Which region of the periodic table contains the first element ever produced in a lab?

The diagram above is a potential energy curve for a reaction which number represents the effects of a catalyst from the reaction

How are the empirical and molecular formula related answers. coim?

How many moles of ba (oh) 2 are present in 275 ml of 0.200 m ba (oh) 2?

Which statement must be true about a chemical system at equilibrium? (1) The forward and reverse reactions stop. (2) The concentration of reactants and products are equal.

Hana fills a cup with sandy ocean water. She pours the mixture through a filter. What does she collect that passes through the filter?

I have 2 electrons is the first shell, 8 in the second, and 6 in the third

The production of plastics makes life, so it benefits society. On the other hand, the production of plastics causes air and water, so it also harms society.

The total number of moles represented by 20 grams of CaCO3 is

Particles of matter how have both potential and kinetic energy is that true or false?

Visible light waves are part of the blank Spectrum