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447 views

Which is more electronegative, Anions or Cations? [closed]

Electronegativity is the tendency of atoms in covalent bonds to attract electrons closer to themselves (I'll admit I realised ions do not form covalent bonds only after I finished writing). ...
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2answers
54 views

How do I write a balanced redox reaction for the oxidation of chalcocite [(Cu2S) (s)] by O2 (g) to form Cu2+ (aq) and SO42- (aq) [closed]

I'm not exactly sure how to get the oxidation and reduction half reactions. Any help will be much appreciated!
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1answer
45 views

Grams of solution of magnesium chloride given molarity of chloride ion [closed]

To make 100. mL of a solution that is 0.25 M in chloride ion, how many grams of magnesium chloride would you need to dissolve? I had a few different approaches to this, but my most immediate thought ...
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votes
1answer
159 views

Reactions with a positive Delta H and a negative Delta S are said to be nonspontaneous at ALL temperatures. But what if the temperature IS low enough? [closed]

What I mean is, that if you use G = H-TS and make the temperature low enough, couldn't you make any reaction spontaneous? For example, you have a Delta H of 85 kJ and a Delta S of -66 J/K. I've been ...
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1answer
64 views

Why are functional groups a part of hydrocarbons? [closed]

So, I was asked a very innocent question by my friend that all hydrocarbons are defined as compounds made up entirely of hydrogen and carbon(which can be confirmed by going to any educational site ...
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2answers
58 views

What exactly is hydrolysis? What are the products of hydrolysis of aluminium?

I came across three reactions while studying p-block compounds in inorganic chemistry. $$\ce{2Al + 2NaOH + 6H2O -> 2 Na[Al(OH)4] + 3H2} \label{eq:1} \tag{1}$$ $$\ce{Al2O3 + 2NaOH + 3H2O -> 2 Na[...
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votes
1answer
217 views

How can you increase the pH of an acidic solution by 1?

In order to increase the pH of a solution of some acid $\ce{HA}$ by 1, how many times must it be diluted by? The pH log scale suggests that the required dilution factor is 10. Is that generally valid ...
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1answer
107 views

Number of moles and Avagadro's number [closed]

Counting # of atoms don't match in rounding? The total number of atoms contain in 1.0L as 1000g of liquid water must equal the total number of atoms contained in a gas released by 1000g of liquid ...
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votes
1answer
82 views

KMno4 is the strongest oxidizing agent. So why does it tend do have +2 oxidation state with reaction with acids? [closed]

Manganese has an oxidation state of +7 in potassium permanganate. When reacted with sulphuric acid, how does it tend to have +2 oxidation state by forming $\ce{MnSO4}$ along other products ? In acid, ...
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1answer
64 views

Calculate concentration of 10 µM to ng/ml Cannabidol [closed]

I would like to calculate the concentration of 10 µM unit in vitro to blood plasma unit ng/ml? What formula do I need to use? Do I need to use molecular weight? In my case, it is 314,47 g/mol for ...
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votes
1answer
101 views

Terminologies used in isomerism [closed]

What is the difference between the terms constitutional isomers, stereoisomers, geometric isomers? I know cis and trans-1,2-dichloroethane shows cis trans isomerism and 1,1 dichloroethene, 1,1,2 ...
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votes
1answer
72 views

Molecular Structure

What's the meaning of the triangle and striped line in this structure of $\ce{H3O+}$: Can someone suggest me a site to learn about this? (I'm quite a novice in chemistry.) Thanks
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2answers
218 views

What are the differences and similarities of Sugar Alcohol and the Alcohol in Alcoholic Drinks? [closed]

Question part 1: In particular of Sugar Alcohols, I ask about Sorbitol. I am a 100% strict teetotaler. I do not care if a small dose will not intoxicate me, I am absolutely anti-alcoholic. Recently I ...
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votes
1answer
31 views

is there any single non toxic compound/chemical which can give direct color change by react with pure ethanol? [closed]

I want single compound/reagent/chemical/paper/dye which gives colored reaction with pure ethanol and it should be non toxic as well. By simply adding/diping it to pure ethanol it should give color ...
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votes
1answer
80 views

how to calculate the dihedral angle [closed]

