Planck's constant =
6.62607004 × 10-34 m2 kg / s
Explanation:
Step by Step explanation
The Planck constant, or Planck's constant, is a fundamental physical constant denoted h, and is of fundamental importance in quantum mechanics. A photon's energy is equal to its frequency multiplied by the Planck constant. Due to mass–energy equivalence, the Planck constant also relates mass to frequency. Wikipedia
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Answer:
Density,
Explanation:
It is given that the density of liquid mercury is 13.6 g/mL. We need to convert the density into lb/in³.
We know that,
2.205 lbs= 1 kg
1 g = 0.0022 lb
1 mL = 0.0610 in³
So, the density of liquid mercury is .
Answer:
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Answer:
0.036 × 10²³ oxygen atoms
Explanation:
Given data:
Mass of compound = 0.24 g
Number of oxygen atoms = ?
Solution:
First of all we will calculate the number of moles of compound.
number of moles = mass/ molar mass
Number of moles = 0.24 g/ 100.1 g/mol
Number of moles = 0.002 mol
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole of CaCO₃ contain 3 moles of oxygen atom.
0.002 mol × 3 = 0.006 moles of oxygen atoms.
Number of oxygen atoms:
1 mole = 6.022 × 10²³ number of oxygen atoms
0.006 mol × 6.022 × 10²³ f oxygen atoms / 1 mol
0.036 × 10²³ oxygen atoms