How many moles of water (H2O) are present in a beaker containing 45.9 g H2O? Give your answer to the correct number of significant figures.

(Molar mass of water = 18.02 g/mol) 45.9 g H2O = mol H2O

How did Mendeleev arrange the known elements in his periodic table?

When metal A is placed in a solution of metal ions B2+, a reaction occurs between A and B2+, and metal ions A2 + appear in the solution. When metal B is placed in acid solution, gas bubbles form on its surface.

Fuels cell automobiles use__ gas as a fuel

Elaborate on how the isotopes and their relative abundances affect the average atomic mass of an element. a. average atomic mass comes from the mass of the isotope nucleus and is proportioned by the relative abundances. b.

A compound with the empirical formula SiH3 was found to have a molar mass of approximately 62 g. What is the molecular formula of the compound?

A reaction was run with an initial concentration of 0.15 m. the half-life at 800 k was determined to be 1.751*10-4 s. the value of the half-life is independent of the initial concentration of the reactant present.

g ClO3 - + Fe2+ + 2H+ClO2 + Fe3+ + H2O In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent.

How many atoms of oxygen are contained in 47.6 g of al2 (co3) 3? the molar mass of al2 (co3) 3 is 233.99 g/mol. question 4 options: a. 1.10 * 1024 o atoms b. 3.68 * 1023 o atoms c. 2.96 * 1024 o atoms d. 2.87 * 1025 o atoms e. 1.23 * 1023 o atoms?

What do liver cells do?

What do we call a rearrangement of atoms of substances resulting in new substances?