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3 years ago

Which is an example of a three

Chemistry

2 answers:

malfutka [58]3 years ago

6 0

Answer:

It's A. 120 cubic meters

Minchanka [31]3 years ago

4 0

It’s a.120 cubic meters

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2.4 moles of a gas in a balloon has a pressure of 4.0 atm at 373K. What is the volume of the gas?

leva [86]

Answer:

To find the volume of the gas. So if you have the amount of gas in moles. So the first step is to multiply the amount of moles that is 2.4 with liters to find the answer.

Explanation:

5 0

3 years ago

A simple equation relates the standard free‑energy change, ΔG∘′, to the change in reduction potential. ΔE0′. ΔG∘′ = −nFΔE0′ The

MA_775_DIABLO [31]

Answer : The value of standard free energy is, -152.4 kJ/mol

Explanation :

The given balanced cell reaction is:

$FADH_2+\frac{1}{2}O_2\rightarrow FAD+H_2O$

The half reaction will be:

Reaction at anode (oxidation) : $FADH_2\rightarrow FAD+2H^++2e^-$ $E^0_{Anode}=+0.03V$

Reaction at cathode (reduction) : $\frac{1}{2}O_2+2H^++2e^-\rightarrow H_2O$ $E^0_{Cathode}=+0.82V$

First we have to calculate the standard electrode potential of the cell.

$E^o=E^o_{cathode}-E^o_{anode}$

$E^o=(+0.82V)-(+0.03V)=+0.79V$

Relationship between standard Gibbs free energy and standard electrode potential follows:

$\Delta G^o=-nFE^o_{cell}$

where,

$\Delta G^o$ = standard free energy = ?

n = number of electrons transferred = 2

F = Faraday constant = $96.48kJ.mol^{-1}V^{-1}$

$E^o_{cell}$ = standard electrode potential of the cell = 0.79 V

Now put all the given values in the above formula, we get:

$\Delta G^o=-(2)\times (96.48kJ.mol^{-1}V^{-1})\times (0.79V)$

$\Delta G^o=-152.4kJ/mol$

Therefore, the value of standard free energy is, -152.4 kJ/mol

8 0

3 years ago

Hydrogen reacts with 0.771 g of carbon to form 0.90 g of a compound. What is the mass percent of hydrogen in the compound

morpeh [17]

Answer: 14.3%

Explanation: In order to find the mass percent of hydrogen in this compound, you must determine how many grams of hydrogen you'd get in 100 g of compound.

In your case, you know that an unknown mass of hydrogen reacts with 0.771 g of carbon to form 0.90 g of hydrocarbon, which is a compound that contains only carbon and hydrogen.

Use the total mass of the hydrocarbon to determine how many grams of hydrogen reacted with the carbon.

Now, if 0.90 g of this compound contain 0.129 g of hydrogen, it follows that 100 g of this compound will contain.

So, if 100 g of this compound contain 14.33 g of hydrogen, it follows that the mass percent of hydrogen is 14.3%

4 0

3 years ago

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ANSWER ASAP thanks

weqwewe [10]

Answer:

Option D: it's ability to lose electrons

Explanation:

Alkali metals are usually discovered in nature. They have highly reactivity at STP conditions (standard temperature and pressure conditions) and easily lose their outermost electron to form positive ions known that have a charge of +1.

Thus, what can determine the extent of reactivity of an alkali metal, is it's ability to lose electrons

5 0

2 years ago

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Read the excerpt from "The Speech."

Y_Kistochka [10]

Answer:

it's quickly moved

Explanation:

whisk

/(h)wisk/

Learn to pronounce

verb

past tense: whisked; past participle: whisked

take or move (someone or something) in a particular direction suddenly and quickly.

Hope this helps ^^

5 0

2 years ago

Read 2 more answers