how many g of sulfur are needed to react completely with 246 g of mercury to make hgs?

Answer:

Combustion

Explanation:

The number of electrons, protons, and neutrons in argon is 18, 18 , and 22 respectively, the number of electrons , protons and neutrons in sulphur-32 is 16, 16, 16 respectively. The number of protons, neutrons, and electrons are 6 , 8 and 6. And for uranium-238 , 92 protons , 92 electrons and 146 neutrons.

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Answer:

8 protons

The number of protons tell us what type of element an atom is.

Correct Answer: 0.01g

The scales and balances have various divisions and units that define the accuracy of the measurement system. The smallest division on the balance scale is 0.001 gm. This, option D is correct.

Scales have been defined as the measurement system that estimates the quantity of the various substances in various units including, centimeters, meters, kilograms, grams, milligrams, liter, milliliters, etc. These units are interconvertible.

1 gram is the while part of the gram unit, 0.1 shows one-tenth part of the gram, 0.01 shows the one-hundredth part of the gram, and 0.001 shows the thousandth part of the gram. one gram is the largest number on the scale and 0.001 gm is the smallest number on the balance.

Therefore, option D. 0.001 gm is the smallest number.

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There are 0,419 moles of glucose in a sample that weights 75.5g.

To calculate the amount in moles of glucose in 75.5g, we first need the molar mass of this compound. To calculate that I'll be using the following atomic mass values:

C: 12

H: 1

O: 16

To calculate the molar mass, we multiply the number of atoms by the respective atomic mass:

(6 * 12) + (12 * 1) + (6 * 16) = 180 g/mol

Since the molar mass is 180 g/mol, we know that each mol has 180 g of glucose:

1 mol glucose ---------- 180g glucose

x --------------------------- 75.5g glucose

Solving for x, we have x = 0.419 moles of glucose

Partial pressure of the gas B is 0.23 atm.

Let us note that if there is a mixture of gases that can be found in a particular vessel then we must know that each of the gases that are there would exert its own pressure on the walls of the container.

Now we know that the total number of moles that is present =

2.5 + 1.2 + 1.0 = 4.7 moles. The total pressure of the gases that we have in the system is about 0.9 atm.

We know that;

Partial pressure = Mole fraction * Total pressure

Partial pressure of B is;

1.2/4.7 * 0.9

= 0.23 atm

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According to the equation, it is necessary 3 moles of H2 to react with 1 mol of N2.

In this case, if we have 3 moles of H2 and 2 moles of N2, the limiting reactant will be the hydrogen (H2).

Answer:

a.substitution

Explanation:

because one of the hydrogen atoms from the methane is replaced with a bromine atom.Alkanes undergo a substitution reaction with halogens in the presence of light. For example, in ultraviolet light , methane reacts with halogen molecules such as chlorine and bromine. This is a substitution reaction because one of the hydrogen atoms from the methane is replaced by a bromine atom.

Answer:

848.4 moles of Co

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

If you combine the results of this question with the results from question 3B, what do you know about the total pH change caused by adding the last 0. 1 mL of HNO3 it is now an acid.

A chemical that gives off hydrogen ions in water and forms salts by combining with certain metals. Acids have a sour taste and turn certain dyes red. Some acids made by the body, such as gastric acid, can help organs work the way they should. An example of an acid is hydrochloric acid.Nitric acid is a nitrogen oxoacid of formula HNO3 in which the nitrogen atom is bonded to a hydroxy group and by equivalent bonds to the remaining two oxygen atoms.

Nitric acid is made by reaction of nitrogen dioxide ( NO 2) with water. The net reaction is: 3 NO 2 + H 2O → 2 HNO 3 + NO. Normally, the nitric oxide produced by the reaction is reoxidized by the oxygen in air to produce additional nitrogen dioxide.

pH may be defined as a measure of free acidity. More precisely, pH is defined as the negative log of the hydrogen ion concentration. The range of pH extends from zero to 14. A pH value of 7 is neutral, because pure water has a pH value of exactly 7.

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Ammonia gas will diffuse faster than hydrogen chloride gas because the relative molecular mass of ammonia is smaller than that of hydrogen chloride.

According to Graham's law, the diffusion rate of gases is inversely proportional to the square root of their molecular weights.

Thus, the lower the molecular weight of a gas, the faster it will diffuse.

The molecular weight of ammonia is 17 while that of hydrogen chloride is 36.5. Thus, ammonia will diffuse faster than hydrogen chloride.

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Answer:

B, liquid to solid.

Explanation: Since heat is being released, the particles for H2O would clump up. Heat is basically being taken out.

The phase change which is accompanied by the release of heat is: B) \(H_20_{(l)} -->H_20_{(s)}\).

Matter can be defined as anything that has mass and can occupy space.

Since matter are made up of atoms, they have a property of existing in three (3) distinct phase (state) and these include;

A phase change can be defined as a change from a particular phase (state) without a corresponding change in the chemical composition of a substance (matter).

Generally, matter changes phase (state) when heat (thermal) energy is either released or absorbed, with a corresponding change in its absolute temperature.

