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2 years ago

Determine the formula weight of caffeine, C₈H₁₀N₄O₂. Provide an answer to two decimal places.

Chemistry

2 answers:

arlik [135]2 years ago

5 0

Let's find

$\\ \tt\hookrightarrow C_8H_10N_4O_2$

We need accurate mass

$\\ \tt\hookrightarrow 8(12.011)+10(1.007)+4(14.006)+2(16.0)$

$\\ \tt\hookrightarrow 96.088+10.07+56.024+32.0$

$\\ \tt\hookrightarrow 196.182g/mol$

$\\ \tt\hookrightarrow 196.18g/mol\:or 196.18u$

Rashid [163]2 years ago

5 0

Answer:

IPO you have to be a Goodgood of you

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How many moles of oxygen molecules are present in 112ml of co2 at NTP?

dexar [7]

In each mole of carbon dioxide there will be one mole of O₂.

Let us calculate the moles of carbon dioxide gas present first

The conditions are NTP it means , Temperature = 293 K and P = 1 atm

We will use ideal gas equation

PV= nRT

Where

P = Pressure of gas = 1 atm

V= 112mL=0.112L

R= gas constant =0.0821 L atm /mol K

n = moles = ?

Putting values

$moles=\frac{PV}{RT}=\frac{1X0.112}{0.0821X293}$

moles = 0.00466

Thus moles of carbon dioxide will be 0.00466

The moles of O₂ = 0.00466

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tiny-mole [99]

Answer:

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Explanation:

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3 years ago

During Georgia’s sever drought what recreational facility was under construction

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Read 2 more answers

The empirical formula for trichloroisocyanuric acid, the active ingredient in many household bleaches is OCNCI. The molar mass o

TEA [102]

Answer:

These two are equivalent and valid:

$C_3Cl_3N_3O_3$

$Cl_3(CN)_3O_3$

Explanation:

The molecular superscripts for each atom in the molecular formula are determined by the number of times that the mass of the empirical formula is contained in the molar mass.

1. Determine the mass of the empirical formula:

$OCNCl$ :

Atomic masses:

O: 15.999g/mol
C: 12.011g/mol
N: 14.007g/mol
Cl: 35.453g/mol

Total mass:

15.999g/mol + 12.011g/mol + 14.007g/mol + 35.453g/mol = 77.470g/mol

2. Divide the molar mass by the mass of the empirical formula:

232.41g/mol / 77.470g/mol = 3

3. Multiply each superscript of the empirical formula by the previous quotient: 3

$O_3C_3N__3Cl_3$

Or:

$C_3Cl_3N_3O_3$

You might also write CN as a group:

$Cl_3(CN)_3O_3$

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