How many grams are in 2.6 moles of Maganese?

What is the mass of 14.7 moles of H2O?

What is the mass of 7.2 Liters of H2O?

mols = g/molar mass will get the first two.

I suppose this is at STP. L x (1 mol/22.4L) = mols, then use the above formula to convert mols to grams.

So for the first one would I divide 2.6 and the molar mass of Manganese which is 24.3 to get the answer?

To find the mass of a substance, you need to know its molar mass. The molar mass is the mass of one mole of the substance. To calculate the mass in grams, you multiply the number of moles by the molar mass.

The molar mass of an element can be found on the periodic table. For manganese (Mn), the molar mass is approximately 54.94 g/mol.

For the first question, to find the mass of 2.6 moles of manganese, you can use the formula:

Mass = Number of moles * Molar mass

Mass = 2.6 moles * 54.94 g/mol = 142.84 grams of manganese.

For the second question, you need to find the molar mass of water (H2O). Water consists of two hydrogen atoms (H) and one oxygen atom (O). The molar mass of hydrogen is approximately 1.01 g/mol, and the molar mass of oxygen is approximately 16.00 g/mol. Therefore, the molar mass of water is:

Molar mass of water = 2 * Molar mass of hydrogen + Molar mass of oxygen

Molar mass of water = (2 * 1.01 g/mol) + 16.00 g/mol = 18.02 g/mol

To find the mass of 14.7 moles of water, use the formula:

Mass = Number of moles * Molar mass

Mass = 14.7 moles * 18.02 g/mol = 264.99 grams of water.

For the third question, you need to convert liters of water to grams. The density of water is approximately 1 gram per milliliter (g/mL) or 1 kilogram per liter (kg/L). Therefore, the mass of water in grams is equal to its volume in liters.

To find the mass of 7.2 liters of water:

Mass = Volume

Mass = 7.2 L = 7.2 kg = 7200 grams of water.