Answer:
a number assigned to an element in chemical combination which represents the number of electrons lost (or gained, if the number is negative), by an atom of that element in the compound
Explanation:
sodium, magnesium, iron is zero.
Answer:
Technical program - cosmetologist
The scientific notation of 420,000 is : 4.2 x 10 ^ 5
Answer:
B.
Explanation:
When water separates into hydrogen and oxygen gas, a decomposition reaction is taking place (one substance breaking apart or breaking down into two or more substances).
The law of conservation of mass tells us that mass is not created or destroyed during a chemical reaction, so the total mass will remain the same. This is supported by the diagram on the page, which shows that in the reactants, there are four hydrogen atoms and two oxygen atoms, and this amount is the same on the product side.
Assume you have 1 L of the material (you can assume any volume you want, you'll get the same answer).
<span>Using the density, the one L has a mass of 1114 g </span>
<span>20% by mass of phosphoric acid means the mass of phosphoric acid is 0.20 * 1114 g </span>
<span>Calculate the moles of phosphoric acid </span>
<span>Molarity, M, mole / L = moles of acid / volume or 1 L</span>
