Which species represents a chemical compound?

(1) N2 (3) Na

(2) NH4 + (4) NaHCO3

Which gases are expected to behave most ideally at a given temperature and pressure?

What element is used in a liquid metal used in thermometers

How can one tell how much of each reactant will be used in a reaction? A. The coefficients tell the ratio of grams of reactants used in the reaction B. The molar masses of the molecules tell how many moles of each reactant are used C.

What is the difference between an amide and an amine? And what is a substituted amide?

For the reaction? H2 + ? O2 →? H2O, what is the maximum amount of H2O (18.0153 g/mol) which could be formed from 9.43 g of H2 (2.01588 g/mol) and 12.98 g of O2 (31.9988 g/mol) ? Answer in units of g.

When delta h is negative the reaction will be endothermic?

Why the atoms k2so4 bond

Whats the relationship between the temperature and the density of a substance

If you can smell a cleaning solution from across the room, you are experiencing the result of which liquid property? viscosity surface tension cleavage planes volatility

What is the effect of 1 mol dm-3 hydrochloric acid on a bulb? Explain why this effect happens.