Which element is metal?

Answer:

Glycolysis.

Explanation:

LOOK AT FIGURE BELOW

glycolysis, (first phase of cellular respiration) takes a glucose molecule through a series of redox reactions, taking some of the potential energy of that glucose and transferring it into ATP and NADH.

though, at the end of glycolysis, most of the energy of the glucose molecule is still stored in 2 3-carbon molecules known as pyruvate which have the chemical formula \(C_3H_3O_3\)

Answer: It will usually form the anion F- since it is extremely electronegative and a strong oxidizing agent. Fluorine is a Lewis acid in weak acid, which means that it accepts electrons when reacting. Fluorine has many isotopes, but the only stable one found in nature is F-19.

Explanation:

The most common ionic form of fluorine is the fluoride ion (F-). Fluorine, as an element, is highly electronegative, meaning it has a strong tendency to attract electrons towards itself.

In the process of forming an ion, fluorine gains one electron to achieve a stable electron configuration, resulting in the fluoride ion.

For example, when fluorine reacts with sodium (Na), fluorine gains one electron from sodium to form the fluoride ion (F-) while sodium loses one electron to become the sodium cation (Na+). This forms an ionic bond between the two ions, resulting in the compound sodium fluoride (NaF).

The fluoride ion is also commonly found in compounds such as calcium fluoride  and aluminum fluoride . In these compounds, fluorine forms ionic bonds with other elements, resulting in the formation of stable compounds.

Overall, the fluoride ion is the most common ionic form of fluorine due to its high electronegativity and its ability to form stable compounds with other elements.

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Answer:

Yes

Explanation:

Yes, but almost insignificantly. The regular boiling point of water is 100 degrees celcius, adding a small handfull of salt will increase the boiling point to roughly 100.04 degrees celcius. Therefore, it is almost insignificant but still does affect it. This is mainly because salt changes the way the molecules react thus making it harder for them to change state from liquid to gas. This ultimately causes the water to get hotter before boiling actually occurs.

Answer:

Modern chemistry describes the composition, structure, and physical and chemical properties of substances. ... The main aim of modern chemistry is to improve the communication and conversation among the scientists, researchers, engineers, and policymakers, who are working under the area of modern chemistry

Explanation:

I hope this helps you!!

Answer:

a) 113g Sr3(PO4)2

b) 1.5g H2

Explanation:

The number of moles of Sr used in the equation

= mass/ molar mass

=65.30/87

= 0.751mol

Since the mole ratio of Sr: Sr3(PO4)2 is 3:1

moles of Sr3(PO4)3 = 1/3*0.751

= 0.25mol

grams of Sr3(PO4)3 is = moles * molar mass

= 0.25 * 452

= 113g

b). Since mole ratio of Sr:H2 is 3:3

moles of H2 = 0.751 * 3/3 ---> 0.751 mol

grams of H2 is = moles * molar mass

= 0.751 * 2

= 1.502g

Answer:

A. Solids and liquids only

Explanation:

The boiling point of mercury is 356.73 degrees Celsius, which is significantly lower than the melting point of mercury, which is -38.83 degrees Celsius (-37.89 degrees Fahrenheit). Mercury is therefore a liquid at ambient temperature. Under these circumstances, it is the only metal that is frequently found in a liquid state.

A naturally occurring chemical element called mercury is present in coal deposits as well as rock found in the earth's crust. It has the atomic number 80 and the symbol "Hg" on the periodic table. It comes in a variety of shapes:

(Metallic) elemental mercury

mercury compounds that are inorganic

methylmercury and other organic substances

Historically known as quicksilver, elemental or metallic mercury is a gleaming, silver-white metal that is liquid at ambient temperature. Older thermometers, fluorescent lamps, and certain electrical switches all utilze it. When dropped, elemental mercury fragments into smaller droplets that may pass through tiny crevices or stick firmly to some objects. At room temperature, exposed elemental mercury can evaporate and turn into a poisonous vapor that is invisible and odorless. It turns into an odorless, colorless gas when heated.

Mercury is a liquid at room temperature, which is usually approximately 25 degrees Celsius (77 degrees Fahrenheit). The boiling point of mercury is 356.73 degrees Celsius, which is significantly lower than the melting point of mercury, which is -38.83 degrees Celsius (-37.89 degrees Fahrenheit). Mercury is therefore a liquid at ambient temperature. Under these circumstances, it is the only metal that is frequently found in a liquid state.

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The correct claim about x-rays is option D: Modern medical x-rays use stronger radiation than earlier types.

Explanation:

A: There is an increased risk of a fetus developing leukemia if exposed to x-rays. This claim is incorrect. While high doses of radiation, including x-rays, have been associated with an increased risk of cancer development, the risk to a fetus from diagnostic x-rays is generally considered very low, and the benefits of necessary medical imaging usually outweigh the potential risks.

B: Human-made x-rays are more harmful than naturally occurring x-rays. This claim is incorrect. X-rays are a form of electromagnetic radiation, and both naturally occurring and human-made x-rays have the same properties. The potential harm of x-rays depends on the dose and the specific circumstances of exposure, rather than the source.

