Describe an experiment which shows that chlorine is more reactive than iodine. Include an equation in your answer.​

Answer: it is a good conductor of electriciy tht is what wires are made of and it is a good conductor of heat so it will be able to handle the heat from the electricity

Explanation:

Answer:

Iron is a shiny, bright white metal that is soft, malleable, ductile and strong. Its surface is usually discolored by corrosion, since it combines readily with the oxygen of the air in the presence of moisture. In absolutely dry air, it does not rust

Explanation:

I hope it helps

I agree with Layla. A mechanical mixture can have both solids and liquids in it. An example of this is a suspension. A suspension is a heterogeneous mixture in which the solid particles are not dissolved in the liquid, but rather suspended throughout it. The solid particles will eventually settle out of the suspension over time, but for a short period of time, they will remain suspended throughout the liquid.

Here are some other examples of mechanical mixtures that have both solids and liquids in them:

Kris is incorrect in saying that a mechanical mixture has to be all solids or all liquids. A mechanical mixture can be any combination of solids, liquids, and gases.

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Answer:false

Explanation:

i took the test

Explanation:

10ml = Volume of water

14ml = Volume of water + Volume of marble

Therefore the volume of the marble is 4ml.

The volume of water is 10 ml and the total volume of the cylinder is 14 mi, then the volume of the marble is 4ml.

Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.

The basic formula for volume is length, breadth, and height, as opposed to length, width, and height for the area of a rectangular shape. The calculation is unaffected by how you refer to the various dimensions; for instance, you can use "depth" instead of "height."

Volume is a unit used to describe how much space a substance takes up. A physical material with mass and space-occupying properties is referred to as matter. The usual measurement of volume in physical sciences like chemistry is in cubic meters (m3).

The volume of water is 10 ml

Volume of water + Volume of marble

=14 ml

Thus, the volume of the marble is 4ml.

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Answer:

1) AgNO3 (aq) + KCl (aq) -> AgCl (s) + KNO3 (aq)

Ag+ (aq) + NO3- (aq) + K+ (aq) + Cl- (aq) -> AgCl (s) + K+

(aq) + Cl- (aq)

Ag+ (aq) + Cl- (aq) -> AgCl (s)

2) 2NaCl (aq) + K2CO3 (aq) -> Na2CO3 (aq) + 2KCl (aq)

3) Fe(NO3)3 (aq) + 3NaOH (aq) -> Fe(OH)3 (s) + 3NaNO3

(aq)

Fe³+ (aq) + 3NO3- (aq) + 3Na+ (aq) + 3OH- (aq) ->

Fe(OH)3 (s) + 3Na+ (aq) + 3NO3- (aq)

Fe³+ (aq) + 3OH- (aq) -> Fe(OH)3 (s)

4) BaBr2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaBr (aq)

Ba²+ (aq) + 2Br- (aq) + 2Na+ (aq) + SO4²- (aq) ->

BaSO4 (s) + 2Na+ (aq) + 2Br- (aq)

Ba²+ (aq) + SO4²- (aq) -> BaSO4 (s)

Explanation:

Sorry, I couldn't make the charges superscript. Don't know how.

On #2, no reaction occurs; everything stays aqueous.

Answer:

The pressure at 210 K will be 2.53 atm.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

This law mathematically indicates that the quotient between pressure and temperature is constant:

\(\frac{P}{T} =k\)

You want to study two different states, an initial state and a final state. You have a gas that is at a pressure P1 and at a temperature T1 at the beginning of the experiment. By varying the temperature to a new value T2, then the pressure will change to P2, and the following will be fulfilled:

\(\frac{P1}{T1} =\frac{P2}{T2}\)

In this case:

Replacing:

\(\frac{6.5 atm}{540 K} =\frac{P2}{210 K}\)

Solving:

\(P2=210 K*\frac{6.5 atm}{540 K}\)

P2=2.53 atm

The pressure at 210 K will be 2.53 atm.

Answer:

laboratory/safety shower.

Otherwise, immediately wash with water and tell your teacher or instructor.

The enthalpy change when 8.50 L of ozone at a pressure of 1.00 atm and 25°C reacts with 12.00 L of nitric oxide at the same initial pressure and temperature is -277.5 kJ/mol.

