The mass of a rock sample is 25 g and its density is 5 g/cm3. What is the volume of the rock sample?

How many moles of Fe2O3 are in 209 g of the compound?

At sea level, water boils at 100 degrees celcius and methane boiled at - 161 degrees celcius. which of these substances has a stronger force of attraction between its particles? explain your answer

Is a dilute solution of copper ii sulfate in water homogeneous or heterogeneous?

How many grams of chlorine gas are needed to make 117 grams of sodium chloride

What are the things that severe thunderstorms have with them? a) Moisture, rising unstable air, and a lifting mechanism. b) Thunderstorms only need moisture. c) Moisture, falling air, and a lifting mechanism. d) Falling air

How would a soil that develop in a warm, wet place be different than one that develop in hot, dry place

How do halogens differ from noble gases?

The equilibrium constant at 35 0 K for the reaction Br2 (g) I2 (g) 2IBr (g) has a value of 322. Bromine at an initial pressure of 0. 0500 atm is mixed with iodine at an initial partial pressure of 0.

The number of electrons can accommodate in K shell is 8. True or False

Thermochemical Equations Practice 1) Using the balanced thermochemical equation below: 2H2 + O2 + 2H20 + 241.8 kJ How much heat is released when 12.5 grams of hydrogen (Hz) are completely reacted?