How many moles of Kr are there in 39.3 grams of Kr?

Q: Tin, element 50 on the periodic table, has 10 stable isotopes. 117^Sn makes up 7.687% of naturally…

A: Using the formula moles of Sn117 is calculated as,

Q: Calcium chloride is 36.11% calcium. How many grams of calcium are present in 2.55 x 103 g of calcium…

A: The mass percent of the calcium in calcium chloride is = 36.11 % The mass of calcium chloride is =…

Q: What is the mass grams that are in 5.76 × 10²⁵ molecules of I₂?

A: Number of moles = Number of molecules/(6.0224 x 1023) Mass = Number of moles x molar mass

Q: It is estimated that we breathe around 5.0 x 1021 molecules of 0, in a single breath. What mass of…

A: Given: Molecules of O2 in a single breath = 5.0 × 1021. Molar mass of O2 = 32 g/mol

Q: How many grams of potassium are in 2.91 g potassium sulfide?

A: Given :- mass of K2S = 2.91 g  To calculate :- mass of K (in g)

Q: How many moles of Al are there in 41.5 grams of Al?

A: Since number of moles of atom = mass of atom / Atomic mass of atom

Q: What is the mass (in grams) of 8.10 x 1023 molecules of C6H12O6 ? Remember to report proper number…

A: In multiplication and division we report final answer to least significant figures in available…

Q: What is the mass in grams of 2.01 x 1022 atoms of mercury?

A: • The values provided in the question are:-         i) Number of mercury atoms = 2.01 × 1022 atoms…

Q: What is the mass of 2.00 × 10 ^ 19 molecules of CCl4?

A: Given the number of molecules of CCl4 are --- 2.00×1019 molecules What is the mass of this given…

Q: The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of…

A: Molar mass of any element is equal to the atomic mass of that element in the unit of grams. Molar…

Q: What is the mass in grams of 4.2 x 10^22 atoms of Zn ?

A:

Q: How many grams of aluminum are there in 4.05 x 10²5 molecules of Al½O3?

A: Given:- number of molecules of Al2O3 = 4.05 × 1025 molecules  To calculate :- mass of Al in grams

Q: A sample of a compound with the molecular formula C20H24N2O2 contains 2.75 x 1024 nitrogen atoms.…

A: Molar mass of any substance is the mass of one mole of the substance, which is expressed as g/mol.…

Q: What is the mass, in grams, of 2.08 × 1024 aluminum (Al) atoms?

A: The question is based on mole concept. We have to determine mass of aluminium present.

Q: How many grams of oxygen are there in 58.0 grams of HClO2?

A: 1 molecule HClO2 has 2 atoms of oxygen. The molar mass of HClO2 is 68.46 g/mol. The molar mass of…

Q: How many moles of NH3 are there in 1.93 grams of NH3?

A: No. Of moles = gram weight / molar mass Molar mass of NH3 = 17

Q: Find the mass (in grams) 7.7 X 10 molecules of NO,

A: Given :-  Number of molecules of NO2 = 7.7 x 1023 molecules  To calculate :- mass of NO2 in grams

Q: How many grams of F2 are there in 1.84 mol F2?

A: Given, Moles of F2 = 1.84 mol

Q: What is the mass (grams) of 6.52 x 1018 atoms of gold (Au)?

A: Given that, 6.52×1018 atoms of gold. We have to calculate the mass of that gold. Concept:  We know…

Q: What is the mass of 3.5 × 10 22 molecules of CO 2

A:

Q: How many grams of gold (Au; atomic mass = 197.0 g/mol) contains 2.5 x 1020 gold atoms?

A: Number of moles = mass/molar mass  Mass = moles × molar mass  Molar mass of Au = 197.0 g/mol

Q: How many moles of white phosphorus, P4, are in 98.40 g?

A: Molecules are made up of two or more than two atoms.We have been given white phosphorus, P4 and we…

Q: Determine the mass in grams of 2.31 × 10²¹ atoms of chromium. (The mass of one mole of chromium is…

A: The relation between mass and number of atoms:                                    Mass(g)molar…

Q: How many grams are there in 1.22 x 1034 molecules of chromium (VI) oxide?

A: Mole of a substance or a mole of a particles is defined as exactly 6×10^23 particles which may be…

Q: How many moles of Cu are there in 83.6 grams of Cu?

A: The number of moles is a chemical unit which is mathematically expressed as: N=MMM…

Q: How many grams are in 1.2 × 1024 atoms of carbon

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to…

Q: How many grams are in 9.3 x 1020 atoms of Lead?

A: Applying concept of mole and avogadro concept.

Q: How many moles are there in 68.57 grams of water, H2O?

A: Given,  The mass of water, H2O = 68.57 grams The moles of H2O present in this mass is:

Q: Find the mass (in grams) in 4.4 X 1023 molecules of CH,

A: Molar mass of CH4 = 16.04 grams Molecules of CH4 in 1 mol = 6.023× 1023

Q: What quantity in moles of potassium atoms do you have if you have 3.50 x 1024 atoms of potassium.…

A:

Q: How many atoms of each element (C, H, O) are present in 12.6 g of C12H22O11?

A:

Q: Determine the mass in grams of 4.38 × 10²¹ atoms of chromium. (The mass of one mole of chromium is…

A:

Q: What would be the mass, in grams, of 1.505 x 1023 molecules of carbon disulfide?

A:

Q: Determine the mass in grams of 4.78 × 1021 atoms of chromium. (The mass of one mole of chromium is…

A: The number 6.023 × 1023 indicates the number of atoms or molecules in a mole of any substance is…

Q: how many grams are in 4.46 x 10 24 atoms of carbon?

A: Number of carbon atoms present = 4.46 x 1024 Atomic mass of carbon is 12 grams Atomic mass means the…

Q: How many molecules of NaOH are there in 20.0 grams of NaOH?

A: Atoms are made up of electrons, protons and neutrons. Protons are positively charged particles,…

Q: what quantity in moles of potassium do you have if you have 5.70 x 10^22 atoms of potassium. ( the…

A: The number of molecules or atoms present in the one mole of the substance is equal to the Avogadro…

Q: What mass of Na2CO3 would contain 2.50 x 1025 sodium (Na) atoms? Express your answer in units of…

A:

Q: How many molecules of C2H6 are there in 21.4 g of C2H6?

A:

Q: Determine the mass in grams of 3.92 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is…

A:

Q: 1. How many molecules are there in 150 g of C12H22O11?

A: Given :-we have to find how many moleculerare there in 150 gm of C12H22O11

Q: Determine the mass in grams of 5.30 × 10²¹ atoms of chromium. (The mass of one mole of chromium is…

A: 1 mole of a substance equal to  6.022×1023 atoms which is Avogadro’s number. Thus, the gram value of…

Q: What quantity in moles of potassium atoms do you have if you have 3.50 x 1022 atoms of potassium.…

A:

Q: How many moles and atoms of 40K are there in 3.29g 40K?

A: The mass of 40K is = 3.29 g The molar mass of 40K = 39.964 g/mol Moles of 40K is =? The number of…

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.