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What information is needed to calculate the percent composition of a compound?
The formula of the compound and the Atomic Mass of its elements.
What is the molecular formula of the compound ch2 with molar mass equals 168 gmol?
c12h24
The gram-formula mass of no2 is defined as the mass of?
The gram-formula mass of a compound is the sum of the atomic masses of all the atoms in a formula unit of the compound. For NO2, the gram-formula mass is calculated by adding the atomic mass of nitrogen (N) and two times the atomic mass of oxygen (O).
Which of the following best describes how molecular mass and formula mass are related to the mass of a compound?
Molecular mass refers to the sum of the atomic masses of the atoms in a molecule, while formula mass is the sum of the atomic masses of the elements in a formula unit of an ionic compound. Both molecular mass and formula mass are measures of the mass of a compound, with molecular mass specifically for molecules and formula mass for ionic compounds.
How do you know when to solve for a empirical formula?
You should solve for an empirical formula when you are given the percent composition of elements in a compound or when you have the molar mass of the compound but not the molecular formula. The empirical formula provides the simplest whole-number ratio of atoms in a compound.
Does The element with the largest subscript in a formula have the largest percent by mass in the compound?
Not necessarily. The element with the largest subscript doesn't always have the largest percent by mass in a compound. The percent by mass of an element in a compound is determined by its atomic mass and the total molar mass of the compound.
What has the largest formula mass LiCl NaCl KCl MgCl2.?
MgCl2 has the largest formula mass among the given compounds. This is because the formula mass of a compound is the sum of the atomic masses of all the atoms in a formula unit, and magnesium (Mg) has a greater atomic mass than lithium (Li), sodium (Na), and potassium (K).
How does molecular mass and formula mass are related to the mass of a compound?
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What are the sum of atomic masses of all atoms formula for a compound called?
The sum of atomic masses of all atoms in a compound is called the molar mass. It is calculated by adding up the atomic masses of all the atoms present in the compound based on the molecular formula.
What is gram formula mass?
The mass of a mole of an ionic compound.
What is the formula for the percent by mass of a compound?
((mass of element)/(mass of compound))*100
What information is needed to calculate the percent composition of a compound?
The formula of the compound and the Atomic Mass of its elements.
Is the element with largest atomic mass always present in highest percentage by mass in a compound?
No, the element with the largest atomic mass is not always present in the highest percentage by mass in a compound. The percentage by mass of an element in a compound is determined by its atomic mass and the total mass of the compound. The composition of a compound can vary based on the number of atoms of each element present.
What is the molecular formula of the compound ch2 with molar mass equals 168 gmol?
c12h24
What is the mass percent of oxygen in the compound?
To determine the mass percent of oxygen in a compound, you would calculate the mass of oxygen in the compound and then divide it by the total mass of the compound, before multiplying by 100. The formula is: (mass of oxygen in compound / total mass of compound) x 100%.
Does the mass of each element in a compound depend on the amount of compound?
No, the mass of each element in a compound is fixed and does not change with the amount of compound. The mass of each element is determined by its molar mass and the chemical formula of the compound.
How do you find molecular fomula?
To find the molecular formula of a compound, you need to know its empirical formula and molar mass. Divide the molar mass of the compound by the molar mass of the empirical formula to find the "multiplication factor." Multiply the subscripts in the empirical formula by this factor to get the molecular formula.
