What does it mean to say that mass is conserved during a chemical change

Rutherford, geiger, and marsden's experiment demonstrated that the volume of the nucleus is roughly what fraction of the volume occupied by the electrons?

Why dosn't the density of an object change when you adjust the volume and mass?

A product that is a chemically bonded combination of reactants will form in which type of reaction? Check all that apply. synthesis A) polymerization B) decomposition C) oxidation D) replacement

What 5 kinds of evidence can you use to determine if a chemical reaction has occurred?

S (Express your answer as an ion)

Consider the reaction: 8H2S (g) + 4O2 (g) →8H2O (g) + S8 (g). Δ[H2S]/Δt = - 0.033M/s. Find Δ[O2]/Δt. Δ[H2O]/Δt. Δ[S8]/Δt. Find the rate of the reaction.

At room temperature and pressure what is the volume of one mole of oxygen?

Ibuprofen, a common pain remedy, has an empirical formula of C7H9O and a molar mass of approximately 218.078 grams per mole. What is the molecular formula of ibuprofen?

Copper (cu) is a transition element used in the making of coins. calculate the mass in grams of 0.0420

In 1864, the Solvay process was developed to make soda ash. One step in the process is represented by the balanced equation below.