Why are atoms always neutral

What volume of nitrogen gas is produced by the explosion of 65.0 g of sodium azide at STP? The balanced chemical equation is 2 NaN3 (s) = 2 Na (s) + 3 N2 (g) for this reaction. a. 33.6 L b. 67.2 L c. No right choice.

What type of wave is sound? a. longitudinal b. surface c. light d. transverse

Explain the difference between rotation and revolution. Then use these terms to explain how Earth, the moon, and the Sun move relative to one anothe

Why do we say that heat and temperature are not exactly the same thing?

To what decimal place should each answer be rounded? How many significant figures does the rounded answer have? (a) 101 cm-99.1 cm=1.

Matter only moves if a force pushes or pull it true

What substance cannot be decomposed by physical or chemical means?

Paula is camping with her family. After their parents light a fire, Paula and her sister stand nearby to warm their hands. Her sister thinks that conduction warms their hands. Paula disagrees.

What does it take to prove a hypothesis false? O A. It is impossible to prove a hypothesis false O B. At least ten examples O C. One counterexample O D. A poorly stated question

What new inforamtion can you add the your definition of physical change?