Answer:
<em>The mass of NaHCO₃ that the man would need to ingest to neutralize this much HCl is 0.059 g.</em>
<em />
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.
Answer:
K = 2.96x10⁻¹⁰
Explanation:
Based on the initial reaction:
N2O4 ⇄ 2NO2; K = 1.5x10³
Using Hess's law, we can multiply this reaction changing K:
3 times this reaction:
3N2O4 ⇄ 6NO2; K = (1.5x10³)³ =3.375x10⁹
The inverse reaction has a K of:
6NO2 ⇄ 3N2O4 K = 1/3.375x10⁹;
<h3>K = 2.96x10⁻¹⁰</h3>
Im sure that the answer is C, correct me if im wrong.
Answer:
Isomers of hydrocarbons have the <u>molecular</u> formula but <u>structural</u> formula.
Explanation:
Molecules with the same structural formula, but different molecular geometries (spatial arrangement) are called isomers. These differences in the arrangement of the various atoms confer certain differences in chemical properties to the resulting hydrocarbons, even though their chemical composition is the same. There are two types of isomers:
Structural isomers: Here, each atom are connected or bonded in different ways, hence structural isomers may contain different functional groups or pattern of bonding. structural isomers are further divided into: chain, position, and functional group isomers.
Stereoisomers: Here, the connections of the atoms are the same, but the difference is in their orientation in space
