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3 years ago

Using the phase diagram for CO2, what phase is carbon dioxide in at -70°C

Chemistry

2 answers:

ElenaW [278]3 years ago

3 0

Answer:

Explanation:

The Phase Diagram of Carbon Dioxide

At 1 atm, therefore, solid CO2 sublimes directly to the vapor while maintaining a temperature of −78.5°C, the normal sublimation temperature. Solid CO2 is generally known as dry ice because it is a cold solid with no liquid phase observed when it is warmed.

Lilit [14]3 years ago

3 0

its a gas phase because... it is

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Magnesium is able to ____ copper, and copper is able to ____ magnesium.

sveticcg [70]

Answer:

Explanation:

The oxidation reduction reactions are called redox reaction. These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Oxidizing agents:

Oxidizing agents oxidize the other elements and itself gets reduced.

Reducing agents:

Reducing agents reduced the other element are it self gets oxidized.

In given example,

Magnesium is able to reduced the copper and copper is able to oxidized the magnesium.

Zinc is able to oxidized the magnesium and magnesium is able to reduced the zinc.

Copper is able to oxidized the zinc and zinc is able to reduced the copper.

4 0

3 years ago

Ca(MnQ4)2 molar mass

Allisa [31]

Answer:

I think u mean molar mass of ca(Mno4)2

if so it is 277.949 g/ mol

8 0

3 years ago

ASAP for brainlist first correct question

Ghella [55]

The second law of thermodynamics states that in a reversible process, the entropy of the universe is constant, whereas in an irreversible process, such as the transfer of heat from a hot object to a cold object, the entropy of the universe increases

8 0

3 years ago

Although both N2 and 02 are naturally present in the air we breathe, high levels of NO and NO2 in the atmosphere occur mainly in

joja [24]

Answer:

(a) Increasing the temperature adds heat which is a reactant shifting the equilibrium rightwards.

(b) Pressure has no effect since the change in the number of moles is zero.

Explanation:

Hello,

In this case, one could represent the given reaction as:

$N_2(g)+O_2(g)+ \Delta _rH \leftrightarrow 2NO$

Since it is endothermic. Thus, solving the (a) statement, one identifies the heat as a reagent, that is why the reaction cools down as it progress, therefore, by increasing the temperature, heat is added, that is, a reagent is added, which shifts the equilibrium rightwards, in other words, more NO is produced so its concentration increases.

Furthermore, for the (b) statement, since the change in the number of moles is zero, based on the stoichiometric coefficients as shown below:

$\Delta \nu =2-1-1=0$