which gas sample has the greater mass

Answer:

Here's what I get  

Explanation:

(i) Voltaic cell

A voltaic cell is a device that uses a chemical reaction to produce electrical energy.

(ii) Overall Cell Potential

The standard reduction potentials for the half-reactions are

                               ℰ°/V

Cu²⁺ + 2e⁻ ⇌ Cu    0.34

Zn²⁺ + 2e⁻ ⇌ Zn   -0.76

The half-reaction with the more positive potential is the reduction half-reaction. It is the reaction that occurs at the cathode.

The half-reaction with the more negative potential is the oxidation half-reaction. It is the  reaction that occurs at the anode.

We reverse that half-reaction and subtract the voltages to get the cell reaction.

                                                          ℰ°/V

Cathode:  Cu²⁺ + 2e⁻ ⇌ Cu              0.34

Anode:     Zn ⇌ Zn²⁺ + 2e⁻              -0.76

Cell:          Zn +  Cu²⁺ ⇌ Zn²⁺ + Cu    1.10

\(\mathcal{E}_{\text{cell}}^{\circ} = \mathcal{E}_{\text{cat}}^{\circ} - \mathcal{E}_{\text{an}}^{\circ} = \text{0.34 V} - \text{(-0.76 V)} = \text{0.34 V} + \text{0.76 V} = \textbf{1.10 V}\)

(iii) Diagram

The specific labels will depend on your textbook.

They are often as follows.

a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

The salt bridge enables ions to flow in the internal circuit and to maintain electrical neutrality in the two compartments.

It often consists of a saturated solution of KCl.

As Zn²⁺ ions form in the anode compartment, Cl⁻ ions move in to provide partners for them.

As Cu²⁺ ions are removed from the cathode compartment, K⁺ ions move in to replace them.

Answer:a. Electron flow

b. Voltmeter or lightbulb

c. Electron flow

d. Cathode or Cu

e. Cu²⁺(aq) and NO₃⁻(aq)

f. Salt bridge

g. Zn²⁺(aq) and NO₃⁻(aq)

h. Anode or Zn

Explanation:

Answer:

3.46

⋅

10

−

19

J

The energy of a photon is proportional to its frequency, as stated by the Planck - Einstein's equation

E

=

h

⋅

ν

, where

E

- the energy of the photon

h

- Planck's constant, equal to

6.626

⋅

10

−

34

J s

ν

- the frequency of the photon

Now, notice that you are given the wavelength of the photon,

λ

. As you know, frequency and wavelength have an inverse relationship described by the equation

λ

⋅

ν

=

c

, where

c

- the speed of light in vacuum, approximately equal to

3

⋅

10

8

m s

−

1

This means that the relationship between energy and wavelength looks like this

λ

⋅

ν

=

c

⇒

ν

=

c

λ

E

=

h

⋅

c

λ

Another important thing to notice here is that the wavelength of the photon is given in nanometers,

nm

. You need to convert this to meters, the unit used for the value of the speed of light.

E

=

6.626

⋅

10

−

34

J

s

⋅

3

⋅

10

8

m

s

−

575

⋅

10

−

9

m

=

3.46

⋅

10

−

19

J

Explanation:

Brainliest please?

Bohrs model of the hydrogen atom explains why excited hydrogen gas gives off certain colors of light.

Although electrons actually circulate around the nucleus, according to Bohr, their energy does not change. He clarified that because electrons are constrained to specific fixed orbits, their energy does not change. Each of these orbits has a definite energy value and is located at a given distance from the nucleus. Starting from the center, the letters K, L, M, and N, or the digits 1, 2, 3, and 4, are used to denote these energy levels.

Thus, Neils Bohr's final model resembled Rutherford's theory of the atom, which holds that an atom is made up of a positively charged center around which the electrons rotate. The sole distinction is that in Bohr's concept, electrons move in set orbits with fixed energies around the nucleus.

To know more about  Bohrs model visit : https://brainly.com/question/14618415

#SPJ4

Answer:

Explanation:

The solubility of the gas when the pressure is increased to 2.5 atm is 1.9 g/L. Therefore the correct answer is option D: 1.9 g/L.

To determine the solubility of the gas when the pressure is increased to 2.5 atm, we apply Henry's Law, which states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid.

