Answers edited by Nathan L.

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• 7% of what number is 42?
  
• A particle is projected from the origin #(0,0)# in the #xy# plane at angle of #37^o# with the x axis with a speed of #10# #ms^-1#, its acceleration being #(-5 hati + 10 hatj)# #ms^-2#. What is the speed of the particle when the x-coordinate is again zero?
  
• Question #c7491
  
• Question #f33b1
  
• A 100 N force is applied to a plow by the horse pulling the plow. How much work does it take for the horse to pull the plow 100 meters in 5 minutes?
  
• Question #e2d82
  
• Question #70cfb
  
• How do you find the equation of a line tangent to the function #y=x^3-2x^2+2# at (2,2)?
  
• Why is the aqueous solution of aluminium chloride acidic?
  
• How many moles of hydrogen are in a #3.2*mol# quantity of #"ammonium hydroxide"#?
  
• A certain amount of rubidium iodide was dissolved in #"4.6 L"#. A #"1-L"# aliquot was extracted an diluted to #"13.9 L"# to form a #"0.65 M"# solution in water. What mass of rubidium iodide was dissolved into the original solution?
  
• Mike's car can accelerate from 0 mph to 40 mph in 5 seconds. What is the acceleration of his car in miles per hour per second?
  
• Question #cd938
  
• How do you find #lim 1+1/x# as #x->0^-#?
  
• Question #10023
  
• how much of each substance will be present at the end of the reaction? If 1.22g of the solid formed, what is the percent yield of this reaction?
  
• Objects A and B are at the origin. If object A moves to #(-2 ,2 )# and object B moves to #(7 ,-5 )# over #3 s#, what is the relative velocity of object B from the perspective of object A? Assume that all units are denominated in meters.
  
• How many moles of carbon dioxide is formed when 4.0 moles of carbonic acid decomposes (water is the other product)?
  
• Question #d8d98
  
• Question #a292a
  
• Question #25bd1
  
• The gas inside of a container exerts #9 Pa# of pressure and is at a temperature of #35 ^o K#. If the temperature of the gas changes to #20 ^oK# with no change in the container's volume, what is the new pressure of the gas?
  
• The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
  
• The pH of a solution is 7.0. What is the pOH?
  
• What is the average speed of an object that is moving at #4 m/s# at #t=0# and accelerates at a rate of #a(t) =2-t# on #t in [0,3]#?
  
• An object is at rest at #(1 ,2 ,8 )# and constantly accelerates at a rate of #1 m/s^2# as it moves to point B. If point B is at #(3 ,7 ,4 )#, how long will it take for the object to reach point B? Assume that all coordinates are in meters.
  
• If #16 L# of a gas at room temperature exerts a pressure of #5 kPa# on its container, what pressure will the gas exert if the container's volume changes to #2 L#?
  
• If 28 g of #C_3H_8# and 45 g of #O_2# are reacted together, which one would be the limiting reactant?
  
• What is the average speed, on #t in [0,5]#, of an object that is moving at #7 m/s# at #t=0# and accelerates at a rate of #a(t) =2t^2+2# on #t in [0,2]#?
  
• How can you determine if the molecular formula a compound is the same as its of empirical formula?
  
• What is the force, in terms of Coulomb's constant, between two electrical charges of #6 C# and #-6 C# that are #12 m # apart?
  
• Question #87c07
  
• Which species undergoes a loss of electrons in this equation: #Mg(s) + 2Ag^+(aq) -> Mg^(2+)(aq) + 2Ag(s)#?
  
• What is the average speed of an object that is still at #t=0# and accelerates at a rate of #a(t) =2t^2-2t-2# from #t in [2, 3]#?
  
• Question #f4d64
  
• Question #a9717
  
• If a projectile is shot at a velocity of #23 m/s# and an angle of #pi/12#, how far will the projectile travel before landing?
  
• Question #0996a
  
• Question #9d0d1
  
• Question #c0cbd
  
• What type of compound forms hydrogen ions in solution?
  
• Calculate the molar mass in #"g"/"mol"#of diacetyl (butanedione) given that in the gas phase #100# degrees Celsius and #747# torr, a #0.3060# g sample of diacetyl occupies a volume of #0.111L#?
  
• A projectile is shot from the ground at a velocity of #4 m/s# and at an angle of #(5pi)/6#. How long will it take for the projectile to land?
  
• Question #a2b19
  
• What is an acronym or pnemonic to remember the strong bases?
  
• A charge of #-2 C# is at #(-5 , 1 )# and a charge of #-3 C# is at #(0 ,4) #. If both coordinates are in meters, what is the force between the charges?
  
• Question #67d87
  
• Question #7ea96
  
• What is the conjugate base of #HNO_2#?
  
• The table below shows the specific heats of several metals. The temperature of a 15-g sample of an unknown metal increases from 20.0 C to 30.0 C when it absorbs 67.5 J of heat. Which of the metals in the table below could be the unknown metal?
  
• What is the average speed of an object that is still at #t=0# and accelerates at a rate of #a(t) = 5t+1# from #t in [0, 6]#?
  
• Question #f9a45
  
• Question #9c52c
  
• What is an idea or explanation that leads to scientific investigation called?
  
• Question #e0ae8
  
• An object is at rest at #(1 ,2 ,9 )# and constantly accelerates at a rate of #1 m/s^2# as it moves to point B. If point B is at #(3 ,1 ,4 )#, how long will it take for the object to reach point B? Assume that all coordinates are in meters.
  
• The air in the inner tube of the tire of a racing bike has a pressure of 115 psi. How do you convert this pressure to atm?
  
• Question #7908b
  
• Question #17787
  
• Limiting Reagent Question?
  
• How would you identify the missing coefficient in the balanced equation and classify the type of reaction?
  
• Question #1ef73
  
• Question #55d02
  
• Question #00a80
  
• Question #10a38
  
• A particle moves along X direction with constant acceleration. it velocity after 4s is 18 m/s and displacement is 56m find out its initial velocity and acceleration?
  
• What is the average speed of an object that is moving at #22 m/s# at #t=0# and accelerates at a rate of #a(t) =t-2# on #t in [0,2]#?
  
• The element Ga has how many valence electrons?
  
• How many oxygen atoms are there in one formula unit of copper(ll) phosphate?
  
• At sea level, the atmosphere exerts a pressure of 450 pounds on a surface with an area of 30 square inches. How much pressure per square inch does the atmosphere exert on surfaces at sea level?
  
• How do you solve #2x - 38= 81- 5x#?
  
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