Carbon is the reference taken to assign the atomic mass unit
- One twelfth of the mass of unbound carbon-12 is taken as 1amu
- The unit for the atomic mass constant is Dalton (Da)
- This unit is standard when doing calculations in chemistry and physics
- 1amu = 1.6605x10⁻¹⁹g
- This was also derived from the law of definite proportions
- This standard has been set by the International Union of Pure and Applied Chemistry (IUPAC)
- The IUPAC is responsible for assigning various standards such as the nomenclature of various compounds, and updating the periodic table of elements.
- According to the IUPAC carbon is the reference taken to assign the atomic mass unit
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Potassium is a chemical element
Symbol: K
Atomic number: 19
Atomic mass: 39.0983 u ± 0.0001 u
Electron configuration: [Ar] 4s1
Melting point: 146.3°F (63.5°C)
Answer:
5.54 g/cm3
Explanation:
Since density is mass divided by volume, replace mass and volume with 55.4 g and 10 cm3. Then, divide it and get the answer, which is 5.54 g/cm3.
(2) the motion of the gas particles is random and straight-line, they cannot be influenced by outside forces, one example being a magnetic field.
When electrical power is applied to two plates placed inside the water, electrolysis occurs and hydrogen appear on the cathode and Oxygen on anode. It is due to the ideal faradaic efficiency, the amount of hydrogen generated is twice the number of moles of oxygen.
If you look at the equation , reduction occurs at cathode i.e
2 H+ + 2e−<span> → H</span>2
Oxidation occurs at anode
2 H2O → O2 + 4 H+ + 4e<span>−
</span>
Overall reaction
2 H2O(l) → 2 H2(g) + O2(g<span>)
Therefore, </span><span> volume of gas collected over one electrode double the volume of gas collected over the other electrode.</span>