How many moles of gold (Au) are in 2.1 × 10−10 g of gold?

Q: What is the mass (in g) of 2.91 x 1028 atoms of Fe?

A: Given: Number of Fe atoms = 2.91 × 1028 atoms.

Q: What is the mass, in grams, of 8.52 × 10 15 atoms of gold present in one nanoparticle?

A: given, atoms of gold present in one nanoparticle = 8.52 × 10 15 atoms the molar mass of gold, Au =…

Q: How many moles of carbon tetrachloride are in 6.58 x 1022 molecules of carbon tetrachloride?

A: 1 mole of CCl4 contains 6.023 × 1023 molecules.

Q: How many moles are there in 825 of Al(OH)3?

A: We have given   825 g  of  Al(OH)3  Molar mass of Al(OH)3 (M) = 27 + 3(16+1)            M = (27 +…

Q: What is the mass in grams of 4.11 x 1025 molecules of O,?

A: Given :- number of O2 molecules = 4.11 × 1025  To calculate :- mass (in grams)

Q: 3. How many moles are there in 2.22 x 10ª g of (NH4)2SO4?

A:

Q: How many moles are in 187 grams of C,Hg(OH)2?

A: Number of moles = mass/molar mass

Q: How many moles of iron are present in 3.15 x 1024 atoms of iron?

A: One mole of any substance is equal to 6.023 x 1023 units of that substance ( such as atoms, ions, or…

Q: Determine the quantity of moles of hydrogen in 3.06 x 103g of glycine, C:H$NO:?

A: The number of moles is calculated as: Moles=Given massMolar mass......(1) The molar mass of glycine…

Q: 12. If that hamburger contains 3.1 x 10 moles (or 0.000 000 31 moles) of selenium, how many grams of…

A: Given, Moles of selenium = 3.1 × 10-7 moles Note: Atomic mass of selenium = 78.96 g/mol Mass (in…

Q: What is the mass in milligrams of (A) 4.95 mol of (NH4)2Ce(NO3)6?

A: Molar mass of  (NH4)2Ce(NO3)6 = 14 x 8 +1x 8  + 140 x 1 + 16 x 18 = 548 g/mol Mass = moles x molar…

Q: What is the mass in grams of 3.5 x 10 24 molecules of water?

A: 1 mole of water is 18.015 g and contains 6.022×1023 molecules of water.

Q: How many grams are in 3.02 x 1021 molecules of nitric acid?

A: Niric acid ⇒ HNO3Molar mass of Nitric Acid = 1 x atomic mass of Hydrogen +1 x atomic mass of…

Q: How many grams are in 7.89 x 10 24 atoms of H2SO4?

A:

Q: What is the mass of 1.8 x 10^21 molecules of O2?

A: given, number of molecules of O2 = 1.8×1021 molecules the molar mass of O2 = 32 gmol-1 avogadro…

Q: Using the average atomic mass, calculate the mass in grams of each of the following samples.…

A: Given information,     4.50 x 103 mol of germanium, Ge

Q: How many moles of zinc, Zn, are in 1.35×10^24 Zn atoms?

A: Question is based on mole concept. We have to calculate number of moles of zinc.

Q: If the molar mass of boric acid, H3BO3, is 61.83 g/mol, how many grams would be contained in 1.32…

A: The answer is given as follows

Q: How many grams of carbon tetrachlorride are in 1.01 x 1024 molecules?

A: Given: Number of molecules= 1.01×1024  To find: Grams of carbon tetrachloride Formula: Number of…

Q: How many atoms would there be in 6.18x106 g of chlorine, Cl2?

A: Given, Mass of chlorine gas (Cl2) = 6.18 × 106 g Number of atoms are there in 6.18 × 106 g of…

Q: How many moles are there in 45.0 grams of sulfuric acid, H2SO4?

A:

Q: How many H atoms are there in (3.80x10^2) grams of H2O?

A: Number of moles = Mass/Molar mass Number of atoms in 1 mole = 6.0224 x 1023 Molar mass of water =…

Q: How many oxygen atoms are in 3.00 g of quartz?

A: We know that 1 mole = 6.023 x 1023  molecule / atom /ions* Chemical formula of quartz= SiO2*…

Q: How many molecules are there in 1.2 moles of Cu (NO3)2?

