At STP, a 12.0-liter sample of CH4(g) has the same total number of molecules as

A) 6.0 L of H2(g) at STP

B) 12.0 L of CO2(g) at STP

C) 18.0 L of HCl(g) at STP

D) 24.0 L of O2(g) at STP

What is the value of the standard enthalpy of formation of an element in its most stable form?

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature

What 3 categories are elements divided