If there are 7 moles of copper dissolved in 15 moles of zinc to make 22 moles of a brass solution. What is the mole fraction of copper?

One of the homework questions. I got the answer 2.48898 x 10 - 3 from my calculator. Would I put 2.49 x 10 - 3 as my answer ... is this correct? If a 120-lb woman uses five 2.

A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 31.0 cm wide and 37.2 cm high.

Which allotrope of carbon is the most malleable? A. graphite B. diamond C. fullerene D. coal

A drinking water supply is suspected of being contaminated with lead. Samples of water aspirated directly into an air-acetylene flame gave an absorbance of 0.68 at 283.3nm. Standard solutions containing 0.5 and 1.

You are given a solution of sugar and sand and water your task is to separate sugar from sand which of the following experimental designs would you choose

Aluminum flouride + sulfuric acid=

As glucose is oxidized, how many times do the Krebs (citric acid) cycle turn, and how much NADH, FADH2 and ATP is produced during this process?

The following table shows the period of revolution of some unknown planets of equal mass. Period of RevolutionPlanet Period of Revolution W 1.9 years X 11.

The nucleus of an atom holds 4 neutrons and 4 protons, how many electrons does it have

What types of atoms are in nh3 or ammonia how many hydrogen and how many nitrogen