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Harlamova29_29 [7]
2 years ago
10

All atoms of an element have the same number of ________. electrons neutrons protons protons plus neutrons

Chemistry
1 answer:
Cloud [144]2 years ago
6 0

Answer:

protons

Explanation:

An element, by definition, always has the same number of protons.  Sodium, element 11, has 11 protons.  Anything with 11 protons is a sodium atom, regardless of the number of neutrons, electrons, or politicians.  

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Hydrochloric acid (HCl) is a strong acid that completely ionizes in an aqueous solution. If its [H3O+] concentration is 0.023 M,
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7 0
3 years ago
If one starts with pure NO2(g) at a pressure of 0.500 atm, the total pressure inside the reaction vessel when 2 NO2(g) ⇌ 2 NO(g)
Anni [7]

Answer:

The equilibrium partial pressure of NO2 is 0.152 atm

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Step 1: Data given

Initial pressure of NO2 = 0.500 Atm

Total pressure inside the vessel at equilibrium = 0.674 atm

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2 NO2(g) ⇌ 2 NO(g) + O2(g)

Step 3: The initial pressures

pNO2 = 0.500 atm

pNO = 0 atm

pO2 = 0 atm

Step 4: The pressure at the equilibrium

pNO2 = 0.500 - 2x

pNO = 2x

pO2 = x

Total pressure = 0.674 = (0.500 - 2x) + 2x + x

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x = 0.174

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The equilibrium partial pressure of NO2 is 0.152 atm

4 0
3 years ago
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