1. Heat transfer
2. Heat moves from an object of higher temperature to an object of lower temperature
Hope this helps!!!!!
<span>Answer: Mass Spectrometer
Explanation: Using the mass spectrometry method we find the smallest atom. Even the heaviest atoms are only a hundred times heavier than this. There are different types of mass spectrometer all of which work on the same principle.There are three main parts in mass spectrometer: (1) Ion source (2) Mass analyser (3)Detector and recorder.</span>
Answer:
...
Explanation:
find density of salt solution 585g/500cc = 1.17g/cc
leaves density = 1.25g/cc, stars density = 1.12g/cc
Stars float, leaves sink. since everything is in g/cc, you do not have to worry about the info 1ml=1cc.
density = mass / volume.
density of salt solution = 585g(mass)/500cc(volume)
Complete question :
A jeweler has five rings, each weighing 18 g, made of an alloy of 10% silver and 90% gold. She decides to melt down the rings and add enough silver to reduce the gold content to 75%. How much silver should she add?
Answer:
Kindly check explanation
Explanation:
Given the following :
Weight of each alloy = 18g
Initial % of Silver = 10% = 0.1
Initial % of Gold = 90% = 0.9
New % of gold = 75% = 0.75
Hence, new % of silver will be (1 - 0.75) = 0.25
Let the amount of silver to be added = s
Hence,
Initial gold content = final gold content + added silver
18 * 0.9 = 0.75(18 + s)
16.2 = 13.5 + 0.75s
16. 2 = 13.5 + 0.75s
16.2 - 13.5 = 0.75s
2.7 = 0.75s
s = 2.7 / 0.75
s = 3.6
S = 3.6
Hence the amount of silver needed per ring in other to reduce the gold content = 3.6g
Total for the 5 rings = (3.6 * 5) = 18g
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![\huge\blue{Given}](https://tex.z-dn.net/?f=%20%5Chuge%5Cblue%7BGiven%7D)
<u>molar</u><u> </u><u>mass</u><u> </u><u>of</u><u> </u><u>CCl4</u><u> </u><u>=</u><u> </u><u>1</u><u>5</u><u>4</u>
<u>density</u><u> </u><u>=</u><u> </u><u>1</u><u>.</u><u>5</u><u>9</u><u> </u><u>g</u><u>/</u><u>cm</u><u>³</u>
<u>volume</u><u> </u><u>=</u><u> </u><u>1</u><u>0</u><u> </u><u>liters</u>
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![mass = \frac{density}{volume} \\ mass = \frac{1.59}{10 \times 1000} \\ mass \: = \: 1.59 \times {10}^{ - 4} \\ \\ moles = \frac{mass}{molar \: mass} \\ moles = 0.01 \times {10}^{ - 4}](https://tex.z-dn.net/?f=mass%20%3D%20%20%5Cfrac%7Bdensity%7D%7Bvolume%7D%20%5C%5C%20mass%20%3D%20%20%5Cfrac%7B1.59%7D%7B10%20%5Ctimes%201000%7D%20%5C%5C%20mass%20%5C%3A%20%20%3D%20%20%5C%3A%201.59%20%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%204%7D%20%20%5C%5C%20%5C%5C%20%20moles%20%3D%20%20%5Cfrac%7Bmass%7D%7Bmolar%20%5C%3A%20mass%7D%20%20%5C%5C%20moles%20%3D%200.01%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%204%7D%20)