Mathematically, Henry's Law can be expressed as:

S₁/P₁ = S₂/P₂

Where:

S₁ = Initial solubility of the gas

P₁ = Initial pressure

S₂ = Final solubility of the gas (to be determined)

P₂ = Final pressure

Given:

S₁ = 7.6 x 10⁻¹ g/L

P₁ = 1.0 atm

P₂ = 2.5 atm

Let's plug these values into the equation and solve for S₂:

S₁/P₁ = S₂/P₂

(7.6 x 10⁻¹ g/L) / (1.0 atm) = S₂ / (2.5 atm)

(7.6 x 10^(-1) g/L) × (2.5 atm) = S₂ × (1.0 atm)

1.9 g/L = S₂

S₂ = 1.9 g/L

Therefore, the solubility of the gas when the pressure is increased to 2.5 atm is 1.9 g/L.

Learn more about solubility here:

https://brainly.com/question/24057916

#SPJ1

Phosphoric acid cannot be determined by titration with NaOH using either phenolphthalein or methyl orange indicator because of the presence of multiple dissociation stages in the acid. As a result, the equivalence point cannot be determined accurately.

This is due to the fact that the acid has three dissociation stages. Phosphoric acid (H3PO4) is an example of a polyprotic acid, which means that it has more than one hydrogen ion to donate.

The acid undergoes successive ionization to form H2PO4-, HPO42-, and PO43- ions. The stepwise dissociation reactions are as follows: H3PO4(aq) + H2O(l) → H2PO4-(aq) + H3O+(aq)Ka1 = 7.5 × 10-3H2PO4-(aq) + H2O(l) → HPO42-(aq) + H3O+(aq)Ka2 = 6.2 × 10-8HPO42-(aq) + H2O(l) → PO43-(aq) + H3O+(aq)Ka3 = 4.2 × 10-13

As a result, the pH of the solution after each addition of NaOH will change in a series of steps rather than a single sharp change. As a result, it is impossible to determine the exact equivalence point using either phenolphthalein or methyl orange indicator.

Therefore, it is not possible to determine the amount of phosphoric acid in a solution using the titration method with these indicators.

To know more about titration, refer here:

https://brainly.com/question/30261738#

#SPJ11

Cyclops are heterotrophic

To prepare 50 ml of a solution, containing 5 grams/liter of salt, the amount in grams of salt we need is 0.25 grams.

To prepare 50 ml of a solution containing 5 grams/liter of salt, we need to use the following formula:

Mass of salt = volume of solution x concentration of solution

Mass of salt = 50 ml x 5 g/L

Convert the volume to liters:

50 ml ÷ 1000 ml/L = 0.05 L

Substitute the values into the formula:

Mass of salt = 0.05 L x 5 g/L

Mass of salt = 0.25 g

Therefore, we need 0.25 grams of salt to prepare 50 ml of a solution containing 5 grams/liter of salt.

Learn more about concentration here; https://brainly.com/question/26255204

#SPJ11

Hess's law gave the net change in enthalpy.  According to the law, the enthalpy of the reaction is the addition of the enthalpies of the intermediate reaction. Thus, option B is accurate.

Hess's law or the law of constant heat summation is the measure of the heat or the enthalpy of the chemical reaction. It was given by the chemist, Germain Hess.

The law states that the enthalpy of the chemical reaction is the sum of the enthalpies involved in the reactants and the products of the reaction. It is independent of the steps involved in the reaction.

Therefore, option B. enthalpy of reaction is the summation of the enthalpy of the intermediates.

Learn more about Hess's law here:

https://brainly.com/question/19480954

#SPJ2

The person lives 76 1/2 years. if the heartbeat is  77 beats per minute.

A heartbeat is a two-part pumping movement that takes approximately a 2nd. As blood collects within the top chambers of the proper and left atria, the coronary heart's herbal pacemaker the SA node sends out an electrical signal that reasons the atria to settle.

77 beats = 1 minute

Let X = 3.1*10⁹ beats

X = (3.1*10⁹ beats * 1 minute) / 77 beats = 40259740.26  minutes.

Now, we express this amount of time in years.

