From which orbital do two electrons get lost out of Mg atom to form an octet?

The pressure of a gas in a container is 1.85 atm and occupies a volume of 12.5 L. If the volume doubles at constant temperature, what would happen to the pressure?

What is the ground-state electron configuration of calcium?

What is the coordination number of a chromium atom in the body-centered cubic structure of chromium?

If 14.5 kJ of heat were added to 485 g of liquid water, how much would its temperature increase? Specific heat of water is 4.184 J/g∙°C.

What is the net ionic equation for the reaction between CoCl2 and LiOH?

What is the mass of 56.2 L oxygen gas at STP?

An increase in water temperature is observed when 1.97 g of NaOH is added. The enthalpy change for this reaction is -2.19 kJ. Calculate the ∆H°soln for NaOH.

A 45g silver spoon (specific heat 0.24 J/g∙°C) at 25 °C is placed in 180 g of coffee at 95 °C and the two are allowed to reach the same temperature. What will the final temperature of coffee be? Assume that the coffee has a specific heat as 4.184 J/g∙°C.

Which statement below would be accurate about freezing water (∆H°fus for water 40.7 kJ/mol) ?