Category: Chemistry

What’s the velocity of the rocket? Use .

A rocket with a mass of 10,000 kilograms is propelled upward with 8,000,000 joules of kinetic energy. The velocity of the rocket is__

Suppose an EPA chemist tests a sample of groundwater known to be contaminated with copper(II) chloride, which would react with silver nitrate solution like this: (aq) (aq) (s) (aq) The chemist adds M silver nitrate solution to the sample until silver chloride stops forming. She then washes, dries, and weighs the precipitate. She finds she has collected of silver chloride. Calculate the concentration of copper(II) chloride contaminant in the original groundwater sample. Round your answer to significant digits.

Calculate the pH at the equivalence point when 22.0 mL of 0.200 M hydroxylamine, HONH2, is titrated with 0.15 M HCl. (Kb for HONH2

Calculate the pH during the titration of 20.00 mL of 0.1000 M HNO2(aq) with 0.1000 M KOH(aq) after 13.27 mL of the base have been added. Ka of nitrous acid = 7.1 x 10-4.

One mole of copper has a mass of 63.5 grams. Approximately how many atoms of copper are present in one mole of copper?

63 atoms
64 atoms
32 × 1023 atoms
6 × 1023 atoms

DNA contains genetic codes that we inherit from our parents and these genes are instructions for making