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Author Archives: Anonymous

A neutral atom with atomic number 13 contains how many elect…

A neutral atom with atomic number 13 contains how many electrons?

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How many valence electrons does a neutral atom of aluminum p…

How many valence electrons does a neutral atom of aluminum possess?

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If [H⁺]=4.2×10⁻⁴ M, calculate pH using significant figures.

If [H⁺]=4.2×10⁻⁴ M, calculate pH using significant figures.

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What mass of aluminum is heated if q=810. J, c=0.900 J/g°C,…

What mass of aluminum is heated if q=810. J, c=0.900 J/g°C, and ΔT=30.0 °C?

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Which radiation type carries a +2 charge and consists of two…

Which radiation type carries a +2 charge and consists of two protons and two neutrons?

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Balance: __ Na₂CO₃ + __ HCl → __ NaCl + __ H₂O + __ CO₂

Balance: __ Na₂CO₃ + __ HCl → __ NaCl + __ H₂O + __ CO₂

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Classify: Zn + CuSO₄ → ZnSO₄ + Cu

Classify: Zn + CuSO₄ → ZnSO₄ + Cu

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How many valence electrons does sulfur possess?

How many valence electrons does sulfur possess?

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Balance: __ Al + __ Cl₂ → __ AlCl₃

Balance: __ Al + __ Cl₂ → __ AlCl₃

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Balance: __ Ca(OH)₂ + __ H₃PO₄ → __ Ca₃(PO₄)₂ + __ H₂O

Balance: __ Ca(OH)₂ + __ H₃PO₄ → __ Ca₃(PO₄)₂ + __ H₂O

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