Which criteria should materials of a technological design meet? Check all that apply.

They must be imported.

They must be affordable.

They must be naturally made.

They must be durable.

They must be available.

Define the atomic mass unit and average atomic mass

Why do elements undergo chemical reactions?

What is the value of the enthalpy change of the uncatalyzed reaction in reverse?

A laboratory experiment was done to show the effects of organic waste on the dissolved oxygen (DO) content in water. Five tanks were set up, each containing fresh water and a small amount of single-celled green algae.

In a coffee-cup calorimeter, 1.55 g KOH is added to 125 ml of 0.80 M HCl. The following reaction occurs. KOH (s) + HCl (aq) → H2O (l) + KCl (aq) Due to the reaction, the temperature of the solution changes from 32.3°C to 38.2°C.

How is the mole similar to a dozen?

What element with the highest electronegativity value? Cesium calcium helium fluorine

How many neutrons and electrons are in Oxygen⁻¹⁷ isotope?

What is science all about?

What type of change is a substance that changes form but remains the same?