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How do you calculate the molecular formula of a substance which contain 80 percent C and 20 percent H?
You can only calculate the empirical formula because you do not have a mass of this compound given. To do the empirical formula assume 100 grams and change percent to grams. Get moles.
80 grams Carbon (1 mole C/12.01 grams) = 6.66 moles C
20 grams hydrogen (1 mole H/1.008 grams) = 19.84 moles H
the smallest becomes 1 in the empirical formula and the other number is divided by it, Thus; H/C
19.84 moles H/6.66 moles C
= 2.9, which we call 3
so,
CH3
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is the empirical formula
To get the molecular formula tour question needed to read; How to calculate molecular formula from such ans such mass of compound with these percentages of elements, Which, of course, your question did not provide.
Then you would have divided that given mass by the mass total of the elements of the empirical formula, got a whole number by which you would have multiplied the numbers of your empirical formula to get molecular formula.
What else can I help you with?
How do you calculate milli equivalent?
To calculate milliequivalents (mEq), you use the formula: mEq = (mg of the substance / molecular weight) × valence. First, determine the mass of the substance in milligrams and its molecular weight (in grams per mole). Then, divide the mass by the molecular weight to find the number of moles, and multiply by the valence (the number of charges the ion carries) to convert to milliequivalents. Remember to adjust the units by multiplying by 1,000 to express the result in milliequivalents.
How do you calculate density using a formula?
Density of a substance = (mass of a sample of the substance) divided by (volume of the same sample)
What is the Molecular formula for NO2?
NO2 is the molecular formula for NO2.
If the formula to calculate work is distance divided by time how do you apply the formula?
You would have a very tough time, because that isn't the formula to calculate work. (distance) divided by (time) is the formula to calculate speed. The formula to calculate work is: (force) multiplied by (distance).
What two variables are multiplied together to calculate mass?
To calculate mass, you multiply the volume of an object by its density. The formula is mass = density × volume. This relationship allows you to determine the mass of a substance if you know how much space it occupies and how dense it is.
Which substance shows a substance that is not molecular?
A formula unit.
Which formula show a substance that is not molecular?
A formula unit.
Can you determine the molecular formula of a substance from its percent composition?
Not completely. The empirical formula of a substance can be determined from its percent composition, but a determination of molecular weight is needed to decide which multiple of the empirical formula represents the molecular formula.
Can one substance have same empirical and molecular formula?
Yes, it is possible for a substance to have the same empirical and molecular formula. This can occur when the substance is composed of only one type of element, such as oxygen gas (O2), where both the empirical and molecular formula are O2.
How to calculate empirial formula from molecular formula?
To calculate the empirical formula from a molecular formula, divide the subscripts in the molecular formula by the greatest common factor to get the simplest ratio of atoms. This simplest ratio represents the empirical formula.
What is the molecular formula of silver?
Ag is the molecular formula for silver. If you look on a periodic table, you will find this substance with the transitional metals and with the atomic number of 47.
How many micromoles is 20 micrograms?
To convert micrograms to micromoles, you need to know the molecular weight of the substance. The formula to convert micrograms to micromoles is: Micromoles = (micrograms / molecular weight) If you provide the molecular weight of the substance, I can help you calculate the number of micromoles in 20 micrograms.
How do you calculate ppm from molecular weight?
To calculate parts per million (ppm) from molecular weight, you first need to know the mass of the substance in grams per mole. Then, you can use the formula: ppm = (mass of substance in grams / total mass of mixture in grams) * 10^6. This will give you the concentration of the substance in parts per million.
How do you calculate density from molecular weight?
Density can be calculated from molecular weight using the formula density = (molecular weight) / (molar volume). Molar volume is the volume occupied by one mole of the substance and can be calculated using the ideal gas law or experimental data. Dividing the molecular weight by the molar volume gives the density of the substance.
What is identity of a substance?
The identity of a substance (chemical compound) is defined by his chemical formula and molecular structure.
What steps are used to convert an empirical formula into a molecular formula?
By determining the molecular mass, then dividing the molecular mass by the formula mass of the empirical formula to determine by what integer the subscripts in the empirical formula must be multiplied to produce the molecular formula with the experimentally determined molecular mass.
How do you calculate Molecular formula from empirical formulaWhat could you do with that information to determine that the empirical and molecular formulas are related to one another by a factor of 6?
In order to find molecular formula from empirical formula, one needs to know the molar mass of the molecular formula. Then you simply divide the molar mass of the molecular formula by the molar mass of the empirical formula to find out how many empirical formulae are in the molecular formula. Then you multiply the subscripts in the empirical formula by that number.
