How many moles of mercury (Hg) would be found in 250. grams of mercury?

Q: In the chemical formula Mg(NO3)2, the numerical coefficient is equal to…

A: Chemical formula  are representation of molecules or compounds by fixed proportions of elements in…

Q: Suppose 1.00 mole of pennies (each penny is 0.0598 inch thick) is stacked one  atop another to make…

A: 1.00 mole of pennies = 6.023 x 1023 number of pennyeach penny is 0.598 inch thickThus Length of pile…

Q: how many grams of mercury are in 9 moles of mercury ?

A: By using mole concept , number of moles is given as below: number of moles=mass in gMM in…

Q: How many atoms are in .452 moles of carbon? 1.33 x 1024 atoms 2.72 x1023 atoms 3.27 x 1024 atoms…

A: We are having 0.452 moles of carbon , we have to calculate the number of atoms in this much moles of…

Q: An iron atom has a mass of 9.27x10^−23g and a cooking pot has a mass of 0.500kg. What is the mass of…

A: Given: Mass of single iron atom = 9.27 X 10-23 g And mass of cooking pot = 0.500 Kg = 500 g…

Q: how many moles of zinc are present in a 79.5 gram sample of naval brass?

A: Naval Brass is a 60:40 copper zinc alloy to which about 1% of tin has been added to improve the…

Q: How many grams of silicon are present in 2.78 moles of silicon dioxide?

A: Recall the data, moles of SiO2=2.78 moles mass of Si=?

Q: How many moles are in 11.9 grams of argon (Ar)?

A:

Q: Determine the number of oxygen atoms (Units) found in 205 g of potassium sulfate, K2SO4

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

Q: 1.25 moles of PbO2 have a mass of

A: Given  Number of mole of PbO2  = 1.25 mole  Mass = ?

Q: 7. How many particles are present in 0.24 moles of carbon? 5.8 · 1023 particles 2.5 · 1024 particles

A: Mole is the unit of measurement of substances which may be atoms, molecules, ions, or electrons.

Q: How many helium atoms are there in a helium blimp containing 537 kg of helium? Express the number of…

A: Given,Mass of helium = 537 kg                                   = 537 × 103 g     (1 kg = 103 g )…

Q: B How may oxygen atoms are in 225 g of oxygen gas? 4.23 x 102+ b. 6.84 x 10²4 8.47 x 10²4 1.69 x…

A: To calculate the number of oxygen atoms in 225 g of Oxygen gas.

Q: Magnesium exists in nature as three stable isotopes. Suppose you determine that 9.87 moles of…

A: Given - Exact masses of isotopes of Mg 25Mg = 24.9858 amu 24Mg= 23.9850 amu. 26Mg = 25.9826 amu. To…

Q: How is the Mole concept calculated?

A: Mole concepts can be calculated as follows

Q: Calculate the number of atoms in each element.a. 25.8 g of Hg               c. 150 g of Arb. 0.0340…

A: a. 25.8 g of Hg = Molar mass of Hg = 200.59g/mol Mass of Hg = 25.8g Now, the number of atoms in Hg…

Q: Which sample contains the greatest number of atoms? (a) 15 g Ne (b) 15 g Ar (c) 15 g Kr (d) None of…

A: The mole concept is used to solve such problems. The mole concept was introduced by Avogadro to…

Q: . How many MOLECULES of water are present in 9.27 grams of this compound?

A:

Q: A scientist has two samples of gas: The first sample contains one mole of argon atoms and has a mass…

A: 1 mole of any gas has equal no. Of atoms i.e., avogadro no. of atoms 6.023*1023 atoms. Or Equal…

Q: What

A: The atomic mass of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g.

Q: How many atoms of He can a balloon that has a 19 cm diameter hold? The density of Helium is 1.18…

A: Given data,Diameter of balloon=19cmRadius of balloon=19cm2=9.5cmDensity of He=1.18g/L

Q: How many moles of calcium atoms do you have if you have 5.60 × 10²¹ atoms of calcium. (The mass of…

A: The question is based on mole concept. We have to calculate moles of calcium.

