What element is in group 17 and period 2 of the periodic table?

It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 m to 0.32 m at 25°c. how long will it take for the reaction to be 90% complete?

Which of the following is called Energy of activation or Eact? A) The energy released during an exergonic reaction. B) The additional energy required for reactions to occur spontaneously. C) The energy consumed during an endergonic reaction

What is the formula to sulfurous acid? H2S. HSO4. H2SO4. H2SO3.

Besides the ocean where else is water on Earth? Is it always in liquid form?

What particles are used to form bonds

Which statement a-d about a state function is not correct? A - the value of a stage function can change along a path. B-the final value of a state function is independent of the path taken to reach the final state.

100mL of water initially at 35°C is placed inside a calorimeter. What will be the final temperature in the calorimeter if 50g of aluminum initially at 100°C is added to the water?

Which is an example of a chemical change? ripping paper chopping wood baking a cake stretching a rubber band

Scientists have measured and recorded the average rainfall of an area over several years to see if there is a pattern. Which kind of investigation does this best describe? A. controlled experiment B. systematic observation C. field study D.

Is mayonnaise a solution, colloid, or suspension?