The true value of a compound’s molar mass is 176.082 g/mol. You do an experiment and determine the molar mass to be 177.85 g/mol. What is the % error?

Q: (a) Find the mean molar mass determined by these workers.  (b) Find the median molar mass (c)…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: The ratio of each element's mass in a compound changes when the size of the sample changes.

A: In this question we have to tell that above statement is true or false with explanation.

Q: The percent copper in an unknown copper compound is 21.60 %. What is the formula weight of the…

A: Given,percentage of Cu=21.60%Molar mass of Cu=63.5g/mol

Q: 77. A binary compound of boron and hydrogen has the following percentage composition: 78.14% boron,…

A: Determination of empirical formula The percentage composition of elements present in given compound…

Q: How many hydrogen atoms are in 92.62 g (NH4)2SO4?

A:

Q: b) In a second experiment to verify the value of x, the pharmacist heated a 3.752g sample of the…

A: Given, mass of sample of lysine hydrate =3.752 g mass of sample after heating =  3.278 g

Q: What is the molar mass of cholesterol if 0.00105 mol weighs 0.406 g? Express your answer using three…

A: The general formula required to calculated molar mass from moles and mass is as follows,…

Q: What is the molar mass of sodium bicarbonate, in g/mol? Your answer should have the appropriate…

A: We have to find molar mass of sodium bicarbonate. Atomic mass of sodium = 22.99g/mol Atomic mass of…

Q: The molar mass of a compound was determined to be 23.99 g/mol. If the sample contains 3.2 mol, then…

A:

Q: In order to convert the number of particles of a substance into the number of grams of that…

A: 1 mole of any substance contain Avogadro's number6.022×1023 mol-1 of particles.Again 1 moles of a…

Q: Explain the concept of "counting by weighing" using marbles as your example.

A: The concept of "counting by weighing" using marbles are explained below.

Q: Balance the following chemical reaction. Enter the sum of the balanced coefficients as your answer.…

A: Balancing chemical equations makes sure each element in reactants and product sides are in an equal…

Q: Phillip the freshman chemistry student was stirring his salt during heating. If some of the hydrated…

A: Given : Some mass of anhydrous salt is removed in the rod.

Q: Using the moles of zinc and I− that reacted, compute the number of iodides per zinc ion in zinc…

A: Zinc ions combines with iodide ions to form zinc iodide which is a white powder.

Q: order to convert the number of particles of a substance into the number of grams of that substance,…

A:

Q: What is the molar mass of acetic acid, in g/mol? Use two decimal places in atomic masses. Only give…

A: Given , molecule : acetic acid

Q: Calculate the number of atoms in 12.45 grams of iron. 1.342 x 1023atoms 1.342 x 1022toms 0.223 atoms…

A: Given information, Given mass of iron = 12.45 g Molar mass of iron = 55.845 g/mol Calculate : Number…

Q: What is the empirical formula of a compound whose percentage composition is found to be 2.20%…

A: Lets assume that the total mass of compound = 100 g

Q: What is the number of mole for 4.3 g of CH4? please only type the answer without the unit Answer:

A:

Q: sample weight is potassium ferrioxalate find the Theoretical Mass % of Fe3+Equivalence

A: We have to find the Theoretical Mass % of Fe3+

Q: 5.000 gram sample of hydrated beryllium carbonate, BeCO3·xH2O is heated according to the procedure…

A: To calculate the number of moles of H2O and BeCO3.

Q: Which of the following is incorrect: Assay is the process of determining how much of a given sample…

A: We will choose the incorrect answer from the following statement.

Q: Chromium metal is obtained by heating chromium(III) oxide with carbon. Calculate the mass percent of…

A:

Q: Convert magnesium from mass to moles, and then find the molar mass of mg. Mass in grams of Mg…

A: Moles of magnesium can be calculated as follows:

Q: How many moles of oxygen atoms are in 5.3E-1 moles of CO? Only give the numeric value of your…

A:

Q: Calculate the n factor of 0.25 N Cupric Chloride.

A: The n-factor defines the number of the moles of the electrons exchanged (gained or lost) by 1 mole…

Q: How many C atoms are present in 8.94 · 1020 CH3C(O)H molecules? Express your answer in scientific…

A: Scientific notation is way to express the numbers that are too big or small to be written…

Q: What are the units for molar mass? Group of answer choices A) g B) g/L C) g/mol D) g/mL

A: The molar mass is defined as the mass of a sample of that compound which when  divided by the amount…

Q: 81.77 moles of methane to molecules

A: Given: Moles of methane = 81.77 mol.

Q: Calculate the number of atoms in 12.45 grams of iron . 1.342 x 1023atoms 1.342 x 1022toms 0.223…

A: The question is based on mole concept. We have to calculate number of atoms of iron.

Q: Suppose a student measured the mass of a sample that has a known mass of 40.5809 g using an…

A:

Q: 1: How many carbon atoms are present in a mole of ¹2C? 12 Express your answer using four significant…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Experimentally a chemist determined the molecular weight of the compound aniline to be 94.45 a/mol.…

A: A question based on percentage error in the determination of molecular weight, which is to be…

Q: Calculate the moles of ammonium nitrate used in the experiment.

A: Moles: Moles is the amount of atoms, molecule present in species. One mole consists of 6.022 x 1023…

Q: What is the identity of the sample?

A: Here we are required to identify the sample

Q: Calculate the molar mass of a compound if 0.393 mole of it has a mass of 252.0 g. Be sure your…

A:

Q: A compound contains arsenic and oxygen as the only elements. A 1.626 g sample of the compound…

A:

Q: What is the molar mass of the following compound? Include the mass to 2 decimal points without…

A:

Q: During a lab to calculate the molar mass of an unknown substance where the answer was a little…

A: There are many factors which can increase the molar mass of unkonwn substance. 1) mass can be…

Q: Calculating and using the molar mass of diatomic elements A chemist determines by measurements that…

A: Explanation given as follows

Q: Up late, a (tired) engineer calculated the molar mass of nitroglycerin (C3H5N3O9) to be 196.2 g/mol,…

A: Nitroglycerin = C3H5N3O9  Molar mass of nitrohlycerin = 196.2 g/mol  Percent error = ?

Q: For each of the following antibiotics, determine how many moles of each compound are present for the…

A: Tinidazole = (C₈H₁₃N₃O₄S)  Mass of tinidazole = 358.4 g Molar mass of tinidazole = 247.27g/mol…

Q: The compound NHxNO3 contains 5.04% hydrogen by mass. What is the value of x? Enter your response as…

A: Given  % Hydrogen =  5.04 %  formula of compound  = NHxNO3 Value of x = ?

Q: Part C Now that we have put coefficients of 3 in front of CaSO4 and CaCl2, what coefficient should…

A: Given, 3 CaSO4  +  AlCl3                       3 CaCl2  +  Al2(SO4)3     Required,…

Q: Is NaNO2 polyprotic

A: Answer: Species those give H+ ions in their solution are called as acid and species those accept H+…

Q: Calculate grams P in 97.6grams barium phosphate.

A: Given :- mass of barium phosphate = 97.6 g To calculate :- mass of P (in g)

Q: A student determines the molar mass of a compound to be 145g/mol. If the theoretical value is…

A:

Q: A 2.33 mole sample of a substance weights about 137 grams. What is the substance

A: 137/2.33 = 58.79  Nearly equal to the mass of NaCl.

Q: binary

A:

Q: Calculate the average molar mass of acetic acid based on your experimental results. Round your final…

A: Given: Concentration of acetic acid solution = 2.40 g/L   Trial-1 Trial-2 Initial buret reading…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.