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Mp is a standard unit of measurement in chemistry, used to measure different elements in a compound. [1] X Research Source Normally, compound mass is given in grams (g) and should be converted to mp. The conversion is quite simple, however, we still need to follow some important steps. By applying below method, you can convert gram to mp easily.
Steps
Calculate molecular mass
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Prepare the necessary materials to solve math problems. When you have enough tools, you will solve the problem more easily. The things you need are:
- Pencil and paper. Calculations are easier when you put everything on paper. You need to present all the steps to get the maximum score.
- Periodic table of chemical elements: used to determine the atomic mass of elements.
- Pocket calculator: used to calculate complex numbers.
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Determine which elements in the compound you need to convert to mp. The first step in calculating the molecular mass is to identify the elements that make up the compound. This is quite easy because the abbreviations for the elements are only one or two letters long.
- If a substance is abbreviated with two characters, the first letter will be capitalized and the second letter lowercase. Example: Mg is the abbreviation for the element magnesium.
- The compound NaHCO 3 consists of four elements: sodium (Na), hydrogen (H), carbon (C) and oxygen (O).
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Determine the number of atoms of each element in the compound. You need to know the number of atoms of each substance in a compound to calculate the molecular mass of that compound. [2] X Research Source The small number next to an element’s initials represents the element’s atomic number.
- For example, the compound H 2 O has two hydrogen atoms and one oxygen atom.
- If a compound is written in parentheses, followed by a subscript, it means that each element in the parentheses is multiplied by that index. For example, the compound (NH 4 ) 2S consists of two N atoms, eight H atoms and one S atom.
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Write down the atomic mass of each element on paper. Using the periodic table is the easiest way to find the atomic mass of an element. Once you locate the element on the periodic table, you’ll see the atomic mass just below the element’s symbol.
- For example, the atomic mass of oxygen is 15.99.
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Calculate the molecular mass. The molecular mass of a substance is equal to the number of atoms of each element times the atomic mass of that element. [3] X Research Source This quantity is essential in converting grams to mp.
- First, multiply the number of atoms of each element in the compound by the atomic mass of that element.
- Then add the masses of the elements in the compound together.
- Example: Molecular mass of compound (NH 4 ) 2 S = (2 x 14.01) + (8 x 1.01) + (1 x 32.07) = 68.17 g/mp.
- Molecular mass is also known as mp mass. [4] X Research Sources
Convert grams to mp
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Set up the conversion formula. To find the number of mp of a substance, we divide the number of grams of a compound by its mass mp. [5] X Research Sources
- Formula : number of mp = mass (grams) / mass mp of compound (grams/mp)
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Substitute the data into the formula. After setting up the appropriate formula, the next step is to substitute the numbers you calculated into the formula. If you want to make sure that the data is in the correct place, you can check by suppressing the unit. If after simplification the remaining unit is mp then you have set it up right.
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Solve the equation. Using a calculator, divide the mass by the molecular mass of the substance or compound. The quotient will be the number of mp of the substance or compound you are looking for.
- For example, the problem gives 2 g of water (H 2 O) and asks you to convert to mp. We have a mass mp of H 2 O of 18g/mp. Divide 2 by 18, so you have 0.1111 mp H2O.
Advice
- Don’t forget to include the element or compound name with the answer.
- If you are asked to present an assignment or test, make sure you show your answer clearly by circling or drawing a box around the answer.
Things you need
- Chemical periodic table
- Pencil
- Paper
- Computer
- Chemistry problem
X
wikiHow is a “wiki” site, which means that many of the articles here are written by multiple authors. To create this article, volunteer authors have edited and improved the article over time.
This article has been viewed 35,154 times.
Mp is a standard unit of measurement in chemistry, used to measure different elements in a compound. [1] X Research Source Normally, compound mass is given in grams (g) and should be converted to mp. The conversion is quite simple, however, we still need to follow some important steps. By applying below method, you can convert gram to mp easily.
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