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1. ### What is the final molarity of hydrogen ions if 4.526L of 0.3521 M hydrobromic acid is mixed with 5.275L of 1.563 M nitric acid?

Both acids are strong, so the concentration of H+ ions will be the same as the concentration of the acid(s). Supposing additive volumes: ((4.526 L x 0.3521 M) + (5.275 L x 1.563 M)) / (4.526 L + 5.275 L) = 1.004 M

1 Answers · Science & Mathematics · 19/07/2019

2. ### compared with total energy of hydrogen atom in the ground state, the total energy of atom in an excited state is less, greater, or the same?

An excited state has more energy. The term "ground state" means lowest energy state.

1 Answers · Science & Mathematics · 19/05/2019

3. ### Why is Potassium Iodide is a stronger electrolyte than Hydrogen Fluoride? If they were equally 1.0 M, shouldn't both have conduct of 2?

No, they do not have the same conductivity. The reason is that KI is a strong electrolyte, i.e. it ionizes completely. However HF is a weak electrolyte, i.e. it ionizes only partially.

2 Answers · Science & Mathematics · 25/09/2019

4. ### Atomic number of C=6 and atomic number of hydrogen = 1. How many electrons are present in 1.6 gms of methane?

the molar mass of methane (CH4) is 16 g. (C=12 and H=1). So, 1.6 g of methane is 0.1 mole of methane. How many electrons in CH4? C has 6 and each H has 1, so each molecule of CH4 has 10...

2 Answers · Science & Mathematics · 17/07/2019

5. ### Sodium metal reacts with water inmass of hydrogen gas produced when 2.0g of sodium is added to 10.0g of water.?

Limiting reactant problem Compute the amount of product using each reactant. The theoretical yield will be the smaller of the two, and give the limiting reactant. 2Na(s) + 2HOH(l) --> 2NaOH(aq) + H2(g) 2.0g ....... 10.0g...

1 Answers · Science & Mathematics · 09/07/2019

6. ### how much energy is required to remove an electron from the hydrogen atom if the electron begins at n=1?

The energy of the n=1 level is -13.6 eV relative to the electron being at infinity. So the required energy (ionization energy) is 13.6 eV.

3 Answers · Science & Mathematics · 01/06/2019

7. ### how do scientist know what's what when examining? how do you tell a carbon atom from a hydrogen one? color, size, # of something?

The # of protons is the difference between atoms of different elements at the same temkoperature. Different isotopes of the same elements t have the same # of protons, but different numbers of neutrons...

3 Answers · Science & Mathematics · 09/05/2019

8. ### Propane gas, C3H8 is used as a fuel for many barbecues. How many moles of hydrogen are in 143 moles of propane?

How many moles .... 143 mol C3H8 x (8 mol H / 1 mol C3H8) = 1144 mol H

2 Answers · Science & Mathematics · 16/05/2019

9. ### Take a 2020 Tesla Roadster, with 620 mi range, remove the back seats & add a fuel cell & tank of hydrogen, could you drive New York to L.A.?

You probably could but you might not make it all the way.

8 Answers · Environment · 08/01/2019

10. ### What if the nitrogen in our at atmosphere was replaced by other gas(helium,carbon dioxide,hydrogen etc)But oxygen level stayed the same?

CO₂, we would be dead He, we would be ok, but plant life would eventually die, as they need nitrogen. Ditto with other noble gases. H₂, that would be an explosive mixture and the entire atmosphere would explode, killing all life. Methane, also explosive.

4 Answers · Science & Mathematics · 17/02/2019