what elements are present in alkanes? (select all that apply) group of answer choices nitrogen hydrogen oxygen phosphorous metals carbon

INFORMATION:

We know that:

- The normal boiling and freezing points of argon are 87.3 K and 84.0 K

- The triple point is at 82.7 K and 0.68 atmosphere.

And we must draw a phase diagram for argon using the data

STEP BY STEP EXPLANATION:

To draw the diagram, we must graph first the triple point since it is the common point for the three states of the argon

Then, we need to use that the normal boiling and freezing points of argon are 87.3 K and 84.0 K to divide he states of the argon in the graph

Finally, we need to show the position of the normal boiling point

So, we obtain the next graph

ANSWER:

Answer:

P=9

Explanation:

Formula: P = M/V
First, we need to find the volume. This can be done by: 5 x 3 x 2 which will give us 30

Now we can plug it in
P= 270/30

P=9!  

Explanation: a homogeneous mixture forms when two or more substances are combined to make something uniform. In this type of mixture, the components must be evenly distributed troughout. Only one state of matter can be present and you can see individual ingredients.

The mass in grams of potassium chloride that can be dissolved in water at 80 °C to create a saturated solution is 52 g; option D.

The mass in grams of potassium chloride that can be dissolved in water at 80 °C to create a saturated solution depends on the solubility of potassium chloride at 80 °C.

According to the solubility data, at 80 degrees Celsius, the solubility of potassium chloride (KCl) in water is approximately 56 grams per 100 grams of water.

Therefore, 52 grams of potassium chloride can be dissolved into water at 80 degrees Celsius to create a saturated solution.

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1. The reaction is spontaneous

2. The reaction is not spontaneous

3.The concentration of the aluminum is 0.0027 M

We know that;

Ecell = E°cell - 0.0592/nlog Q

For question 1;

Ecell = 1.53 - 0.0592/2 log (1.42/ 8.24×10-4)

= 1.43 V

The reaction is spontaneous

For question 2;

Ecell = 0 -  0.0592/2 log(1.36/0.841)

= - 0.047 V

The reaction is not spontaneous

For question 3;

2.587= 2.56 -  0.0592/6 log([Al^3+]/1.46)

2.587 - 2.56 = -  0.0592/6 log([Al^3+]/1.46)

0.027 = -  0.0592/6 log([Al^3+]/1.46)

0.027 * -(6/ 0.0592) =  log([Al^3+]/1.46)

Antilog [0.027 * -(6/ 0.0592) ) = ([Al^3+]/1.46)

[Al^3+] = Antilog [0.027 * -(6/ 0.0592) )  * 1.46

= 0.0027 M

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Answer:

Some changes that can occur in ecosystems are seasons, tide cycles, population sizes, succession, evolution, landscape changes, and climate changes.

Explanation:

The equilibrium constant of the reaction from the calculation that has been done is 0.154

The concentrations (or partial pressures) of reactants and products in chemical equilibrium for a specific chemical reaction are related by the equilibrium constant (K), a mathematical equation. It quantifies the degree to which an equilibrium has been reached in a reaction.

We have the equation of the reaction as;

A(g) + B(g) ⇔C(g)

Thus;

Keq = 45.83/11.23 * 26.50

Keq = 0.154

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Answer: False

Explanation:

Potassium chloride and iron III hydroxide are produced through the reaction of iron III chloride and potassium hydroxide.

A potassium salt used to treat hypokalemia is potassium chloride. a white crystal or crystalline powder used in buffer solutions, fertilizers, explosives, the treatment of hypokalemia, replenishing electrolytes, and other applications.

It is a kind of electrolyte that supports cardiac control, muscular contraction, neuron function, and more. Low potassium levels can be treated with a supplement called potassium chloride. Hypokalemia, which can be dangerous, can be brought on by low potassium.

Potassium chloride used intravenously is not without risk. Injecting it too quickly or using a large dose could result in cardiac arrest within minutes. Virtually any arrhythmia may be seen as a result of hyperkalemia's complicated effects on the heart.

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Answer:

I think the answer is 275 grams TiO2

Explanation:

So multiply: 1.25 mol TiO2 times 220.38 = 275.475

So I rounded it to 275 grams and i hope that I helped you out

Combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.