A:

Q: What is the mass in grams of 1.47 x 1015 molecules of NO?

A: Given : The number of molecules of NO=1.47 x 1015 The molar mass of NO=30.01 g/mol 30.01 g is the…

Q: 8. How many grams are in 2.55 x 1024 molecules of KCI?

A:

Q: How many moles of O are there in 12.4 mol Fe(NO3)3?

A: The question is about Oxygen atoms and not the Oxygen molecule There are 9 "O" atoms in the…

Q: 1) How many moles of cobalt (Co) atoms are there in 6.00 X 10 (6 billion) Co atoms? 2) How

A: We know, 1 mols = 6.022x1023 atoms

Q: The recommended daily intake of salt, NaCl, is about 1 teaspoon = 2.3 g salt.  If the molar mass of…

A: Given  Mass of NaCl  =  2.3 gram  Molar mass of NaCl  = 58.44 gram/mole Number of atom of NaCl = ?

Q: What is the mass in grams of 2.06 x 10²³ atoms of potassium, K?

A: Atoms of potassium = 2.06 × 1023  Molar mass of potassium = 39.1 g/mol  Avogadro's number = 6.022 ×…

Q: How many moles are in 2.3 x 1023 molecules of uranium (IV) fluoride?

A: Molecular  formula of Uranium(IV) fluoride is UF4. Now, according to Avogadro's theory   1 mol…

Q: 7. How many grams are in 2.38 x 1022 molecules of ammonia (NH,)?

A:

Q: 3. How many moles of atoms are there in 180 g of Bromine?

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

Q: How many grams of chromium (Cr) are there in (3.13x10^0) mol of chromium?

A: 1 mol of Chromium weighs 51.996 g.

Q: How many moles are in 1.72 x 1023 molecules of CO?

A: The number of molecules in one mole of a substance is equal to the Avogadro's number.

Q: 8. How many moles of magnesium is 3.01 x 102² atoms of magnesium?

A:

Q: 13) How many moles are there in 4.50 x 1022 molecules of CH,?

A: 13.  Number of particles = 4.50 x 1022 molecules Number of atoms = Number of moles of CH4 x NA Here…

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…

Q: 2.845 x 1012 potassium ions equals how many moles of potassium ions?

A: 1 mol of potassium ions equal 6.022 ×1023ions    16.022×1023moles of potassium ions equal 1 ion

Q: What is the mass grams that are in 6.80 x 1025 molecules of I2 ?

A: Mass of the substance is called molar mass. 1 mole of a substance contains Avogadro's number of…

Q: How many oxygen atoms are in 2.40 g of quartz?

A: quartz :  molecular formula = SiO2 molecular mass = 28 + (2 x 16) g/mol                            =…

Q: 3. How many atoms are in 1.45 g of Ag?

A:

Q: How many grams of Al2(CrO4)3 will contain 5.17 x 1024 oxygen atoms?

A:

Q: What is the mass, in grams, of 9.93 × 10ª molecules of methanol (CH, OH) ? mass: g

A: Answer:- This question is answered by using the simple concept of calculation of moles using number…

Q: What is the mass of 4.36 x 1023 molecules of carbon tetrachloride?

A: No of molecules of CCl4 =4.36 x 1023Molar mass of CCl4  =153.8g

Q: What is the mass in grams of a single atom of Br? x 10

A: Given : Number of atoms of Br = 1

Q: What is the mass in grams of 3.06 x 1015 molecules of CO?

A: 1 mole = 6.022×1023 (Avogadro's number ) The mass of 1 mole of atoms of a molecule is called atomic…

Q: Formaldehyde has the formula CH2O. How many molecules are there in 0.55 g of formaldehyde?

A: The molecular formula of Formaldehyde is CH2O Hence molar mass of CH2O = Atomic mass of C X 1 +…

Q: 4. How many grams are in 1.98 x 1021 atoms of Fe?

A: We have to calculate the mass of Fe.

Q: What is the mass in grams of 3.86 x 1025 molecules of N2?

A: Mole concept :-  1 mole = 6.022×1023 (Avogadro's number)  The mass of 6.022×1023 molecules of a…

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.