A 28.57 gram sample of X contains how many moles? (Assume that the molar mass of X is 25.77 grams per mole.) Report your answer to three decimal places.

Q: A 12.35 g sample of aluminum hydroxide contains how many mol of hydroxide ions?

A:

Q: What is the unit conversion required to convert 10.00g of gold to moles?

A: Molar mass of a substance means mass of one mole of a substance and it is equal to the atomic or…

Q: empirical formula of the compound? List the elements in standard order for carbon compounds:

A:

Q: Aluminum has the density of 2.70g/cm3 . How many moles are in a 13.2cm3 block of the metal…

A: At the standard temperature and pressure conditions, density of a substance is given by:

Q: determine the quantity of moles in 4.21 x 1023 molecules of CaCl2. List the steps clearly. Use…

A: Given,  molecules of CaCl2 = 4.21 x 1023 molecules

Q: Determine the mass, in grams, of 0.445 moles of Mn (1 mol of Mn has a mass of 54.94 g). with the…

A: The amount of moles in a substance can be determined by using its Molar mass. The molar mass is the…

Q: What is the average mass of the tin in the sample?

A: It is a given a mass spectrum of tin which has 3 peaks at 116 with 27% abundance and 118 with 58%…

Q: What is the mass of the sample?

A: Formula :-  q = mc∆T  Where : q = heat enery  m = mass of sample  c = specific heat of the sample…

Q: The average nicotine (C10H14N2) content of a Camel cigarette is 1.93 mg. Suppose an individual…

A:

Q: The percent by mass of oxygen in C3HsO is %. (Enter your answer to four significant figures.)

A: Percent mass of an element in a compound can be calculated by using the following formula: Percent…

Q: ow many moles in 56g carbon dioxide

A: To determine the number of moles in 56g carbon dioxide.

Q: A bottle of a tile cleanser contains 135 g of HCl and 775 g of water. What is the percent by mass of…

A: Generally the mass percent is determined by using following expression.

Q: Which has more mass, a mole of potassium or a mole ofsodium? Explain your answer.

A: The atomic mass of the element is equal to the sum of the number of protons and neutrons present in…

Q: How many moles of NO, are in 9.1x1024 molecules of NO2? Round your answer to 1 decimal place. Your…

A: The number of molecules = 9.1 × 1024

Q: How many moles are in 105 g of K? Use 2 decimal places in your molar mass for the calculation.…

A: Mass of K (potassium) = 105 g  And as molar mass of K (potassium) = 39.09 gmol-1   Use formula for…

Q: Calculate the number of moles in each sample. 74.9 g H2CCl2   n(H2CCl2)=??

A: Given, 74.9 g of dichloromethane.

Q: According to the following reaction: Fe203 (s) + 2AI (s) → Al203 (s) + 2Fe (s) What would you…

A:

Q: greatest percentage by mass of

A:

Q: One mole of helium contains less molecules than 1 mole of Argon true or false?

A: Explanation as follows

Q: What is the mole ratio of all the substances represented in this figure?

A: A mole ratio can be described as ​the ratio between the amounts in moles of the any two compounds…

Q: percent of carbon dioxide in the sample?

A:

Q: What is the mass of 83.89 moles of X? (Assume that the molar mass of X is 27.78 grams per mole.)…

A:

Q: Does one mole of K and one mole Ti have the same amount or a different amount of atoms? Explain your…

A: Avogadro number = 6.02×1023

Q: 10. Calculate the mass of one mole of glucose (C,H,,O).

A: Given that , Substance = glucose (C6H12O6) moles = 1 mol Now we know molar mass of glucose=…

Q: Percent yields are generally calculated from mass quantities.Would the result be the same if mole…

A: Interpretation- To explain with reason for the result of calculating percent yield using mole…

Q: How much does 19.11 moles of X weigh in grams? (Assume that the molar mass of X is 28.84 grams per…

A: Data given, Number of moles of X = 19.11 moles  Molar mass of X = 28.84 grams/mole

Q: How many moles are in 100.0 g of gold? Show your calculations and answer with unit.

A: Given: Mass of Gold= 100 g To Calculate: Moles of Gold

Q: Determine the molar mass of Ca(OH).. Provide an answer to two decimal places.

A: General chemistry.

Q: Determine the formula weight of NH,CI. Provide an answer to two decimal places.

A:

Q: A sample of I2 has a mass of 154g.How mant moles are in the sample of I2

A: Given, mass of I2 = 154 gMoles of I2 can be calculated as:

Q: How many molecules are contained in a glass that holds 250 g of water? How many moles does that…

A: Number of moles is given by the ratio of mass of the substance to that of the molar mass of the…

Q: Determine the mass, in grams, of 0.452 moles of lithium fluoride.  Record your answer to three…

A:

Q: (1 mol 6.02 x 10 atomns)

A: 1 mole = 6.02*10^23 atoms

Q: A sample of a compound is found to contain 21.82 g of carbon, 9.16 g of hydrogen, 20.42 g of oxygen,…

A: Mass of compound is,

Q: A 78.0-g sample of an unknown compound contains 12.4 g ofhydrogen. What is the percent by mass of…

A: Given: Weight of the compound = 78 g Weight of hydrogen = 12.4 g The calculation of the % by mass is…

Q: A student calculated the number of moles of carbon dioxide present in a 100.0 g sample of a gaseous…

A: Mass of sample = 100 g Number of mole of carbon dioxide present in sample = 0.30 mol

Q: How many moles are in 100.0 g of gold? Show your calculations and answer with units.

A: Molar mass of Au = 196.96g Given mass = 100.00 g No. of moles(n) = given massmolar mass

Q: What is the percentage of potassium in a 10 g sample of potassium sulfate? Report your answer to the…

A:

Q: Determine the mass of one mole of sodium chloride.

A: Answer - the basic formula is - In the given question, mole of NaCl given =1. So here, mass = molar…

Q: convert 3 moles of H, to molecules of H,

A: 1 mol = 6.02 x 1023 molecules 1 mol = molar mass

Q: What number of moles of X is needed to obtain 75.36 grams? (Assume that the molar mass of X is 53.31…

A:

Q: During the experiment, a student calculated the mass of chlorine in the compound to be 1.153 g. How…

A:

Q: Determine the molar mass of Li₂CO₃. Provide an answer to two decimal places.

A: Molar mass of a compound is equal to the sum of atomic masses of all the elements.

Q: Determine the molar mass of CH2OH. Provide an answer to two decimal places.

A:

Q: What would you multiply "grams of sodium" by to get the units "moles of sodium"? grams Na x (number)…

A: Element Sodium (Na) The molar mass of sodium Na=23 mole per gram.

Q: In the gaseous state chlorine exists as a diatomic molecule Cl2 (molar mass=70.9g/mol). Calculate…

A: Given that in In the gaseous state chlorine exists as a diatomic molecule Cl2 (molar mass=70.9g/mol)…

Q: How many grams are present in 17.82 moles of X? (Assume that the molar mass of X is 40.38 grams per…

A: Given, Molar mass of X = 40.38 g/mol Moles of X = 17.82 moles Mass of X = ?

Q: Determine the molar mass of CH;OCH3. Provide an answer to two decimal places.

A: The molar mass of dimethyl ether is 46.06 g/mol.

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.