The enthalpy change when 8.50 L of ozone at a pressure of 1.00 atm and 25°C reacts with 12.00 L of nitric oxide at the same initial pressure and temperature can be calculated by the given equation. The balanced equation for the reaction is:2O3(g) + 2NO(g) → 2NO2(g) + 3O2(g)The enthalpy change for the given reaction can be determined using Hess’s law. Hess’s law states that the enthalpy change of a reaction is independent of the route taken, provided that the initial and final conditions are the same.

Since the given reaction can be expressed as a sum of a series of known reactions, Hess’s law can be used to calculate the enthalpy change.Using the given data, the enthalpy change for the reaction can be calculated as follows:δH° = 2 × [ΔH°f(NO2(g))] + 3 × [ΔH°f(O2(g))] - 2 × [ΔH°f(O3(g))] - 2 × [ΔH°f(NO(g))]δH° = 2 × [33.85 kJ/mol] + 3 × [0 kJ/mol] - 2 × [142.2 kJ/mol] - 2 × [90.4 kJ/mol]δH° = - 277.5 kJ/mol

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The net redox reactions and labels involving the two types of electron carriers in acetyl CoA formation and the citric acid cycle are:

Acetyl CoA Formation: (b) NADH and (a) CO2

Citric Acid Cycle: (b) NADH, (d) FADH2, and (a) CO2

The metabolic process of acetyl CoA formation and the citric acid cycle is a key pathway for energy production in cells.

Pyruvate, the end product of glycolysis, is completely oxidized during this process, and the electrons produced from this oxidation are passed on to two types of electron acceptors: NAD+ and FAD. NAD+ is reduced to NADH, while FAD is reduced to FADH2.

These electron carriers play a critical role in the production of ATP, which is the primary energy currency of cells. The NADH and FADH2 produced during these reactions are then used in the electron transport chain to generate a proton gradient, which drives the synthesis of ATP.

Acetyl CoA Formation:

Pyruvate + CoA + NAD+ -> Acetyl-CoA + CO2 + NADH

Citric Acid Cycle:

Acetyl-CoA + 3NAD+ + FAD + GDP + Pi -> 2CO2 + 3NADH + FADH2 + GTP + CoA

So the labels would be:

Acetyl CoA Formation: (b) NADH and (a) CO2

Citric Acid Cycle: (b) NADH, (d) FADH2, and (a) CO2

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Answer:

I have written the answer below:

Explanation:

a. row 1- Mass of O2: 48g

b. row 2- Mass of O2: 192g

c. row 2- mass of Al2O3: 240g

d. row 3- Mass of Al: 270g

e. row 3- Mass of Al2O3: 510g

f. row 4- Mass of Al: 162g

g. row 4- Mass of O2: 144g

One piece of information that 9" gives about an atom of fluorine is that it has 9 protons in its nucleus, determining its atomic number.

An atom of fluorine is represented by the symbol F and has an atomic number of 9, which indicates the number of protons in its nucleus. This is the most crucial information that "9" provides. In a neutral atom, there are also 9 electrons surrounding the nucleus in specific energy levels or electron shells.

These electrons determine the chemical properties and reactivity of the element. Fluorine has 2 electrons in its first shell and 7 electrons in its second shell. The outermost shell, with 7 electrons, has one unpaired electron, making fluorine highly reactive and enabling it to form one covalent bond with other elements.

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To save an unhealthy lawn, undertake a scientific project involving soil analysis, adjusting soil conditions, implementing proper watering practices, addressing pest and weed control, ensuring proper mowing techniques, monitoring and maintaining the lawn, and seeking professional advice if needed.

Identify the problem: Determine the specific issues affecting the lawn, such as discoloration, patchy areas, or pests. Observe the lawn closely to identify any underlying causes for its unhealthy condition.

Conduct soil analysis: Collect soil samples from different areas of the lawn and perform a soil analysis. This analysis will provide information about the soil's pH level, nutrient composition, organic matter content, and any imbalances that may be contributing to the lawn's poor health.

Adjust soil conditions: Based on the soil analysis results, take necessary steps to correct any imbalances or deficiencies. This may involve adding fertilizers to provide essential nutrients, adjusting the pH level with soil amendments, or enhancing soil structure by adding organic matter.

Implement proper watering practices: Evaluate the lawn's watering regimen. Ensure the lawn receives adequate water but avoid overwatering, as it can lead to fungal growth and shallow root development. Use a targeted watering approach, focusing on the lawn's needs and avoiding water wastage.

Address pest and weed control: Identify any pests or weeds affecting the lawn's health. Implement appropriate pest management strategies, such as using organic or chemical-based pest control methods. Remove weeds manually or apply herbicides selectively to prevent competition with the grass.

