How can you use the periodic table to find the number of protons in one atom of an element?

2 answers:

7 0

The answer is A because the number of protons is the same number as the elements atomic number and it always will be same thing with neutrons

evablogger [386]3 years ago

6 0

A is your answer.
On the periodic table the atomic number is the number of protons inside the nucleus.

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Given the following equation, how many grams of PbCO3 will dissolve when exactly 1.0 L of 1.00 M H+ is added to 6.00 g of PbCO3?

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Calculating for the moles of H+
1.0 L x (1.00 mole / 1 L ) = 1 mole H+

From the given balanced equation, we can use the stoichiometric ratio to solve for the moles of PbCO3:
1 mole H+ x (1 mole PbCO3 / 2 moles H+) = 0.5 moles PbCO3

Converting the moles of PbCO3 to grams using the molecular weight of PbCO3
0.5 moles PbCO3 x (267 g PbCO3 / 1 mole PbCO3) = 84.5 g PbCO3

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Five gases combined in a gas cylinder have the following partial pressures: 3. 00 atm (N2), 1. 80 atm (O2), 0. 29 atm (Ar), 0. 1

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The total pressure of the gaseous mixture has been 5.37 atm. Thus, option D is correct.

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