in the sodium atom?
  
• Why is enthalpy an extensive property?
  
• Use the enthalpy of combustion of propene CH2= CHCH3(g), #Delta#HCo =-2058 kJ mol-1, and the fact that #Delta#Hfo[H2O(l)] = -285.83 kJ mol-1, and #Delta#Hfo[CO2(g)] -393.51 kJ mol-1, to find its enthalpy of formation?
  
• A vehicle travelling with a uniform velocity was given a uniform acceleration, and in the sixth and tenth seconds after the acceleration began it was observed to travel 15 m and 23 m respectively. What is the acceleration and the initial uniform velocity?
  
• Question #a286d
  
• Question #68ada
  
• Organic Chemistry Help Please? D:
  
• How do you sketch the graph of #y=-4(x-3)^2+2# and describe the transformation?
  
• How do you graph #y<=3absx-1#?
  
• How to do this question in regards of matrices and transformation?
  
• Create a formula/equation to calculate the x-value for the vertex of any parabola?
  
• Question #a0eaf
  
• Why do polyprotic acids become less acidic as they lose protons?
  
• Question #cc09c
  
• Marina bought 2.6 pounds of salmon at the fish market. The total cost was $38.87. What was the price of the salmon per pound?
  
• How do you solve #8( 1+ 7n ) = 8( - 2+ 6n )#?
  
• In how many ways can 7 people be seated in a row o chairs if Jane and Joe must sit next to each other?
  
• Question #4a756
  
• Question #74ccc
  
• Cups A and B are cone shaped and have heights of #32 cm# and #24 cm# and openings with radii of #15 cm# and #8 cm#, respectively. If cup B is full and its contents are poured into cup A, will cup A overflow? If not how high will cup A be filled?
  
• Question #c4b94
  
• Question #2764f
  
• Given #f(x) = 17-x^2#, what is the average rate of change in #f(x)# over the interval #[1,5]#?
  
• How do you solve #25^ { 1- 3n } = 625^ { - n - 1}#?
  
• Question #21560
  
• Question #c28d1
  
• How to simplify #((3x^-1)/(9y^2))^-2# and have the answer in positive exponential notation?
  
• How do you solve for #V# in #B= (3V)/h?#
  
• Kate is paid $84 a week, It takes Kate two and a half hours each day to complete her paper run. How do you calculate Kate's hourly pay rate per week?
  
• How do you simplify #\frac { \frac { 6q ^ { 5} } { 5r ^ { 4} s ^ { 4} } } { \frac { 3p q ^ { 2} } { 20r ^ { 2} s } }#?
  
• Question #28428
  
• Question #9b04c
  
• How do you write the equation of the line that passes through #(-3, 3)# and #(2,-7)#?
  
• How do you simplify #cos^-1(sqrt2/2)#?
  
• Question #3a307
  
• Question #dea46
  
• Question #fb2b9
  
• How many moles of H2O could be obtained by reacting 0.75 mole of H2O2 in the reaction H2O2+H2S→2H2O+S?
  
• Question #02816
  
• How do you find the coordinates of the vertices, foci, and the equation of the asymptotes for the hyperbola #y^2=36+4x^2#?
  
• Question #35611
  
• Question #b7de9
  
• How do you divide #( i-5) / (2i+12)# in trigonometric form?
  
• Question #83550
  
• Question #d5343
  
• How do you find #(h-g)(n)# given #h(n)=4n+5# and #g(n)=3n+4#?
  
• Question #39687
  
• What is the equation of the tangent line of #f(x)=(2x^3 - 1) / (x^2-2x) # at #x=3#?
  
• What is the domain and range of # y=2e^(-x)#?
  
• Question #1724c
  
• Question #2d4b3
  
• Question #9ce73
  
• How do you evaluate #a^ { 5} \times ? = a ^ { 9}#?
  
• How many milliliters of 0.306 M HCl are needed to react with 51.0 g of CaCO3?
  
• Question #35427
  
• Calculate the value of #p# in #log49^2=plog7# ?
  
• Physics Question: A 2.0 kg block is launched up a frictionless ramp?
  
• Question #b9ee2
  
• Question #01808
  
• Question #50bb0
  
• Question #0bc37
  
• Question #3bdb8
  
• At 9:00 on Saturday morning, two bicyclists heading in opposite directions pass each other on a bicycle path.The bicyclist heading north is riding 6 km/hour faster than the bicyclist heading south. At 10:15, they are 42.5 km apart. What are their rates?
  
• The count in a bacteria culture was 700 after 20 minutes and 1000 after 40 minutes. What was the initial size of the culture?
  
• Question #3c7cf
  
• #Q(t) = Q_(o)e^(-kt)# may be used to model radioactive decay. #Q# represents the quantity remaining after years; #k# is the decay constant, 0.00011. How long, in years, will it take for a quantity of plutonium-240 to decay to 25% of its original amount?
  
• How do you solve #(x - 5) / (x - 8) = (x + 1) / (x - 5)#?
  
• A chemist mixes a 10% saline solution with a 20% saline solution to make 500 milliliters of a 16% saline solution. How many milliliters of each solution does the chemist mix together?
  
• How do you integrate #(5x-3)/((x-2)(x-3)^2)# using partial fractions?
  
• If there are #2.50xx10^18# lead atoms, what is the mass of this quantity?
  
• Given the reaction at equilibrium: #N_2(g) + O_2(g) + e n ergy rightleftharpoons 2NO(g)# What change will result in a decrease in the amount of #NO(g)# formed?
  
• Question #2ab12
  
• How do you solve #3/(x-2) = 1/(x-1) + 7/(x^2-3x+2)#?
  
• How to work out the density?
  
• Question #0bf56
  
• A salesperson is paid $110 per week plus 15% commission on her weekly sales of x dollars. How do you find a linear function that represents her total weekly pay w in terms of x?
  
• Question #715a8
  
• If light has a wavelength of 468 nm, what is the energy of this light expressed with units of kJ/mol?
  
• How solve it?
  
• Question #77db3
  
• Question #62891
  
• How do you find the amplitude and period of #y=4cos(72pit)#?
  
• How many moles of #Na^+# ions are present in 275.0 mL of 0.35 M #Na_3PO_4# solution?
  
• Question #37594
  
• Question #e2eed
  
• Question #16386
  
• Question #6b532
  
• How do you find the limit of #(x-cosx)/x# as x approaches #oo#?
  
• Question #51b13
  
• Question #13f28
  
• An exothermic reaction releases 86.5 kJ. How many kilocalories of energy are released?
  
• Anyone good at chemistry? please try this question for me.
  
• Question #146da