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What experimental evidence about a new compound must be known before its formula can be determined?
Wiki User
∙ 13y ago
In a laboratory the mysterious compound is initially weighted and then will undergo reactions to be broken down into its constitutes. The individual elements or other compounds will be determined and then be weighed. Using information known on those elements and compounds, scientist will be able to discover the molar mass for each of them. Using the equation n = m/ M (mols = mass over (divided by) molar mass) they are able to determine the moles for each of the elements/compound.
the unknown compound will be determined by the product with the lowest number of moles (closest to zero) have its number dividing all the other products (see it as for each mole of that element/compound there will be a requirement of N amount of moles from the other product(s)). This result will give the ratios for the constitutes in the unknown compound (the subscripts). This formula here will be the empirical formula (which may not be the actually formula for the reaction, it is the simplest ratio).
Let the unknown compound be X. A and B are the resulting constitutes of X.
After determining the correct mols of A and B where B moles is closest to 0, we divide Amols by Bmols and the resulting number is near a whole number. This number will be the subscript for A and will determine the empirical formula of X. If Bmols = 1 and Amols = 2 the unknown compound will have the empirical formula of A2B.
Wiki User
∙ 13y ago
Wiki User
∙ 12y ago1.you must know the molecular weight
2.compute the ratio of molecular weight to formula weight
3.multiply all subscripts in the empirical formula by this ratio
Wiki User
∙ 12y agoThe elements in the compound, the proportions between or among the elements present, and the molecular weight of the compound.
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What is the name of the covalent compound BH3?
Mass?Here it is with an example.. a compound of 78.14% Boron and 21.86% hydrogen with an experimental mass of 27 to 28 g. The empirical formula is as above BH3and Molecular formula is B2H6Molar mass / by empirical formula mass should give you an integer to multiply the empirical formula (BH3) with. This time it was 2 (rounded).
Is the formula NH4Br a molecular compound?
No; the compound with the formula NH4Br is an ionic compound.
Which best describes an empirical formula?
the lowest whole number ratio of elements in a compound A+
Is the formula of a compound ionic?
The formula is not ionic or covalent, the compound itself is.
The formula of the compound potassium dihydrogen phosphate is?
The formula of this compound is KH2PO4.
The formula weight of a compound is determined by adding up the individual weights of every what in that compound?
the formula weight of a compound is determined by adding up the individual weights of every atom in the compound. For example the formula weight of Magnesium Bromide (MgBr2)= 24 + 2(80) = 184
The formula weight of a compound is determined by adding up the individual weights of every in that compound.?
atom lulz
What is the molecular formula of the compound CH2 with molar mass = 42.0?
The molecular formula of a compound can not be determined solely based on its molar mass. In this case, without additional information, it is not possible to determine the molecular formula of the compound CH2.
How do you identify the number of elements in a compound?
The number of elements in a compound can be determined by looking at the chemical formula and identifying each element's symbol. For example, the compound CO2 has two elements, carbon and oxygen. Another example, glucose, has the formula C6H12O6, and has three elements, carbon, hydrogen, and oxygen.
What is the name of the covalent compound BH3?
Mass?Here it is with an example.. a compound of 78.14% Boron and 21.86% hydrogen with an experimental mass of 27 to 28 g. The empirical formula is as above BH3and Molecular formula is B2H6Molar mass / by empirical formula mass should give you an integer to multiply the empirical formula (BH3) with. This time it was 2 (rounded).
Is the formula NH4Br a molecular compound?
No; the compound with the formula NH4Br is an ionic compound.
What is the formula for nickel(II) ion?
The compound nickel (II) nitride consists of a nickel ion with a +2 charge and a nitride ion with a -3 charge. Since this compound is neutral, the charges must balance. Consequently, it can be determined that the formula of nickel (II) nitride is Ni3N2.
What can be determined using a chemical formula. A. the elements that make up the compound B. the pH of a solution C. the boiling point of a compound D. the substances that make up a solution?
A. Almost completely positive.
The formula weight of a compound is determined by adding up the individual weights of every?
Element in the compound. Example: H2O = 18 O= 16 H= 1 2X1 = 2 16+2=18
What formula represents a molecular compound?
Organic formula is a formula that shows an organic compound and its molecular arrangement.
What represent a molecular compound?
This is the chemical formula (empirical formula) or the formula unit of this compound.
Which best describes an empirical formula?
the lowest whole number ratio of elements in a compound A+
