What is the meaning of the word theory

Why do atoms exhibit line spectrum?

What happens when the acid content of the stomach is reduced? a. pH remains unchanged and pOH decreases. b. pH decreases and pOH increases. c. pH increases and pOH decreases. d. pH increases and pOH remains unchanged.

The second-order decomposition of NO2 has a rate constant of 0.255 M-1s-1. How much NO2 decomposes in 4.00 s if the initial concentration of NO2 (1.00 L volume) is 1.33 M?

Given the following equations, calculate the ΔH of the reaction of ethylene gas (C2H4) with fluorine gas to make carbon tetrafluoride (CF4) gas and hydrogen fluoride gas. Show your work.

2. What happens during ionic bonding?

What is the study of matter called? O A. Chemistry O B. Philosophy O O C. Biology D. Physics

What impact do the amounts of available energy, water, and oxygen have on an ecosystem?

A team of scientist is studying an earthquake. Which task would the physical scientist most likely do

The atomic number of nitrogen is 7. The number of electrons a neutral nitrogen atom has is

Describe the charges of the subatomic particles by choosing the answer from the drop-down menu. Proton have a charge. Have a 0 charge. Electrons have a charge.