Which of these experiments tests a chemical property of an element? Which of these experiments tests a chemical property of an element? A Placing the element sample in salt water to see if it rusts.
B Trying to lift the element sample with a magnet.
C Heating the element sample to determine its melting point.
D Placing the element sample in water to see if it dissolves.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.