A pure gold coin contains 0.173 mol of gold(Au). What is its mass in grams? Note that molar mass of gold is 196.97 g/mol.

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?