List 2 physical properties that can be used to differentiate between a Cu (before 1982) penny and a Zn (after 1982) penny.

How many formula units of CaCO3 are present in 4.72 n of calcium carbonate?

The silica-oxygen tetrahedra is the building block of which chemical class of minerals?

A sample of gas has a volume of 4.4 liters when the pressure is 3.3atm. What is the volume when the pressure is reduced to 2.2atm, if all other remain constant

An organism had 1,000 grams of carbon-14 (a radioactive form of carbon) in it when it died. How much remains after five half-lives?

The data below were determined for the reaction shown below. s2o82 - + 3i - (aq) → 2so42 - + i3 - expt. # [s2o82-] (m) [i - ] (m) initial rate 1 0.038 0.060 1.4 * 10 - 5 m/s 2 0.076 0.060 2.8 * 10 - 5 m/s 3 0.076 0.030 1.

Why dont we use words like prove or does not prove in science

The two separate rows found below the periodic table are so placed because? A. Their chemical properties are so different from all the other elements B. Placing them where they really fit chemically would make the table too wide to use easily C.

Which is a product of the electrolysis of water containing a low concentration of kno3?

Where are alkaline earth metals found on the periodic table

IKI will turn deep purple in the presence of starch. Which term is applied to IKI in this situation? A. indicator B. litmus C. modifier D. product