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Contact [7]
3 years ago
9

Please help I am stuck

Chemistry
1 answer:
Ksenya-84 [330]3 years ago
8 0
The theory of plate tectonics tells exactly where the continents were before Pangaea divided.

I'm not a 100% sure but I feel strong about is
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State and explain modern periodic table. ⊕⊕
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Explanation:

the physical and chemical properties of an element are periodic functions of their atomic number.

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Why does hydrogen fluoride have a high boiling point
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The intermolecular bonding for HF is van der Waals, whereas for HCL, the intermolecular bonding is hydrogen. Since the van der Waals bond is stronger than hydrogen, HF will have a higher boiling temperature. Since the covalent bond is stronger than van der Waals, HF will have a higher boiling temperature.

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Explain the difference between the reactants and products of a chemical reaction
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Reactants are the starting substances and products are the ending substances in a chemical reaction.

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3 years ago
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Determine the number of moles NH41+ in 3 moles of (NH4)3PO4.
fomenos
(NH₄)₃PO₄ is a strong electrolyte which fully dissociates into its ions. The balanced equation for the dissociation is
(NH₄)₃PO₄ → 3NH₄⁺ + PO₄³⁻

The stoichiometric ratio between (NH₄)₃PO₄ and NH₄⁺ is 1 : 3

Hence, moles of (NH₄)₃PO₄ / moles of NH₄⁺ = 1 / 3
 
moles of (NH₄)₃PO₄ = 3 mol 

Hence, moles of NH₄⁺ = moles of (NH₄)₃PO₄ x 3
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Hence, 3 moles of (NH₄)₃PO₄ give 9 moles of NH₄⁺.
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