Answers created by Doug2100

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• How do you find the slope of #5x+2y=-20#?
  
• How do you find the roots, real and imaginary, of #y= -x^2 -x-6-(x- 3 )^2 # using the quadratic formula?
  
• What is the Intermolecular force of nh3? Thank you
  
• Shoudl the gravitational field strength (g) be smaller when you are at a higher altitude?
  
• If a #1 kg# object moving at #3 m/s# slows down to a halt after moving #8 m#, what is the friction coefficient of the surface that the object was moving over?
  
• What is the slope of the line passing through the following points: # (1,3) ; (1,-2)#?
  
• Prove that y=3x+2 has intersection with y=x-(1/x^2)+5 ?
  
• What's the protocol for making 200mL of 15% (w/v) aqueous solution? Thanks a bunch in advance!
  
• How do you write #3.6 times 10^-5# in standard form?
  
• How do I calculate the molarity and percentage of acetic acid in vinegar?
  
• Find the PH [H+] of 6.0x10^-2?
  
• If the sequence of bases on one side of DNA is ATCCGTC, than what is the sequence on the other side?
  
• How do you use Coulomb's law?
  
• 1 mole nitrogen gas and 3 moles hydrogen gas form .05 moles NH3 @ equilibrium. What is Kc of the reaction?
  
• How do you solve the system of equations by graphing and then classify the system as consistent or inconsistent #5x+6y+8=0# and #3x-2y+16=0 #?
  
• How do you write "the difference of 17 and 5 times a number" as an algebraic expression?
  
• A bag contains 21 red marbles, 22 green marbles, 24 orange marbles, and 10 yellow marbles. You choose a marble randomly from the bag What is the approximate probability that you will choose a green or yellow marble?
  
• How do you solve #-13\geq n - 4#?
  
• A charge of #-5 C# is at #(1, 3 )# and a charge of #1 C# is at #(8,4 ) #. If both coordinates are in meters, what is the force between the charges?
  
• 0.1 mole of N2O4(g) was sealed in a tube under atmospheric conditions at 25° C. Calculate the number of moles of NO2(g) present, if the equilibrium #N_2O_4(g) rightleftharpoons 2NO_2(g)# (Kp = 0.14) is reached after some time ?
  
• How many fluid ounces are equivalent to one cup?
  
• Why is it important to make sure all the NaHCO3 has reacted with the HCl before you stop adding acid ?
  
• If you make water particles absolutely still will they become a solid? and would their temperature change? Thank you!
  
• What is # 85 * 1,000#?
  
• If the ring is initially at 99 degrees Celsius, what mass of water at 25 degrees Celsius is needed to lower the ring’s temperature to 38 degrees Celsius?
  
• Suppose you have a gas in a container being pressed down by a piston. The initial volume of the gas is 5.0 m3 and the pressure is 7.5 mmHg. If the volume decreases to 4.0 m3, what is the pressure? (The product of the volume and pressure remains constant.)
  
• The equilibrium constant Kc for the reaction is 3.8 10-5 at 727°C. What are Kc and Kp for the following equilibrium at the same temperature?
  
• The valve cap n a bicycle wheel is 12.5 in from the center of the wheel. From the position shown, the wheel starts to roll. After the wheel has turned 390°, how far above the ground is the valve cap? Assume that the outer radius of the tire is 13.375 in.
  
• What are the moles of substances present at equilibrium at #450^oC# if 1 mol #N_2# and 4 mol #H_2# in a 10 L vessel react according to the following equation? #N_2(g)# + #3H_2(g)# #rightleftharpoons# #2NH_3(g)#