Nickel-63 has a half-life of 92 years. how much nickel would remain in a sample that started with 20 grams of nickel-63 at the end of 184 years?

What is the molar mass of Mn (ClO3) 2? Explain how you calculated this value.

Use the concept of electron configurations to explain why the number of valence electrons in metals tends to be less than the number in most nonmetals.

What is the name of the ionic compund formed from lithium and bromine?

What is the number of moles in 15.0 g AsH3?

Why is airborne and water borne chemicals both local and global issues

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.

Why is it is difficult to compress a liquid? a. liquid takes the shape of its container. b. the liquid particles flow away when compressed. c. liquid becomes solid when compressed. d. the liquid particles are very close together.