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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. ### 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

3. ### 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

4. ### 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

5. ### An unknown compound was found to have a %composition of 67.67% carbon, 9.8% hydrogen and 22.5% oxygen. What is its empirical formula? ?

Assume you have 100g of the substance so that all the percentages become grams  Take the grams of each substance and divide by its molar mass (i.e. 12.01 for carbon) From the results, divide each of them by the smallest answer...

2 Answers · Science & Mathematics · 10/02/2020

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. ### What is the maximal speed that an electron orbits the Nucleus of an hydrogen atom?

Prior to quantum mechanics we thought of the electron as orbiting in circles around a nucleus. The orbital speed could be calculated from kQq/ r^2 = m v^2/r But there were problems with this model. It would certainly...

3 Answers · Science & Mathematics · 28/05/2019

10. ### What would the mass of 1 Liter (1000 mL or 1000 cm3) of hydrogen be?

a milliliter is also one cubic cm. You have 1000 of those units. Multiply the density by 1000 to get the mass.

2 Answers · Science & Mathematics · 29/06/2019