To make a secure fit, rivets that are larger than the rivet hole are often used and the rivet is cooled (usually in dry ice) before it is placed in the hole. A steel rivet 1.875 cm cm in diameter is to be placed in a hole 1.873 cm cm in diameter in a metal at 23 ∘ C ∘C .

Atank contains 240 liters of fluid in which 10 grams of salt is dissolved. brine containing 1 gram of salt per liter is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate. find the number a(t) of grams of salt in the tank at time t.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure