Questions tagged [chemical-formula]

For questions related to molecular formula, empirical formula, formula unit, representing the chemical proportions of atoms that constitute a particular chemical compound, molecule, ion, complex, crystal, etc. using chemical element symbols, numbers, and other symbols. NOT related to 'notation', 'composition', 'structure' or 'nomenclature'.

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How to find out the Empirical Formula [closed]

An unknown sample was proven to be composed of 17.97% C, 4.534% H, and 77.50% Pb. What is the empirical formula?
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Difference between calcium hypochlorite and calcium oxychloride [duplicate]

Is calcium hypochlorite different from calcium oxychloride, which is commonly known as bleaching powder; How are these different, and in general, how is hypochlorite ion chemically different from ...
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How is Potassium present in Potato (form) and where does it come from originally? [closed]

I was going through the concept of Boiling to reduce the potassium in Potatoes, which means $\ce{potato + water +heat -> potassium + X}$. $\ce{X}$ is potato with reduced potassium. I am more ...
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Chemical reaction of bronze tarnishing

Can anyone explain to me the chemical process of bronze tarnishing? According to Wikipedia: Bronzes are typically ductile alloys, considerably less brittle than cast iron. Typically bronze oxidizes ...
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1answer
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What's the difference between Zinc Ascorbate and Zinc Gluconate?

I've been looking at a dental product for pets, called MAXI/GUARD Oral Cleansing Gel and it states it uses zinc ascorbate/taurine, however in the ingredients I found elsewhere it instead lists zinc ...
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What is the chemical formula of ghee? [closed]

What is the chemical formula of ghee (Indian butter)? Also, name the elements present and state the number of their atoms.
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How to use NMR readings to determine the molecular structure of a compound? [closed]

A question in my exam came as follows: How is NMR used in the determination of structure of organic compounds? I have studied NMR spectroscopy and I know how to determine values using an NMR ...
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Kinetics of Decomposition of Hydrogen Peroxide [duplicate]

Consider the decomposition of Hydrogen Peroxide: $$\ce{H2O2 -> H2O + 1/2O2}$$ The rate law for this reaction is : $$\text{Rate} = k[\ce{H2O2}]$$ Further $$\text{Rate} = -\frac{\mathrm d[\ce{H2O2}]}...
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What is one formula unit? [duplicate]

I am really sorry if this is a beginner question but please still help me. In this website, which explains balancing chemical equations mentioned the word formula unit here: $\ce{3Ca(NO3)2}$ (just ...
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1answer
57 views

Sucrose skeletal formula - missing Carbon and Hydrogen [duplicate]

I was reading the Wikipedia article about Sucrose, when I noticed that the skeletal formula was missing some $\ce{C}$ and $\ce{H}$ atoms. The chemical formula being $\ce{C12H22O11}$, I counted the $11$...
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Lewis structures and chemical-compound formulas [closed]

In the Lewis structures listed below, M and X represent various elements in the third period of the periodic table. Write the formula of each compound using the chemical symbols of each element: a. b. ...
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What is the chemical formula for the synthesis of Hydroxyapatite (Ca10(PO4)6(OH)2)?

This might be a basic question but I am a little confused. I have some lecture notes that says calcium phosphate ($\ce{Ca3(PO4)2}$) reacts with calcium hydroxide ($\ce{Ca(OH)2}$) to form ...
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What is the correct formula for iodonium ion?

Previously, I have made a comment on user @Maurice's response to a question where he enquired about the existence of $\ce{I3+}$. I cited a paper1 which said that $\ce{I3+}$ is (apparently?) called ...
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Separating Silica from silicates [closed]

Does anyone know how one could extract Silica $\ce{SiO2}$ from a one or more of the following compounds in either ground or powder forms? Plagioclase: $\ce{Ca2Al2Si2O8}$ Pyroxene: $\ce{(Ca,Mg,Fe)...
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I am having trouble with this question on net ionic equation [closed]

Convert into molecular equation: The reaction between potassium dichromate, ferrous sulphate and sulphuric acid:- Cr2O7^2- + 14H^+ + 6Fe^2+ ---> 6Fe^3+ + 2 Cr^3+...
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Compounding Polyphenol Sulfonic Acid (Negatan)?

Looking for formulation of Polyphenol Sulfonic Acid (Negatan). Any additional steps on how to make it would be helpful. This site references it, but the ingredients shown account for roughly 45% ...
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The equation representing the dissolution of cycasin [closed]

Is the following equation correct? $$\ce{{C_8H_{16}N_2O_7}_{(s)} + H2O_{(l)} <=> {C_8H_{16}N_2O_7}_{(aq)}}$$
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What is the materials science behind thermal diffusion in multispectral camouflage?

I've been interested in infrared and near-infrared camouflage (called multispectral camouflage) for a couple of days now, and I've found a video or two of certain companies that have created fabrics ...
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What's the effect of Pressure change in Chemical Equilibrium if any reactant or product is Solid or Liquid?

I am studying La-Chatelier's Principle of Chemical Equilibrium. I got a problem of Pressure change in Chemical Equilibrium. I know that Pressure change If a reversible reaction is in equilibrium ...
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1answer
532 views

Empirical and molecular formula

I was doing a homework assignment and I got the question wrong because I was supposed to multiply the empirical formula of $\ce{C6H10S2O}$ by 3 to get the molecular formula. I put $\ce{(C6H10S2O3)3}...
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534 views

Chemical formula of a compound crystallized in a cubic lattice

Question In a cubic lattice of $\ce{XYZ},$ $\ce{X}$ atoms are present at all corners except one corner which is occupied by $\ce{Y}$ atoms. $\ce{Z}$ atoms are present at face centres. What is the ...
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1answer
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Ratio of copper(II) ions to EDTA?

What is the ratio of copper(II) ions to EDTA in a $\ce{[Cu(EDTA)]^{2-}}$ complex? I know that EDTA forms up to 6 coordinate bonds with the central atom, but is that what they are asking for with "...
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Can two positive ions be next to each other in a formula?

Let's say I want to find the oxidation numbers of the atoms in a chemical formula. For example: In $\ce{H3AsO3}$, Oxygen has a $-2$ charge. They're $3$ of them, so its $-6$ Hydrogen has a $+1$ ...