The Nucleus of one boron atom has 5 protons and 4 neutrons. what is the total charge of the boron?.

Match the chemical reactions. 1. molecules rearrange and form new molecules decomposition 2. simultaneous decomposition and synthesis exchange 3. bonds broken and elements released synthesis 4. molecules formed from components reversible

The pressure of 9.0 L of an ideal gas in a flexible container is decreased to one-eighth of its original pressure, and its absolute temperature is decreased to one-ninth of the original. What is the final volume of the gas

5. What is another name for Newton's first law in your own words.

Where do we see exothermic and endothermic reactions in the real world?

for the A groupse (groups 1A to 8A) how does the group number relate to the electron arrangement in atoms of the group

What moves in or out of a substance during a change of state?

2.5 moles of sodium chloride is dissolved to make 0.050 liters of solution

2. The minimized structure of phenacetin is planar, and the chemical shifts of the aromatic protons in the NMR spectrum can be rationalized by electron delocalization.

Altering the pressure of a system can affect the rate of a chemical reaction. true false

What does ice cream melt on a hot day which type of thermal energy transfer does this melting represents