Why are noble gases considered to be non-reactive

Which properties does the composition of atoms determine about a mineral? A. physical properties only B. chemical properties only C. both organic and inorganic properties D. both physical and chemical properties

What mass of sodium benzoate should be added to 150.0 ml of a 0.15 m benzoic acid solution in order to obtain a buffer with a ph of 4.25? (assume no volume change.) ?

How many liters of 18.5 molar HCl stock solution will be needed to make 25.0 liters of 1.5 molar HCl solution? Show the work used to solve this problem.

How can the solubility of a solution be increased? By increasing the temperature. By decreasing the temperature. By increasing the amount of solvent added. By decreasing the amount of solvent added.

Identify each definition that applies to the compound in red Check all that apply Mg (OH) 2 + H 2 SO 4 2H 2 O+MgSO 4

N2 + 3H2 2NH3 How many molecules of H2 are in the reaction? molecules How many nitrogen atoms are present? atoms How many moles of NH3 are formed? moles

Submit At 25.0 C, a 10.00 L vessel is filled with 5.00 atm of Gas A and 7.89 atm of Gas B. What is the mole fraction of Gas B?

Which energy change occurs during boiling? A. Some heat energy of the substance is lost. B. Heat energy of the substance remains the same. C. Most heat energy of the substance is lost. D. Heat energy is absorbed by the substance.

How many liters of phosphine are formed when 0.42 L of hydrogen react with phosphorus

Which sample of matter has the greatest distance between molecules at STP? A) N2 (g) B) NH3 (aq) C) C6H14 () D) C6H12O6 (s)