Is the reaction shown, relating carbon dioxide and pH, a reversible process?

Answer:

Refractive index

Heat capacity

Density

Explanation:

Properties that are used to identify materials are called intensive properties. These intensive properties are characteristic of the material and does not depend on the amount of material present.

Thus, if i want to identify whether the three bars are made of the same metal, i can look out for the following properties;

Refractive index

Heat capacity

Density

These properties are intensive properties thus they can be used to identify an unknown substance.

Answer:

the volume decreases and the pressure increases.

Answer:

When you first set the water balloon on top of the jar, the air pressure outside the jar and the air pressure inside the jar are the same. ... So now there is less air, less stuff, in the jar

Explanation:

The distribution of electrons of an atom or molecule in an atomic orbital is called electronic configuration.

1. The electronic configuration of Fluorine: [He] 2s²2p⁵.

2. The electronic configuration of Neon: [He]2s²2p⁶

3. The electronic configuration of Sulfur: 1s²2s²2p⁶3s²3p⁴

4.  The electronic configuration of Calcium:[Ar] 4s²

5. The electronic configuration of Iron: [Ar] 3d⁶4s²

Hence, this is the required solution.

Answer:

The mouth begins the process of digestion by mechanically breaking food into smaller pieces.

Explanation:

Digestion is a crucial process that involves the break down of complex food molecules into simpler ones that are assimilable by the body. The process of digestion in humans, for example, is said to begin in the MOUTH where the food enters through.

The mouth via the use of teeth helps the initially break down the food particles using mechanical/physical method. This further helps the break down of the food into tiny particles before they are acted on enzymatically.

Answer:

2.68

Explanation:

Considering the definition of STP conditions, the mass of 2.15 liters of N₂ gas at STP is 2.68 grams.

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

The molar mass of substance is a property defined as its mass per unit quantity of substance. In other words, molar mass is the amount of mass that a substance contains in one mole.

You can apply the following rule of three: if by definition of STP conditions 22.4 L are occupied by 1 mole of N₂, 2.15 L are occupied by how many moles of N₂?

[tex]amount of moles of N_{2} =\frac{2.15 Lx1 mole}{22.4 L}[/tex]

amount of moles of N₂= 0.096 moles

In this case, the molar mass of N₂ is 28 g/mole.

Now, you can apply the following rule of three: If 1 mole of N₂ contains 28 grams, 0.096 moles of N₂ contains how much mass?

[tex]mass of N_{2} =\frac{0.096 molesx28 grams}{1 mole}[/tex]

mass of N₂= 2.68 grams

Finally, the mass of 2.15 liters of N₂ gas at STP is 2.68 grams.

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Answer:

TRUE

Explanation:

Answer:

It is not equal to Avogadro constant

Explanation:

This is because Avogadro constant refer to the number of molecules or atoms of particles per mile substance and thus is equal to 6.022×10^23 per mile or unit of that substance.

Answer:

Ethanol (boiling point 78°C) and methanol (boiling point 65°C) are two miscible liquids. There is only a small difference in their boiling points. These two liquids are separated from their mixture by fractional ths distillation.

When vapours of the mixture pass through the fractionating column, repeated liquefaction and vapourisation take place. Subsequently, the vapours of low boiling methanol enter the condenser from the fractionating column, condense to liquid and get collected in the round bottomed flask first. Similarly, ethanol with higher boiling point can be collected later in another round bottomed flask.

Explanation:

The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV) radiation from the sun. ... The ozone layer filters out most of the sun's harmful UV radiation and is therefore crucial to life on Earth.

Answer:

Explanation:

Let us look closely at the compound, Count the number atoms in the following compound Al(OH)3;

We shall considered the number of each atom present in this compound.

There is one atom of aluminum present

There are three atoms of oxygen present

There are three atoms of hydrogen present

Hence, there are a total of seven atoms of different elements in the compound.

Answer:

compounds are substance which can be formed by chemically combining two or more elements.

mixtures are substance that are formed by physically mixing two or more substances

Answer:

B. A Brønsted-Lowry acid donates a proton and has a matching conjugate base.

Explanation:

Here's HA is bronsted acid and its conjugate base pair is A-.

Answer:

Explanation:

The actual answer is B. The equation has an acid on one side and a base on the other. The acid donates a proton. Donates means gives up the equivalent of a proton.

Answer:

Aluminium fluoride is an ionic compound and the formation of the compound involves ionic bonding between positively-charged aluminium ions and negatively-charged fluoride ions.

