Google TDEE calculator. Take 10% off as that's how much energy is spent on digestion which you aren't doing. Times by your number of fasting days. Divide by 3,500 (calories in pound of fat). That will get you a rough estimate. If the scale shows anything substantial above or below this then it's water fluctuation.
To calculate the RFM, all you have to do is add up the RAM of of all the atoms present in the formula. Most candidates do not have a problem calculating RFM until they meet an example involving water of crystallisation. The Mole . The mole is a measure of the AMOUNT OF SUBSTANCE; One mole (1 mol) is the amount of substance that contains 6x10 to the 23 particles (atoms, molecules or formulae ...
The empirical formula of a compound represents the simplest whole-number ratio between the elements that make up the compound. This 10-question practice test deals with finding empirical formulas of chemical compounds. A periodic table will be required to complete this practice test. Answers for the test appear after the final question:
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Study Section 3- Equations, Calculations and Electrolysis P1 flashcards from Aj Capewell's Brinelease class online, or in Brainscape's iPhone or Android app. Learn faster with spaced repetition.
Free Chemistry calculator - Calculate chemical reactions and chemical properties step-by-step This website uses cookies to ensure you get the best experience. By using this website, you agree to our Cookie Policy.
Jan 17, 2020 · Dr. Stephen Skowron, Postdoctoral Research Assistant at University of Nottingham who carried out the calculations for Re2 bonding, said: "Bonds between metal atoms are very important in chemistry ...
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It is emphasised that the RFM does not itself calculate. the vibrational level populations; these have to be sup-plied by the user, generally from a dedicated non-LTE model. 6.1 4. B linear in ...
Jun 28, 2017 · It depends on which oxide of copper you want to find. There are two primary oxides of copper, with copper in the 1+ and 2+ oxidation states: "Cu"_2"O" and "CuO". "Cu"_2"O" (copper(I) oxide) We can use the periodic table, specifically the atomic masses of the elements, to figure out the atomic mass or molar mass of any compound, provided we know the chemical formula.
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  • The most common, and so the most useful, equation is Moles = mass/RFM
  • The relative formula mass is calculated by adding up all the different atomic masses of the atoms present. The mass needs to be multiplied by the number of atoms
  • (RFM). [NB The symbol for RFM is still M r! “M r” is used for both RMM and RFM!] The value for RFM is calculated in exactly the same way that the value for RMM is calculated e.g. if we wanted to calculate the RFM for CaCO 3, we would look up the RAM for 1 atom of Ca/the RAM for 1

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Calculate RAM of an element using information on the relative abundances of its isotopes. Calculate the RFM of a compound and the percentage by mass of an element in a compound. What is the mass of...

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Method 1: Calculating the mass from amount (i.e. the number of moles) Mass of substance (g) = Amount (moles) x RFM (Mr) Worked example: Water (H20) with a molar amount of 0.5 RFM hydrogen = (1 x …

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This is a very primitive exact mass calculator. Given the formula of a chemical species, the calculator determines the exact mass of a single isotope of that species and the relative abundance of that isotope. The isotope selected has the property that each atom in the species is the most abundant isotope of that element.

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This online chemistry calculator may be used to calculate root mean square velocity, mean velocity (a.k.a average velocity) and median velocity. Gaseous molecules follow a Maxwell-Boltzmann distribution which is depends on the applied temperature and the molecular weight of the gaseous molecules.


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I mainly used Mole=Mass/RFM. Both sides add up to 242 so i think i have done this correctly (the 72L, the hydrogen has a RFM of 1, there is a double hydrogen so the RFM would be 2 and since Mass = Mole * RFM, 2 * 3 = 6g. 236 + 6 = 242 and also 54 + 80 + 108 = 242)

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EniG. Chemistry Assistant - VisualBasic scientific calculator for fast calculations of molecular weight, quadratic equations, quantity of chemicals for preparations of solutions and statistic analysis of experimental data. EniG. Change Code Page - converts web pages between different standards, eg. from windows-1250 in to ISO-8859-2 or UTF-8.

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Chemical m,athematics.doc/unit 1 worksheets Questions Calculate the percentage by mass of (a) sulphur and oxygen in SO 3 (b) magnesium and nitrogen in Mg 3N 2 3. Calculation of the number of moles in a given mass of a compound. Worked examples (a) Calculate the number of moles in 5.61g of potassium hydroxide, KOH.

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Free Chemistry calculator - Calculate chemical reactions and chemical properties step-by-step This website uses cookies to ensure you get the best experience. By using this website, you agree to our Cookie Policy.

