Helium has two protons, two neutrons and two electrons. what is the charge of this atom?

a. 0

b. 2

c. 4

d. more information is needed.

2,000 mL is equal to: c? 0.2 L 2 L 20 L 200 L

Which of these substances are molecules? 1. H2O 2. NaCl 3. N2 4. O2 Question 12 options: 3 and 4 All of them 1 and 2 None of them

Which element has six protons in its nucleus?

What is the mole-to-mole ratio between 25 Oxygen and 18 Water

What is the molar mass of acetylsalicylic acid (Aspirin) ? (HC₉H₇O₄)

What do you need in order to do a stoichiometric calculation? (Choose multiple) Balanced Chemical Equation Molar masses of compounds involved The type of reaction taking place Oxidation Numbers

The correct mathematical expression for finding the molar solubility (s) of sn (oh) 2 is:

18. which bond is most polar? H--F H--Cl H--Br H--I

What kind of reaction is ca (s) + h3po4 (aq) ca3 (po4) 2 (s) + h2 (g)

In the teapot dome scandal, what did the secretary of the interior albert fall lease