Explanation:

Aluminium fluoride is an ionic compound and the formation of the compound involves ionic bonding between positively-charged aluminium ions and negatively-charged fluoride ions.

Ionic bonds are formed between two oppositely charged ions which are held together by strong electrostatic forces of attraction.

In the formation of aluminium fluoride, aluminium being a metal gives up its electrons to form the aluminium ion. Aluminium has three valence electrons which it gives up to the aluminium ion, Al³+. Fluorine, being a non-metal forms ions by accepting electrons to form the fluoride ion, F-. Fluorine has a valency of 1, hence, each fluorine atom can only accept one electron to form fluoride ions. Therefore, three fluorine atoms are required to accept the three electrons from an aluminium atoms.

With the formation of the aluminium and fluoride ions, the ions are then held together in the compound by the strong electrostatic forces of attrcation between the charges on the ions. Thus, the compound aluminium fluoride is formed.

Answer:

130.76g of Zn are needed

Explanation:

Zinc, Zn, reacts with silver nitrate, AgNO3, as follows:

Zn + 2AgNO3 → Zn(NO3)2 + 2Ag

Where 1 mole of Zn reacts with 2 moles of AgNO3

For a complete reaction of 4 moles of AgNO3 are needed:

4mol AgNO3 * (1mol Zn / 2mol AgNO3) = 2mol Zn

The mass of Zn is (Molar mass: 65.38g/mol):

2mol Zn * (65.38g / mol) =

Answer:

Energy from the question above: is converted first from gravitational potential energy, to mechanical energy, then finally to chemical energy.

Gravitational potential energy— mechanical energy— chemical energy  

Explanation:

The Lion on the clifs edge, is above the earth's surface, has its energy stored in the form of gravitational potential energy. Gravitational energy = mgh (m = mass, g = gravitational field, h = height). The lion pouncing on the deer now has mechanical energy which comprises the addition of the lion's potential energy and its kinetic energy. After consuming the deer, the energy is in chemical energy which is important to build molecules of glucose.

Answer:

Option A.

Explanation:

Balanced equation is:

2SO₂ (g) + O₂(g)  →  2SO₃(g)

First of all, we need to determine the limiting reagent. We convert mass to moles:

544.5 g . 1 mol / 64.06g = 8.5 moles of sulfur dioxide

160 g . 1mol / 32g = 5 moles of oxygen

Ratio is 1:2. 1 mol of oxygen needs 2 moles of sulfur dioxide

5 moles of oxygen may react to (5 . 2) /1 = 10 moles of SO₂

We only have 8.5 moles of SO₂ but we need 10 moles. In conclussion limiting reagent is SO₂.

Ratio is 2:2. 2 moles of SO₂ can prdouce 2 moles of SO₃

Then 8.5 moles of SO₂  must produce 3 moles of SO₃

We convert mass to moles, to determine the theoretical yield (100 % yield reaction) → 8.5 mol . 80.06 g /mol = 680.51 g

Formula for percent yield is: (Produced yield / Theoretical yield) . 100

(382 g / 680.51g) . 100 = 56.1 %

Answer:

7) 50 8)4

Explanation:

I answered the question what do you want to gave me

Answer:

A saturated solution is that which is dissolved as much solute as it is capable of dissolving. By heating the solution a saturated solution can be changed into an unsaturated solution. Without adding any solvent it can be changed into an unsaturated solution. :]

Answer:

the answer is A i learned this in class and i had the exact same question

Answer:

True i think..............

Answer:

As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.

Explanation:

As the kinetic energy of the gaseous solute increases, its molecules have a greater tendency to escape the attraction of the solvent molecules and return to the gas phase. Therefore, the solubility of a gas decreases as the temperature increases.

The statement which explains the affects to temperature to the rate is that when temperature increases, particles move faster.

Rate of any reaction gives idea about the speed of the completion of any chemical reaction.

Hence, when temperature increases, particles move faster.

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Answer:

the answer is C There is simply more collisions

To Find :

Gas’s temperature in Celsius when it has a volume of 25 L, 203 mol, 143.5 atm .

Solution :

We know, by ideal gas equation :

[tex]PV =nRT\\\\T = \dfrac{PV}{nR}[/tex]

Here, R is universal gas constant and [tex]R = 0.082 \ L \ atm \ mol^{-1} \ K^{1}[/tex]

Putting all given values and R in above equation, we get :

[tex]T = \dfrac{PV}{nR}\\\\T = \dfrac{143.5\times 25}{203 \times 0.082}\ K\\\\T = 215.52\ K[/tex]

Hence, this is the required solution.