Can two elements be used as reactants for a synthesis reactions?

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change. when the temperature in a room increases from 25°c to 33°c, changes from a solid to a liquid. in a lab, methane and nitrogen are cooled from -170°c to -200°c. the methane freezes and the nitrogen . when gold is heated to 2,856°c it changes from a liquid to a .

Find the mass in grams of 1.37x1020 particles of h3po4

What is the molar mass of a gas that has density of 2.054 g/l