How do you convert empirical formula to molecular? | Socratic
WEBJun 23, 2014 — The empirical formula mass of CH₂O is 30.03 u. The molecular mass of 180 u must be some multiple of this number. n = 180 u 30.03 u = 6.0 ≈ 6. ∴ The molecular formula = CnH 2nOn = C₆H₁₂O₆. Hope this helps. Answer link. You use the molar mass or molecular mass of a compound to convert its empirical formula to a molecular formula.
How do you calculate molecular weight of DNA? - Socratic
WEBAug 13, 2016 — Calculate the molar mass of the fragment. The average mass of a base pair is 650 u. Hence, the mass of the fragment is. 3176bp × 650 u 1bp = 2.06× 106lu. and the molar mass is 2.06 ×106lg/mol. Here are the steps you might follow. Step 1. DNA restriction If you have a large DNA molecule, you will probably cut it into smaller fragments using a ...
How can I find the molecular formula from molar mass?
WEBOct 7, 2014 — You start by determining the empirical formula for the compound. Determine the mass in grams of each element in the sample. If you are given percent composition, you can directly convert the percentage of each element to grams. For example, a molecule has a molecular weight of 180.18 g/mol. It is found to contain 40.00% carbon, 6.72% …
How do I determine the bond angle in a molecule? | Socratic
WEBDec 30, 2013 — There are three basic steps to determining the bond angles in a molecule: > 1. Write the Lewis dot structure for the molecule. Assume that you must determine the bond angles in "BF"_3. "B" is less electronegative than "F", so "B" becomes the central atom. If we have three "F" atoms, that means that we are going to use all three electrons from …
Condensed Structure - Organic Chemistry - Socratic
WEBA molecular formula tells only the numbers of atoms of each element in a molecule of the compound. A condensed structure shows all atoms, but it omits the vertical bonds and most or all of the horizontal single bonds. For example, both ethanol and dimethyl ether have the molecular formula #"C"_2"H"_6"O"#.
Mole Ratios - Chemistry - Socratic
WEBSolution. Step 1: Convert all masses into moles. 1.20g Al × 1 mol Al 26.98g Al = 0.044 48 mol Al. 2.40g I₂ × 1 mol I2 253.8g I₂ = 0.009 456 mol I2. Step 2: Calculate the molar ratios. To calculate the molar ratios, you put the moles …
How to find the molecular formula of an unknown substance?
WEBMay 18, 2018 — The molecular mass must be an integral multiple of the empirical formula mass. MM EFM = 90.03u 30.03u = 3.00 ≈ 3. The molecular formula must be three times the empirical formula. MF = (EF)3 = (CH2O)3 = C3H6O3. The molecular formula is C3H6O3. Answer link. The molecular formula is "C"_3"H"_6"O"_3 > We must calculate the …
How do you calculate the number of moles from volume?
WEBJan 8, 2014 — It depends on the substance whose volume you know. > If you have a pure liquid or a solid, you use its density to calculate its mass and then divide the mass by the molar mass. If you have a solution, you multiply the molarity by the volume in litres. MOLES FROM VOLUME OF PURE LIQUID OR SOLID There are two steps: Multiply the volume …
What is the relationship between density and molecular ... - Socratic
WEBFeb 1, 2016 — Explanation: The density D is calculated by: D=m/V. The relationship between the mass m and the molecular weight MM is the following: n=m/ (MM)=>m=nxxMM, where, n is the number of mole of the substance in question. Therefore, D= …
How do you calculate molecular weight of a gas? | Socratic
WEBJun 3, 2016 — P V = m M M RT. therefore, the molecular mass expression can be written as: M M = mRT P V. Thus, to find the molecular mass of a gas, we can measure its pressure, volume, mass and temperature. MM= (mRT)/ (PV) To find the molecular mass of a gas, we can assume it behaves ideally and use the ideal gas law: PV=nRT We can modify this …