explain why some metals are found to occur freely in nature while other occur only as compound with example of each types of metals

How many moles of Oxygen are in 0.52 mol of Ca (NO3) 2?

If you examine the ir spectrum of an unknown how could you tell if it is an alcohol

An elements atomic number is 57. How many protons would an atom of this element have?

Who determines the crude oil specifications at production facilities?

What does variables mean

Why does the body of the bird covered with feathers?

One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 2 atoms of oxygen, 4 atoms of nitrogen. write the formula for caffeine with the elements in the order they are given.

A piece of magnesium metal is heated in the presence of chlorine gas, and a reaction takes place. What compound will most likely be produced? A. Mg2C1 B. MgCl3 C. MgCl2 D. MgCI

What is the pressure of the gas in this mercury manometer if h = 81 mm and atmospheric pressure is 749 mmHg

A microscope containing two or more lenses is an