A 20.0 mL sample of a Cu2+ solution was diluted to 250.0 mL. A portion of this solution was found to have an absorbance of 0.15
under the same conditions that were used to generate the given
absorbance vs. [Cu2+1 graph. What was the concentration of Cu2+ ions
in the original sample?

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the molecular weight of copper