Answer:
8%
Explanation:
Given that,
Mass of solute = 8 g
Mass of soultion, (mass of alloy) = 100 g
We need to find the percent by mass of 8.0g copper is added to enough zinc to produce 100g an alloy. It can be calculated by the formula as follows :

So, the percent by mass is 8%.
<span>Jeremy has change in his moods ad wanted to smoke than usual in addition to Parkinson disease, this may be because his brain is producing less acetylcholine than it suppose to. This is the reason he is lacking certain planning and control of actions and is disoriented.</span>
The correct answer to this question is letter " a. metaphor." <span>Your words are bees about a pear-tree. From that statement, it is comparing words to the bees without the use of any keywords like "like and as ... as." So this is definitely a metaphor, not a simile.</span>
Robert Koch is best known for establishing a link between bacteria and disease.
Robert Koch was a German doctor that made an important contribution to the field of microbiology and public health. During his experiments he identified the particular microorganisms that cause diseases such as tuberculosis, cholera, and anthrax. Koch’s research resulted to the development of Koch's postulates, which are four general principles that links specific microorganisms (such as bacteria) to specific diseases and is being used today in medical microbiology as a standard.
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