I need ASAP… like in just over an hour …. but it is only a few questions!!!
- When I was recently living in Germany, the cost of gasoline was about 1.60 euro per liter. The most I could pump to fill up the empty tank on my VW Golf was 50.00 euro worth of gas at a time, after which amount the gas pump would shut off. This 50.00 euro worth of gas would last for about 190 km. (A) Given that the currency exchange rate was $1.00 = 1.12 euro, what was the cost of gasoline in dollars per gallon? (B) What was my gas mileage (fuel efficiency) in miles per gallon? All work must be shown , labeled , and explained in detail to receive credit. Note that where applicable, superscripts (X 2 ) can be written as X^2 and subscripts (X 2 ) can be written as X_2 if it saves you time.
My dog weighs 58.0 lbs. I put him into a bathtub containing 47.0 gallons of water when filled to the very top. After I put him in, I collected all the water that ran over the side of the tub, and found it to be equal to 1.923 gallons. (A) What is the density of my dog in grams per cubic centimeter? (B) What if next time I do this he gains 4.0 lbs. and grows big enough to displace 2.10 gallons. Will he still have the same density? Explain and prove your answer. All work must be shown , labeled , and explained in detail to receive credit. Note that where applicable, superscripts (X 2 ) can be written as X^2 and subscripts (X 2 ) can be written as X_2 if it saves you time.
- Theoretically speaking, how many moles of lithium bromide can be produced if we react 9.1 moles of CaBr 2 and 5.7 moles of LiCl? Reaction: CaBr 2 + 2LiCl → 2LiBr + CaCl 2 . You must show all work clearly and in detail to receive credit. All numbers seen immediately following the elemental symbols are intended to be subscripts.
- I cook my pasta by putting a little salt in the boiling water. If my pasta water is a 2.90% NaCl solution by mass with a density of 1.21 g/mL, how many mL of my pasta water contains 2.00 g of sodium? You must show all work clearly and in detail to receive credit. All numbers seen immediately following the elemental symbols are intended to be subscripts.
Assume you take a sample of 13.4 g Al and oxidize it (in an excess stream of O 2 ) to produce 2.10 g of Al 2 O 3 . Calculate the percent yield of Al 2 O 3 . Reaction: 4 Al + 3 O 2 → 2 Al 2 O 3 . You must show all work to receive credit. All numbers immediately following elemental symbols are subscripts.Give the A) Element Symbol, B) Atomic Number, C) Number of Protons, D) Number of Neutrons, (E) Mass Number, and (F) total Number of Electrons for: Cesium–135 and Francium-228When I am driving around my Volkswagon I burn (C8H18), or octane in my engine, the yield of products (carbon dioxide and water) is 93%. (Hint: oxygen is required)1) Write out a balanced chemical equation showing the combustion of octane.2) If 31.0 g of octane is burned with 31.0 g of oxygen what is limiting, if anything?3) What is the mass of carbon dioxide produced (don’t forget about the yield) in this engine given 31.0 g of octane is burned with 31.0 g oxygen?