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Calculate the relative formula mass of NH4Fe(SO4)2.xH2O and the value of x.

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Jan 27, 2015 · Since you already figured out, that there is a one-to-one ratio of carbonate to carbon dioxide, you can simply write n (C O X 2) = n (M X 2 C O X 3). With the formula for the Molar mass, M (M X 2 C O X 3) = m (M X 2 C O X 3) n (M X 2 C O X 3),

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Theoretical amount of FeS = 0.05 x RFM = 0.05 x 88 = 4.4g % yield = actual amount of chemical obtained x 100. maximum theoretical amount = 4.1 x 100 = 93.2% (to 1dp) 4.4 Note that we can use calculations of this sort to predict the . maximum yield. of a product from a given amount of starting materials.

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The relative formula mass (Mr), sometimes written RFM,is the sum of the Relative Atomic Masses of all the atoms in the substance’s formula. The units of relative formula mass are g/mol. (We’ll see why later) e.g. The formula for water is H2O. What is its Mr? Add the Relative Atomic Masses of the atoms involved:

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The indicators of the traditional RFM model characterize user features from three angles: recent purchase time (R), purchase frequency (F), and total consumption amount (M). The user group and scenarios studied in this paper are different from the previous literature: (1) the user group is relatively fixed, (2) the consumer goods are relatively ...

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Ideal Gas Law Equations Calculator Science Physics Chemistry Formulas. Solving for ideal gas density. Inputs: pressure (P) specific gas constant (R specific) temperature (T) Conversions: pressure (P) = 0 = 0. pascal . specific gas constant (R specific) = 0 = 0. joule/kilogram-kelvin . temperature (T) = 0 = 0. kelvin . Solution: density (ρ) = NOT CALCULATED. Other Units: Change Equation Select ...

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Calculate the molar mass of Mg(NO3)2 in grams per mole or search for a chemical formula or substance. Molecular weight of Mg(NO3)2. Metric System; Date Calculator; Salary Calculator; Molecular Weight ; Discussion Forum ›› Mg(NO3)2 molecular weight. Molar mass of Mg(NO3)2 = 148.3148 g/mol. This compound is also known as Magnesium Nitrate. Convert grams Mg(NO3)2 to moles or moles Mg(NO3)2 to ...

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- calculate the moles moles = mass/RFM = 7.980/(63.5+32.1+64) = 0.05 moles = 4.495/(2+16) = 0.25 moles - divide by the smallest moles ... 1.3e use chemical equations to calculate reacting masses and vice versa using the concepts of amount of substance and molar mass AND 1.3f use chemical equations to calculate volumes of gases and vice versa using the concepts of amount of substance and molar ...

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Relative Fat Mass (RFM) Calculator. Estimates body fat index and classifies the body status from underweight to obese, based on the ratio of height and waist measurements. Refer to the text below the tool for more information about the RFM. Purpose Key Facts Contents.

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21.18: Titration Calculations Last updated; Save as PDF Page ID 53948; Titration Calculations; Summary; Contributors and Attributions; The manufacture of soap requires a number of chemistry techniques. One necessary piece of information is the saponification number. This is the amount of base needed to hydrolyze a certain amount of fat to produce the free fatty acids that are an essential part ...

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Mass Spectrometry. Mass Spectrometry is a process by which the atomic mass of atoms or molecules is determined. It can be used to find relative isotopic abundance, atomic and molecular mass, and the structure of a compound.

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Chemical Calculations and Moles. GCSE chemistry equations, formulae and calculations are often the part of the syllabus that many students struggle with. From understanding avagadro's contact, to mole calculations, formula's for percentage yield and atom economy, at first this part of the GCSE chemistry syllabus seems very difficult. However, with plenty of revision, memorising of the ...

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The addition of a sodium ion to a chloride ion to form sodium chloride is an example of a reaction you can calculate this way. Ionic sodium has an enthalpy of −239.7 kJ/mol, and chloride ion has enthalpy −167.4 kJ/mol. Sodium chloride (table salt) has an enthalpy of −411 kJ/mol. Inserting these values gives:

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Chemistry; Calculations, moles and yield; GCSE; AQA; Created by: oliviajade26; Created on: 26-04-18 18:15; What is relative formula mass? The relative atomic masses of all the atoms in the molecular formula added together. 1 of 19. What is the formula for percentage mass of an element in a compound? RAM x (number of atoms of that element) / (RFM of the compound) x 100. 2 of 19. What is the ...

