Chemistry, 25.03.2020 18:40 xxaurorabluexx

How many atoms are found in 4.75 moles of Fe?

Calculate the number of moles in 1.058 mole of H2O.

Calculate the number of atoms in 0.750 mole of Fe.

Calculate the number of molecules in 3.5 miles of H2O.

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Answer from: christianconklin22

The answer to your question is below

Explanation:

Number of atoms = ?

moles of Fe = 4.75

-Use proportions to solve this problem

1 mol of Fe 6.023 x 10²³ atoms

4.75 moles x

x = (4.75 x 6.023 x 10²³) / 1

x = 2.86 x 10²⁴ / 1

Number of atoms = 2.86 x 10²⁴

Number of moles = ?

moles of 1.058 moles of H₂O

I think this question is incorrect, maybe you wish to know the number of atoms or grams of H₂O.

Number of atoms = ?

moles of Fe = 0.759

1 mol of Fe 6.023 x 10²³ atoms

0.759 moles x

x = (0.759 x 6.023 x 10²³) / 1

x = 4.57 x 10²³ / 1

Number of atoms of Fe = 4.57 x 10²³ atoms

Number of molecules = ?

moles of H₂O = 3.5 moles

1 mol of H₂O 6.023 x 10²³ molecules

3.5 moles x

x = (3.5 x 6.023 x 10²³) / 1

x = 2.11 x 10²⁴ molecules

Number of molecules = 2.11 x 10²⁴

Answer from: Quest

i believe that it is a exoplanet

Answer from: Quest

remember that hf is only the energy of one photon. not two. not three. one. 1) 5.12 * 10^3 photons find the energy of one photon, then determine how many photons are needed to reach the sensitivity. e = hf = (6.626 * 10^-34 js)(5.95 * 10^19 hz) = 3.94247 * 10^-14 j per photon (2.02 * 10^-10 j) / (3.94247 * 10^-14 j/photon) = 5123.69149 photons round to three sig figs. 2) 5.77 * 10^-17 j energy of pulse = energy per photon * number of photons = hfn = (6.626 * 10^-34 js)(1.66 * 10^13 hz)(5250) = 5.774559 * 10^-17 j round to three sig figs. 3) 4.07 * 10^8 kj/mol 10^12 pm = 1 m c = fλ f = c/λ e = hf = hc/λ = [(6.626 * 10^-34 js)(3.00 * 10^8 m/s) / (2.94 * 10^-12 m)](1 kj/1000 j)(6.02 * 10^23 photons/mol) = 40702571.4 kj/mol round to three sig figs. 4) 9.94 * 10^-1 m e = hc/λ λ = hc / e = (6.626 * 10^-34 js)(3.00 * 10^8 m/s) / (2.00 * 10^-25 j) = 0.9939 m round to three sig figs. 5) 9.06 * 10^3 photons energy of pulse = energy per photon * number of photons number of photons = energy of pulse / energy per photon = energy of pulse / (hf) = (3.87 * 10^-13 j) / [(6.626 * 10^-34 js)(6.45 * 10^16 hz)] = 9055.23695 photons round to three sig figs. 6) 2.78 * 10^-15 j this is problem 1, except in reverse. sensitivity = minumum number of photons * energy per photon = (5930)(6.626 * 10^-34 js)(7.077 * 10^14 hz) = 2.78070758 × 10^-15 j round to three sig figs.

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How many atoms are found in 4.75 moles of Fe?

Calculate the number of moles in 1.058 mol...

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