The following volumes of stock reagents were combined in a test tube (they were measured with a buret). What is the concentration (in M) of Bleach in the tube at the moment they are combined? Reagent Stock Solution Conc. (M) Volume Added (mL)
Allura Red 1.0 X 10-4 4.49
Distilled Water 21.10
Bleach 5.0 X 103 2.75

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

Write the overall equation for the reaction for lithium battery

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)