12/03/21
Chemistry: Electrolytes
After dialysis, the level of magnesium in Amanda's blood was 0.0035 g/dL. What is this value in milliequivalents per liter?When I tried to solve this, I got 35, but I did not take Mg into account,...
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12/03/21
Calculate the theoretical yield in grams AlI₃ from the complete reaction of 18.3 grams AI, aluminum iodide, according to the following balanced chemical equation: 2Al(s) + 3I₂(s) →2AlI₃(s)
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12/03/21
Concentration Problems
A 250 mL glass of orange juice contains 30.0 mg of riboflavin, C17H20N4O6.What is the molarity of the riboflavin in this glass?
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12/03/21
What is the temperature (in °C) of a closed, rigid vessel, calibrated to read 1.00 atm at STP, if the pressure reads 1.55 atm?
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12/03/21
If 8.79 g of CuNO3 is dissolved in water to make a 0.850 M solution, what is the volume of the solution in milliliters?
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12/03/21
What is the hydrogen ion concentration, [H+], in an aqueous solution that contains 3.91 × 10-2 M in hydroxide ion (at 25 °C).
Enter your answer in exponential format using a capital "E"
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12/03/21
When 0.30 moles of oxygen react, how many moles of chromium (iii) oxide are produced?
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12/03/21
If 23.6 g of Ca₃(PO₄)₂ reacts with an excess of H₂SO₄, what is the percent yield if 13.4 g of H₃PO₄ are formed in the following UNBALANCED chemical equation?
If 23.6 g of Ca₃(PO₄)₂ reacts with an excess of H₂SO₄, what is the percent yield if 13.4 g of H₃PO₄ are formed in the following UNBALANCED chemical equation?Ca₃(PO₄)₂ (s) + H₂SO₄ (aq) → H₃PO₄ (aq)...
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12/03/21
What is the empirical formula of a compound whose percentage composition is found to be 62.60% lead, 8.40% nitrogen, and 29.0% oxygen?
What is the empirical formula of a compound whose percentage composition is found to be 62.60% lead, 8.40% nitrogen, and 29.0% oxygen?
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12/02/21
Chem help please
At a certain temperature, 0.4011 mol of N2 and 1.561 mol of H2 are placed in a 4.50 L container.N2(g)+3H2(g)↽−−⇀2NH3(g) At equilibrium, 0.1601 mol of N2 is present. Calculate the...
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12/02/21
Chem Help please
At a certain temperature, a 27.5-L container holds four gases in equilibrium. Their masses are 3.5 g SO3 , 4.6 g SO2 , 19.5 g N2 , and 0.98 g N2O .What is the value of the equilibrium...
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12/02/21
the ka of formic acid HCOOH is 1.77 x10^-4 A 0.60 formic aci solution of 0.40 M NAOH.which of the following statements is correct regaring the above titration
a. After adding 60.0 mL of NaOH the pH of the resulting solution is greater than 7b. After adding 20.0 mL of NaOH, the pH of the resulting solution is calculated as the pH = pKac.After adding ...
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12/02/21
Gas law And Phase Change Problems
A 11.0 g ice sample was subjected to a 6.25 kJ of energy in the form of heat. Which of the followting observations will be true for the sample?Select one or more:A. The ice will...
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12/02/21
I have more questions I need help with anyone
How much oxygen (in grams) will form from 24.7 g of N2O5? 2N2O5(s) → 4NO2(g) + O2(g) × 10 (Click to select) g O2
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12/02/21
can anyone help me with this chemistry question
Consider the combustion of carbon monoxide (CO) in oxygen gas: 2CO(g) + O2(g) → 2CO2(g) Calculate the number of moles of CO2 produced if 2.36 moles of CO are reacted with excess oxygen. moles...
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12/02/21
Chemistry Questions
Which of the following solids has the highest melting point?A. SiO2B. CuC. SucroseD. CuOA 11.0 g ice sample was subjected to a 6.25 kJ of energy in the form of heat. Which of the...
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12/02/21
writing the half reactions
Ca (s) + ZnCl2 (aq) --> Zn (s) + CaCl2 (aq)Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.
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12/02/21
In the reaction 4 NH3 (g) + 5 O2 (g) -> 4 NO (g) + 6 H2O (l) The combination of 17.5 g NH3 and 26.2 g O2 produces what mass of NO?
Can someone please help me with this answer I have been stuck on it for quite some time
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12/02/21
Place the following in order of increasing radius. Br⁻, Na⁺, Rb⁺
A. Br⁻ < Rb⁺ < Na⁺B. Br⁻ < Na⁺ < Rb⁺C. Rb⁺ < Na⁺ < Br⁻D. Rb⁺ < Br⁻ < Na⁺E. Na⁺ < Br⁻ < Rb+
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Completing Chemistry Reactions
I was given HNO3 + Ca(OH)2 and need to complete the reaction. I because the reactants are an acid and a base, I will have salt and water as a product. Can you show me how to complete the reaction?
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12/01/21
determining the volume of base needed to titrate
A chemistry student weighs out 0.385g of citric acid (H3C6H5O7), a triprotic acid, into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid...
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12/01/21
Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level 𝑛=7 to the level 𝑛=1
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12/01/21
The carbon–14 activity in papyrus growing along the Nile River today is 231...
The carbon–14 activity in papyrus growing along the Nile River today is 231 decay events per kilogram of carbon. If a papyrus scroll found in the ruins from ancient Egypt has a carbon–14 activity...
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