How many moles of propane
react when 294 g of CO2 form?

C3H8 +502 → 3CO₂ + 4H₂O

Explanation:

You may not realise it, but you come across aldehydes and ketones many times a day. Take cakes and biscuits, for example. Their golden, caramelised crust is formed thanks to the Mailliard reaction. This is a process that occurs at temperatures above 140° C, when sugars with the carbonyl group in foods react with nucleophilic amino acids to create new and complex flavours and aromas.

Another example is formaldehyde. Correctly known as methanal, it is the most common aldehyde in industry. It has multiple uses, such as in tanning and embalming, or as a fungicide. However, we can also react it with different molecules to make a variety of more useful compounds. These include polymers, adhesives and precursors to explosives. But how do aldehydes and ketones react, and why?You should remember from Aldehydes and Ketones that they both contain the carbonyl functional group , . This is a carbon atom joined to an oxygen atom by a double bond. Let's take a closer look at it.

If we compare the electronegativities of carbon and oxygen, we can see that oxygen is a lot more electronegative than carbon.

Answer:

CsCl

Explanation:

The ionic species are:

           Cs⁺   and Cl⁻

(c) 2AgNO3 + Ni --> Ni(NO3)2 + 2Ag

Answer:

Chemical formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. If a compound's chemical formula cannot be reduced anymore, then the empirical formula is the same as the chemical formula.

please give me brainliest

Answer:

Sink

Explanation:

For a substance to float in water, it must be less dense than water. The density of water is 1 g/cm^3. To find the density of the substance, we can do mass/volume, which in this case is 25g/7cm^3. We see that [tex]25/7 > 1[/tex], so the substance would sink.

Answer:

Like Saturn, Uranus has rings and moons. But unlike Saturn — and indeed every other planet in the solar system — the ice giant is tipped on its side. In other words, rather than spinning like a top as it circles the sun, Uranus rolls around on its side.

Explanation:

Temperature affects both physical and chemical change because it modifies the state of matter and also it alters the rate of chemical reactions.

Temperature affects physical properties by increasing the motion of constituent atoms and thus altering the state of matter.

Moreover, in a chemical reaction, an increase in temperature also affects the conversion rate of a reactant to one or more products.

In conclusion, temperature affects both physical and chemical change because it modifies the state of matter and also it alters the rate of chemical reactions.

Learn more about temperature effects here:

https://brainly.com/question/17928400

#SPJ1

Answer: Hypothalamus

Explanation:

The hypothalamus controls body temperature by sending signals to muscles, organs, glands, and other components of the nervous system when it becomes too low or too high. These structures then help in returning the body temperature to normal.

Answer:

The air flow carries away the carbon dioxide formed during the decomposition. Once accumulated in the furnace or if the air was not allowed to stream through, it begins to react again with the newly formed calcium oxide, equilibrating rather than completing the reaction.

Answer: 40. mol (to 2 sf)

Explanation:

Since there are 9 oxygen atoms in every molecule of aluminum nitrate, this means that there are 9 moles of oxygen atoms in each mole of aluminum nitrate.

So, in 4.4 moles, there are 9(4.4) = 40. mol (to 2 sf)

Answer:

223 g O₂

Explanation:

To find the mass of oxygen gas needed, you need to (1) convert moles Al to moles O₂ (via the mole-to-mole ratio from reaction coefficients) and then (2) convert moles O₂ to grams O₂ (via the molar mass). When writing your ratios/conversions, the desired unit should be in the numerator in order to allow for the cancellation of the previous unit. The final answer should have 3 sig figs because the given value (9.30 moles) has 3 sig figs.

4 Al + 3 O₂ ----> 2 Al₂O₃
^         ^

Molar Mass (O₂): 32.0 g/mol

9.3 moles Al          3 moles O₂              32.0 g
-------------------  x  ---------------------  x  --------------------  =  223 g O₂
                              4 moles Al               1 mole

No, all wavelengths/photons of light are emitted from excited electrons.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

When an atom's electrons move to a lower energy state, the atom releases energy in the form of a photon. Depending on the energy involved in the emission process, this photon may or may not occur in the visible range of the electromagnetic spectrum.

Hence, no, all wavelengths/photons of light are emitted from excited electrons.

Learn more about the wavelength here:

https://brainly.com/question/14644152

#SPJ1

The yeast was not able to metabolize the sugar in black coffee and so, no carbon dioxide was produced.

Yeast metabolizes sugar or glucose to produce alcohol and carbon dioxide.

The carbon dioxide produced is responsible for the raising action of yeast on dough and for the inflation of the balloon.

In the experiment, the possible reason why the balloon did not inflate is that the yeast was not able to metabolize the sugar in black coffee and so, no carbon dioxide was produced.

Learn more about yeast action on sugar at: https://brainly.com/question/27389229

#SPJ11

Answer:

49 moles of atoms

Explanation:

There are 7 individual atoms in each molecule of H2SO4:  (2 hydrogens + 1 sulfur + 4 oxygens).

