HourglassMage
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Questions Answered

Zain.Mughal.1995:
Group Title
"Solids have highest degree of order"
Explain this sentence in detail.
 updated 14 days ago
 1 reply
 1 Medal
Mathematics

HourglassMage:
Group Title
According to this decay series chart, which is the proper order of nuclear particle emission that occurs during the transition from lead214…
 updated 14 days ago
 45 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
When two atoms of
2
H (deuterium) are fused to form one atom of
…
 updated 18 days ago
 15 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
In a nuclear reaction, the energy released is equal to 8.1 x 1016 joules. Calculate the mass lost in this reaction. (1 J = 1 kg m2/s2)
Answ…
 updated 19 days ago
 62 replies
 3 Medals
Mathematics

HourglassMage:
Group Title
In the reaction, CH4 + 2O2 arrow CO2 + 2H2O, 890 kilojoules of heat are released. Using Einstein's equation, calculate the mass amount to w…
 updated 19 days ago
 20 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
Why did the discovery of nuclear reactions cause the separate laws of conservation of matter and conservation of energy to be combined into …
 updated 19 days ago
 10 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
In a nuclear reactor, uranium235 undergoes a fission reaction that converts some of the released energy into electricity.
Answer True Fals…
 updated 20 days ago
 8 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
Daughter atoms X and Y are formed from the fission of atom Z. Which of the following statements is true about X and Y?
Answer
…
 updated 20 days ago
 16 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
Nuclear fusion occurs when two or more atomic nuclei combine to form a single atomic nucleus with a greater mass.
Answer True False
…
 updated 20 days ago
 4 replies
 1 Medal
Mathematics

math92130:
Group Title
What gets oxidized in a galvanic cell made with magnesium and zinc electrodes?
A. Zn(s)
…
 updated 24 days ago
 12 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
Strontium90 is a radioisotope that will decrease in mass by onehalf every 29 years. How many years will it take for a 10.0gram sample of …
 updated 24 days ago
 12 replies
 3 Medals
Mathematics

HourglassMage:
Group Title
Strontium90 is a radioisotope that will decrease in mass by onehalf every 29 years. How many years will it take for a 10.0gram sample of …
 updated 24 days ago
 12 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
Can someone please listen to this and transcribe it? I would be most grateful...grateful enough to medal and fan...please? "prays"
 updated 25 days ago
 15 replies
 4 Medals
Mathematics

HourglassMage:
Group Title
Consider line segment AB whose endpoints are (1, 4) and (4, 8). If this segment is dilated by a scale factor of 4 centered at the origin, f…
 updated 26 days ago
 7 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
Under a dilation, triangle XYZ where X(1, 3), Y(2, 4), and Z(5, 2.5) becomes triangle X’Y’Z’ where X’(2.5, 7.5), Y’(5, 10), and Z’(12…
 updated 26 days ago
 15 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
Under a dilation, triangle XYZ where X(1, 3), Y(2, 4), and Z(5, 2.5) becomes triangle X’Y’Z’ where X’(2.5, 7.5), Y’(5, 10), and Z’(12…
 updated 26 days ago
 18 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
Given the enthalpies of reaction below, determine the enthalpy change for the reaction: N2O (g) + NO2 (g) arrow 3NO (g).
…
 updated 26 days ago
 15 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
Which of the following is an example of objects in thermal equilibrium?
Answer
…
 updated 26 days ago
 3 replies
 No Medals Yet
Mathematics

HourglassMage:
Group Title
he formation of nitric oxide (N2(g) + O2(g) 2way arrow 2NO(g)) has a Kc value of 4.7 × 1031. A classmate claims that this reaction must re…
 updated 27 days ago
 6 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
Which of the following is the correct equilibrium expression for the chemical reaction:
3A (s) + BC (aq) 2way arrow 2AC (aq) + B (s)
…
 updated 27 days ago
 7 replies
 No Medals Yet
Mathematics

HourglassMage:
Group Title
Which of the following systems possesses the highest entropy?
Answer
…
 updated one month ago
 4 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
Ung the table below, what is the change in enthalpy for the following reaction?
I2 (s) > I2 (g)
Substance ΔHf(kJ/mol)
…
 updated one month ago
 14 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
How many milliliters of a 0.100 M NaOH solution are required to neutralize 25.0 milliliters of 0.150 M HCl?
Answer
…
 updated one month ago
 34 replies
 3 Medals
Mathematics

HourglassMage:
Group Title
Which atoms have undergone oxidation and reduction?
2HNO3 + S > 2NO + H2SO4
 updated one month ago
 2 replies
 No Medals Yet
Mathematics

HourglassMage:
Group Title
In the reaction between the strong acid (HCl) and the strong base (NaOH), which of the ions listed below is a spectator ion?
Answer
…
 updated one month ago
 11 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
What is the boiling point of a 0.75molal solution of a nonvolatile nonelectrolyte solute in water? Kb for water = 0.52 degrees C/ molal.
…
 updated one month ago
 11 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
What volume of 1.25 M sodium hydroxide (NaOH) solution can be prepared using 60.0 g of sodium hydroxide? (The mass of one mole of NaOH is …
 updated one month ago
 7 replies
 2 Medals
Mathematics

HourglassMage:
Group Title
Evaluate [6  (6  2(3  6) + 3)] + 7
The answer is 2. How do I get that?
 updated one month ago
 12 replies
 4 Medals
Mathematics

HourglassMage:
Group Title
How many electrons should be added to balance the following oxidation halfreaction, H2O2 arrow 2 H+ + O2?
Answer
…
 updated one month ago
 8 replies
 1 Medal
Mathematics

HourglassMage:
Group Title
In the reaction, C + 2 S arrow CS2, the substance that is the oxidizing agent is:
Answer
…
 updated one month ago
 5 replies
 1 Medal
Mathematics
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