How many liters are occupied by 1.806 x 1024 atoms of helium gas at stp?

Acompound is found to contain 6.1% hydrogen and 93.9% oxygen. find it’s empirical formula.

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition