Which of the following has 20 neutrons?

A. oxygen

B. zirconium

C. potassium

D. neon

Which of these provides evidence that a chemical reaction occurs?

Sodium burns in chlorine to form sodium chloride, NaCl. How many grams of sodium chloride will be formed when 1.8 g of sodium is burned in 2.

What is likely to occur in a location where warm, humid air meets cool, dry air? Explain why this happens.

26.6 mL of 2.50 M stock solution of sucrose is diluted to 50.0 mL. A 16.0 mL sample of the resulting solution is then diluted to 45.0 mL. A 20.0 mL sample of this solution is then diluted to 75.0 mL.

What is the balanced chemical equation for calcium with water that produces calcium hydoxide

Which two factors determine sound intensity? A the wave's frequency and speed B the wave's amplitude and the distance from the sound source C the wave's amplitude and speed D the wave's frequency and the distance from the sound source

The electrical wires in your home use what type of circuits? parallel circuits series circuits

In the actual co2 molecule the best description of the number of bonds between c-o atoms is

How many hydrogen atoms are in Ca (OH) 2

Explain fajan's rule