Complete Question:
Sodium hydrogen carbonate (NaHCO3), also known as sodium bicarbonate or "baking soda", can be used to relieve acid indigestion. Acid indigestion is the burning sensation you get in your stomach when it contains too much hydrochloric acid (HCl), which the stomach secretes to help digest food. Drinking a glass of water containing dissolved NaHCO3 neutralizes excess HCl through this reaction: HCl (aq) + NaHCO3 (aq)--> NaCl (aq) + H2O (I) + CO2 (g).
The CO2 gas produced is what makes you burp after drinking the solution. Suppose the fluid in the stomach of a man suffering from indigestion can be considered to be 50.0 mL of a 0.034 M HCl solution. What mass of NaHCO3 would he need to ingest to neutralize this much HCl? Be sure your answer has the correct number of significant digits.
Answer:
0.143 g
Explanation:
The balanced reaction of neutralization is:
HCl(aq) + NaHCO3 (aq)--> NaCl(aq) + H2O(I) + CO2(g)
Thus, by the stoichiometry, it is necessary 1 mol of NaHCO3 neutralizes 1 mol of HCl. The number of moles of HCl presented in the stomach is the volume (50.0 mL = 0.05 L) multiplied by the concentration (0.034 M), which is 0.0017 mol.
So, it's necessary 0.0017 mol of baking soda. The molar mass of it is 84 g/mol, so the mass needed is the molar mass multiplied by the number of moles:
m = 84 * 0.0017
m = 0.143 g
I think the above conversion is an example of A.) ALPHA DECAY.
In Alpha decay, nucleus releases an alpha particle, Helium. When the alpha particle is released the remaining nucleus weighs less due to the decrease in neutrons and protons have also decreased in number.
1. The atomic number deceases by one and the atomic mass is unchanged - β⁺/positron emission. In this a proton is converted to a neutron, hence no net change in mass. Since a proton is converted to neutron, the daughter nuclide's proton number /atomic number decreases by 1. Then atomic number decreases by 1 and no change in mass.
2.the atomic number decreases by two, and the atomic mass decreases by four - alpha decay / ⁴₂α. alpha particles have 2 neutrons and 2 protons. Since 2 protons and 2 neutrons are emitted, the mass of the nuclide decreases by 4. Since 2 protons have been emitted, this results in atomic number decreasing by 2.
3.<span>the atomic number increases by one, and the atomic mass remains unchanged. - </span>β⁻ beta decay. In this type of decay - beta decay , a neutron is converted to a proton, therefore no net change in mass. Since a proton is formed, atomic number increases by 1. Therefore atomic number increases by 1 and no change in mass.
I think the correct answer from the choices listed above is option D. The net ionic equation that will describe the reaction of the reactants when mixed is expressed as:
<span>2PO43–(aq) + 3Ca2+(aq) → Ca3(PO4)2(s)
</span>
Hope this answers the question. Have a nice day.
Answer:
+2
Explanation:
+2 is the calcium carbonate oxidation number