CₓHₐ + O2 → CO2 + H2O Since the combustion is complete, so the total mass of the reactants is equal to the total mass of the reactants Therefore, Mass of O2 = (17.9 + 9.14) – 5.9 = 21.14 grams Here, the empirical formula for the hydrocarbon is CₓHₐ. So, now we have to need to determine the number of moles of the O2, CO2, and H2O :- Mole of CO2 = 17.9/44 = 0.4068 Mole of H2O = 9.14/18 = 0.5078 Mole of O2 = 21.14/32 = 0.6606. The empirical formula for the compound containing uranium and fluorine is UF6. Explanation: The empirical formula of a compound represents the lowest whole number ratio of elements in the compound. This ratio is represented by subscripts in the formula. by this information, we can consider that combustion analysis of fluorene, a polycyclic aromatic hydrocarbon used to make dyes, plastics, and pesticides, produces 11.44 g CO2 and 1.80 g H2O. The empirical formula of fluorene C₆H₄.

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Answer:

that can be established only by changing a substance's chemical

Explanation:

Answer:

A chemical property is a characteristic of a substance abserved in chemical reactions.

Explanation:

Some major chemical properties include flammability, toxicity, heat of combustion, pH value, rate of radioactive decay, and chemical stability.

Answer: We would know whether an animal undergoes sexual reproduction if two parents are involved.

Answer:

False

Infered from the equation:

Density=\(\frac{Mass}{Volume}\)

So it has no relation with weight of substance

Answer:

mid-ocean ridge.

Explanation:

Carbonated water is used makes sprite a substitute for egg in baking

Carbonated water can add moisture to recipes, but it also works as a great leavening agent

What is carbonated water ?

Carbonated water (soda water, bottled water, sparkling water, club soda, gassed water, also known as bottled water in many places, especially in the United States as seltzer or seltzer water) contains dissolved carbon dioxide. It is also water containing gas. It is artificially injected under pressure or occurs by natural geological processes. Carbonation creates tiny bubbles, giving the water a carbonation quality. Common forms include sparkling natural mineral water, club soda, and commercial sparkling water.

Carbonated water can add moisture to recipes, but it also works as a great leavening agent. Carbonation traps air bubbles and makes the finished product light and fluffy. You can substitute 60 grams of sparkling water per egg. This alternative is great for cakes, cupcakes and quick breads

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The name of the polyatomic ion ClO2 is chlorite. Chlorite is a negatively charged polyatomic ion with a chemical formula of ClO2-. It is composed of one chlorine atom and two oxygen atoms.

Chlorite is an intermediate in the oxidation of chlorine dioxide to chlorate and has several industrial uses, including water treatment and paper bleaching. In addition to its industrial applications, chlorite is also used in the laboratory as a reagent in analytical chemistry. When naming polyatomic ions, it is important to recognize the prefixes and suffixes used to indicate the number of atoms and their respective charges. For example, the -ite suffix is used to indicate a polyatomic ion with one less oxygen atom than the -ate ion, while the -ate suffix is used to indicate the most common polyatomic ion of a given element. Understanding the naming conventions for polyatomic ions is important for students of chemistry as it enables them to accurately communicate chemical formulas and reactions.

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Answer:

2H₂O → 2H₂ + O₂

         2NaCl → 2Na + Cl₂

Explanation:

         2H₂O → 2H₂ + O₂

         2NaCl → 2Na + Cl₂

The reactions shown above is a decomposition.

In a decomposition reaction or cracking, two or more products are formed from a single product.

The breakdown of a compound into its components as individual elements or other compounds falls into this category of reactions.

Cracking is a sort of decomposition reactions that is used in petroleum industries to sort the fractions of a compound.

Answer:

(d) on the left side ,because it is a reactant.

Answer:

(D) On the left side, because it is a reactant.

The total ions which would be present in indium fluoride is +2

It follows that indium is an element which has an ion of +3 while fluorine has +1 ion. So therefore, adding these two ions together in the formula of this compund indium fluoride is given below:

+3 + (-1)

= +3 - 1

= +2

That being said, this indium fluoride has a number of properties. Some of it few properties are as follows:

In conclusion, it can be deduced from the explanation above that indium fluoride is a compound.

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Answer:

When heat transfers

Explanation:

Contact heat transfer in a easy way to explain it

Conduction is the transfer of energy in the form of heat or electricity from one atom to another within an object by direct contact. Conduction occurs in solids, liquids, and gases. However, solids transfer energy most efficiently since the molecules in solids are most tightly packed, and the molecules are closer together, as shown in this figure. For liquids and gases, the density of the particles are generally lower than those of solids and the particles are farther apart, so the energy transfer is less efficient.