C: Medical x-ray technology is not regulated by any federal agencies. This claim is incorrect. In the United States, medical x-ray technology is regulated by federal agencies such as the Food and Drug Administration (FDA) and the Nuclear Regulatory Commission (NRC). These agencies establish guidelines and standards to ensure the safe use of medical imaging equipment and the proper training of healthcare professionals.

D: Modern medical x-rays use stronger radiation than earlier types. This claim is correct. Over time, advancements in technology have allowed for the development of more efficient and precise medical imaging techniques. These advancements often involve the use of higher energy x-ray beams or enhanced imaging capabilities, which can result in higher radiation doses compared to earlier types of x-ray machines. However, it's worth noting that modern medical practices aim to minimize radiation exposure and follow the principle of ALARA (As Low As Reasonably Achievable) to ensure patient safety.

Therefore, option D is the correct claim about x-rays.

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The balanced chemical equation is:CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl(aq)

To write the net ionic equation, we eliminate the spectator ions (Na+ and Cl-):Ca2+(aq) + CO32-(aq) → CaCO3(s

A net ionic equation is a chemical equation that shows only those ions and molecules that undergo a chemical reaction in solution. It is written by eliminating the spectator ions from the overall chemical reaction.To write net ionic equations for the formation of precipitates, we first need to identify the reactants that form the precipitates. These are typically two aqueous solutions that contain ions that can react to form an insoluble solid product, or precipitate. Once we have identified the reactants, we can use solubility rules to determine whether or not a precipitate will form. If a precipitate will form, we can then write the balanced chemical equation for the reaction, and then write the net ionic equation by eliminating the spectator ions.

Let's look at some examples:

1. AgNO3 + NaCl → AgCl↓ + NaNO3

The reactants in this equation are AgNO3 and NaCl, and the product is AgCl, which is insoluble and forms a precipitate. The balanced chemical equation is:

AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)

To write the net ionic equation, we eliminate the spectator ions (Na+ and NO3-):

Ag+(aq) + Cl-(aq) → AgCl(s)

2. Pb(NO3)2 + 2NaI → PbI2↓ + 2NaNO3

The reactants in this equation are Pb(NO3)2 and NaI, and the product is PbI2, which is insoluble and forms a precipitate. The balanced chemical equation is:

Pb(NO3)2(aq) + 2NaI(aq) → PbI2(s) + 2NaNO3(aq)

To write the net ionic equation, we eliminate the spectator ions (Na+ and NO3-):

Pb2+(aq) + 2I-(aq) → PbI2(s)3. CaCl2 + Na2CO3 → CaCO3↓ + 2NaCl

The reactants in this equation are CaCl2 and Na2CO3, and the product is CaCO3, which is insoluble and forms a precipitate.

The balanced chemical equation is:

CaCl2(aq) + Na2CO3(aq) → CaCO3(s) + 2NaCl(aq)

To write the net ionic equation, we eliminate the spectator ions (Na+ and Cl-):

Ca2+(aq) + CO32-(aq) → CaCO3(s)

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Answer:

He is best known for introducing the atomic theory into chemistry, and for his research into colour blindness, sometimes referred to as Daltonism in his honour.

Explanation:

Answer:

Law of conservation of mass and the law of definite proportions could be explained using the idea of atoms.

In order to satisfy charge conservation and lepton number conservation the other products must be neutron.

The principle of conservation of mass states that, the sum of the initial mass of reactants must be equal to final mass of the products.

\(_{15}^{30}P\ --- > \ _{14}^{30} Si \ + \ ^{0}_{1} n\)

The balanced reaction of radioactive decay of phosphorous shows conservation of mass.

Thus, in order to satisfy charge conservation and lepton number conservation the other products must be neutron.

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Explanation:

Percentage composition of oxygen = (80/134) * 100% = 59.7%.

The gravitational force will be the same because as the mass of the objects increase, the separation distance will lead to weaker gravitational forces.

Gravitational force simply means the force that attracts objects that have mass. It pulls masses together.

From the information given, the gravitational force between the star and planet A will be the same as the gravitational force between the star and planet B.

As the mass increases, the force of gravitational attraction also increases. This will then lead to the separation distance will lead to weaker gravitational forces.

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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

Answer:

True

Explanation:

It's true because the dot diagram only shows electrons in the atom's outermost energy level.

Answer:

The change in entropy is negative; -ΔS

Explanation:

The entropy of a system measures the degree of randomness or energy dispersal of the system. The symbol for entropy is S.

For a given system, the change in entropy is symbolized as ΔS.

For an increase in entropy of a system, the final entropy must be greater than the initial entropy  i.e. Δfinal > Δinitial. Therefore ΔS > 0

For a decrease in entropy of a system, the final entropy must be less than the initial entropy  i.e. Δfinal < Δinitial. Therefore ΔS < 0 or ΔS is negative

A system with decreasing entropy may have a positive or negative free energy change, ΔG.

