What was the first part of an atom to be discovered

Rank the following in order of the packing of particles (density) from greatest to least: solid liquid gas

How many moles of iron in a sample that contains 7.91 x 10^23 atoms of iron?

A 50 g sample of iron reacts with 21 g of oxygen to form how many grams of iron oxide?

In which of these statements are protons, electrons, and neutrons correctly compared? Quarks are present in protons and neutrons but not in electrons. Quarks are present in protons, neutrons, and electrons.

The pH of a solution can be calculated from which of the following expressions? a) pH = - log [OH^-] b) pH = log [OH^-] c) pH = - log [H^+] d) pH = log [H + ]

Explain two reasons why we can conclude that the rise of the water in the glass tube is due to root pressure and not transpiration or capillarity

Four type of molecular models

How many particles are in 1 mol of carbon? 1 mol of lithium? 1 mol of eggs? will 1 mol of each of these substances have the same mass?

An organic chemist plans for the synthesis of a complex organic molecule by

Which societal problem can be solved in part by scientist identifying areas of high biodiversity