A jeweler guarantees that a piece of jewelry is at least 95% gold, by mass. You consider buying a piece of gold jewelry that wei
ghs 9.85g and has a volume of 0.675cm3. The jewelry contains only gold and silver. Suspicious of the jeweler, you look up the density of gold and silver, they are 19.3g/cm3 and 10.5g/cm3, and do a quick calculation to find out the % by mass of gold. Is the jeweler trying to cheat you?
The process of heating coal in the absence of air is called the destructive distillation of coal. ... When coal is heated in the absence of air, a number of products are obtained. 0.0.
In the Lewis structure, each single bond drawn between elements contain two electrons. The electron dots represent the lone pairs. These are the electrons that take part in the reaction. To obey the octet rule, the oxygen must have eight electrons around it. The hydrogen is exempted from this rule. Therefore, you have to show two electrons.
