Answer: Notice that mercury(II) oxide decomposes to form liquid mercury and oxygen gas in a 2:1 mole ratios. This means that when 2 moles of ...
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1.0 L at STP Explanation: Start by writing the balanced chemical equation that describes t
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c .force and gravity hope this the right answer
Answer:
Speeding up: graph 6
Slowing down: graph 1
Fast Constant Speed, forward: graph 2
Slow constant speed, forward: graph 5
Fast constant speed, Backward: graph 4
Slow constant speed, Backward: graph 7
Sitting still: graph 3
(Im not 100% but this makes the most sense i think)
Percent by mass of platinum in white gold = 100% - 45% = 55%
We let x be the mass of the white which is 45% gold and 55% platinum.
Mass of gold in white gold = m x 0.45
where m is the total mass.
From the given above, we formulate the equation that would allow us to determine the mass of white gold.
154 = x (0.45)
x = 342.22 g
Then, we determine the amount of platinum.
mass of platinum = (342.22 g)(0.55)
mass of platinum = 188.22 grams
Thus, 188.22 grams of platinum is needed.