Questions asked by Josiah S.

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• How many grams of hydrogen gas are needed to react with 5 moles of oxygen gas?
  
• How many moles of hydrogen are needed to produce 25.13 g of water?
  
• What is the number of oxygen molecules needed to produce 3.232 g of water?
  
• Write the general chemical equation for this equation ?
  
• If 4.36 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction?
  
• Write the balanced molecular equation for the neutralization reaction between H2SO4 and KOH in aqueous solution?
  
• Write the net ionic equation including the phases?
  
• What is percent yield of this reaction?
  
• Find the linear equation?
  
• #3x^2 - y^2 = 3; color(white)("ddd")(x-1)^2 + y^2 = 4# ?
  
• How much would it cost in US dollars to buy 1 gallon of gas in France?
  
• A penny has a thickness of approximately 1.0 mm. if you stacked Avogadro's number of pennies one on top of the other on Earth's surface, how far would the stack extend in km?
  
• A drop of water has a volume of approximately 0.05 mL. How many water molecules does it contain? The density of water is 1.0g/mL.
  
• Here is the chemical reaction - Ca(NO3)2 + (NH4)3PO4 --> Double displacement follows... If you start with 10.25 mL of .553M Ca(NO3)2 soln, how many moles of calcium nitrate do you have in the soln? Also a part 2 in the question.
  
• Here is the chemical reaction - Ca(NO3)2 + (NH4)3PO4 --> Double displacement follows... If you start with 10.25 mL of .553M Ca(NO3)2 soln, how many moles of calcium nitrate do you have in the soln? Also a part 2 in the question.
  
• Sierra walks 26 cubits due south, then 70 cubits due east and finally 50 cubits due north. How far is Sierra from her starting point?
  
• The point P is on the unit circle. If the y-coordinate of P is -4/5 and P is in quadrant III , then x = ?
  
• If a an arc of length 5.5 yards subtends a central angle of 0.5 radians on a circle, then the radius of the circle has length: How many yards?
  
• In a circle of radius 13 m, the length of the arc subtended by a central angle of 15° is approximately?
  
• A sector of area 21 square miles is formed by a central angle of 3.1 radians. Find the radius of the circle?
  
• A sector of area 17 square feet is formed by a central angle of 154.6986 ∘ 154.6986∘. Find the radius of the circle?
  
• A space shuttle 340 miles above the earth is orbiting the earth once every 11 hours. How far does the shuttle travel in 3 hours? (Assume the radius of the earth is 4,000 miles.)
  
• If A is an angle in QIV such that sin A = − 3 5 and B is an angle in QIV such that sin B = − 1 3 use identities to find COS A COS B TAN(A+B) TAN(A-B) ?
  
• Prove the following identity?
  
• Prove the following identity?