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The particle has 15 protons and 18 electrons. Can you tell m…

The particle has 15 protons and 18 electrons. Can you tell me the name of it?

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As you move down a group of elements (family), the number of…

As you move down a group of elements (family), the number of valence electrons 

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A 0.120kg wooden block s measures 85.00 mm in length, 45.0 m…

A 0.120kg wooden block s measures 85.00 mm in length, 45.0 mm in width, and 35  mm in height. What is the density of the block in g/cm3? 

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The volume of water displaced by ten glass beads was 1.12 mL…

The volume of water displaced by ten glass beads was 1.12 mL and the measured mass of ten glass beads was 2.687 g. What is the density of a glass bead in g/cm3?

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How many sigma bonds, pi bonds and nonbonding domains, respe…

How many sigma bonds, pi bonds and nonbonding domains, respectively, can be associated with I in the molecule of IOF3?

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Balance the following reaction and determine the coefficient…

Balance the following reaction and determine the coefficient for water. __H3PO4(aq) + __Ca(OH)2(aq) → __Ca3(PO4)2(s) + __H2O(l)

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How are the pOH and pH linked?

How are the pOH and pH linked?

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Write and balance the molecular equation for the complete ne…

Write and balance the molecular equation for the complete neutralization of H3PO4 by Ca(OH)2 What is the molar ratio of acid to base (stoichiometric factor)?

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Density is an intensive property of a substance. This means…

Density is an intensive property of a substance. This means that the density of ten glass beads (the same type of glass):

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What is the molarity of a NaOH (MM=39.997 g/mol) solution th…

What is the molarity of a NaOH (MM=39.997 g/mol) solution that contains 7.30 g of NaOH in 150 mL of solution?

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