In the chemical equation zn + 2hcl > zncl2 + h2

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

Why is the melting of ice a physical change ?