What type of element is helium in the periodic table?

Find the molecular formula of a compound that contains 30.45% nitrogen and 69.55% oxygen. The molar mass of the compound is 92.02 g/mol

A scientific has a lot of support and is more than just a hunch

How long does it take vegetable oil to heat up to 350 degrees Fahrenheit

Why do skiers often get sunburned even in the winter when the sun rays are not very strong?

What are three scales used to measure temperature? what ae the units of each scale

How many electrons should be shown in the lewis symbol for hydrogen?

A 0.070 M solution of the salt NaB has a pH of 9.60. Calculate the pH of a 0.010 M solution of HB. Or, what is the Kb of HB?

Classify each of the following as an element, a compound, or a mixture: (a) iron (b) oxygen (c) mercury oxide (d) pancake syrup (e) carbon dioxide (f) a substance composed of molecules each of which contains one hydrogen atom and one chlorine atom

If an unknown mineral has a hardness between 5 and 9, what could you do to the mineral to find out more about its hardness?

Which of the following events would most likely produce an earthquake? A. During flooding, water exerts pressure on the land, causing wide cracks in the ground. B.