There are two main types of conduction:

Conduction of heat occurs when molecules increase in temperature; they vibrate, and this vibration and movement passes the heat energy to the surrounding molecules. Some examples of conduction of heat are accidentally touching a hot pot, or when a heating pad is applied to you directly and warms your muscles.

Conduction of electricity occurs due to the movement of electrically charged particles through a medium. This movement can result in an electric current, which may be carried by electrons or ions. An example of electrical conduction is when you accidentally get electrocuted when you touch a live wire because your body contains water, which is a conductor of electricity. Another example is when electricity passes through wires, which are conductors, so we can watch TV or use a computer.

The picture on the left shows what happens if you leave a metal spoon inside a cup with hot liquid. The spoon is at room temperature at first when we touch it, but as the spoon has longer contact with the hot water, the spoon becomes hot to the touch. This is because the heat from the liquid is transferred to the spoon due to conduction of heat. The picture on the right shows a light bulb that is turned on because electricity travels through the wires due to the conduction of electricity.

Answer:

23 because the atomic number is base on protons and electrons and the neutrons is 20 hope it help

Answer:

Explanation:

hope it's helpful

The concentration of the HF solution is  0.03.

We know that the concentration has to do with the amount of the substance that is present in the system. We know that what we have is an acid hence we can only talk about the concentration of the acid if we can obtain the amount of the hydrogen ion.

We know that the acid is defined as any substance in which there is the presence of the hydrogen ion is what we call and acid. Since the hydrogen fluoride does have the hydrogen, we can say that the substance that we are dealing with here is an acid.

Thus;

pH = 14 - pOH

pOH = hydroxide ion concentration

pH = hydrogen ion concentration

pH = 14 - 12.5

= 1.5

[HF]  = Antilog (-1.5)

= 0.03

The acid would have a concentration of  0.03.

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Answer:

0.350cm³

Explanation:

to obtain volume, divide density by

3.1÷8.86

0.350ml

1ml=1cm³

0.350ml=0.350cm³

Answer:

3.2 moles of H2SO4

Explanation:

We need to start with a balanced equation.  Lets assume the sulfuric acid is formed from sulfur dioxide and water.

   SO2 + H2O = H2SO4

This equation is balanced.  (Check it)

It tells us that 1 mole of SO2 will form 1 mole of H2SO4, if the reaction proceeds as planned.  That's a molar ratio of 1 to 1.  They are equal.  What moles we react, we should expect the same number of moles of product.  [And we need 1 mole of water at the same time]

So if we react 3.20 moles of sulfur dioxide, and keep out lab partner back, we'll obtain 3.2 moles of H2SO4.

The pressure of the NH3 gas is 2.19 atm, a sample of 4.30 moles of NH3 gas occupies 6.50 L at 45°C.

Gas pressure is the force per unit area exerted by a gas on the walls of its container. It is a measure of the number of gas molecules colliding with the container's walls per unit of time, and is proportional to the number of gas molecules and their kinetic energy. It is a result of the gas molecules moving randomly in all directions and colliding with the walls of the container. When a gas is confined in a container, its pressure is exerted equally in all directions. The pressure is a scalar quantity, which means it has only magnitude and does not have a direction.

Gas pressure can be measured in a variety of units, including atmospheres (atm), torr, pascals (Pa), and pounds per square inch (psi). The most commonly used units for measuring gas pressure are atmospheres and pascals.

To calculate the pressure of a gas, the Ideal Gas Law is used which states that \(PV = nRT\), where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First step:  Convert the temperature from Celsius to Kelvin:

45°C + 273.15 = 318.15 \(K\)

Second step:Plug in the values and solve for P:

\(P = (nRT) / V\)

\(P = (4.30 moles * 0.0821 Latm/molK * 318.15 K) / 6.50 L\)

\(P = 2.19 atm\)

So, the pressure of the \(NH3\) gas is 2.19 \(atm\).

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J.J. Thomson established the plum pudding model of an atom and discovered the electron as a result of his cathode ray tube research.

The electric discharge of a cathode ray tube was extensively researched by scientists. The crucial part was Thomson's interpretation. He interpreted the rays' deflection by the charged plates and magnets as proof of "things far smaller than atoms." Thomson determined that these bodies had a high charge-to-mass ratio and calculated the charge's actual value.

A concept of the atom as a sphere of positively charged matter with electrons positioned according to electrostatic forces was put forth by Thomson in 1904 which is now known as the plum pudding model. He not only found the electron but also concluded that it was a crucial component of an atom.

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