If you changed the temperature of a ball from 28°C to 14°C, would you expect the pressure to increase or decrease?

How does adding an iron bar to a solenoid affect the magnetic field of the electromagnet? a. It changes the magnetic field to a current. b. It changes the magnetic field's direction. c. It increases the magnetic field's strength. d.

Which compound has the smallest percent composition by mass of chlorine? a. HCL b. KCL c. LiCl d. NaCl

Hardness and density are physical properties. true false

According to Dalton, what happens to atoms during a chemical reaction? 1. Old atoms are destroyed. 2. Atoms gain or lose energy. 3. Atoms are rearranged. 4. New atoms are created.

A chemical element is a pure substance that consists entirely of what?

Categorize the following materials: bronze alloy, mouse growing an ear on its back, porcelain dentures

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.