The molar mass of a substance is the mass of one mole of that substance. What is the unit of molar mass? A. g/mol B. mol/g C. L/mol D. mol/L 相关知识点: 试题来源: 解析 A。本题考查摩尔质量的单位。摩尔质量是指单位物质的量的物质所具有的质量,单位是克每摩尔(g/mol)。选项 B...
The mass number, often listed after the name of the element to identify the isotope, is a total count of the protons and neutrons in the nucleus.Answer and Explanation: NaCl, also referred to as table salt, does not have a mass number. This is because mass numbers only apply to single ...
The formula mass of sodium chloride is equal to the sum of the atomic masses of sodium and chlorine, which can be found on the periodic table. Formula mass NaCl = 22.9898 + 35.4527 = 58.4425 The number of grams in the molar mass (grams per mole) of any ionic compound is the same...
Ionic compounds, such as sodium chloride (NaCl), may be composed of only one atom each of two different elements, and some covalent gases, such as hydrogen (H2) and oxygen (O2) are composed of two atoms of the same element. Some molecules, particularly those that form with carbon, can ...
Molar Mass Molar mass is the mass of one mole of a substance. We determine the molar masses from values on the periodic table. Answer and Explanation: Before we can sum all of the molar mass of the elements in acetic acid we need the chemical formula of acetic acid. Acetic acid's chem...
What is the molar mass of ethanol? What is the molar mass of caffeine? Calculate the volume of a 0.500 M sucrose solution (table sugar, C12H22O11) containing 0.926 moles of solute. What is the molar mass of HgO? What is the molar mass of NaCl?
For instance, one mole of oxygen has a mass of 15.99g./mol One mole of fluorine gas has a mass of 18.99g/mol. To find the mass of a compound, you must add up the individual masses of its component elements. For example, table salt (NaCl) has two elements. The molar mass of ...
This calculation means that you need one mole of salt. Now, you need to use the molar mass of salt in order to calculate how much you need to weigh out. 1mol(58.44g1mol)=58.44g This calculation means that if you wanted to make a 1 liter solution of 1M NaCl, you would need to ...
one mole). mass(grams) = # of moles x mass(grams)/moles mass(grams) = # of moles x mass(grams)/moles Ex: molar mass of NaCl is 58.5 g/moles. What Ex: molar mass of NaCl is 58.5 g/moles. What is the mass of 3.00 moles of NaCl? is the mass of 3.00 moles of NaCl? 3.00...
Molar Mass & Molarity Molar Mass • Mass in grams of one mole of an element or compound. • Numerically equal to the atomic weight of the element or the sum of all the atomic weights in the formula. • Round all atomic masses to keep 2 decimals. Molar Mass Examples • NaCl =...