Answer:
WHAT HAPPENED TO BILL AFTER THAT???
The answer is 1/639, since there are 639 chips, and only one of them is 539.
The pH where you might be able to precipitate as much Cu2 as possible will be any value that is less than 5.85.
<h3>How to illustrate the information?</h3>
The solubility product of salt is defined as the product of molar concentrations of ions in a saturated solution of it.
An ion will be precipitated if the ionic product exceeds the solubility product of the cation. In the case of Cu and Zn, the solubility product is greater for Zinc than Copper.
Also Cu will be precipitated in an acidic medium while Zn is precipitated in an alkaline medium. We have for CuS, K= S2 so S = 2.4495*10-8. For ZnS, S = 0.1414. So the lower the pH higher will be the amount of CuS precipitated.
If we are starting with 0.075M CuS and ZnS solution it will have 0.075 moles each of Cu2+, Zn2+, and S2. Since the anion concentration can be equated to POH, POH for Cus and Zns are 14.096 and 5.85.
The maximum precipitation will take place is any value which is less than 5.85.
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We have the expression <u>12h+30w</u> to represent an employees salary.
h represents the number of <u>hours worked</u>
w represents the number of <u>wagons sold</u>
<u />
To find the answer, simply insert the numbers given where their corresponding variables are in the expression.
12(6 hours) + 30(3 wagons)
(12*6) + (30*3)
72 + 90 = 162
So the employee earns $162
Answer:
Safety precautions in the heat transfer laboratory depend on the equipment that you will use.
Explanation:
The safety measures or precautions that an experimenter needs to bear in mind depends on the types of equipment he/she's using in experimenting. But, there are general precautions to consider.
There are three different ways to transfer heat, including convection, conduction, and radiation. <em><u>Convection</u></em><u> </u>pertains to the heat transfer between liquid or gas molecules moving circularly. Through that, their temperature and density are both affected. <em><u>Conduction</u></em><em> </em>and radiation are polarities. The heat transfer happened when two objects touched one another in conduction. On the other hand, <em><u>radiation</u></em> occurs when two objects do not touch each other.
Generally, precautions in performing these three experiments include the following:
- Careful handling of glassware to avoid cracking or breaking it.
- Avoid spilling the liquid or any content of the glassware.
- Do not touch any hot object.
- Use a hot pad to transfer hot objects from different places.