1 year=365 day

365 days=365 day*(24 hour/1day)*(24 hour /1day)*(60 minutes /1hour)=

=525600 minutes.

525600 minutes = 1 year

40259740.26   minutes = 40259740.26 /525600

                                        = 76.59 ≈ 76 1/2 years.

Learn more about heartbeat here:-https://brainly.com/question/26292783

#SPJ9

Approximately 2.81 x\(10^{19\) kg of water lost an electron to the lightning bolt.

The charge of one electron is 1.602 x \(10^{(-19)\) C. Therefore, the number of electrons transferred in the lightning bolt can be calculated as:

25 C / (1.602 x \(10^{(-19)\) C/electron) = 1.56 x \(10^{20\)electrons

If each water molecule donates one electron, then the number of water molecules that lost an electron to the lightning bolt can be calculated by dividing the total number of electrons transferred by the number of electrons per water molecule:

1.56 x \(10^{20\)electrons / 1 electron per water molecule = 1.56 x \(10^{20\)water molecules

Finally, we can calculate the mass of water that lost an electron by multiplying the number of water molecules by the mass of one water molecule:

1.56 x \(10^{20\) water molecules x 18 g/mole = 2.81 x \(10^{22\)g = 2.81 x \(10^{22\) kg.

Learn more about electron here:

https://brainly.com/question/12001116

#SPJ11

Answer:

61 neutrons.

Answer:

61 neutrons

Explanation:

the number of neutrons in silver is 61

Two isotopes of the same element only have these differences: atomic mass

Isotopes are forms of an element that have the same number of protons and electrons but differing numbers of neutrons. The various isotopes of an element have varying weights depending on the amount of neutrons present in each isotope.

Chemically speaking, an element's isotopes are nearly or completely identical. The chemical behaviours of several isotopes are quite similar. But each isotope has a unique set of physical characteristics, including as mass, melting or boiling temperature, density, and freezing point. Any isotope's physical characteristics are mostly influenced by its mass.

To learn more about isotopes https://brainly.com/question/14220416

#SPJ4

1. mercury - metal, liquid at temperature

2. oxygen - does not have a definite volume

3.Bromine - non-metal, liquid at room temperature

4.mercuric oxide - compound

5. silver -malleable and ductile

6. chemical change - decomposition of compound

The only common metal that is liquid at room temperature is mercury, a chemical element. It is a thick, silvery-white liquid metal that is frequently referred to as quicksilver. Mercury is a metal in transition.

Since mercury is a chemical element, it cannot be made or destroyed. Since the creation of the earth, the same quantity has been present on the planet. However, both natural and human activity can cycle mercury in the environment. Additionally, there have been numerous new uses for mercury metal in electrochemistry and electrical equipment. Mercury metal has a significant vapour pressure at normal temperature and is a volatile liquid.

At 20°C, mercury has a density of 13.6 g.cm-3.

Mercury is a metallic element that is liquid and has a wide range of uses. Additionally, it has dangerous qualities.

Learn more about mercury here:

brainly.com/question/585198

#SPJ13

Answer:

4 covalent bonds

Explanation:

THE conjugate acid, within the acid–base theory, is a chemical compound formed by the reception of a proton by a base—in other words, it is a base with a hydrogen ion added to it, as in the reverse reaction it loses a hydrogen ION.

Answer:

Adding an acid increases the concentration of H3O+ ions in the solution. Adding a base decreases the concentration of H3O+ ions in the solution. An acid and a base are like chemical opposites. If a base is added to an acidic solution, the solution becomes less acidic and moves toward the middle of the pH scale.

Answer: 13.1

Explanation: just round the .06 to 1 creating three sig figs.

Bio1613 Principles of Nutrition is an introductory course that explores the scientific basis for nutrition and its implications for health, illness, and well-being. The course focuses on the biochemical, physiological, and metabolic aspects of nutrition, including vitamins, minerals, fat, carbohydrate, and protein metabolism.

FCS1253 Principles of Nutrition is more focused on the practical application of nutrition. This course looks at the components of a well-balanced diet, as well as nutrition education and guidelines tailored to specific populations. The course also covers nutrition misconceptions, dietary recommendations, and the role of food in health promotion. Additionally, students will gain an understanding of current dietary trends, food labeling, and the potential consequences of improper nutrition.

