A sample of sodium chloride has a mass of 123.45g, how many particles does it have?

What variables are represented by the formula for the first law of thermodynamics? check all that apply. internal energy chemical energy electrical energy heat work?

What is the source of energy used to react chlorine with methane?

How do the atoms of a molecule stay together? A. chemical bonds B. magnetic force C. attraction of electrons and neutrons D. through physical changes

Copper has an atomic number of 29 that means there are 29 protons in the nucleas of each copper atom that's waht the atomic number the number of protons in an atom in the atom of a ceartain element if one copper atom contains 29 proto

Match each career with the academic requirement for the job.

What is the product if an atom of Po-209 undergoes alpha decay?

The first-order decomposition of n2o at 1000 k has a rate constant of 0.76 s-1. if the initial concentration of n2o is 10.9 m, what is the concentration of n2o after 9.6 s

When a catalyst lowers the activation energy of a reaction the rate of the reaction?

Liquids: A) must be contained to stay in one spot B) have a variable volume, but a fixed mass C) are usually more dense than solids and gases D) cannot be changed into gases

Given the following list from the activity series of metals (from most active to least active) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to occur? 1. Co²⁺ (aq) + Al (s) → Al³⁺ (aq) + Co (s) 2.