How many grams of C are there in 0.234 moles of caffeine?

HELP 20 Points? thank u guysssss

Fudgin [204]

Answer:

The answer is A. Chemical

Explanation:

Have a nice day

3 0

3 years ago

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What is the volume of 60 g of ether if the density of ether is 70 g/mL

NNADVOKAT [17]

V = 60.0 g/ 0.70 g/mL = 85.7 mL Hope this helps! ;D

4 0

4 years ago

The equation most often associated with Newton's Second Law of Motion is

nignag [31]

Answer:

F = ma or Force = mass x acceleration.

Explanation:

Newtons second law is about the force put onto an object. To find this you would use the formula:

Force is equal to mass times acceleration (F=ma)

7 0

3 years ago

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Find the fugacity coefficient of a gaseous species of mole fraction 0.4 and fugacity 25 psia in a mixture at a total pressure of

Oksana_A [137]

Answer: The fugacity coefficient of a gaseous species is 1.25

Explanation:

Fugacity coefficient is defined as the ratio of fugacity and the partial pressure of the gas. It is expressed as $\bar{\phi}$

Mathematically,

$\bar{\phi}_i=\frac{\bar{f_i}}{p_i}$

Partial pressure of the gas is expressed as:

$p_i=\chi_iP$

Putting this expression is above equation, we get:

$\bar{\phi}_i=\frac{\bar{f_i}}{\chi_iP}$

where,

$\bar{\phi}_i$ = fugacity coefficient of the gas

$\bar{f_i}$ = fugacity of the gas = 25 psia

$\chi_i$ = mole fraction of the gas = 0.4

P = total pressure = 50 psia

Putting values in above equation, we get:

$\bar{\phi}_i=\frac{25}{0.4\times 50}\\\\\bar{\phi}_i=1.25$

Hence, the fugacity coefficient of a gaseous species is 1.25

8 0

3 years ago

All of the following equations are statements of the ideal gas law except

evablogger [386]

Answer:

The first equation, a. PV = nRT, is not a valid statement of the ideal gas law.

Explanation:

The basic expression for the ideal gas law is:

$pV=nRT$ .......... [Equation 1]

Where:

n is the number of moles of the gas

V is the volume occupied by the gas

p is the pressure exerted by the gas molecules

T is the temperature in absolute scale (Kelvin)

R is the Universal gas constant (0.0821 atm-liter /K-mol or the equivalents in other units)

You can perform different algebraic operations to obtain equivalent equations:

Choice b) Divide equation 1 by T and you get:

pV / T = nR, which is the choice b. from your list.

Choice c) Divide equation 1 by n × V and you get:

p/n = RT / V, which is the choice c. from your list.

Choice d) Divide equation 1 n × T and you get:

pV / (nT) = R, which is the choice d. from your list.

The choice a. p = nRTV states that p and V are in direct relation, when the ideal gas law states that p and V are inversely related, so that equation is wrong.

Conclusion: the choice a, p = nRTV, is not a statement of the ideal gas law.

3 0

3 years ago