Which of the following is an element?

Orange juice

HCl

Acid

Oxygen

How to make a brief lab report

What is the average rate of the reaction between 10 and 20 s?

What is a Formula relating pressure force and area

When sodium metal is added to water, an orange flame is observed on the metal surface. Based on this observation, what can best be concluded? A physical change occurs because the metal gets smaller.

Which of an atom's subatomic particles are involved in chemical bonding? Select one: a. valence electrons only b. neutrons only c. protons and valence electrons only d. neutrons and protons only

Model describe how you would show j. j. thomson's model of the atom using small beads and clay

Switching one substance for another is called ... ? a) displacement b) synthesis c) decomposition d) oxidation

C2h4 + O2 - CO2 + H2O If we start with 20 grams of CH4, how many moles of CO2 will form?

How does chemical energy relate to the atom and how can we use it?

A positively charged atom is known as a cation. A cation will? ... A) have more protons B) have to same number of protons and electrons. C) Be the same as a neutral atom. D) have more electrons.