Ensure proper mowing techniques: Evaluate the lawn's mowing practices. Adjust the mowing height to the appropriate level for the grass species and avoid cutting too short, as it can stress the grass and make it more susceptible to disease and pests.

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Answer:

Mass = 20 g

Explanation:

Given data:

Number of moles of He = 5 mol

Mass of He = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass = 4 g/mol

by putting values,

5 mol = Mass / 4 g/mol

Mass = 5 mol × 4 g/mol

Mass = 20 g

Answer:

Drainage basin, also called catchment area, or (in North America) watershed, area from which all precipitation flows to a single stream or set of streams. ... The boundary between drainage basins is a drainage divide: all the precipitation on opposite sides of a drainage divide will flow into different drainage basins.

Explanation:

just looked it up

Answer:1. One is warm, the other cold

2. the cold one is smaller

Explanation: V/T is constant

if temperature decreases, volume decreases and vice versa

According to the concept of thermal energy, the balloon kept in refrigerator  has less volume while that is heated has more volume.

Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.

Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.

These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.

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Answer:

Chemical because water + metal = rust.

Explanation:

A new substance was formed.

Answer:

The outermost shell of helium for example is filled with only two electrons. Hydrogen and lithium become stable by acquiring the electronic configuration of the nearest inert gas, which is helium. This is the duplet (or duet) rule.

Explanation:

The empirical formula of the compound is \(C_{12} H_{15} O\). To calculate the percentage composition of the compound, we need to determine the masses of its constituent elements, namely carbon, hydrogen, and oxygen.

Mass of carbon = mass of CO2 produced = 31.154 mg

1 mol of CO2 contains 1 mol of C

1 mol of C weighs 12.01 g

Therefore, mass of C in the sample = (31.154 mg)/(44.01 g/mol) × 12.01 g/mol = 8.520 mg

Mass of hydrogen = mass of H2O produced = 7.977 mg

1 mol of H2O contains 2 mol of H

1 mol of H weighs 1.008 g

Therefore, mass of H in the sample = (7.977 mg)/(18.02 g/mol) × 2.016 g/mol = 0.893 mg

Mass of oxygen = mass of sample - mass of C - mass of H = 9.394 mg - 8.520 mg - 0.893 mg = 0.981 mg

The percentage composition of the compound is:

Carbon: (8.520 mg / 9.394 mg) x 100% = 90.74%

Hydrogen: (0.893 mg / 9.394 mg) x 100% = 9.51%

Oxygen: (0.981 mg / 9.394 mg) x 100% = 10.44%

(b) To determine the empirical formula of the compound, we need to convert the mass percentages of carbon, hydrogen, and oxygen into their respective mole ratios.

Assuming a 100 g sample of the compound, we have:

Mass of carbon = 90.74 g

Mass of hydrogen = 9.51 g

Mass of oxygen = 10.44 g

The number of moles of each element can be calculated as follows:

Moles of carbon = 90.74 g / 12.01 g/mol = 7.55 mol

Moles of hydrogen = 9.51 g / 1.008 g/mol = 9.44 mol

Moles of oxygen = 10.44 g / 16.00 g/mol = 0.65 mol

To obtain the simplest whole-number mole ratio, we divide the number of moles of each element by the smallest number of moles:

Moles of carbon = 7.55 mol / 0.65 mol = 11.62 ≈ 12

Moles of hydrogen = 9.44 mol / 0.65 mol = 14.52 ≈ 15

Moles of oxygen = 0.65 mol / 0.65 mol = 1

Therefore, The empirical formula of the compound is \(C_{12} H_{15} O\).

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Answer:

Rain,Hail,Snow,sleet. Hope this helped you out!

An animal cell, a plant cell, and a paramecium cell have different responses in hypotonic, hypertonic, and isotonic solutions.

In a hypotonic solution, an animal cell swells and may burst due to an influx of water, while a plant cell becomes turgid and firm due to the presence of a cell wall. A paramecium cell also swells but has a contractile vacuole to pump out excess water. In a hypertonic solution, an animal cell shrivels up and may die due to water loss, while a plant cell undergoes plasmolysis, where the cytoplasm shrinks away from the cell wall. A paramecium cell also undergoes plasmolysis and may die. In an isotonic solution, an animal cell and a paramecium cell maintain their shape and size, while a plant cell remains turgid but does not burst due to the balance of water entering and leaving the cell. Overall, the presence or absence of a cell wall and other structures such as contractile vacuoles can greatly affect the response of different types of cells in different types of solutions.

