How can one find the percent abundance of an atom when 3 isotopes and the average atomic mass are given? How to find the number of neutrons in an isotope What is the mass of 1 mol of atoms for an element? Explain the role of relative weight in determining the atomic mass of an eleme...
Understand what the formula unit mass is, how to find molecular mass, and exercise calculating molecular mass in some example problems. Related to this QuestionHow many pounds (lbs) are in 1.42 x 102 Mg (megagrams)? How much material would you weigh to make one liter of the follo...
More specifically, a mass spectrometry method called GEMMA is used to determine PDI and MMD of PEG samples which provides more accurate measurements for high molecular weight PEG samples than prior known MALDI-TOF analysis.ケンプトナー, ジャスミン...
1. 1.12 dm3 of a gas at STP is found to weigh 3.55 g. Find the molecular weight and vapor density of the gas. 2. 5.6 dm3 of a gas at STP weighs 11 g. Find out its relative molecular mass and vapor den If the ratio of the rate of diffusion of two gases is 1:3, then wh...
where M is the molar mass, m is the mass of solution, and n is the number of moles. This returns a value for M in kg/mol (in SI units). This is also closely related to the molecular weight/molecular mass and the it is used to find the mass or nu...
Grams to Moles Step 1 Find the number of gramsof the substance. You will know from the problem how many grams and what the substance is, for example, 12 g of water. Step 2 Find the molecular weight of each atom in the substance. The molecular weight is how much each molecule of the...
(Note: the molecular weight of NaCl is 58.44 g/mol.) This time, the solute has a valence of 2, as NaCl separates into Na+ and Cl-. The equation to get mEq is therefore [(30 mg)(2)]/(58.44 mg/mmol) = 1.027 mEq. Since there are 400 mL = 0.4 L, the concentration in mEq/L...
A driver might be found to have a level of 0.15, for example, while the legal limit is 0.08. To comprehend how we can gain access to such precise numbers, we have to ask ourselves: how does a breathalyzer work? What do those figures mean? And how do police officers find out if ...
How to use a balance to find the mass of an object? Explain. How do you calculate force from mass? What can be measured in grams and tells how much matter an object contains? You make the following measurements of an object: 42 kg and 22 m3. What would the object's density be?
Themolecular massor molecular weight is the total mass of a compound. It is equal to the sum of the individual atomic masses of each atom in the molecule. It's easy to find themolecular massof a compound with these steps: Determine themolecular formulaof the molecule. Use the periodic tabl...