Name the gas produced when nitric acid is added to copper metal

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

Which metal exist in liquid state and can be cut with knife ?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?