I need to calculate the dihedral angle between C20 and C19, as well as between C19-C18. Can someone help me choosing the right combination? I have used the following one: C18C19C20C23 for the first ...
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votes
1answer
41 views

Why is baking soda good at dissolving grease? [closed]

Can someone please explain why baking soda is good at dissolving grease? Thanks,
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votes
1answer
184 views

if we mix bleaching powder in water will this be converted to Sodium Hypochlorite? [closed]

if we mix bleaching powder in water will this be converted to Sodium Hypochlorite ?
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votes
1answer
97 views

How to calculate the concentration of reagents and products from Kc? [closed]

In the synthesis of ammonia at equilibrium constant is $K_c = 1.2$ according to the reaction: $$\ce{N2 (g) + 3H2 (g) <=> 2NH3 (g)}$$ If an equilibrium is proposed based on initial ...
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votes
1answer
57 views

Organic chemistry [closed]

Could someone tell me what happens when a compound having a benzene ring reacts with a mixture of NaOH/HCHO? What reaction and mechanism does this follow?
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1answer
87 views

What are the products of these 3 reactants? Acetic Acid + K2CrO4(aq) + Ba(NO3)2(aq) [closed]

Acetic Acid + K2CrO4(aq) + Ba(NO3)2 (aq) —> ?
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1answer
87 views
-4
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1answer
33 views

Surely distilled water is the answer to a polluted planet [closed]

I have been researching a long time on best water to drink and find that there are so many sources of pollution from industry, farming, agriculture and so forth creating run off into our fresh water ...
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1answer
43 views

What would happen if we supercool and then superheat an atom very abruptly? [closed]

Now scientists have found ways to cool atoms to temperatures far lower than we ever could before and maintain them for longer, but what if we had one of those particles and then heated it as fast we ...
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1answer
69 views
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1answer
2k views

ml/min to mol/min [closed]

After completing a continuous distillation experiment, i am trying to convert my feed flow which i set to 30 ml/min and into mol/min to determine a mass balance equation. If i use the equation below ...
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votes
1answer
37 views

Help reading a phase diagram? [closed]

How does the y axis work? If the pressure I am looking for is 10^‐4 to 10^‐3 nbar? I tried doing log of the yaxis but its giving me numbers that are not even close to what I am looking for.
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votes
1answer
452 views

I need some help on this Chemistry question can any one help please!! I need to find the cost of a single atom of aluminum [closed]

A 75 ft2 roll of aluminum foil costs $3.79. A 12"x12" pieces has a mass of 1.0 g. How much does a single atom of aluminum cost, in dollars? i need to show all my work i am so lost.
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votes
1answer
129 views

What is the real structure of atom showing every ORBITAL [closed]

Since the Bohr's atomic model was rejected and new concept of orbital was introduced so what is the real structure of an atom showing each and every orbital?
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2answers
3k views

Why does acetic acid (CH3COOH) conduct electricity the worst in comparison to HBr, HCOONa and NaNO3 [closed]

Which of the given substances (in an aqueous solution) conducts electricity the worst: $\ce{CH3COOH}$, $\ce{HBr}$, $\ce{HCOONa}$ and $\ce{NaNO3}$? I've found this assingment included in the 2017 ...
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1answer
2k views

Trends in ionization energy in the second period [closed]

Question Which element among the following has the highest ionisation energy: fluorine, oxygen, neon. I know that all these elements belong to period 2 and ionisation energy increases from left ...
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votes
1answer
59 views

production of HCl I have a long question

SO chlorine gas bubbled through water produces HCl acid. Presumably the chlorine ions split open the Hydrogen off the H2O molecule so what happens to the OH- radical produced why doesnt that reduce ...
-4
votes
1answer
61 views

How do you arrive at the second form of the 1st order integrated rate law? [closed]

As I understand it, the first-order integrated rate law is: $$\ln[\ce{A}] = \ln[\ce{A}]_0 - k t$$ However, I'm also told that this can be expressed as a ratio of $[\ce{A}]_0$ and $[\ce{A}]$, as ...
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votes
1answer
60 views

Do serotonin drugs contain serotonin or a precursor to it, e.g. tryptophan?

