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4 years ago

What is the volume of 8.45 grams of carbon dioxide at a pressure of 589 mmHg and a temperature of 10 c

1 answer:

8 0

This is a PV=nRT problem, commonly known as ideal gas. For this, we simply need to take what we know and plug it into the equation

Pressure x Volume = moles x ideal gas constant x tempature.

We know our pressure is 589mmHg so we can plug that in. The volume is unknown.

Then, we need to convert 8.45g of CO2 to moles. That is the grams to moles stoichiometry problem. I will not solve the problem for you, however I can set it up for you:

8.45gCO2 1 mole CO2
-------------- x --------------
1 44.01g CO2

At this point, we now have 589 x X= moles.
The ideal gas constant for mmHg should have been given to you, it is 62.4.

Then, we need to convert from celcius to kelvin. To do this, we simply add 273 to 10, since 273 is the standard unit for kelvin.

Now that we have all of our units, we can plug them into the PV=nRT formula, and solve. We are finding the V, so therefore to find it, the P (pressure) needs to equal the nRT. We would multiple nRT together to get an answer, and divide by the pressure to get the missing unit. To make sure you got the right answer, multiply P and V together to see if it equals nRT. And don't forget to round to the least number of sig figs! Hope I could be of help!

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Use the following half-reactions to construct a voltaic cell:

velikii [3]

Answer: The correct answer is $3Ag^+(aq.)+Cr(s)\rightarrow 3Ag(s)+Cr^{3+}(aq.);E^o_{cell}=+1.53V$

Explanation:

We are given:

$Cr^{3+}(aq.)+3e^-\rightarrow Cr(s);E^o=-0.73V\\\\Ag^+(aq.)+e^-\rightarrow Ag(s);E^o=+0.80V$

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction. Here, silver will always undergo reduction reaction will get reduced.

Chromium will undergo oxidation reaction and will get oxidized.

The half reactions for the above cell is:

Oxidation half reaction: $Cr(s)\rightarrow Cr^{3+}+3e^-;E^o_{Cr^{3+}/Cr}=-0.73V$

Reduction half reaction: $Ag^{+}+e^-\rightarrow Ag(s);E^o_{Ag^{+}/Ag}=0.80V$ ( × 3)

Net equation: $3Ag^+(aq.)+Cr(s)\rightarrow 3Ag(s)+Cr^{3+}(aq.)$

Oxidation reaction occurs at anode and reduction reaction occurs at cathode.

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

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

Putting values in above equation, we get:

$E^o_{cell}=0.80-(-0.73)=1.53V$

Hence, the correct answer is $3Ag^+(aq.)+Cr(s)\rightarrow 3Ag(s)+Cr^{3+}(aq.);E^o_{cell}=+1.53V$

4 0

3 years ago

Atrial natriuretic peptide is a hormone that controls blood pressure in part by increasing the urinary excretion of sodium. True

mariarad [96]

Answer:

The answer is "true"

Explanation:

ANP, or ANF, is a human peptide hormone, that controls your blood pressure, a cardiac atrium secretion hormone. It response primarily to the volume and stress expansion of the auricles and ventricles.

ANP's main function decreases the amount of increased extracellular fluid by increasing renal excretion.
This hormone is primarily developed by cardiovascular myocytes and, emanates from the wall tension locally, that's why the given statement is true.

4 0

3 years ago

Algae and other phytoplankton are the major producers of the earth's:

vredina [299]

Answer:

oxygen

Explanation:

pls mark me brainliest right

4 0

3 years ago

In an oxidation–reduction reaction, what happens to the electrons in the oxidation process? A. Electrons are bonded. B. Electron

DanielleElmas [232]

Answer: C. Electrons are lost.

Explanation:

The oxidation reduction reaction is between oxidizing agent and reducing agent.

The oxidizing agent gains electrons and reduction process occurs to it, while the reducing agent losses electrons and oxidation process occurs to it.

oxidizing agent + ne → product "reduction process, gain electrons"

reducing agent → product + ne "oxidation process, loss electrons"

Thus, The right answer is: in the oxidation process, electrons are lost.

7 0

3 years ago

Read 2 more answers

Static electricity is produced when _____.

lbvjy [14]

Answer:

Atoms gain or lose electrons

Explanation:

6 0

3 years ago