# How do you calculate RFM in chemistry?

Relative atomic masses can be used to find the relative formula mass of a compound. To find the relative formula mass (M r) of a compound, you add together the relative atomic mass values (A r values) for all the atoms in its formula.

## What is the difference between RFM and molar mass?

The molar mass of a molecular substance is equal to its relative molecular mass (Mr) in grams. The molar mass of an ionic compound is equal to its relative formula mass (Mr) in grams.

## What is the RFM of CO2?

Examples: Carbon Dioxide (CO2) – Has 1 carbon and 2 oxygens, C=12 O=16, Ar = 12 + (16 x 2), Mr= 44.

## What is the RFM of NaCl?

Reveal answer. RFM (NaCl)= (23.0 + 35.5) = 58.5.

## What is the RFM of iron?

This esteemed body of chemists recommends an atomic mass for iron of 55.845(2) u.

## Do you include big numbers in RFM?

The large numbers in the equation show the ratio in which the substances react and are produced. Masses should be multiplied by these numbers.

## What is the RFM of h2so4?

Thus, the molar mass of sulfuric acid H 2 SO 4 is. 0758 g mol – 1 .

## How do you calculate percent by mass?

To calculate the mass percent of an element in a compound, we divide the mass of the element in 1 mole of the compound by the compound’s molar mass and multiply the result by 100.

## How do I calculate moles?

1. The formula for the number of moles formula is expressed as.
2. Given.
3. Number of moles formula is.
4. Number of moles = Mass of substance / Mass of one mole.
5. Number of moles = 95 / 86.94.

## What is the RFM of Fe2O3?

Iron (III) Oxide formula = Fe2O3. 2x Iron (III) = 56 * 2 = 1123x Oxygen = 16 * 3 = 48. 48 + 112 = 160. Fe2O3 relative formula mass = 160.

## How do you convert from moles to grams?

1. Calculate how many moles are mentioned in the question.
2. Find the molar mass of the substance.
3. Multiply both the values.

## What is iron’s normal phase?

Iron is a chemical element with symbol Fe and atomic number 26. Classified as a transition metal, Iron is a solid at room temperature.

## How do you interpret RFM analysis?

1. Recency. How recent was the customer’s last purchase?
2. Frequency. How often did this customer make a purchase in a given period?
3. Monetary. How much money did the customer spend in a given period?

## How do you interpret RFM scores?

What is a good RFM score? The best RFM score is the one with the highest values for each variable. If a store uses a 1 to 5 scale for recency, frequency, and monetary, with 5 being the highest, then the perfect RFM score is 555.

## What is the purpose of RFM?

Recency, frequency, monetary value (RFM) is a marketing analysis tool used to identify a firm’s best clients based on the nature of their spending habits.

## How do you determine normality?

1. Normality = Number of gram equivalents × [volume of solution in litres]-1
2. Number of gram equivalents = weight of solute × [Equivalent weight of solute]-1
3. N = Weight of Solute (gram) × [Equivalent weight × Volume (L)]
4. N = Molarity × Molar mass × [Equivalent mass]-1

## Why is H2SO4 called an acid?

Sulfuric acid or H2SO4 is made by burning sulfur in the presence of oxygen. It has a strong acidic property and is corrosive in nature. Was this answer helpful?

## What is the relative formula mass of NaOH?

The molar mass of NaOH is 39.997 g/mol .

## What is a 1 mole?

A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

## How many moles are in molarity?

Molarity is the concentration of a solution in terms of the number of moles of the solute in 1 dm3 (1 liter) of the solution. What are the units of molarity? The units of molarity are M or mol/L. A 1 M solution is said to be “one molar”.

## How is Fe2O3 formed?

How is Fe2O3 formed? Iron (III) oxide, or ferric oxide, is the product that is formed when iron undergoes oxidation. This can be prepared in the laboratory by electrolyzing a sodium bicarbonate solution, an inert electrolyte, with an iron anode. The resulting hydrated iron(III) oxide, is dehydrated at around 200 °C.

## How do you calculate Fe from Fe2O3?

The most efficient method is to use Mossbauer spectroscopy which can directly analyse and distinguish Fe2+ and Fe3+. To get FeO to Fe2O3 just multiply FeO by 1.11111 Fe2O3 to FeO is just reverse, divide Fe2O3 by 1.11111 (or multiply by 0.89998).

## How many atoms are in Fe2O3?

The compound Fe2 O3 contains five atoms in each molecule of the compound.