06/15/23

calculate the specific heat capacity of thallium
A calorimeter designed to have negligible heat loss is used to determine the specific heat capacity ofmetals. A piece of thallium having a mass of 111.2 g is warmed to 95.0ºC and placed into the... more
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06/15/23

How to find out the resulting weight of an acid and metal carbonate reaction?
If I reacted 66ml of 0.18M HCl with 1g of baking soda, the stoichiometry ratio should be around 1:1.I want to know how much CO2 is produced in the reaction (to find out the remaining weight of... more
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06/15/23

Chemistry advanced
The warm water (released/absorbed) heat while the ice (released/absorbed) heat .
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06/14/23

Can someone Double check my work on the ones that are Bold please and thank you

1.    Now you will mass out a sample of the sodium bicarbonate. You will need to open the bottle by pointing at the lid and it will say Remove Lid. Next, grab the scoop and drag it to... more
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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... more
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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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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... more
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06/12/23

Complete ionic equation of Fe3+(aq) + SCN-(aq) <---> FeSCN2+(aq)?
Including spectator ions
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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... more
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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... more
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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... more
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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... more
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06/10/23

calculate the pH in a 0.025 M Ca(OH)2 solution
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06/10/23

which substance can be decomposed by chemical change? why?
a. ironb. ammoniac. argond. helium
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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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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.... more
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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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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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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... more
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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... more
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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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06/06/23

A student dissolves 125.0 g of lead(II) nitrate in enough water to make 250.0 mL of solution. What is the concentration of lead ions in solution in Eq/L?
Make sure you have accounted for the charge on a lead(II) ion.
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06/05/23

What is the concentration?
One type of insecticide decomposes according to second-order kinetics. The rate law of this decomposition is 1.45 yr-1. A sample of this insecticide washed into a lake on July 1st and produced an... more
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06/02/23

Chemistry question

Which molecule has the greatest bond energy?(A) H-Br(B) H-F (C) H-At (D) H-CI(E) H-Icould you explain which option is correct and why?
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06/01/23

Chemistry question

An amino acid has a molar mass of 776.9 g mol and contains 65.34% iodine by mass. What is the number of iodine atoms per molecule of amino acid?(A) one(B) three (C) four(D)fivecould you explain... more
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