With serotonin drugs, is it actually serotonin in the drug, or is it tryptophan which converts into serotonin through the biochemical conversion process after the drug is consumed? Serotonin can be ...
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votes
1answer
2k views

How do I calculate the molarity of a 40% w/v HCl solution? [closed]

A 40% hydrochloric acid (w/v) is found to have density of 1.20g /mL. The molarity of the solution is nearly?
-4
votes
1answer
459 views

Moles and chemical equations [closed]

Sulfur reacts with oxygen according to the following equation: 2S + 3O2 -----> 2SO3 If 4 moles of sulphur reacts with 9.5 moles of oxygen, how many moles of oxygen would remain after the reaction?
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votes
1answer
5k views

How much energy is needed to convert 20.0 grams of water at 15.0 degrees C to steam at 100.0 degrees C? [closed]

How much energy is needed to convert 20.0 grams of water at 15.0 degrees C to steam at 100.0 degrees C?
-4
votes
1answer
156 views

Identify A, B and C and write the chemical equation [closed]

Please solve this question. I really want to know what is the answer of this question. Please help.
-4
votes
1answer
100 views

Which corrodes faster at 5% NaCl solution at room temperature: Steel or Aluminum? [closed]

Which corrodes faster at 5% NaCl solution at room temperature: Steel or Aluminum? Is it true that Al has high corrosion resistance? Or is it just a myth as stated in this article.
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votes
1answer
1k views

Ionisation energy [closed]

Explain why the 1st ionization energy of boron is less than that of beryllium, whereas the 2nd ionization energy of boron is greater than that of beryllium.
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votes
2answers
770 views

What happens when utensils are washed in detergent or soap.what type of reaction it is? [closed]

What happens when plates after dinner are washed with soap or detergent ? What colour change is observed? What type of reaction it is?
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votes
1answer
419 views

Organic Chemistry..What is the order of importance when naming a hydrocarbon? [closed]

What is the order of importance when naming a hydrocarbon? How do you know what becomes the suffix, and what becomes the prefix between the functional groups?
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votes
1answer
543 views

Resonance energy [closed]

Which resonating structures are more stable . How to comment about stability among resonating structures . What are its criterea ? Explain with simple examples with rule?
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votes
1answer
467 views

units of mole formula [closed]

I am a high school student.I am currently studying "moles" chapter in my textbook.I think my book is misleading me in regards with units of a formula. The formula is, NO.of moles= (Given mass of an ...
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votes
1answer
79 views

charged particles [closed]

Why are charged particles influenced by magnetic fields? Is it the charicteristic charge itself that the field interracts with (positive or negative) or is there something else about the proton or ...
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votes
1answer
192 views

An **atom** is the smallest constituent unit of ordinary matter that has the properties of a chemical element [closed]

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. my Question:ordinary matter = chemical element??? A chemical compound is an entity ...
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votes
1answer
6k views

Chemical Reaction ammonium hydroxide + aluminum chloride (3NH4OH + AlCl3 -> 3NH4Cl + Al(OH)3) [closed]

What is the color of the precipitate of Al(OH)3?
-4
votes
2answers
2k views

How to find the equivalence point on a graph of an acid-base titration curve? [closed]

Here is the data taken from the lab: Acid pH, Vol (cm3)[ (9.67, 4cm3) (9.08, 8cm3) (8.70, 10cm3) (8.06, 12cm3) (7.93, 13cm3) (4.76, 14cm3) (2.45, 15cm3) (2.23, 16cm3) (2.10, 17cm3) (2.01, ...
-4
votes
1answer
126 views

An acid and Sodium carbonate [closed]

I have to explain why it 'fuzzes' when an acid is added to Sodium carbonate? And what are the relevant Chemical equation(s).. I'm stuck with this question. I'd appreciate some help here. Thanks a ...
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votes
1answer
6k views

Why does a diatomic carbon molecule not exist? [closed]

Many p-block elements which are the first in their respective groups show $pπ-pπ$ multiple bonding. Why doesn't carbon do so?
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votes
0answers
20 views

What is the best air fuel ratio for a potato cannon? [closed]

so me and my friends are making a potato cannon and we tried using different fuels (brake clean, starter fluid, hair spray, etc) and we had no success. We only ever had 1 success when we had the ...

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