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cupoosta [38]
1 year ago
6

Calcium dihydrogen phosphate, Ca(H₂PO₄)₂, and sodium hydrogen carbonate, NaHCO₃, are ingredients of baking powder that react to

produce CO₂, which causes dough or batter to rise:
Ca(H₂PO₄)₂ (s) + NaHCO₃(s) →
CO₂(g) + H₂O(g) + CaHPO₄(s) + NaHPO₄(s)
[unbalanced]
If the baking powder contains 31% NaHCO3 and 35% Ca(H₂PO₄)₂ by mass:
(b) If 1 mol of CO₂ occupies 37.0 L at 350°F (a typical baking temperature), what volume of CO₂ is produced from 1.00 g of baking powder?
Chemistry
1 answer:
Gre4nikov [31]1 year ago
5 0

0.012 mol of CO₂ is the volume of CO₂ is produced from 1.00 g of baking powder.

Balanced Equation:

Ca(H₂PO₄)₂(s) + 2NaHCO₃(s) → 2CO₂(g) + 2H₂O(g) + CaHPO₄(s) + Na₂HPO₄(s)

On 3.50 g of baking powerd:

mCa(H₂PO₄)₂ = 0.35*3.50 = 1.225 g

mNaHCO₃ = 0.31*3.50 = 1.085 g

The molar masses are: Ca = 40 g/mol; H = 1 g/mol; P = 31 g/mol; O = 16 g/mol; Na = 23 g/mol; C = 12 g/mol. So:

Ca(H₂PO₄)₂: 40 + 4x1 + 31 + 8x16 = 203 g/mol

NaHCO₃: 23 + 1 + 12 + 3x16 = 84 g/mol

The mass divided by the molar mass yields the number of moles, as in:

nCa(H₂PO₄)₂ = 1.225/203 = 0.006 mol

nNaHCO₃ = 1.085/84 = 0.0129 mol

Find the reactant that is limiting first. The stoichiometry for the Ca(H₂PO₄)₂ test is:

1 mol of Ca(H₂PO₄)₂ ---------- 2 mol of NaHCO₃

0.006 of Ca(H₂PO₄)₂ -------- x

By a simple direct three rule:

x = 0.012 mol

NaHCO₃ is therefore too much. After performing the stoichiometry calculus with the limiting reactant:

1 mol of Ca(H₂PO₄)₂ ------------- 2 mol of CO₂

0.006 of Ca(H₂PO₄)₂ -------- x

By a simple direct three rule:

x = 0.012 mol of CO₂

What is molar mass and how is it calculated?

The mass of every atom in a molecule, expressed in grams per mole, is known as the molar mass. We first obtain the atomic weights of the different elements in a periodic table in order to compute the molar mass of a molecule. Then, we multiply the total number of atoms by each one's atomic mass.

How is molar mass calculated and why is it important?

When converting a mass measurement to a substance amount, the molar mass ratio is utilized. The number of atoms, molecules, or ions that make up this quantity is used to express it. It is the proportion of an object's mass to the quantity of its constituent particles.

Learn more about molar mass: brainly.com/question/13152455

#SPJ4

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PLEASE HELP!!!!!!!
dsp73

Answer: 1. 2Al+3CuCl_2\rightarrow 2AlCl_3+3Cu

2. 3 moles of CuCl_2 : 2 moles of Al

3. 0.33 moles of CuCl_2 : 0.92 moles of Al

4. CuCl_2 is the limiting reagent and Al is the excess reagent.

5. Theoretical yield of AlCl_3 is 29.3 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} Al=\frac{25.0g}{27g/mol}=0.92moles

\text{Moles of} CuCl_2=\frac{45.0g}{134g/mol}=0.33moles

The balanced chemical equation is:

2Al+3CuCl_2\rightarrow 2AlCl_3+3Cu  

According to stoichiometry :

3 moles of CuCl_2 require = 2 moles of Al

Thus 0.33 moles of CuCl_2 will require=\frac{2}{3}\times 0.33=0.22moles  of Al

Thus CuCl_2 is the limiting reagent as it limits the formation of product and Al is the excess reagent.

As 3 moles of CuCl_2 give = 2 moles of AlCl_3

Thus 0.33 moles of CuCl_2 give =\frac{2}{3}\times 0.33=0.22moles  of AlCl_3

Theoretical yield of AlCl_3=moles\times {\text {Molar mass}}=0.22moles\times 133.34g/mol=29.3

Thus 29.3 g of aluminium chloride is formed.

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I have a 4 amino acid peptide of unknown sequence with a curious titration profile around pH = 6. If Iknow that the peptide N-te
netineya [11]

Answer:

c. Histidine

Explanation:

Histidine is a compound that is normally used for the generation of protein. Three amino acids commonly have basic side chain when the pH is neutral. The conjugate acid in histidine has a pKa of approximately 6. Based on the description of the experimental analysis provided in the statement, the right option is option c.

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Down...
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Answer:

Explanation:

From the sorensen equation; pH = -Log[H+]

2.7 = -Log[H+]

H+ = 10^-2.7

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6 0
2 years ago
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Answer:The ideal gas law is represented mathematically as: PV=nRT. P- pressure, V- volume, n-number of moles of gas, R- ideal gas constant, T- temperature.

Explanation:The ideal gas law is used as a prediction of the behavior of many gases, when subjected to different conditions.

he ideal gas law has so many limitations.

An increase in the pressure or volume, decreases the number of moles and temperature of the gas.

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