A nitrate ion has 7 protons, 8 neutrons and 10 electrons, what is the overall charge of the ion

The number 89.667 rounded off to three significant figures is

Hemoglobin is the protein that transports oxygen in mammals. Different species of mammals have slightly different forms of hemoglobin. One form of hemoglobin is 0.346% fe by mass, and each hemoglobin molecule contains four iron atoms.

Which of the following terms measures the amount of matter in an object? Weight or mass

What are Newton's laws of Motion? I need all 3.

weak acid. d. weak base. An amphoteric species is one that reacts as a. acid only. b. base only. a (n) c. acid or base. None of the above

What are the horizontal rows on the periodic table?

What is 19 hundred thousandths in scientific notation

There state of matter that keeps its shape and volume when it is placed in a container

Our body solution tests at a pH of about 6.8. This pH is:

A diatomic gas has the molar mass of 38.00g/mol. what is the possible formula?