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gizmo_the_mogwai [7]
3 years ago
6

If 1.00 calorie = 4.18kj, how many kj of energy can be released by an apple containing 125 cal?

Chemistry
1 answer:
Georgia [21]3 years ago
6 0

Answer:

the answeerrrr issues c

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How many grams of magnesium acetate are in 8.95x10^23 formula units?
Natasha_Volkova [10]

Answer:

211.63 g.

Explanation:

  • Particles could refer to atoms, molecules, formula units.
  • <em>Knowing that every one mole of a substance contains Avogadro's no. of molecules (NA = 6.022 x 10²³).</em>

<em><u>Using cross multiplication:  </u></em>

1.0 mole → 6.022 x 10²³ molecules.

??? mole → 8.95 x 10²³ molecules.

  • The no. of moles of magnesium acetate = (8.95 x 10²³ molecules) (1.0 mole) / (6.022 x 10²³ molecules) = 1.486 mol.

∴ The grams of magnesium acetate are in 8.95 x 10²³ formula units = n x molar mass = (1.486 mol)(142.394 g/mol) = 211.63 g.

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Whats the name?!?!?!??!?!?!?!?!?!?!!?!?!?!??!?!?!?!
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