What is the molarity of a solution in which 26.0 grams of BaCl2 (molar mass = 208.2 g/mol) are dissolved in enough water to make 450.0 mL of solution?
Which element has the following electron configuration?
Calculate the pH of beer in which the hydrogen ion concentration is 6.3 - 10-5 M
Which of the following is a physical change?
water heated into steam
apples turning brown when exposed to air
milk turning sour
bleach removing color from fabric
Which of the following scientists developed the nuclear model of the atom?
J. J. Thomson
1) 0.278 M
moles = mass / molar mass
= 26 g / 208.2 g/mol
= 0.12488 moles
This solution provides the answer to each question along with a brief calculation and/or explanation for this answer.