Q: how many atoms of scandium are in 7.54 moles of scandium

A: According to  Avogadro,  1 mol of scandium has 6.023 x 1023 number of atoms  Then 7.54 mols of…

Q: How many grams of oxygen are combined with 94 grams of iron to make the iron(II) oxide compound?

A: Given: Oxygen is combined with iron to give iron(II) oxide. Mass of iron = 94 grams.

Q: Record the number of each atom in the molecule, then record the total number of atoms in the…

A: We have to determine no of element and atoms

Q: 10. One mole of Sulfur is 32.06 g. How many moles would be found in: a. 85.9 g of Sulfur b. 10.57 g…

A: given 1 mole sulfur = 32.06 g

Q: 1. How many grams are present in 12 atoms of Potassium? a. 7.8 grams b. 3.91 x 10-22 grams 39.1…

A:

Q: Determine the number of atoms in 63.0 grams of calcium, Ca. (The mass of one mole of calcium is…

A: Given : Mass of 1 mole of calcium = 40.08 g And mass of calcium = 63.0 g

Q: How many moles of oxygen are contained in 1.33 moles of CaCO3?

A: A question about number of moles of CaCO3, which is to be accomplished.

Q: 2) How is the mole similar to a dozen?

A: (2) Answer- A mole is a unit of counting particles such as atoms, molecules, ions etc. which…

Q: Determine the mass, in grams, of 0.580 moles of Pb (1 mol of Pb has a mass of 207.2 g).

A:

Q: Determine the mass, in grams, of 0.145 moles of Pb (1 mol of Pb has a mass of 207.2 g).Determine the…

A: Given: Moles of Pb = 0.145 mol Molar mass of Pb = 207.2 g/mol Mass of Na = 61.0 g Molar mass of Na =…

Q: How many moles of calcium atoms do you have if you have 5.65 × 10²¹ atoms of calcium. (The mass of…

A: Mol defination:  Mole in terms of particles:  1 mol = Avogadro no.of particles            = 6.02 ×…

Q: In the final round of The Battle of Geniuses, you and your competitors were asked to guess the…

A: The number of rice grain present om 100 kg of rice can be calculated using a methodology simple to…

Q: 5) 25 grams of PbSO4 is equivalent to how many moles? a) 0.0824 b) 1.21 c) 1.56 d) 1.98

A: Given data: Grams of PbSO4= 25 g. To find: The number of moles of PbSO4.

Q: A sample of trifluoroacetic acid

A: Atomic mass of C = 12 amu Atomic mass of H = 1 amu Atomic mass of F = 19 amu Atomic mass of O = 16…

Q: How much calcium is contained in 25.0 g of calcium fluoride?

A: We have to calculate the amount of Calcium in given mass of CaF2 .

Q: How many atoms of Pt are present in 2.53 moles of Pt?

A:

Q: For 2.634 g of a compound containing only copper and oxygen, CuxOy, a student found that it…

A: We have to calculate the moles of oxygen.

Q: How many grams of Cl are there in a sample of Cl that contains the same number of moles as a 108…

A: Molar mass of Sulfur = 32.065 g/mole Molar mass of Cl = 35.45 g/mole

Q: Determine the mass, in grams, of 0.750 moles of S (1 mol of S has a mass of 32.07 g).

A:

Q: What is the mass of one mole of Sg?

A: Mass of one mole of any element means it's molar mass

Q: How many molecules of oxygen are found in 3.00 moles of oxygen?

A:

Q: How much does 36 moles of Carbon weigh?

A: Moles of carbon = 36 moles Weight of Carbon = ?

Q: If you have 1.45x10^25 atoms of potassium, how many moles of potassium do have? Round to significant…

A: Number of atoms can be calculated by multiplying number of moles with Avogadro number.

Q: What is the mass of 0.560 moles of chlorine gas?   A. 19.9   B. 63.3   C. 127   D. 39.7…

A:

Q: Determine the number of atoms in 61.0 grams of calcium, Ca.

A: Given;

Q: How many moles of mercury are present in 54.8 mL of mercury if the density of mercury is 13.6 g/mL?

A:

Q: What is the number of moles in 4.27×1022 particles of silver? (You must show your work in the space…

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.