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Dmitriy789 [7]
3 years ago
15

Who identified the electron?

Chemistry
2 answers:
liraira [26]3 years ago
8 0

George Johnstone Stoney

____ [38]3 years ago
7 0

George Johnstone Stoney

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How many moles of na2co3 are necessary to reach stoichiometric quantities with cacl2
lbvjy [14]

0.0102 moles Na₂CO₃ = 1.08g of Na₂CO₃ is necessary  to reach stoichiometric quantities with cacl2.

<h3>Explanation:</h3>

Based on the reaction

CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃

1 mole of CaCl₂ reacts per mole of Na₂CO₃

we have to calculate how many moles of CaCl2•2H2O are present in 1.50 g

  • We must calculate the moles of CaCl2•2H2O using its molar mass (147.0146g/mol) in order to answer this issue.
  • These moles, which are equal to moles of CaCl2 and moles of Na2CO3, are required to obtain stoichiometric amounts.
  • Then, we must use the molar mass of Na2CO3 (105.99g/mol) to determine the mass:

<h3>Moles CaCl₂.2H₂O:</h3>

1.50g * (1mol / 147.0146g) = 0.0102 moles CaCl₂.2H₂O = 0.0102moles CaCl₂

Moles Na₂CO₃:

0.0102 moles Na₂CO₃

Mass Na₂CO₃:

0.0102 moles * (105.99g / mol) = 1.08g of Na₂CO₃ are present

Therefore, we can conclude that 0.0102 moles Na₂CO₃  is necessary.to reach stoichiometric quantities with cacl2.

To learn more about stoichiometric quantities visit:

<h3>brainly.com/question/28174111</h3>

#SPJ4

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2 years ago
Would you see more living things in a Biome or an Ecosystem?
kicyunya [14]

Answer:

A Biome is way bigger than a ecosystem

Explanation:

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How is electrolysis most commonly used to produce an energy source?
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Splitting water molecules produces hydrogen gas, which is used to power machines through hydrogen fuel cells. ( B-)

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12. Photosynthesis builds sugars out of small molecules, making it an
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Condensation reaction/ direct synthesis reaction

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Combines simple molecules to form complex molecules producing water

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here is definition with example

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