A fog forms over a lake. What two changes of state must occur to produce the fog?

When an equation is balanced what is the same on both side?

The average cup of coffee contains about 125 mg of caffeine, C3H10N402. Caffeine is also found in tea, colas, and headache remedies. How many atoms of hydrogen are in 1.0 mol of caffeine?

5. Which of the following characteristics in a chemical reaction indicates that a precipitate has formed? a. The product changes c. The product becomes a color only liquid b. A gas is produced d. A solid is produced

What role do hydrogen ions, hydronium ions, and hydroxide ions play in chemical reactions?

In a matrix of unknown or ambiguous content, a good approach to determination of an analyte is to use a. a linear calibration curve method b. a standard addition method c. a method of least squares d. an external standard method

A decomposition occurs when you open a can or bottle of soda. Carbonic acid. H. CO, is in carbonated beverages. It decomposes into carbon dioxide and water.

Can someone reword this? A magnetic substance has magnetic fields. These fields start at the North Pole wrap around the magnet, and terminate at the south pole of the magnet. All magnetic substances have north and south poles

Which of these is produced when fossil fuels are burned? A) oxygen Eliminate B) nitrogen C) hydrogen D) carbon dioxide

Predict the sign of ΔSsys for each of the following processes. Which are positive? (a) Gasoline vapors mix with air in a car engine. (b) Hot air expands. (c) Humidity condenses in cold air.

A system consists of two components, each of which must activate if the system is to activate. One component has a reliability of. 99. The other has a reliability of. 95. The components are independent of one another with respect to reliability.