How does the entropy change in the reaction 2C2H2 (g) + 5O2 (g) 4CO2 (g) + 2H2O (l) ?

A. The entropy increases.

B. The entropy stays constant.

C. The entropy decreases.

D. It is impossible to tell.

Building a dam to produce hydro-electricity power is one way to take advantage of a common renewable resource. This produces much less pollution than a coal burning plant. However, building dams is not a perfect solution.

You carefully weigh out 11.00 g of caco3 powder and add it to 44.55 g of hcl solution. you notice bubbles as a reaction takes place. you then weigh the resulting solution and find that it has a mass of 51.04 g.

In the periodic table, the elements are organized into groups based on

Clary ran 20 miles in four hours. What was her average speed?

Write the chemical symbol for an element in Period 6 and Group 2A

What do you call all elements that are clearly not metals? ? nonmetals ? metalloids

Which of the slightly soluble salts below will be more soluble in acidic solution than in pure water? a. Mg (OH) 2 b. CaCO3 c. AgCl Mg (OH) 2 d. only Mg (OH) 2, e. CaCO3, and f. AgCl g. CaCO3 only h. both Mg (OH) 2 and CaCO3

What type of chemical bond is formed between two atoms of bromine 1. Metallic 2. hydrogen 3. Ionic 4. covalent

Before oceanography was recognized as its own branch of science it was part of A. Physics B. Chemistry C. Geometry D. Natural science

For a chemical reaction to be spontaneous at all temperatures, which of the following conditions must be met? a. ΔS° > 0, ΔH° > 0 b. ΔS° > 0, ΔH° < 0 c. ΔS° < 0, ΔH° < 0 d. ΔS° 0 e.