Question

1) How much is the value of a gold Cube of 1.00 inch edge length? The density of gold is 19.3 g/ml. The price of gold is currently $1550 per ounce 2) A hot tub Contains 450 gal of water at 68°F. The heating element has 5.0 kW power (ic. it delivers 5 kJ heat energy per second). How many hours does it take to heat the hottub to lort? 3) The querage density of the Universe is calculated to be 6. 10 27 kg/m? How many atoms do you find in a m' of Universe on querage? Assume that all atoms in the Universe are hydrogen (95% are actually hydrogen). 4) Ammonium per Chlorate was used as the sold oxidizer in the space Shuttle's Solid rocket boosters. The salt reacts A with aluminum oxide, water vapor, ndrogen gas and hydrogen Chloride gas. Write the balanced reaction equation 5) lf 23 of Cu Hio were Combusted with 37 of oxygen, One reagent is limiting? How much of the non- limiting reagent will be left over after the reaction is Completed?

Answer 1

RANKA volume dy gold cube za a = length of Edge = sinch linch = 2.54cm a = 2.54 um = 16.38 cm3 Volume = Q. 54 cm)} [lem3= ime : Volume = 16.38 m2 despity = 19.3 Ilme density Iman - volume x = 16.38 mtx 19. 3 9 = 316.27 a -0.0353 ounce : 316.27 9 = 316.27 0.0353 mass = 11.16 ounce $ 1550 pe oune Ust of gold = ?. Tutal cost = $1550x11.16 = $ 17304.73 ounce.