Answer:
H
Explanation:
Hydrogen is a nonmetal love:)
For the volume of a solid or liquid
Density = mass/ volume so
volume = mass / density
For the volume of a liquid
Moles = volume x concentration
Volume = moles / concentration
For the volume of a gas
Volume = moles x 24
There are many other formulas as well :)
Answer:
2KI → 2K + I₂
Explanation:
(not my definition, but form a trustworthy source)
The definition of a decomposition reaction is:
a chemical reaction in which one reactant breaks down into two or more products.
In this case, potassium iodide will decompose into potassium and iodine.
2KI → 2K + 2I
2 Potassium and 2 Iodine on both sides, so equation is balanced.
Or, it can be written as 2KI → 2K + I₂
Answer:
7.5 % of Ag
Explanation:
Total mass of sterling silver chain is:
Mass of silver + Mass of copper
33.3 g Ag + 2.70g of Cu = 36 g
% of Silver is (mass of silver / total mass) . 100 →
(2.70 g / 36 g) . 100 → 7.5%
Protons + and electrons - must be equal
3 moles of C has a mass of 36, 3 moles of He is 12
so the answer is :
The carbon sample would have three times the mass of the helium sample
hope this helps
