In chemistry and physics, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Answer:
The cube of gold will have the greatest mass.
Explanation:
All the cubes have the same size, so they have the same volume.
The property that varies among the cubes is density.
D = m/V Multiply both sides by V and transpose.
m = DV
Since V is a constant, m ∝ D.
That is, the cube with the greatest density will have the greatest mass.
The observed densities are
Iron = 7.9 g/cm³
Brass = 8.5 g/cm³
Lead = 11.4 g/cm³
Gold = 19.3 g/cm³
Gold has the greatest density, so the cube of gold has the greatest mass.
Uhhh, that looks like a game. I don't know how to tell u the answers for that thing -_-
Cleaning bleach is a mixture of chemicals. pure bleach is called hypochlorite<span> and is a pure substance.
hope i helped :)</span>
Answer:
48.32 g of anhydrous MnSO4.
Explanation:
Equation of dehydration reaction:
MnSO4 •4H2O --> MnSO4 + 4H2O
Molar mass = 55 + 32 + (4*16) + 4((1*2) + 16)
= 223 g/mol
Mass of MnSO4 • 4H2O = 71.6 g
Number of moles = mass/molar mass
= 71.6/223
= 0.32 mol.
By stoichiometry, since 1 mole of MnSO4 •4H2O is dehydrated to give 1 mole of anhydrous MnSO4
Number of moles of MnSO4 = 0.32 mol.
Molar mass = 55 + 32 + (4*16)
= 151 g/mol.
Mass = 151 * 0.32
= 48.32 g of anhydrous MnSO4.
