Calculate the density of the Zinc block in g/ml.
Mass of the
Zinc block is 37.56g
Volume of
water before
adding the
block is 25 ml
Volume of
water after
adding the
block is
27.4 mL

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

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