Which of these observations would be classified as a physical property a: lemon juice cleans a penny b: a candle burns brightly c: baking soda in vinegar forms bubbles d: a cube of gold is hammered into a thin sheet

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a. soft fossils b. mold fossils c. index fossils d. trace fossils

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices

Aman applies a force of 500n to push a truck 100m down the street how much does he do?