An analytical chemist weighs out 0.141 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. She then titrates this solution with 0.1100 M NAOH solution. When the titration reaches the equivalence point, the chemist finds she has added 21.7 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits.

Q: Define the terms: mole, molar concentration, molecular mass in your own words

A: Mole is a number that is 6.022 × 1023.

Q: What are the major sources of error in determination of the molar mass?

A: Major sources of errors in determination  of molar mass is as follows: 1) Errors in measurements due…

Q: if 0.274 moles of a substance weigh 62.5 g, what is the molar mass of the substance in units of…

A: 1 mole = 6.022×1023 [ Avogadro's number ] The mass of one mole of molecules of a substance is called…

Q: Determining Molar Mass I The molar mass is mass of one mole of the compound. To determine the molar…

A:

Q: Calculate the molar mass of each substance. (show solution) H3PO4 CaCO3 (NH4)2SO4 C4H9O2

A: Molar mass means the masses of all the atoms in the moleculeadded together.

Q: How many moles of KI are in 1.22×10241.22×1024 formula units?

A:

Q: What is the mass, in g, of Avogadro's number of nickel atoms? Enter your answer in the provided box.

A: We know that,  1 mole of any element consist of 6.022*1023 atoms.

Q: A 1.7500 g sample of a zinc compound ("ZnX") contains 0.8400 g of zinc. What is the molar mass of…

A: Given the mass of the unknown compound, ZnX = 1.7500 g Given the formula of the unknown compound is…

Q: determine the molar mass of a substance if 0.385 moles have a mass of 152 g

A: Molar mass of a substance in the mass of  1 mole of that substance

Q: Calculate the grams of sulfur in 8.022x1025 formula units of Lithium sulfate

A: The mass of formula unit of a substance is defined as the sum of atomic masses of all the atoms in a…

Q: A compound is found to contain 42.88 % carbon and 57.12 % oxygen by mass. What is the empirical…

A: Given: Percent mass of carbon = 42.88 % Percent mass of oxygen = 57.12 % Molar mass of C = 12 g/mol.…

Q: binary compound of carbon and hydrogen has the following percentage composition: 85.63% carbon,…

A:

Q: The empirical formula of a compound O has no relation to the molecular formula. O can be used to…

A:

Q: 1.How many moles is 28.10 grams of hydrochloric acid [HCl]? 2. How many moles is 2.71x1023 formula…

A:

Q: sodium chloride is 60.66% chlorine by mass. calculate the empirical formula of soduim chloride.

A: An empirical formula represents the simplest whole-number ratio of the atoms present in the…

Q: How many molecules are in the sample? 87 g CCl4 Express your answer using two significant figures.

A: Number of moles can be calculated as follows: No. of moles = MassMolar massNo. of moles = 87g153.82…

Q: three

A:

Q: (f) A certain pure compound containing element E is analyzed. The elemental composition of the…

A: The objective of this question is to determine the empirical formula of a compound given the number…

Q: What is the empirical formula for this compound?

A: Given :-  Percentage composition of C = 27.29 %  Percentage composition of O = 72.71 %  To determine…

Q: Molar mass==Mass of 1 mol of substanceMass of 6.022×1023 particles of substanceMolar mass=Mass of 1…

A:

Q: A scientist experimentally determines the mass percents of an unknown where C = 76.0%, H = 12.7% and…

A: Given C = 76.0%, H = 12.7% and O = 11.3%.

Q: Determine the molar mass of a substance if 0.360 moles has a mass of 152 g.

A: The given moles of substance is 0.360 moles. The given mass of substance is 152 g. The molar mass of…

Q: The mass fraction of an element present in a compound can be obtained by comparing the mass of the…

A: Mass fraction of an element is defined as the total mass of the element to the total mass (molar…

Q: 22) An 85.5-g sample of Hg in a barometer 23) A 0.251-g Ti metal heart valve 24) A 10.0-g sample of…

A: 22) Given: Mass of Hg = 85.5 g Atomic mass of Hg = 200.59 g/mol.

Q: calculate the mass of 800. atom of iron (Fe)?

A: Molar mass = Mass of 1 mole  1 mol = 6.022 x 1023 atoms

Q: A sample of a pure compund contains 3.04g of nitrogen and 6.94 g of oxygen. The molar mass of this…

A: Since the compound is having only N and O  Hence assuming the compound to be having empirical…

Q: Determine the empirical formula of a compound that is 49.5% 5.2 % H, 16,5% O and 28.9% N. Then…

A: Compound that is 49.5% C, 5.2 % H, 16,5% O and 28.9% N having actual molar mass of  194 g / mol.…

Q: What is the mass, in g, of Avogadro's number of aluminum atoms? Enter your answer in the provided…

A: Avogadro's number = 6.0224 x 1023 = 1 mole Mass of Avogadro's of an element = Molar mass of the…

Q: How many N atoms are present in 1.11 · 10-2 mol of LiNO3 formula units? Express your answer in…

A:

Q: A compound was decomposed and determined to be 51.27 % C, 7.75% H and 40.98 %O  by mass.  What is…

A: Given  C%   = 51.27 % H     = 7.75 %  O     = 40.98 %  Subscript of Carbon in Empirical Formula   =…

Q: A certain chemical substance has the following percent composition by mass. Element Mass Percent…

A: Supose we have 100 g of given compound   therefore mass of C = 43.45 g  mass of H = 8.02 g  mass of…

Q: Measurements show that unknown compound X has the following composition: element mass % carbon 62.6%…

A:

Q: A compound has the following elemental analysis: Element % composition C 48.65 H 8.11 O 43.24…

A: Element %  of  C = 48.65 % = 48.65 gElement %  of  H = 8.11 % = 8.11 gElement %  of  O = 43.24 % =…

Q: Molar Masses A = 17.813- mole D = 41.486- mole E = 33.011- mole Y = 19.280 X = 255.691 mole Z =…

A: Given that -  Molar masses of elements are -  A = 17.813 g/mole D = 41.486 g/mole E = 33.011 g/mole…

Q: Using the equation: n = , calculate the EXPERIMENTAL molar mass. Molar mass

A:

Q: Calculate the mass in grams of each of the following samples. (Remember from class that the…

A: Given, a. moles of potassium chromate = 0.251 mol b. moles of lithium perchlorate = 1.51 mol c.…

Q: A compound is found to contain 7.808 % carbon and 92.19 % chlorine by mass. What is the empirical…

A: Empirical formula is defined as simplest or most reduced whole number ratio of atoms present in a…

Q: What units would you put under “molar mass” and “Avogadro’s number”on this diagram?

A: The given flowchart suggests that grams i.e. weight can be easily converted to moles using the molar…

Q: Define percentage by mass

A: Percentage by mass is defined as the ratio of mass of solute by mass of solution (solute+solvent)…

Q: Calculate the number of moles of the indicated substance for each of the following samples.…

A:

Q: Determine the molar mass of a substance if 0.300 moles has a mass of 152 g.

A:

Q: How many moles in 43.1 g carbon?

A: Molar mass of C is 12g/mol. Means 12 grams  of carbon is equals to 1 mole of C.

Q: A common salt has the following formula:  XCl2◦6H2O.  The compound is 29.8% chlorine, 40.4% oxygen…

A: See the written solution.