2,220 Answered Questions for the topic organic chemistry

04/12/21

(Chemistry) Mass-to-Mole Conversion
For the reaction C + 2H2 → CH4, how many moles of hydrogen are needed to make 152.5 grams of methane, CH4 ?Round your answer to the nearest tenth. If you answer is a whole number like 4, report the... more
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04/12/21

In the above equation how many moles of N2 can be made when 188.7 grams of CuO are consumed?
2 NH3  +  3 CuO  --> 3 Cu  +  N2  +   3 H2OIn the above equation how many moles of N2 can be made when 188.7 grams of CuO are consumed?Round your answer to the nearest tenth. If you answer is a... more
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Organic Chemistry Science Chemistry Biochemistry

04/12/21

HELP ---> 3 Cu  +   8HNO3  --> 3 Cu(NO3)2   +  2 NO  +  4  H2O
3 Cu  +   8HNO3  --> 3 Cu(NO3)2   +  2 NO  +  4  H2OIn the above equation how many moles of water can be made when 144.1 grams of HNO3 are consumed?Round your answer to the nearest tenth. If you... more
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Organic Chemistry Chemistry Inorganic Chemistry

04/11/21

Fe3+ is yellow, SCN- is colourless, and the [FeSCN]2+ is a very deep blood red. How is it red?!
I don't get how it's red if one's yellow and the other is colorless. How does it turn red?
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Organic Chemistry Chemistry Inorganic Chemistry

04/11/21

When HCl is added to a cobalt/cobalt chloride solution, it turns from pink to blue-violet, why?

Where does LeChatelier's principle say the shift happens? Would it be towards the right because: [Co(h2o6)2+ + 4Cl- <=> [CoCl4]2- + 6H2O. And since Cocl4 is blue, the solution turning that... more
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Organic Chemistry Chemistry Inorganic Chemistry

04/11/21

Using LeChatelier's principle, why doesn't BiCl3 dissolve with water?
In class, we did a bunch of experiments to apply LeChatelier's principle. I get that the equilibrium wants to go towards the direction with the least effects of the stress, but how does this apply... more
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Organic Chemistry Chemistry Biochemistry Chem

04/10/21

Common Ion effect: Calculate solubility

The molar solubility of silver phosphate in a 0.259 M silver nitrate solution is _____ M.
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Organic Chemistry Math Science Biology

04/09/21

Calculate wavelength
Calculate the wavelength of: a.) an electron (9.10×10-31 kg) moving at a speed of 5.81×106 m/s (13000000 miles per hour).      b.) a baseball (0.140 kg) moving at a speed of 40.2 m/s... more
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Organic Chemistry

04/08/21

how many gams of sodium sulfate (NaSO4) are in 0.1 mole of sodium sulfate (NaSO4)
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Organic Chemistry Chemistry Inorganic Chemistry

04/08/21

How do I know if a solution is acidic, basic, or neutral?

I get by looking at pH's you can tell, but given just the compound say LiNO2, LiNO3, KCN, NaClO, how do I know that KCN has the highest PH and is most basic? Is this based on the periodic table? It... more
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Organic Chemistry Chemistry

04/08/21

Identify the products formed in this Brønsted-Lowry reaction. HCO−3+NO−2↽−−⇀acid+base
I get confused with these type of problems. What would the base and acid be?
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Organic Chemistry Science Chemistry Biochemistry

04/08/21

Predict the sign of ΔS for the following reactions. Then predict whether the reaction is spontaneous, non-spontaneous, or dependent on the magnitude of ΔH, ΔS and temperature.

a.) Na2CO3 (s) Na2O (s) + CO2 (g) (endothermic) b.) 2NF3 (l) N2 (g) + 3F2(g) (exothermic) c.) 2XeO3 (s) 2Xe (g) + 3O2(g) (exothermic)
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Organic Chemistry Math Science Biology

04/08/21

Bohr model calculations
Calculate the energy of an electron in the n = 3 level of a hydrogen atom.
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Organic Chemistry Math Science Biology

04/08/21

Bohr model calculations
Calculate the energy for the transition of an electron from the n = 8 level to the n = 7 level of a hydrogen atom.E =  ???JoulesIs this an absorption or an emission process?____???_____
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Organic Chemistry Chemistry Biochemistry Chem

04/07/21

Precipitation: Q vs K, Calculate
When 12.0 mL of a 1.73×10-4 M sodium hydroxide solution is combined with 15.0 mL of a 3.79×10-4 M cobalt(II) bromide solution does a precipitate form? (yes or no)For these conditions the Reaction... more
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Organic Chemistry Science Chemistry Biochemistry

04/07/21

Need help before April 10th! Please and thank you!
___C6H6+ ___Cl2→ ___C6H5Cl + ___HClWhen 39.0 g of C6H6reacts with an excess of Cl2, the actual yield of C6H5Cl is 42.0 g. What is the percent yield of C6H5Cl?
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Organic Chemistry

04/06/21

How should I calculate this ?
If the dose rate from a sample of Tc-99 was found to be 8.5 × 10−5 mSv per hour at 1.6 metres, calculate the dose rate at 4.8 metres. Show your calculations. Give your answer to two significant... more
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Organic Chemistry Chemistry Inorganic Chemistry

04/05/21

What's a vacuum aspirator and how will it affect the color of a solution?

Originally greenish-yellow because of 1M of HCL added. HCO3-(aq) <-> CO2(g) + OH- (aq)But what happens when using a vacuum aspirator? Isn't its point to remove impurities? So how would the... more
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Organic Chemistry Math Science Biology

04/05/21

Ethalpy reactions
The following reaction is endothermic. MgCl2(s) Mg(s) + Cl2(g)    ΔH(1) = 641 kJ Calculate the enthalpy change for the reaction of the elements to form one mole... more
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Organic Chemistry Math Science Biology

04/05/21

Calculate enthalpy change
Given the following two reactions:(1)Pb(s) + Cl2(g)PbCl2(s)     H(1) = -359.4 kJ(2)Mg(s) + Cl2(g)MgCl2(s)     H(2) = -641.3 kJcalculate the enthalpy change for the following reaction:(3) Pb(s) +... more
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Organic Chemistry Math Science Biology

04/04/21

Calculate enthalpy
The following reaction is exothermic. N2(g)+H2(g)+3O2(g)=2HNO3(g) deltaH(1)=-270kjcalculate the enthalpy change for the reaction of the elements to form one mole of HNO3(g). 1/2N2(g)+1/2H2(g)+3/2... more
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Organic Chemistry

04/04/21

Organic chemistry

Under what conditions does transesterfication tend to favor the product?
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Organic Chemistry

04/02/21

Organic Chemistry 12U

Hi! I need help with this question..Draw the protein strand below as a structural diagram. Highlight the peptide linkage.- Lys - Tyr - Met - Val - Gly -
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Organic Chemistry Chemistry

04/01/21

overall equations.

According to the half reactions posted above, what will be my over all equation? reduction: MnO4^- -> Mn^2+oxidation: SO3^2- -> SO4^2-using the half reaction rule, show all of the work... more
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Organic Chemistry Math Science Biology

03/29/21

Use Use primary standard to determine unknown concentration 
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand... more
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