The volume of a certain bacterial cell is 2.12 m3. What is the volume in cubic centimeters (cm3)? What is the volume in 3.0x104 cells in milliliters (mL)?

There are main groups in the modern periodic table of elements

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

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.)