Seperating funnel method
Pretty close to an ounce, or 1/16th pound. 1.043 ounces One fluid ounce of water weighs 1.043 dry ounces or 0.0652 pounds, and is 29.574 grams.
This is ONLY true of WATER. A fluid ounce of another substance WILL NOT WEIGH THE SAME AMOUNT! A fluid ounce is measure of volume, and a dry ounce is a measure of weight.
Additionally, a gram or kilogram is a measure of mass, which should not be confused with weight or volume. Many people have mistakenly come to use pounds and kilograms interchangeably. The fact is that pounds are a measure of weight, which is a force and is relative to an object's gravity whereas mass is a constant measure of how much something is.
For additional clarity,
1 kilogram weighs 2.20462262 pounds
1 pound is 0.45359237 kilograms
See the Related Questions for more information.
The difference in energy between the energy levels determines color of light emitted when an electron moves from one energy level to another.
Mg dissolves in HClIf you add Mg metal (Mg) to hydrochloric acid (HCl), the Mg will dissolve and will form bubbles of hydrogen gas (H2). As a result of the reaction, water vapour will also be released, and when measuring the volume of H2(g), you need to take into account that water vapour is mixed with the H2(g). When the Mg dissolves, it forms magnesium ions with a +2 charge (Mg2+) , and when the hydrogen atoms form H2 gas, they leave behind chloride ions, Cl-. Then, the Mg2+ ions will bond with the Cl- ions. Here is the single replacement reaction equation:
Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)
A very similar reaction will happen if you add Mg to any strongly acidic solution, such as sulphuric acid. Here the reaction is:
Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)
So, principally all reactions of metal Mg with strong acid (H+) come to the same equation: Mg(s) + 2H+(aq) → Mg2+(aq) + H2(g)
Use Wade's rules: Total no. electrons is (6 x Co) + (16 x CO) = (6 x 9) + (16 x2) = 86 electrons. Assume 12 e are used for each metal fragment for bonding to ligands, ie 72 electrons which leaves 14 electrons for cluster (ie M-M) bonding. In crude terms this can be seen as 7 M-M bonds distributed across the cluster, although a multicenter bonding view with 14 e across all M-M vectors is far more appropriate.