What is the molarity of a solution prepared by dissolving 25.0 grams of NaOH in sufficient water to make a solution with a total volume of 2.40 liters?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %