Which is the correct equation for the reaction of magnesium with hydrochloric acid to produce hydrogen gas and magnesium chloride?

O Mg + 2HCl -> 2H + MgCl2
O Mg + 2HCl -> H2 + MgCl2
O2Mg + 6HCl -> 3H2 + 2MgCl2
O Mg + HCl -> H+MgCl

The human activity that is most closely associated with depletion of the stratospheric ozone layer is the disposal of refrigerators and air conditioners, which contain chlorofluorocarbons (CFCs) and other ozone-depleting substances. Option (b)

When these substances are released into the atmosphere, they react with ozone molecules in the stratosphere, breaking them down and causing a depletion of the ozone layer. The use of CFCs in aerosols and solvents has also been a significant contributor to the depletion of the ozone layer.

While other human activities such as mining, heating of homes and factories, generation of electricity, and agricultural irrigation can have negative environmental impacts, they are not as closely associated with ozone depletion as the release of ozone-depleting substances from refrigerators, air conditioners, and aerosols.

To learn about human activity:

https://brainly.com/question/12317249

#SPJ4

Full Question: Which of the following human activities is most closely associated with depletion of the stratospheric ozone layer?

A: Mining of coal

B: Disposal of refrigerators and air conditioners

C: Heating of homes and factories

D: Generation of electricity

E: Agricultural irrigation

True. Galvanic corrosion occurs when two dissimilar metals come into contact in the presence of an electrolyte, such as saltwater or acid.

True. Galvanic corrosion occurs when two dissimilar metals come into contact in the presence of an electrolyte, such as saltwater or acid. This creates a flow of electrons between the two metals, causing the more active metal to corrode at an accelerated rate. To prevent galvanic corrosion, it is important to avoid contact between dissimilar metals whenever possible. This can be done by using protective coatings, insulating materials, or by using metals that are similar in their electrochemical properties. In addition, regular maintenance and cleaning can help to prevent the buildup of electrolytes that can lead to galvanic corrosion. Overall, avoiding contact between dissimilar metals is one of the most effective ways to reduce the risk of galvanic corrosion and ensure the longevity of metal structures and equipment.

To know more about Galvanic corrosion visit: https://brainly.com/question/31667168

#SPJ11

When two or more substances are mixed together and appear as a homogeneous mixture, it is called a solution. A solution is composed of two parts: the solvent and the solute. The solvent is the substance in which the solute is dissolved, and it is typically the component of the solution present in the greatest amount. The solute is the substance that is dissolved in the solvent and is typically present in a smaller amount.

For example, when sugar is dissolved in water, water is the solvent, and sugar is the solute. The sugar molecules are dispersed throughout the water molecules, forming a homogeneous solution. Similarly, when salt is dissolved in water, water is the solvent, and salt is the solute.

Solutions can be made of solids, liquids, or gases, and they can be formed by dissolving a solute in a solvent through processes such as stirring, heating, or shaking. The concentration of a solution can be expressed in various units, such as molarity, molality, percent by mass, or percent by volume.

To know more about homogeneous mixture click this link -

brainly.com/question/30587533

#SPJ11

Explanation:

1 kilogram = 1000 grams

1 gram = 0.001 kg ( 1 ÷ 1000)

19.3 × 0.001 = 0.0193

Answer:

literally same im failing almost every class and i just know my dad hates me because of it

Explanation:

where it was formed and. conditions it was formed under

The specific heat of olive oil (2 J/g·°C) is less than that of water (4.18 J/g·°C). This indicates that olive oil requires less heat energy to raise its temperature compared to an equal mass of water.

To describe the specific heat of olive oil compared to water, we can use the given information that it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30°C.

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius (or Kelvin).

In this case, we can calculate the specific heat of olive oil by dividing the amount of heat (420 J) by the mass (7 g) and the temperature change (30°C):

Specific heat of olive oil = (Amount of heat)/(Mass * Temperature change)

                          = 420 J / (7 g * 30°C)

                          ≈ 2 J/g·°C

Comparing this specific heat value to the specific heat of water (which is approximately 4.18 J/g·°C), we can conclude that the specific heat of olive oil (2 J/g·°C) is less than the specific heat of water. This means that olive oil requires less heat energy to raise its temperature compared to an equal mass of water.

To learn more about specific heat capacity click here: brainly.com/question/29766819

#SPJ11

How can you describe the specific heat of olive oil compared to water if it takes approximately 420 J of heat to raise the temperature of 7 g of olive oil by 30°C?

The number of hamburgers sold on Wednesday is 275.

Let's assume the number of hamburgers sold is x.

According to the given information, the number of cheeseburgers sold is 70 more than the number of hamburgers. So, the number of cheeseburgers sold can be expressed as x + 70.

The total number of hamburgers and cheeseburgers sold is given as 620, so we can set up the following equation:

x + (x + 70) = 620

Combining like terms, we get:

2x + 70 = 620

Subtracting 70 from both sides of the equation:

2x = 550

Dividing both sides by 2:

x = 275

Therefore, the number of hamburgers sold on Wednesday is 275.

for more questions on hamburgers

https://brainly.com/question/31214218

#SPJ8

The provision that the seller will release Jacob from any obligation if he loses his job is a contingency provision.

The provision that the seller will release Jacob from any obligation if he loses his job is a contingency provision. Contingency provisions are clauses included in a contract that specify certain conditions or events that must occur in order for the contract to be fulfilled or terminated. In this case, the contingency provision states that if Jacob loses his job, the seller will release him from any obligation under the contract. It is important to note that contingency provisions must be clearly defined and agreed upon by all parties involved in the contract. This type of provision can help to protect both the buyer and the seller in situations where unexpected circumstances arise. Overall, contingency provisions are a valuable tool for managing risk and ensuring that contractual obligations are met.

To know more about contingency provision visit: https://brainly.com/question/31987975

#SPJ11

Answer:

A. 20 B.40 C. Ca D. 10 E. 9 F. F

Explanation:

Answer:

A.) 20

B.) 40

C.) Ca

D.) 10

E.) 9

F.) F

Explanation:

just did it on edge 2020 & got it correct....

Not enough food to eat is A: Abiotic

The solubility of a compound depends on the nature of the solute-solvent interactions. Water is a polar solvent that dissolves polar and ionic compounds. Polar and nonpolar organic solvents dissolve like compounds.

The solubility of a solute in a solvent is dependent on the nature of the solute-solvent interactions. A polar solvent like water is effective in dissolving polar and ionic compounds by forming hydrogen bonds with the solute and separating the ions or polar molecules in the solution. Polar organic solvents, such as ethanol, can also dissolve polar and ionic compounds by forming hydrogen bonds. Nonpolar organic solvents, like hexane or toluene, are effective in dissolving nonpolar and hydrophobic compounds by surrounding the solute molecules and breaking the van der Waals forces holding them together in the solid state. In general, the solute must have a similar polarity as the solvent in order for it to dissolve, and the solvent must have the ability to disrupt the attractive forces holding the solute together in order to dissolve it.

To know more about types of solvents, visit:https://brainly.com/question/9675267

#SPJ4

The combination of one s and two p orbitals will form a group of three sp2 hybrid orbitals. These hybrid orbitals adopt a trigonal planar geometry, and are at an angle of 120° to the remaining unhybridized p orbitals.

The sp2 hybridization occurs when one s orbital and two p orbitals hybridize to form three hybrid orbitals that are oriented in the same plane with an angle of 120° between them. This type of hybridization is commonly observed in molecules such as ethene (C2H4), where each carbon atom undergoes sp2 hybridization to form a double bond. The unhybridized p orbital on each carbon atom forms a pi bond, which contributes to the double bond's strength and stability.

For more such questions on p-orbitals

https://brainly.com/question/11316025

#SPJ11

an electrocyclic reaction is an intramolecular reaction in which a new σ bond is formed between the ends of a conjugated π system. the concerted electron shifts result in a highly stereoselective product. the configuration of the product depends on thermal reaction.

An electrocyclic reaction is indeed an intramolecular reaction in which a new σ bond is formed between the ends of a conjugated π system. This reaction is concerted, meaning that it occurs in a single step without any intermediate species.

The stereochemistry of the product formed depends on whether it is a thermal reaction or a photochemical reaction. In thermal electrocyclic reactions, the product has the same stereochemistry as the starting material. In contrast, in photochemical electrocyclic reactions, the product has the opposite stereochemistry to the starting material. This is known as the Woodward-Hoffmann rule, which states that the stereochemistry of the product is controlled by the symmetry of the transition state involved in the reaction.

It's also worth noting that electrocyclic reactions are highly stereoselective, meaning that they generally lead to a single stereoisomer of the product. This is due to the concerted nature of the reaction and the requirement for symmetry in the transition state.

To learn more about stereochemistry:

https://brainly.com/question/28658912

#SPJ4

Molecules of glucose (blood sugar) contain 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

Hope this helped :)

Answer:

C) They have different side chains.

Explanation:

Amino acids are the building blocks of proteins and are composed of an amine group (NH2), a carboxyl group (COOH), and a side chain that is unique to each amino acid. While all amino acids have the same basic structure, their side chains or R groups are different and give each amino acid its unique chemical properties. Therefore, the correct answer is that amino acids differ from each other based on their side chains.

