A metal surface becomes dull because of continued abrasion physical change or chemical

What is the nucleon number

How many grams of CaCl2 will be required in order to make a 60mL solution with the strength of 4M? M = mol solute / L of solution

What is the mass in grams of 4.8x10^24 atoms of strontium

As an employee of a summer sports camp, one of your jobs is to prepare the tank of vitamin water for use throughout the day. the mixture calls for 75% pure water and 25% concentrated vitamin drink.

Using the graph below, at what depth does the thermocline begin? A line graph relating ocean depth to water temperature. At 0 meters, temperature is approximately 27°C. At 50 meters, temperature is approximately 24°C.

Calculate the percentage by mass of carbon in carbon monoxide

If entropy increases and enthalpy and temperature remain constant, the Gibbs free energy Group of answer choices A. decreases B. increases C. entropy has no effect

The number 0.000402 expressed in exponential notation is

Energy states of atoms containing more than one electron are influenced by nucleus-electron and electron-electron interactions. Which of the following statements correctly describes these effects? A.

Bromine (Br,) is observed as a red-brown color During the bromination of benzene, an electrophilic aromatic substitution, why does the red-brown color of Br2 disappear as the reaction progresses? a.