Answer:
<em>The mass of NaHCO₃ that the man would need to ingest to neutralize this much HCl is 0.059 g.</em>
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Explanation:
1) <u>Chemical equation (given)</u>:
- HCl (aq) + NaHCO₃ (aq) → NaCl (aq) + H₂O (l) + CO₂ (g)
Both sides have the same number of atoms of each element:
Element Let side Right side
H 1 + 1 = 2 1 × 2 = 2
Cl 1 1
Na 1 1
C 1 1
O 3 1 + 2 = 3
Hence, the equation is balanced.
2. <u>Mole ratios:</u>
<u />
- 1 mol HCl : 1 mol NaHCO₃ : 1 mol NaCl : 1 mol H₂O : 1 mol CO₂
2)<u> Determine the number of moles of HCl in solution</u>:
- M = n / V (liters) ⇒ n = M × V (liters)
- V (liters) = 200.mL (1 liter / 1000 mL) = 0.200 liter
- n = 0.035 M × 0.200 liter = 0.00070 mol of HCl
3) <u>Set a proportion with the stoichiometric ratio and the actual ratio</u>:
- 1 mol NaHCO₃ / 1 mol HCl = x / 00070 mol HCl
⇒ x = 0.00070 mol NaHCO₃
4.<u> Convert 0.0070 mol NaHCO₃ to grams</u>:
- Mass in grams = molecular mass × number of moles
- molecular mass NaHCO₃ = 84.007 g/mol
- Mass of NaHCO₃ = 84.007 g/mol × 0.00070 mol = 0.0588 g ≈ 0.059 g
The answer has two significant digits because the molarity (0.035 M) is reported with two signficant digits.
6.37/ 58.5= .108888889
Since it had 3 sig figs the answer is 0.109
Answer:
A. Intramolecular interactions are generally stronger.
B. a. Only intermolecular interactions are broken when a liquid is converted to a gas.
Explanation:
<em>A. Which is generally stronger, intermolecular interactions or intramolecular interactions?</em>
Intramolecular interactions, in which electrons are gained, lost or shared, constitute true bonds and are one or two orders of magnitude stronger than intermolecular interactions.
<em>B. Which of these kinds of interactions are broken when a liquid is converted to a gas?</em>
When a liquid vaporizes, the intermolecular attractions are broken, that is, molecules get more separated. However, true bonds are not broken which is why the molecules keep their chemical identity.
The electron distribution in the Si atom : D. 2,8,4
<h3>Further explanation</h3>
The maximum number of electrons that can be filled in the nth electron shell is 2n²(n=shell)
- K shell (n = 1) maximum 2 x 1² = 2 electrons
- L shell (n = 2) maximum 2 x 2² = 8 electrons
- M shell (n = 3) maximum 2 x 3² = 18 electrons
- N shell (n = 4) maximum 2 x 4² = 32 electrons
Electron configuration of Si : 1s² 2s2²2p6⁶3s²3p² = 14 electron
The electron distribution :
K shell = 2
L shell = 8
M shell = 4
Answer:
Neutralization equation:
HCl + NaOH → NaCl + H₂O + Heat
Heat would calculated through,
Q = m . c. ΔT
Explanation:
When aqueous sodium hydroxide and hydrochloric acid react with each other a neutralization reaction occur. It produces water and salt. The salt would be sodium chloride.
Chemical equation:
HCl + NaOH → NaCl + H₂O + Heat
The heat produces can be calculated through the given formula.
Q = m . c. ΔT
Q = amount of heat produces
m = total mass of solution
ΔT = change in temperature of solution
C = specific heat capacity of solution
As the mostly solutions are water so we take the specific heat capacity of water which is 4.186 j/g .°C
