A sample of barium hydroxide, Ba(OH)2, is known to have become contaminated with barium carbonate, BaCO3, by reaction with CO, in the air. A 2.00 g sample is titrated with 0.450M HCI
and it is found that 55.56 mL of HCl are required for neutralization. Calculate the percentage by
mass of BaCO3 in the sample.

Write a paragraph at least 10 sentences explaining how rocks are used today in society

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.