What’s wrong with the statement gold is heavier than gold
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Answer: Gold can't be heavier than itself.
Explanation: If you have a cookie and a cookie, you can't tell the difference. If you have a big cookie and a small cookie, than the big cookie will weight more.
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NEED HELP!!!!!!1s² 2s² 2p⁶ 3s² 3p⁵ is the electron configuration for which element? *fluorinechlorinesulfurbromine
For the reactions system 2H2(g) + S2(g) 2H2S(g), a 1.00 liter vessel is found to contain 0.50 moles of H2, 0.020 moles of S2, and 68.5 moles of H2S. Calculate the numerical value of the Keq of this system. K = Are the products or reactants favored? The equilibrium system N2O4(g) 2NO2(g) was established in a 1.00-liter vessel. Upon analysis, the following information was found: [NO2] = 0.500 M; [N2O4] = 0.0250 M. What is the value of Keq? 3.Which is the correct expression for Keq when the chemical reaction is as follows: N2 + 3H2 2NH3. 4.Reactions which do not continue to completion are called ______reactions.
In what parts of your daily life might you need to calculate the percentage composition of something?
Which list of nuclear emissions is arranged in order from the greatest penetrating power to the least penetrating power?(1) alpha particle, beta particle, gamma ray (2) alpha particle, gamma ray, beta particle (3) gamma ray, alpha particle, beta particle (4) gamma ray, beta particle, alpha particle
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Answer:
Applied science is generally engineering, which develops technology, although there might be dialogue between basic science and applied science (research and development). Medical sciences such as medical microbiology are examples of applied sciences.
Explanation:
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dissolves completely in the solvent, such as water.
Basically, you know when a solution is formed when the material you have placed in the solvent disappears :P
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When we mix salt and water, salt will dissolve. Still, it mass does not disappear, but remains intact. Mass cannot be destroyed. When salt is dissolved in the water, salt molecules are only re-positioned, but all the molecules are present as well as their mass. So if you add 5 grams of salt in 30 grams of water, the resulting mass will be 5 + 30 grams, which is 35 grams.
Answer: The resulting mass would be 35 grams.
Explanation: Mass cannot be destroyed, there would be no need to re-measure the mass. Therefore, if we add the masses we get 35.
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16 H+ (aq) + 2 Cr2O7 2-(aq) + C2H5OH (aq) ? 4 Cr3+ (aq) + 2 CO2 (g) + 11 H2O (l)
If 35.46 mL of 0.05961 M Cr2O7 2-
is required to titrate 28.00 g of plasma, what is the mass percent
of alcohol in the blood?
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Answer:
0.17%
Explanation:
With the equation:
2Cr2O7 2- + C2H5OH + H2O --> 4Cr3+ + 2CO2 + 11H2O
We can assume that every mole of ethanol needs 2 moles of Dichromate to react.
So if in 1L we have 0.05961 moles of dichromate we can discover how many moles we have in 35.46mL
1000 mL - 0.05962 moles
35.46 mL - x
x =
x = 2,11* 10^-3 moles
As we said earlier, 1 mole of ethanol needs 2 mole of dichromate, so in the solution we have 1,055*10^-3 moles of ethanol. We can discover the mass of ethanol present in the solution.
1 mole - 46g
1.055*10^-3 - y
y = 46 * 1.055*10^-3
y = 0.048 g
To discover the percent of alchol we can use a simple relation
28 g - 100%
0.048 - z
z =
z = 0.17%