Therefore, if 7 moles are decomposed, there would be 7 times that amount of individual atoms:

7 x 7 = 49 moles of atoms

Reduction involves the either the addition of hydrogen and removal of oxygen.

Reduction involves the removal of oxygen.

This implies there is a loss of oxygen in reduction.

This can be represented in the extraction of iron from it ores.

Fe₂O₃ + 3CO →  2Fe + 3CO₂

Reduction is also the addition of hydrogen. This implies it is the gain of hydrogen.

For example

CH₃CHO → CH₃CH₂OH

learn more on reduction here: https://brainly.com/question/9485345

#SPJ12

You could say either protons or neutrons.

According to the label the true statement about the following substance is option c. It does not pose a health risk

Specially designed labels with particularly specialised adhesive qualities are called "lab labels." In the pharmaceutical or medical industry, as well as in laboratories, they are used for labelling. For the labelling of tubes, test tubes, blood bags, and other types of vessels, special laboratory labels are created.

Labels on chemicals

The identify of the hazardous chemical(s) in the container (for example, chemical name) and the dangers present must both be listed on this label. This warning about hazards can be distributed in a variety of ways. Employers want to choose a solution that will function in each place.

The following label indicates that the chemical does not pose a health risk.

Learn more about lab labels here https://brainly.com/question/14459928

#SPJ10

Answer:

Table salt+water

Explanation:

When hydrochloric acid and sodium hydroxide interact it results in the formation of salt and a release of heat. The result of these 2 highly aggressive compounds is table salt and water. (Compounds that are ultimately harmless, even beneficial to us human beings)

Hope i helped

Answer: C

Explanation:

A) There is 1 fewer hydrogen atom.

B) There are 2 fewer carbon atoms.

D) There is 1 extra hydrogen atom.

Aristotle and Democritus (to some extent) view that matter is infinitely divisible was considered correct for most of the last two millennia

Anything that occupies space and have some mass is known as matter.

Aristotle believed that everything was comprised of earth, air, water, and fire, which were infinitely divisible.

Democritus stated that matter was subdivided into indivisible and immutable particles that created the appearance of change when they joined and separated from others.

Learn more about Matter here ;

https://brainly.com/question/17268444

#SPJ1

Answer:

halogen

Explanation:

group 17 contains halogens

Answer:

The group 17 falls int he halogen category the element most likely Fluorine Chlorine Bromine Tennessine

Explanation:

Explanation:

A physical change is one which can be reversed.it also does not produce any new substance.

changes in state such as the melting of a solid, the freezing and vaporization of a liquid as well as changes In shape are examples of physical changes

Answer:

1. Oxygen - 46.1%

2. Silicon - 28.2%

3. Aluminium - 8.23%

4. Iron - 5.63%

5. Calcium - 4.15%

6. Sodium - 2.36%

7. Magnesium - 2.33%

8. Potassium - 2.09%

9. Titanium - 0.565%

10.Hydrogen -0.140%

Explanation:

please mark me brainlist

Answer:

?? what i dont understand

The reaction that would result in decreased entropy is : ( A ) CO(s) → CO2(g)

Reactions that absorb heat from its surroundings are known as endothermic reactions, Endothermic reactions result in a decreased entropy as the temperature of the surrounding becomes lower than the temperature of the container where the reaction occurs.

Examples of endothermic reactions are : melting and evaporation which results in the change of state from solid to liquid or from solid to gaseous state.

Hence we can conclude that The reaction that would result in decreased entropy is : ( A ) CO(s) → CO2(g)

Learn more about endothermic reactions : https://brainly.com/question/10508226

#SPJ1

The evidence indicate that the reaction has occurred between ions i.e, change of state of the reactants, e.g. precipitation.

In an aqueous solution, precipitation is the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution.

The reaction of the ions can be checked by a number of methods.

In a chemical reaction, the ions are in the acqeuos solution which means that they are in solution, dissolved with charge.

During the reaction (ionic) there is an attraction between the positive and negative ions.

This makes a change in the state of the reactants in the products.

In addition, the reaction can result in an immediate observable change such as the formation of a solid or precipitation.  

Learn more about precipitaion reaction here ;

https://brainly.com/question/24158764

#SPJ1

Answer:

For a particular chemical reaction, the enthalpy of the reactants is -400 kJ. The enthalpy of the products is -390 kJ. The entropy of the reactants is 0.2 kJ/K. The entropy of the products is 0.3 kJ/K. The temperature of the reaction is 25oC. What can you conclude about this reaction?

It is exergonic

It is endergonic

it is a redox reaction

It is being catalyzed by an enzyme

Answer:

Engineers and scientists both use methods of science and facts.

Explanation:

They often use Math and computer in calculations.

Answer:

Scientists and engineers both use the facts and methods of science, and both often use MATH and COMPUTERS in their work.

Explanation:

Answer: Are people happier if they have more spare time?

Explanation:

Happiness cannot be measured quantitatively.