Calculate the mass in grams of NaOH required to make up a 1.57 M aqueous solution in a 25.0 mL volumetric flask.
The molar mass of NaOH is 40.0 g/mol.
Give your answer to three significant figures.

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

Which best describes why nh4+ can form an ionic bond with cl-?

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light