Answer: is the same for all substances.
Explanation:
The number of molecules in one mole of a substance is the same for all substances because
A mole (which is the quantity of a substance that has the same number (Avogadro's number, is 6.022 * 10^23) of particles as are found in 12.000 grams of carbon-12 of the substance) for any substance has the same number of atoms, molecules, or ions contained in any other substance.
1 mole = 6.022 x 10^23 atoms, molecules, or ions
The correct answer is:
a positron is emitted when proton converts to a neutron.
The reaction can be described as following:
₁¹p (proton) → ₀¹n (neutron) + ₁°e (positron or ₁⁰β)
Positron is an antiparticle of a β particle (₋₁°β), which means it has an oposite charge to it, but same mass.
Answer:
The answer to your question is below
Explanation:
Organic chemistry studies the compounds that have carbon, hydrogen, oxygen and other elements in their structure.
Carbohydrates are biomolecules that are composed of carbon, hydrogen, and oxygen that is why they are studied by organic chemistry.
Other biomolecules that are also studied by organic chemistry are Proteins, Lipids, and Vitamins.
Answer:
The ratio, ![\frac{[HCO_{3}^{-}]}{[H_{2}CO_{3}]}](https://tex.z-dn.net/?f=%5Cfrac%7B%5BHCO_%7B3%7D%5E%7B-%7D%5D%7D%7B%5BH_%7B2%7DCO_%7B3%7D%5D%7D)
, is 10.7
Explanation:
is an weak acid and 
is it's conjugate base.
So, according to Henderson-Hasselbalch equation, pH of this buffer system can be represented as-
![pH=pK_{a}(H_{2}CO_{3})+log(\frac{[HCO_{3}^{-}]}{[H_{2}CO_{3}]})](https://tex.z-dn.net/?f=pH%3DpK_%7Ba%7D%28H_%7B2%7DCO_%7B3%7D%29%2Blog%28%5Cfrac%7B%5BHCO_%7B3%7D%5E%7B-%7D%5D%7D%7B%5BH_%7B2%7DCO_%7B3%7D%5D%7D%29)
Here pH=7.40, 
=6.37
So, ![7.40=6.37+log(\frac{[HCO_{3}^{-}]}{[H_{2}CO_{3}]})](https://tex.z-dn.net/?f=7.40%3D6.37%2Blog%28%5Cfrac%7B%5BHCO_%7B3%7D%5E%7B-%7D%5D%7D%7B%5BH_%7B2%7DCO_%7B3%7D%5D%7D%29)
or, ![\frac{[HCO_{3}^{-}]}{[H_{2}CO_{3}]}=10.7](https://tex.z-dn.net/?f=%5Cfrac%7B%5BHCO_%7B3%7D%5E%7B-%7D%5D%7D%7B%5BH_%7B2%7DCO_%7B3%7D%5D%7D%3D10.7)
So the ratio, , is 10.7
A source with opinions, no factual information.
