Why do elements that make positive ions occur on the left side of the periodic table while those that make negative ions occur on the right?

A concentrated solution of compound A in the same solvent was diluted from an initial volume of 2.00 mL to a fi nal volume of 25.00 mL and then had an absorbance of 0.733. What is the concentration of A in the concentrated solution?

How many moles are in a sample of 4.55 x 10^24 molecules of C3H8?

You are building model cars. Each car has four tires, two doors, and body. If you have 16 tires, 10 doors and 7 car bodies, how many model cars can you build? What is left over after you have built all of the cars?

Which of the following is the most basic level of organization that can perform functions like converting food into energy? Atoms Cells Molecules Tissues

A car travels at 55 mph and gets 11 km/L of gasoline. How many gallons of gasoline are needed for a 3.0 hour trip?

19 The coefficients in a balanced chemical equation represent (l) the mass ratios of the substances in the reaction (2) the mole ratios of the substances in the reaction (3) the total number of electrons in the reaction (4) the total number of

What volume 12.6 M HCL must be added to enough water to prepare 5.00 litters of 3.00 M HCL?

What are the two main types of exact numbers?

A balloon is filled with helium gas. What will happen as the average kinetic energy of the helium particles increases? The balloon will decrease in total volume. The temperature of the balloon will decrease.

Using retosynthetic analysis, complete the synthesis of 2-pentanone from ethanol, proceeding through a keto ester as the synthetic intermediate. g