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sertanlavr [38]
3 years ago
12

What is the atomic mass of helium?

Chemistry
1 answer:
Gnom [1K]3 years ago
8 0
4.002602 u
Being one of the lightest elements in the world, Helium has an atomic mass of 4.0026 u. u means Unified Atomic Mass Units. 1 u equals to the mass of 1/12 of the mass of a 12C ( Carbon - 12 ) isotope.
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A 20.00 ml sample of a solution of sr(oh)2 is titrated to the equivalence point with 40.03 ml of 0.1159 n hcl. what is the molar
goblinko [34]
The   molarity  of Sr(OH)2  solution is  =  0.1159 M

    calculation
write the equation  for reaction
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then finds the mole  of HCl used

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by  use of mole ratio between Sr(OH)2 to  HCL which is 1 :2  the moles of Sr(OH)2  is therefore =  4.639  x1/2 = 2.312  moles

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umka2103 [35]
Formula: 
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ipn [44]

Answer:

Explanation:

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Symbol: Ta

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Boiling Point: 5425.0 °C (5698.15 K, 9797.0 °F)

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Answer:

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