Basically, the two phase changes where heat (thermal) energy is released are:

I. Condensation: gas to liquid.

II. Freezing: liquid to solid.

In conclusion, the freezing of liquid water to solid is a phase change that is typically accompanied by the release of heat (thermal) energy.

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"Hypotonic solution," refers to a solution with the highest water concentration due to its lower solute concentration compared to the other options, leading to water influx into cells.

A hypotonic solution would be most likely to have the highest water concentration. In a hypotonic solution, the solute concentration is lower than that inside the cell or compared to another solution. As a result, water tends to move into the cell or the solution to equalize the concentration.

When a cell is placed in a hypotonic solution, water molecules will move into the cell through the process of osmosis. This influx of water increases the water concentration inside the cell, leading to cell swelling or even bursting in extreme cases.

Compared to hypertonic and isotonic solutions, a hypotonic solution has a lower solute concentration, allowing for a higher concentration of water molecules. This results in a higher water concentration in the solution. It's important to note that the concept of tonicity is related to the relative solute concentrations between two solutions and their effect on cell osmosis. In this case, a hypotonic solution is characterized by a higher water concentration compared to the other options.

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kb = 1.0 x 10^-14 / 6.8 x 10^-4kb = 1.47 x 10^-11MThe value of kb for the fluoride ion, F- is 1.47 x 10^-11M

HF is a weak acid that partially dissociates into H+ and F-.

The value of the acid dissociation constant, ka for HF is 6.8x10^-4. Most of the time, when we talk about acid-base reactions, we focus on the acid and its conjugate base. HF is acid, while F- is its conjugate base, which accepts a proton from HF. Since F- accepts a proton from HF, it is called a base. To find the value of kb for the conjugate base F-, we can use the relationship between ka and kb for a conjugate acid-base pair. Since HF and F- form a conjugate acid-base pair, we can use the equation: ka x kb = Kw, where Kw is the ion product constant of water, which is 1.0 x 10^-14 at 25°C. Rearranging this equation gives kb = Kw / ka.

Therefore, kb = 1.0 x 10^-14 / 6.8 x 10^-4kb = 1.47 x 10^-11MThe value of kb for the fluoride ion, F- is 1.47 x 10^-11M.

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Answer:

A

Explanation:

Determine the mass number for each of the isotopes, which is obtained by adding the number of protons and the number of neutrons. Hence, isotope A has a mass number of 1, isotope B has a mass number of 2, and isotope C has a mass number of 3. To determine the average atomic mass, we multiply the atomic mass of each isotope by its abundance. Hence, we obtain (0.99985 × 1 amu) + (0.00015 × 2 amu) + (0.00 × 3 amu) = 1.00 amu

Answer:

4

Explanation:

because is has the greatest volt

Answer:

a for apple b for ball

Explanation:

ooakakka

Answer:

can you please type english?Explanation:

Answer:

1. B

2.C

3.D

4.Sorry don't this one :(

5.A

Explanation:

please give me at least 20 points ❤

Answer:

Neon is a noble gas

Explanation:

It is important to note that the excitation energy of even the lowest excited states of noble gases is greater than the ionization energy of many atoms of other elements.

This is because, the electrons in a noble gas are contained in a filled shell with greater stability than the the atoms of other elements.

Hence, it becomes difficult to excite the neon atom to a higher energy level.

Recall that photons are emitted when atoms of elements return to ground state after being excited to higher energy level.

Since it is difficult to excite neon, it is also difficult to cause photons to be emitted from neon.

A semiconducting material is composed of 105 g of Ga, 80 g of Al, and 92. 0 g of As Ga will have the largest number of atoms in this material.

The electrical conductivity of a semiconductor material is intermediate between those of a conductor, including metallic copper, as well as an insulator, like glass. As the temperature increases, its resistivity decreases; metals respond in a reverse way.

As it can be seen that Ga has higher number of amount that's why it has also higher number of amount in it.

105 g = Ga

80 g = Al

92. 0 g = As.

Ga has higher number of amount and Al has less number oof amount.

Therefore, a semiconducting material is composed of 105 g of Ga, 80 g of Al, and 92. 0 g of As Ga will have the largest number of atoms in this material.

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The temperature needed to maintain the pressure is 294.7K

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                                       PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Pressure = 1.21 atm

Volume = 10 L

number of moles = 0.5

PV = nRT

1.21 × 10 = 0.5 × 0.0821 × T

T = 294.7 K

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Boyle's Law relates the measurable properties of Pressure and Volume. (B)

Boyle's Law states that the pressure of a given quantity of gas is inversely proportional to its volume when the temperature and mass remain constant.

In other words, when the temperature and the amount of gas do not change, an increase in pressure causes a decrease in volume and vice versa. Mathematically, this can be represented as P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.

To apply Boyle's Law, ensure that the temperature and mass of the gas remain constant throughout the process, and then use the formula to solve for the unknown variable (either pressure or volume) given the known values.(B)

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Answer:

i think this is [d. phenol]

The correct answer:

Phenol

\( \large{ \boxed{ \bf{ \color{green}{Option \: D}}}}\)

Phenol is a compound, While other are elments found under the 17th group, and popularly known as Halogens.

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