To learn more about Nutrients:

https://brainly.com/question/30568687

#SPJ4

Answer:

The correct answer is Calcium Carbonate.

Explanation:

Please ask questions correctly

1. Mechanical Energy – This is the energy possessed by a body due to its motion or position. It includes kinetic energy (energy of motion) and potential energy (stored energy of position).

Energy is the capacity to do work. It is present in many forms such as kinetic, potential, thermal, electrical, and chemical energy. Kinetic energy is the energy of motion, while potential energy is the energy due to position or shape. Thermal energy is the energy of heat, while electrical energy is the energy of charged particles, such as electrons. Chemical energy is the energy stored in the bonds between atoms. All of these forms of energy are capable of doing work, and can be converted into one another. On the whole, energy is the capacity to cause change in the physical world.

2. Thermal Energy – This is the energy of a system due to its temperature. It is also known as heat energy.
3. Electrical Energy – This is the energy created by the flow of electrons through a conductor.
4. Chemical Energy – This is the energy stored in the bonds between atoms in a chemical compound.
5. Nuclear Energy – This is the energy released from the nucleus of an atom when it splits or fuses.

To learn more about Energy
https://brainly.com/question/29339318
#SPJ1

Answer:

Chlorine is more likely to steal a valence electron from sodium.

Explanation:

Sodium is number 11 on the periodic table with one valence electron. Belonging to the first group, it's one of the alkali metal, which are known to be highly reactive. Chlorine is number 17 with seven valence electrons, and it's in the second-to-last group of halogens--also very reactive.

Considering that elements with one valence electron are just about 100% likely to give up electrons to reach a stable state, sodium would be the element that is more likely to lose its valence electron to chlorine. In other words, chlorine would be the electron thief.

Answer:

the volume of the same gas at pressure of 1.00atm =737.3ml

Helium: The new volume of the balloon is 0.6182 L.

Colorless, odourless , tasteless, inert, non-toxic helium is a monatomic gas. It is the lightest element in the periodic table and the second most abundant element in the universe.

The new volume of the balloon can be calculated using the ideal gas law, which states that PV = nRT, where P is the n represents the number cubic moles of gas, V represents the volume, R is the real gases constant, and the temperature is T.

First, we need to calculate the number of moles of helium in the balloon after the additional 0.670 grams have been added:
n = 0.670 g He/4.003 g/mol = 0.167 mol

The total number of moles in the balloon is now 0.267 mol. We can use the ideal gas law to calculate the new volume:

V = (0.267 mol)(0.0821 L·atm/K·mol)(273 K)/1 atm = 0.6182 L

To learn more about Helium
https://brainly.com/question/24402295
#SPJ4

A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

For such more question on oxidizes

https://brainly.com/question/14041413

#SPJ8

The correct answer is: 1.8 moles Fe and 2.7 moles CO2.

In the balanced chemical equation, Fe2O3 + CO → Fe + CO2, the stoichiometric coefficients indicate the mole ratio between the reactants and products. According to the coefficients, 1 mole of Fe2O3 reacts with 3 moles of CO to produce 2 moles of Fe and 3 moles of CO2.

Given that 1.8 moles of Fe2O3 and 2.7 moles of CO are provided, we can determine the number of moles of each product formed. From the mole ratio, 1 mole of Fe2O3 requires 3 moles of CO, so 1.8 moles of Fe2O3 will react with (1.8 moles × 3 moles CO / 1 mole Fe2O3) = 5.4 moles of CO. Therefore, the remaining 2.7 moles of CO will not react fully and will be in excess.

Using the mole ratio, 1 mole of Fe2O3 produces 2 moles of Fe. Since 1.8 moles of Fe2O3 are consumed, the number of moles of Fe produced is (1.8 moles × 2 moles Fe / 1 mole Fe2O3) = 3.6 moles Fe.

Similarly, 1 mole of Fe2O3 produces 3 moles of CO2. Thus, the number of moles of CO2 formed is (1.8 moles × 3 moles CO2 / 1 mole Fe2O3) = 5.4 moles CO2.

Hence, the correct answer is 1.8 moles Fe and 2.7 moles CO2.

learn more about CO2 here
https://brainly.com/question/11382755

#SPJ11