Answer:

In explanation,

Explanation:

Tests of Big Bang: The CMB. The Big Bang theory predicts that the early universe was a very hot place and that as it expands, the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang, called the “cosmic microwave background", or CMB.

1. Antelope Canyon was formed by the erosion of Navajo Sandstone.

2. The appearance of water is determined

by the way the water molecules are moving.

3. Moist rising air near the Equator cools and condenses into clouds and, later, rain.

Answer:23.976

Explanation:830j = 197.6 cal. 197.6/100g=1.976 degrees. plus 22 degrees =23.976

Answer:

Temperature will revert to room temperature after the substance reacts fully. Heat energy flows between the chemical bonds of the added substance and water to the surroundings (elsewhere in the water, the beaker, a student's hand that touches the beaker).

Explanation:

Hot packs and cold packs eventually return to room temperature because of thermal equilibrium

Temperature is the degree of hotness or coldness of a body. We have to note that bodies often tend to attain thermal equilibrium with the surroundings. Hence heat flows from or to the body as required.

Hence, the need to attain thermal equilibrium with the  environment is the reason why hot packs and cold packs eventually return to room temperature.

Learn more about thermal equilibrium: https://brainly.com/question/1301963

When two monosaccharide units react via their hydroxyl (OH) functional groups, a disaccharide is formed. The linkage between the monosaccharide units in a disaccharide is known as a glycosidic linkage.

The glycosidic linkage is a covalent bond that joins the two monosaccharide units together. It is formed through a dehydration or condensation reaction, where the hydroxyl group from one monosaccharide combines with the hydrogen atom from the other monosaccharide, resulting in the formation of a water molecule. The remaining oxygen atom from each monosaccharide forms the glycosidic bond.

The specific type of glycosidic linkage depends on the orientation of the hydroxyl groups involved in the reaction. Common types of glycosidic linkages include alpha and beta linkages. In an alpha linkage, the hydroxyl group involved in the reaction is positioned below the plane of the ring, while in a beta linkage, the hydroxyl group is positioned above the plane of the ring.

The type and position of the glycosidic linkage in a disaccharide determine its properties and functionality. Different disaccharides, such as sucrose, lactose, and maltose, have distinct glycosidic linkages, resulting in their unique structures and functions.


To learn more about glycosidic linkage click here: brainly.com/question/6834008

#SPJ11

The given statement "when insulin is being mixed, NPH insulin is always drawn up first" is TRUE because when mixing insulins, it is important to follow the correct procedure to ensure accurate dosing and avoid contamination.

NPH insulin, an intermediate-acting insulin, is always drawn up first before short-acting or rapid-acting insulin.

This process, also known as "clear to cloudy," ensures that the clear insulin does not contaminate the NPH insulin vial.

First, you should draw air into the syringe equivalent to the NPH insulin dose and inject it into the NPH vial. Then, draw air equivalent to the short-acting insulin dose and inject it into the clear insulin vial.

Finally, draw the clear insulin into the syringe, followed by the NPH insulin. This method maintains the integrity of both insulins and ensures proper dosing.

Learn more about insulin at https://brainly.com/question/7023539

#SPJ11

Answer:

its letter d ..................................

Answer:

Option D:

evaporation from lakes and rivers

Explanation:

The water cycle is a natural cycle that shows how water moves and circulates within a natural environment. Water usually moves between the hydrosphere and the atmosphere through evaporation and condensation.

When water evaporates from the hydrosphere (the water bodies), it goes up into the atmosphere where it cools to become clouds. As more water evaporates, the clouds formed increase in mass. Once the clouds are too heavy to be held up in the sky, they fall down as precipitation (rain, snow, hail) into the water bodies and surrounding land below.

The most stable contributor's structure is the genuine structure of the resonance hybrid. The delocalization of electrons is what stabilizes the resonance hybrid. The potential resonance forms are quickly interconverted by a resonance hybrid.

Equivalent resonance types equally contribute to the hybrid's overall structure. Consider the resonance hybrid structure of a carboxylate group as an example. Different resonance contributors do not always contribute equally to the hybrid structure until they are equivalent to one another in terms of stability, as is the case for the carboxylate group, which has equivalent contributions from A and B as shown in the given figure. One resonance structure will more closely resemble the “actual” (hybrid) structure than another if it is more stable (lower in energy) than the other.

To know more about resonance hybrid, visit:

brainly.com/question/28318319

#SPJ4

Answer:

Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break. Molecules must collide with the proper orientation. A collision that meets these two criteria, and that results in a chemical reaction, is known as a successful collision or an effective collision.