This might not make sense but just watch
NaCl - Na(+) +Cl(-) (two ions)
(0.321m NaCl) x(2 mol ions/1 mol NaCl) =
=0.642m ions
(0.642m) x (0.512°C/m) = 0.329°C change
100°C + 0.329°C = 100.33°C.
Good luck
The correct answer is A. :)
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.
Answer:
See the answer and the resolution below
Explanation:
The equation of the decomposition of magnesium carbonate is as follows:
Mg C03 (white solid) ---> C02 (gas) + Mg= (solid)
To calculate the mass of carbon dioxide produced, the weight of 1 mol of this and 1 mol of MgC03 is calculated. Then a simple rule of 3 is made.
Weight 1 mol of MgC03= Weight Mg + Weight C+ 3x(Weight 0)= 24,305g+ 12,017+3x (15,999)= 84, 318g/mol
Weight 1 mol of C02= Weight C + 2x(Weight 0)=12,017+2x (15,999)= 44, 008g/mol
84, 319 g MgC03------44,008g C02
36,0 g MgC03------X= (36,0 g MgC03x44,008g C02)/84, 319 g MgC03= 18,8 g C02
First, you need to find the mass of 1 mol of sugar. Mass, or molar mass, can simply be found by adding the masses of the individual elements. These are given to you on the periodic table.
12 x 12.011 grams (molar mass of Carbon) = 144.132 g
22 x 1.008 grams (molar mass of Hydrogen) = 22.176 g
11 x 15.999 grams (molar mass of Oxygen) = 175.989 g
Add all of the pieces together.
144.132 g + 22.176 g + 175.989 g = 342.297 grams
So, if one mole has 342.297 grams, then 7.35 of that amount will be your answer.
342.297 g/mol x 7.35 mol = 2,515.88 grams
