What is the minimum total energy released when an electron and its antiparticle (positron) annihilate each other?

Which is a property of an ideal gas? constant volume of molecules strong intermolecular forces of attraction loss of energy during collisions gain of energy during collisions perfectly elastic collisions

determine whether the nucleus or the electron cloud contributes the most to the volume of an atom. Explain.

How many kilograms are in 4 moles of Na2CO3?

Volume in units of what?

Which substance was developed by chemists? A) silk B) nylon D) aspirin

The face-centered gold crystal has an edge length of 407 pm. based on the unit cell, calculate the density of gold.

At stp, 1 l of br2 reacts with 3 l of f2 to completion and produces 2l of a product. what is the formula of the product

A student needed exactly 45.3ml of a solution. what piece of glassware should that student use? justify your choice.

NaCl + H2O → NaOH + Cl2 + H2 How many grams of chlorine gas, Cl2 are given off if 7.5 grams of sodium chloride, NaCl, are decomposed? Is this equation balanced?

What is the net ionic equation for the precipitation reaction between bacl2 and na2so4? a bacl2 (aq + na2so4 (aq? baso4 (s + 2nacl (aq b ba2 + (aq + so42 - (aq? baso4 (s c na + (aq + cl - (aq?