1. What is the molar mass of the following elements? a) B b) Zn c) He

Q: Determine the molar mass of a substance if 0.310 moles has a mass of 152 g.

A: Given :- number of moles of substance = 0.310 mol  Mass of substance = 152 g  To calculate :-  Molar…

Q: 1) When the sample is first put into the crucible and heated, the directions say to heat gently for…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Convert a reacting amount of 0.346 mol of sodium sulfate into mass in grams.

A: Given, 0.346 mol of sodium sulfate

Q: Calculate the molar mass of sodium sulfite

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Q: How many moles are in 33.51 g of He?

A: Mole is unit of amount. Moles are defined as unit specifying number of atoms in a substance.

Q: What quantity in moles of KBr are in 51.6 grams of KBr?

A: Given     Mass of KBr     =  51.6 gram  Number of mole =   ?

Q: A ballon originally has a volume of 0.750 and 0.0335 moles of helium and then has 0.0560 moles of…

A: Given  Initial volume of He gas , V1 = 0.750 L Initial moles of He gas , n1 = 0.0335 mol Final moles…

Q: Calculate the molar mass of potassium carbonate.

A: The compound given is potassium carbonate i.e K2CO3.

Q: What is the molar ratio of calcium chloride and potassium hydroxide?

A: Given To know the molar ratio of calcium chloride and potassium hydroxide.

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: How many grams of LiOH are in 6.21x1024 formula units of LiOH?

A: Given that, Number of formula units, i.e, number of particles of LiOH = 6.21 x 1024 particles We…

Q: How many grams of LiOH are in 6.21x1024 formula units of LiOH?

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

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

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Q: Question:  Calculate the number of moles in: 0.50 g sodium bromide (NaBr)

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

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Q: 5. A compound is determined to contain 49.5% carbon, 5.15% hydrogen, 16.5% oxygen and the rest…

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Q: 0.274 moles of a substance weighs 62.5 g.  What is the molar mass of the substance?

A: No.of moles= mass(g)/molarmass(g/mol)  i.e  n = w/M  Where   n = 0.274 mol  w = 62.5 g  M = ?

Q: How to solve: Calculate the mass of 1.00×1024 (a septillion) molecules of water.

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Q: According to the following reaction: CO (g) + H2O (l)  CO2 (g) + H2 (g) What would you multiply…

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Q: Convert 0.0121 mol of carbon to grams. 0.0121 mol =

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Q: What is the difference between molarity, molar and grams?

A: The ratio of number of moles of solute to the volume of solution in liters is known as molarity. The…

Q: If 7.32 1023 molecules of a substance have a mass of 6.82 g, what is the molar mass of the…

A: In this question, we will determine the molar mass of the substance.  Given that,  Number of…

Q: An unknown compound is 40.0% C, 6.7% H, and 53.3% O by mass, and has a molecular molar mass of 120…

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Q: molar mass

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Q: A large organic molecule has a mass of 1.41 * 10-21 kg. What is the molar mass of this compound?

A: Given that, Mass of organic molecule= 1.41×10-21 kg Molar mass is given by the following formula…

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.