The valence electrons of an atom of which element will feel the same effective nuclear charge as the valence electrons of a beryllium (Be) atom?

What is the percent yield for the reaction pcl3 (g) + cl2 (g) ? pcl5 (g) if 119.3 g of pcl5 (? = 208.2 g/mol) are formed when 61.3 g of cl2 (? = 70.91 g/mol) react with excess pcl3? a 66.3%?

Which of the following is the Arrhenius definition of an acid? a. a substance that donates a hydrogen ion to another substance during a reaction b. a substance that increases the concentration of hydronium ions when dissolved in water c.

Which compound will most likely dissocate when dissolved in water select all that apply

A sample of argon has a volume of 1.2 L at STP. If the temperature is increased to 22°C and the pressure is lowered to 0.80 atm, what will the new volume be, in L?

How many moles of sulfur dioxide are in 2.26x10^33 sulfur dioxide molecules?

What is the ratio of carbon, hydrogen, and oxygen in most carbohydrates?

Radium-223 is a radioactive isotope with a half-life of 11.4 days. how long (in days) will it be before 87.5% of the sample has decayed?

Which kind of reaction is shown below? 2H2O2 → 2H2O + O2

Phosphorus has the molecular formula p4, and sulfur has the molecular formula s8. how many grams of phosphorus contain the same number of molecules as 7.88 g of sulfur?

Latitude is the only factor that determines the temperature of a region true or false?