There are three isotopes of silicon. They have mass numbers of 28, 29 and 30. The average atomic mass of silicon is 28.086amu. What does this say about the relative abundances of the three isotopes?

What does a dyne, a newton, and a pound have in common

True or False If the answer is true, write "true" on the line. If the answer is false, replace the underlined word or phrase with one that will make the sentence correct.

What is the total number of atoms in molecule hno3?

What can humans do to reduce climate change

For the reaction i2 (g) + br2 (g) ←-→2ibr (g), kc=280 at 150 ∘c. suppose that 0.520 mol ibr in a 2.00-l flask is allowed to reach equilibrium at 150 ∘c. part a what is the equilibrium concentration of ibr?

How could you separate items that are different densities? explain

Why do elements within a period of the periodic table have different properties

A professional technician maintains and operates specialized scientific equipment. True False

What is the distance from the highest part of one wave to the highest part of the next wave.

Calculate Delta E when 33.0 g of carbon dioxide sublimes at 77.0 K and 1 ATM