Which of the following is NOT true about relative dating? Question 4 options:

it uses radioactivity to get a more exact age of a fossil

it uses the nearby rock layers.

It finds the approximate age of fossils.

It uses fossils to help pinpoint the ages of rocks.

help me its wotrth 60 give me thr right awnser or i fail the grade

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

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.)

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.