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Luden
3 months ago
8

How many moles of sodium bicarbonate is needed to neutralize 0.8 ml of sulphuric acid?

Chemistry
1 answer:
eduard [2.7K]3 months ago
6 0

Answer:

The amount of NaHCO3 needed is 9.6 E-3 moles.

Explanation:

According to the balanced equation:

  • 2 NaHCO3(s) + H2SO4(ac) ↔ Na2SO4(ac) + 2 CO2(g) + 2 H2O(l)
  • assumed concentration of H2SO4 is 6M, a common lab setup.

Thus, n H2SO4 = 0.0008 L * 6 mol/L = 0.0048 mol of H2SO4.

For every mole of H2SO4, two moles of NaHCO3 are required, leading to:

⇒ moles of NaHCO3 = 0.0048 mol H2SO4 * (2 mol NaHCO3 / mol H2SO4)

⇒ moles of NaHCO3 = 0.0096 mol.

This indicates that 9.6 E-3 mol of NaHCO3 is the minimum needed to neutralize the acid.

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A 19.3-g mixture of oxygen and argon is found to occupy a volume of 16.2 l when measured at 675.9 mmhg and 43.4oc. what is the p
KiRa [2933]
<span>The partial pressure of oxygen is 438.0 mmHg. The ideal gas equation is expressed as PV = nRT where P represents pressure, V denotes volume, n is the number of moles, R is the ideal gas constant (8.3144598 (L*kPa)/(K*mol)), and T signifies absolute temperature. To convert from Celsius to Kelvin, we have 43.4 + 273.15 = 316.55 K. For the pressure conversion from mmHg to kPa: 675.9 mmHg * 0.133322387415 = 90.11260165 kPa. When solving for n using the ideal gas equation, we derive n = PV / (RT) which provides n = 90.11260165 kPa * 16.2 L / (8.3144598 (L*kPa)/(K*mol) * 316.55 K)= 1459.824147 L*kPa / 2631.94225 (L*kPa)/(mol), resulting in n = 0.554656603 mol. Thus, we have 0.554656603 moles of gas particles. Next, we determine the contribution from oxygen. The atomic weight of oxygen is 15.999 g/mol, while argon is 39.948 g/mol, and the molar mass of O2 is 31.998 g/mol. We establish the relationships where M is the number of moles of O2, and 0.554656603 - M gives the number of moles of Ar. Setting up the equation: M * 31.998 + (0.554656603 - M) * 39.948 = 19.3, we solve for M resulting in 0.359424148 moles of oxygen out of 0.554656603 total moles. This leads to oxygen providing 0.359424148 / 0.554656603 = 0.648012024 or 64.8012024% of the total pressure of 675.9 mmHg. The partial pressure therefore calculates to 675.9 * 0.648012024 = 437.9913271 mmHg, rounded to 438.0 mmHg</span>
7 0
2 months ago
A compound composed of only carbon and chlorine is 85.5% chlorine by mass. propose a lewis structure for the lightest of the pos
lions [2927]

The visual representation is displayed in the following image.

For calculations, consider 100 grams of the compound:

ω(Cl) = 85.5% ÷ 100%.

ω(Cl) = 0.855; signifying the mass percentage of chlorine in the compound.

m(Cl) = 0.855 · 100 g.

m(Cl) = 85.5 g; this represents the mass of chlorine.

m(C) = 100 g - 85.5 g.

m(C) = 14.5 g; indicating the mass of carbon.

n(Cl) = m(Cl) ÷ M(Cl).

n(Cl) = 85.5 g ÷ 35.45 g/mol.

n(Cl) = 2.41 mol; this is the quantity of chlorine.

n(C) = 14.5 g ÷ 12 g/mol.

n(C) = 1.21 mol; this is the quantity of carbon.

n(Cl): n(C) = 2.41 mol: 1.21 mol = 2: 1.

The compound in question is identified as dichlorocarbene CCl₂.

4 0
2 months ago
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Chlorine atoms from CFC molecules speed the breakdown of stratospheric O3 in a process that is affected by both homogeneous and
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False, it's solely heterogeneous. Explanation: The degradation of the ozone layer caused by CFC molecules happens in the gaseous state since it does not involve liquids or solids at stratospheric conditions. Additionally, the reaction occurs independently as ozone is chemically unstable, eliminating the need for a catalyst.
7 0
2 months ago
a 5.00 L sample of helium expands to 12.0 L at which point the pressure is measured to be 0.720atm. what was the original pressu
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Response:

The conclusion to your inquiry is Pressure 1 = 1.73 atm

Clarification:

Data provided

Volume 1 = 5 l

Pressure 1 =?

Volume 2 = 12 l

Pressure 2 = 0.72 atm

Procedure

To resolve this issue, Boyle's law is applied

                 Pressure 1 x Volume 1 = Pressure 2 x Volume 2

-Finding Pressure 1

                 Pressure 1 = Pressure 2 x Volume 2 / Volume 1

-Replace values

                 Pressure 1 = 0.72 x 12 / 5

-Calculating

                Pressure 1 = 8.64/5

-Final outcome

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5 0
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What is the correct name for the covalent compound N3Se5?
castortr0y [3046]

Result:

I believe it’s called Trinitrogen Pentaseleniumide

Explanation:

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Penta means five

The second element concludes with -ide

6 0
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