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Mademuasel [1]
3 years ago
14

How can one show that elements that have different appearances have similar chemical properties?​

Chemistry
1 answer:
ad-work [718]3 years ago
4 0

Answer:

Elements within the same group have the same number of electrons in their valence (outermost) shells, and they have similar electron configurations. They exhibit similar chemical properties.

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The chemical name for the compound formula NaCl is?
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The chemical name for the compound formula NaCl is sodium chloride.

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If 125 grams of Cu reacts 75 grams of HNO3, how many grams of Cu(NO3) form?
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Answer: 37.5grams of Cu(NO3)2

Cu(1mol) + 2HNO3(2mol) —> Cu(NO3)2 + H2

<em>125 grams of Cu(1mol) reacts with 75 grams of HNO3(2mol)</em>

<em><u>HNO3 is the limiting substance, therefore, 75 grams is the limiting quantity.</u></em>

<em>Therefore, 2mol of HNO3 forms 1mol of Cu(NO3)2</em>

<em>75 grams of HNO3 forms...75grams x 1mol/2mol = 37.5 grams of Cu(NO3)2</em>

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In a water molecule (H2O), the oxygen atom has two unshared pairs of electrons and two bonding pairs of electrons. How do the un
vladimir1956 [14]

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They reduce the bond angle to be slightly lower than the tetrahedral bond angle, approximately 104.45 degrees.

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The bond angle is slightly lower than the tetrahedral bond angle of 108 degrees, leaving the water molecule with a bent molecular geometry.

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