write at least two examples of objects or things for every property 1. malleability 2. hardness 3. conductivity 4. flexibility

Which equation obeys the law of conservation of mass? A. 2Fe+3O2 - -> 2Fe2O3 B. 4Fe+O2--> 2Fe2O3 C. Fe+O2--> Fe2O2 D. 4Fe+3O2--> 2Fe2O3

What type of chemical hazard results from incomplete combustion of petroleum-based chemicals and other organic substances? a. Polycyclic aromatic hydrocarbons b. Polychlorinated biphenyls c. Persistent organic pollutants d.

A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 255 torrtorr. Pure pentane and hexane have vapor pressures of 425 torrtorr and 151 torrtorr, respectively, at room temperature.

How can you tell if a chemical change has occurred?

What is the answer, with the correct number of significant figures, for this problem? 4.392 g + 102.40 g + 2.51 g = ?

What evidence of a chemical reaction might you see in dropping an Alka-Seltzer tablet into a glass of water?

State hess's law. how is it used

When the name of a molecule ends in - ose, the molecule is a

How many moles are in. 12 grams of gold.

When lithium reacts with bromine to form the compound LiBr, each lithium atom: (1) gains one electron and becomes a negativelycharged ion (2) gains three electrons and becomes a negativelycharged ion (3) loses one electron and becomes a