25,963 Answered Questions for the topic chemistry
Chemistry
06/13/23
When 0.1009 g of sodium cyanide is dissolved in solution
When 0.1009 g of sodium cyanide is dissolved in solution, it takes 19.22 mL of a potassium permanganate solution to reach the end point of the titration. Using the balanced chemical equation...
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Chemistry
06/12/23
Calculate the pH of the conjugate base of 0.100 moldm-3 with pKa of the acid 3.76
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Chemistry
06/12/23
100.0 mL of 1.25 M AgNO3
100.0 mL of 1.25 M AgNO3 is added to 100.0 mL of 1.75 M NaCl in a constant pressure calorimeter. The temperature goes from 22.4 oC to 31.9 oC. Calculate Δ𝐻ΔH of the reaction per mole of AgCl...
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Chemistry
06/12/23
Complete ionic equation of Fe3+(aq) + SCN-(aq) <---> FeSCN2+(aq)?
Including spectator ions
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Chemistry
06/12/23
The combustion of glucose (C6H12O6)
The combustion of glucose (C6H12O6), producing carbon dioxide and water vapor (gas) has a Δ𝐻ΔH of -2540 kJ per mole of C6H12O6.Calculate the energy involved in making 50.0 g of glucose from carbon...
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06/11/23
Anyone who has credible expertise in biological weaponry/anything along those lines, could you answer the following questions?
1. What do you think of the current state of the world and it's preparedness to face a biological attack, especially after COVID-19? 2. In light of the Geneva protocol, why are some countries still...
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Chemistry
06/11/23
The solubility of AB(s) in a 1.000 M solution of C(aq) is found to be 0.114 M. What is the Ksp of AB?
The generic metal A forms an insoluble salt AB(s) and a complex AC5(aq). The equilibrium concentrations in a solution of AC5 were found to be [A]=0.100 M, [C]=0.0210 M, and [AC5]=0.100...
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Chemistry
06/11/23
equilibrium problem- college level general inorganic 2
At a certain temperature, 0.4011 mol of N2 and 1.501 mol of H2 are placed in a 4.50 L container.N2(g)+3H2(g)↽−−⇀2NH3(g)At equilibrium, 0.1401 mol of N2 is present. Calculate the equilibrium...
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Chemistry
06/11/23
heres a question-
If for any electron in an orbital another parameter 'B' is defined as B = n + / + m, where n, l, m are the quantum numbers of that orbital then what will be the maximum value of B for the last...
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Chemistry
06/10/23
which substance can be decomposed by chemical change? why?
a. ironb. ammoniac. argond. helium
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Chemistry
06/10/23
if [H30+] of a solution is greater than [OH-], the solution is... Why?
I thought of the H30+ referring to pH and when the pH increases, it is more basic on the scale since we are reading pH. Is this correct?
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Chemistry
06/10/23
what is the energy of an photon having a wavelength of 4.50 mm?
I used e=hv equation. I converted 4.50 mm to m then to nm which I got 4500000 nm then multiply it by the h constant. I did not get any of the answer choices.a.7.82 x 10^-33 Jb. 1.68 x 10^-26 Jc....
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Chemistry
06/10/23
Are there any books on learning general college chemistry that you would recommend?
Taking second college chemistry course beginning with Gases, Liquids, Solids, and Intermolecular Forces
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Chemistry
06/10/23
Calculate the standard enthalpy change
calculate the standard enthalpy change for 2LiOH(s) + CO2 (g) -> Li2CO3(s) + H2O (g)
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Chemistry
06/09/23
should a polar or nonpolar solvent be used to dissolve solid NH4OH? Why?
I tried drawing the lewis structures of NH4 and OH. Does Nh4 have an expanded octet and if it does what will the drawing look like? Would it be polar ( one extra electron) or non polar (...
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Chemistry
06/09/23
what is the molarity of an H3PO4 solution if 135 mL is completely reacted by 674 mL of 0.200 M Ca(OH)2 solution?
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Chemistry
06/08/23
Can we say the n (shell number) = l - 1 (1=azimuthal quantum number)
Are there any relations between them?
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Chemistry
06/08/23
A sample of a halogen gas has a mass of 0.538 g
A sample of a halogen gas has a mass of 0.538 g and exerts a pressure of 600.0 torr at 14.0 oC in a 100.0 mL flask. Calculate the molar mass of the halogen gas. Is the halogen gas F2, Cl2, Br2 or...
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Chemistry
06/08/23
Determine the mass (in grams) of magnesium
Determine the mass (in grams) of magnesium metal required to produce 40.0 mL of H2 with a temperature of 26.9 oC and an atmospheric pressure of 745 mmHg. Be sure to take into account water vapour...
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Chemistry
06/08/23
A balloon filled with air increases its volume to 58.0 L
A balloon filled with air increases its volume to 58.0 L against a constant external pressure of 0.963 atm and in the process, 107.6 J of energy is absorbed in the form of heat from the...
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Chemistry
06/07/23
The rationale for studying chemistry
The rationale for studying chemistryWhat would be a good response to the rationale for studying chemistry. As in why we study chemistryprovide reasoning (around 200-300 word response)
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Chemistry
06/07/23
How many moles of iron are needed to produce 8.2mole of silver?
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Chemistry
06/07/23
What is the concentration of acetic acid, given it takes 22 mL of 0.2 M NaOH to neutralize a 52 mL sample of the acids?
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