If h is written in scientific notation but its coefficient is not 1, what do you need to calculate ph

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays