Answers edited by Nathan L.

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• Question #0996a
  
• How would you identify the missing coefficient in the balanced equation and classify the type of reaction?
  
• 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?
  
• Question #9d0d1
  
• 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?
  
• 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?
  
• 7% of what number is 42?
  
• Question #7908b
  
• How can you determine if the molecular formula a compound is the same as its of empirical formula?
  
• 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`?
  
• Question #d8d98
  
• 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?
  
• What type of compound forms hydrogen ions in solution?
  
• Question #e2d82
  
• 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 #10a38
  
• How many moles of carbon dioxide is formed when 4.0 moles of carbonic acid decomposes (water is the other product)?
  
• Question #17787
  
• Question #e0ae8
  
• How do you find `lim 1+1/x` as `x->0^-`?
  
• Question #25bd1
  
• 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?
  
• Question #a2b19
  
• 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 #a292a
  
• Question #c7491
  
• Question #10023
  
• 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 28 g of `C_3H_8` and 45 g of `O_2` are reacted together, which one would be the limiting reactant?
  
• Question #7ea96
  
• 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?
  
• How many moles of hydrogen are in a `3.2*mol` quantity of `"ammonium hydroxide"`?
  
• The pH of a solution is 7.0. What is the pOH?
  
• How do you find the equation of a line tangent to the function `y=x^3-2x^2+2` at (2,2)?
  
• 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 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?
  
• 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.
  
• 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 #1ef73
  
• Question #67d87
  
• What is the conjugate base of `HNO_2`?
  
• 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 many oxygen atoms are there in one formula unit of copper(ll) phosphate?
  
• Question #c0cbd
  
• How do you solve `2x - 38= 81- 5x`?
  
• Question #f4d64
  
• Limiting Reagent Question?
  
• Question #00a80
  
• 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 moving at `22 m/s` at `t=0` and accelerates at a rate of `a(t) =t-2` on `t in [0,2]`?
  
• 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?
  
• 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]`?
  
• 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]`?
  
• Question #87c07
  
• What is an idea or explanation that leads to scientific investigation called?
  
• Question #f33b1
  
• 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?
  
• 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.
  
• 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 #a9717
  
• The element Ga has how many valence electrons?
  
• Question #9c52c
  
• Question #f9a45
  
• Question #55d02
  
• Which species undergoes a loss of electrons in this equation: `Mg(s) + 2Ag^+(aq) -> Mg^(2+)(aq) + 2Ag(s)`?
  
• Why is the aqueous solution of aluminium chloride acidic?
  
• Question #cd938
  
• 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?
  
• What is an acronym or pnemonic to remember the strong bases?
  
• 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 #70cfb
  
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