If you forget to dry off a bread knife and when you washed it and reddish brown spots appeared on it would that be physical or chemical change

What most determines the entropy of a solid? A. The mobility of electrons in the solid B. The crystalline structure of the solid C. The specific heat capacity of the solid D. The enthalpy of formation of the solid

If a typical antacid tablet contains 2.0 g of sodium hydrogen carbonate, how many moles of carbon dioxide should one tablet yield?

Which properties make a good material to use for electrical wires? 1. malleability and reactivity 2. conductivity and ductility 3. ductility and malleability 4. reactivity and conductivity

If you have a sample of honey that has a mass of 20 grams what is the volume

What atoms react not naturally

The brown solid that formed is zinc copper oxygen iron

a solution is approximately 332.0 g of salt per kilogram of solution. Assume this salt is all NaCl. What is the molality of this solution?

What burns fuel to release thermal energy

Scientist call an organism that has two different alleles for a trait

The molar mass of water (H2O) is 18.02 g/mol. Yun needs 0.025 mol H2O for a laboratory experiment. She calculates that she needs 72.0 g H2O for the experiment. Yun's calculation was incorrect because she set up her unit conversion incorrectly.