Which best describes the pH scale?

a) Acids measure below 7.

b) Bases measure below 7.

c) Acids and bases measure above 7.

d) Bases and acids measure at 7.

How many moles of chloride ions are present in a 150.0 mL solution of CaCl2 that has a concentration of 0.340 M?

What is a diagram showing the forces acting on a coasting bike rider traveling at 25 km/h on a flat roadway

Why can't the subscripts be changed?

the air pressure was 101.3 kPa, but the weatherman said it was 1001.3 kPa. What is the percentage error

Explore this interactive illustration by clicking through the presentation on the movement of Earth's tectonic plates through time. The continents of Africa and South America used to "fit together" like puzzle pieces.

A 1.3 g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 86.9 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

In what applications might coal replace petroleum based fuel

How many molecules are in 7.5 mol of h2o

An electron moved from a lower energy level to a higher energy level. What most likely happened during the transition? A random amount of light was released. A fixed amount of energy was absorbed. A fixed amount of energy was released.

Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 57.1 grams of sodium are added to water?