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Density calculations allow us to evaluate the behaviors of gases of unknown volume. We can determine the density of an ideal gas using knowledge of three properties of the evaluated ideal gas. This reformulation of the Ideal Gas Equation relates pressure, density, and temperature of an ideal gas independent of the volume or quantity of gas. Key Terms. density: a measure of the amount of matter ...

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Free Chemistry calculator - Calculate chemical reactions and chemical properties step-by-step This website uses cookies to ensure you get the best experience. By using this website, you agree to our Cookie Policy.

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Mr Sean Chua, recommended O-Level Pure Chemistry and IP Chemistry Tutor with 19 Yrs Teaching Experience and Ten Years Series (TYS) Book Author shares in his Sec 4 Chemistry Tuition Class about the Concentration of Solutions in Mole Concept and Chemical Calculations.

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Mole ↔ Mass chemistry calculations. OCR Gateway chemistry. STUDY. PLAY. Show the rearrangement triangle used to do mole ↔ mass calculations. cover what you want read what's left mol = mass x rfm mass = mol/rfm rfm = mole/mass. Calculate the mass of 16 moles of calcium carbonate (CaCO₃). 1600g. Calculate the number of moles in 39g of water. 2.17 . Calculate the number of moles in 75g of ...

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Ideal Gas Law Equations Calculator Science Physics Chemistry Formulas. Solving for ideal gas density. Inputs: pressure (P) specific gas constant (R specific) temperature (T) Conversions: pressure (P) = 0 = 0. pascal . specific gas constant (R specific) = 0 = 0. joule/kilogram-kelvin . temperature (T) = 0 = 0. kelvin . Solution: density (ρ) = NOT CALCULATED. Other Units: Change Equation Select ...

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we would calculate the RFM as follows: List the elements that are present in the compound, as read from the formula: H x 2. O x 1. Find the . atomic mass. of each element from the periodic table, and multiply this mass by the number of atoms of each element present: H x 2 = 1 x 2 = 2. O x 1 = 16 x 1 = 16 . Add up the total of the masses involved to give the RELATIVE FORMULA MASS. RFM = 2 + 16 ...

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Calculate the concentration of the solution. A= concentration = mass/ volume. 350/3 = 116.67g/dm3 (1 mark) Number of moles = mass/ molar mass. 116.67/58.4 = 1.99 or 2.0 mol/dm3 (1 mark) (2 marks) Use of amount of substance in relation to volume of gases Q9: Equal amounts of gases in moles occupy the same volume under the same conditions of

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Feb 22, 2018 · A homework sheet with 20 RMM to work out, it does require a periodic table. Ranges from easy to very hard. Let me know if there is a typo please. Answer sheet now up

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››More information on molar mass and molecular weight. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

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to calculate RFM we multiply the relative atomic mass (top number in box on periodic table) by the number of atoms in a formula (small number to the bottom right of an element in an equation) and then add the results if more than one element is present in the formula Click again to see term 👆 1/27 OTHER SETS BY THIS CREATOR

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The relative formula mass (Mr), sometimes written RFM,is the sum of the Relative Atomic Masses of all the atoms in the substance’s formula. The units of relative formula mass are g/mol. (We’ll see why later) e.g. The formula for water is H2O. What is its Mr? Add the Relative Atomic Masses of the atoms involved: VCE Chemistry, Relative atomic mass, isotopes, VCE Chemistry atomic mass. VCE Chemistry. Home Unit 1 > > > > ... •Calculate mass of 1 atom of Carbon 12. •Use the following data: •Mass of 1 proton = 1.67 x 10^-24 g •Mass of 1 neutron = 1.67 x 10^-24 g •Mass of 1 electron = 9.11 x 10^-28 g •Mass of 1 atom of carbon 12 = 6 x 1.67 x 10^-24 + 6 x 1.67 x 10^-24 + 6 x 9.11 x 10^-28 g = 2 ...
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Calculate the heat evolved/absorbed given the masses (or volumes) of reactants. Hess's Law. In the last section, we have seen how we can use calorimetry to determine the enthalpy of chemical reactions and the results of experiments is tabulated and found readily on the web and textbooks. However, the heat of some reactions cannot be figured directly through calorimetry. Hess's Law states that ...The relative formula mass of a substance made up of molecules is the sum of the relative atomic masses of the atoms in the numbers shown in the formula. Relative formula mass has the symbol, Mr. To...


Google TDEE calculator. Take 10% off as that's how much energy is spent on digestion which you aren't doing. Times by your number of fasting days. Divide by 3,500 (calories in pound of fat). That will get you a rough estimate. If the scale shows anything substantial above or below this then it's water fluctuation.