Calculate the millimoles of barium chlorate the chemist has added to the flask.

If you are given the concentration of the solution in the flask in terms of molarity, then you can easily determine the moles of barium chlorate in the flask by multiplying the volume of the solution to the molarity. Then, multiply the resulting value to 1000 to obtain millimoles of barium chlorate. However, if you are given the mass of the barium chlorate added. You use the molar mass of the compound which is 304.23 g/mol to determine the number of moles. You divide the mass with the molar mass of the compound. Then, you multiply it to 1000 to obtain millimoles.

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water