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The relationship between them is that they are all times in the geologic scale but have different spans.

The Eons is regarded as the largest unit of time in this scale. The Eon is

divided into smaller part known as Era. The Era is a unit of time which is

shorter than Eon.

Eras is further divided into periods. The period is a unit of time which is

smaller than the era.  The Periods are then subdivided into even smaller

time spans known as epochs. This simply means in the periods of geologic

time scale, the eons is the largest time scale and the epoch is the lowest

time scale. The order is shown below

Eons > Era > Period  > Epoch

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 18.015 g

volume = 15 cm³

We have

\(density = \frac{18.015}{15} \\ = 1.000833333...\)

We have the final answer as

Hope this helps you

Answer:

A molecule's shape strongly affects its physical properties and the way it interacts with other molecules, and plays an important role in the way that biological molecules (proteins, enzymes, DNA, etc.) interact with each other.

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, by rotation of molecule or bond , we can change the shape of molecule.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water. To change the shape of your molecular models without breaking any of the covalent bonds is by rotating the molecule or a bond.

Therefore, by rotation of molecule or bond , we can change the shape of molecule.

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Answer:

Energy is added to water in the liquid state. As a result, water's molecules speed up, the empty space between them increases, and water changes from a liquid to a gas. This process is endothermic.

Explanation:

I got it right so I hope you do to.

The new pressure of the gas would be 599.03 kilopascals

Boyles postulated that the pressure of any gas would be inversely proportional to its volume if the temperature of the gas remains unchanged.  

Mathematically: P1V1 = P2V2

In this case, P1 = 105 kilopascals, V1 = 2.031 liters, V2 = 0.356 liters.

P2 = P1V1/V2 = 105 x 2.031/0.356 = 599.03 kilopascals

Thus, the new pressure will be 599.03 kilopascals.

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Answer: 599

Explanation:

cuz i got the answer right on the test

Among the given molecules, the one with a net dipole moment (i.e., is polar) is:
E. SF2

A dipole moment occurs when there is an uneven distribution of electron density, resulting in a molecule having a positive and a negative end (or pole). A molecule is considered polar if it has a net dipole moment.

A. KrF2 - This molecule is linear, with the two fluorine atoms evenly distributed around the central krypton atom, resulting in no net dipole moment.
B. CCl4 - The molecule is tetrahedral, with the chlorine atoms symmetrically arranged around the central carbon atom, which cancels out any individual dipole moments.
C. CO2 - This linear molecule has two oxygen atoms symmetrically arranged around the central carbon atom, resulting in no net dipole moment.
D. BeCl2 - This linear molecule has two chlorine atoms symmetrically arranged around the central beryllium atom, resulting in no net dipole moment.
E. SF2 - This molecule has a bent geometry with two fluorine atoms and a lone pair of electrons on the sulfur atom, leading to an uneven distribution of electron density and a net dipole moment.

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1.52 tanks of gas will be used to drive 1600 km.

A certain fuel-efficient hybrid car gets gasoline mileage of 55.0 mpg (miles per gallon).

A gallon is a unit of volume in both the US customary and imperial systems of measurement. The US gallon is defined as 231 cubic inches (3.785 liters).

1 mpg = 0.425143707 km/l; to convert miles per gallon to kilometers per liter .

mileage = 23.38 km/l

volume = 1600 km ÷ 23.38 km/l

volume = 68.43 liters; the amount of gasoline needed the trip

tanks = 68.43 l ÷ 45 l

tanks = 1.52

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Answer:125ml - volume of phosphoic acid

Explanation:

The equation of the reaction is

H3PO4 + 3 NaOH ---> Na3PO4 + 3H2O

Such that I mole of H3PO4 reacts with 3 moles of  NaOH to produce the products above.

Given that

M1= Molarity of phosphoric acid = 7.48x10^-2 M

n1= number of moles of phosphoric acid = 1

V1=? ml

M2= Molarity  of Sodium hydroxide =0.244 M

V2= volume of sodium hydroxide= 115ml

n2=number of moles of sodium hydroxide = 3

Using the Dilution equation formulae,

M1V1/n1 = M2V2/n2

7.48X10-2 x V1 /1= 0.244M x 115ml/3

V1=0.244Mx115mlx1/0.0748M X 3

V1= 28.06/0.2244= 125.04ml

V1=125.04ml rounded up to 125ml