Also, a system with decreasing entropy may have a positive or negative enthalpy change, ΔH.

The two basic geologic processes which contributed to the formation of folded mountain ranges like in Glacier National Park include:

This is a geologic process which involve materials in the earth being washed away and transported to other parts by water, wind etc.

In the case of Glacier National Park, ice erodes the mountain thereby resulting in the folding of the sedimentary rocks.

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Answer:

hypothesis testing is usually used to assess the plausibility of a hypothesis by using sample data

Explanation:

The stroke volume in the next few cardiac cycles will be 100 ml if the end-diastolic volume is increased from 135ml to 165m.

The formula for stroke volume is given as;

SV = EDV - ESV

Here SV represents stroke volume, EDV represents end-diastolic volume and ESV represents end-systolic volume.

First, we calculate this person's end-systolic volume as follows;

If the person’s stroke volume was 70ml and his initial diastolic volume was 135 ml, then:

70 = 135 - ESV

70 - 135 = -ESV

-65 = -ESV

ESV = 65ml

Now the stroke volume in the next few cycles if the end-diastolic volume increase to 165 ml can be calculated as follows;

SV = 165 - 65

SV = 100ml

Therefore, the stroke volume in the next few cardiac cycles is calculated to be 100ml.

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Stack effect? I'm not totally sure about this...

Explanation:

Large amount of tiny particles of water droplets, dust and smoke are present on a misty day. These tiny particles in the air scatter blue colour of white light passing through it. When this scattered light reaches our eyes, the smoke appears blue.

to activate metabolic processes that wouldn't happen on their own; to move chemicals across membranes that are necessary; and to do mechanical activity, like moving muscles.

Acetylation. A relatively frequent metabolic process that involves amino, hydroxyl, or sulfhydryl groups is acetylation. Acetyltransferases catalyze the process by transferring the acetyl group from acetyl-coenzyme A.

Anabolic and catabolic responses are the two different categories of metabolic processes. Protein synthesis in living things and the synthesis of carbohydrates in plants are examples of anabolic responses. Cellular respiration and glycolysis are examples of catabolic processes that occur in several species.

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Answer:

Iron shavings

Explanation:

A substance that has a fixed chemical composition throughout and a mixture is when two or more substances are combined, but they are not combined chemically.

Answer: Yes, the image shows that mass is being conserved.

Explanation:

Atomic size gradually decreases from left to right across the periodic table because within a period of elements, all electrons are added to the same shell. However, at the same time, protons are being added to the nucleus, making it more positively charged. The effect of increasing proton number is greater than that of the increasing electron number. Therefore, there is a stronger nuclear attraction. This means that the nucleus attracts the electrons more strongly, pulling the atom's electron shells closer to the nucleus. As a result, the atomic diameter of the atom decreases.

Wearing appropriate clothing and protective gear in a laboratory is crucial for maintaining a safe and healthy working environment. It is important to follow the guidelines and regulations set by the laboratory to ensure the safety of everyone involved in the research and experiments. By taking these precautions seriously, lab workers can minimize the risk of accidents and injuries and focus on conducting successful experiments and research.

Laboratories are places where scientific experiments and research are conducted, and they require careful handling of hazardous materials, chemicals, and equipment. It is essential to follow certain guidelines to ensure the safety of the individuals working in the lab. One of the most important guidelines is to wear appropriate clothing and protective gear.

The clothing worn in the laboratory must be comfortable, durable, and provide adequate coverage of the body. Loose-fitting clothes, jewelry, and open-toed shoes should be avoided as they can increase the risk of accidents and injuries. Lab coats or aprons should be worn to protect clothing from chemicals, spills, and splashes.

Protective gear such as gloves, safety goggles, and face shields are also necessary in a laboratory. Gloves protect hands from chemical exposure, cuts, and punctures. Safety goggles and face shields protect the eyes and face from chemical splashes, flying debris, and harmful radiation.

Additionally, it is important to tie back long hair and avoid using hair products that could ignite or react with chemicals. Lab workers should also avoid wearing contact lenses as they can trap chemicals and cause eye damage.

Wearing appropriate clothing and protective gear in a laboratory is crucial because it minimizes the risk of accidents and injuries. Chemical spills, splashes, and explosions can cause serious harm to the body, and wearing protective gear can significantly reduce the severity of these injuries. Proper attire and gear can also prevent contamination of samples, equipment, and the environment.

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The additive that improves water's ability to penetrate porous materials such as bales of cotton, stacked hay, or mattresses and increases water's efficiency for heat absorption is a wetting agent or surfactant.


1. Wetting agents or surfactants are substances that reduce the surface tension of water, making it more effective at penetrating porous materials.
2. When added to water, these agents break the hydrogen bonds between water molecules, making the water "wetter."
3. As a result, the water can more easily penetrate porous materials like cotton bales, hay, or mattresses, reaching deeper into their structure.
4. This increased penetration allows for more efficient heat absorption, as the water can access and cool a larger portion of the material.
5. In firefighting applications, for example, wetting agents help water penetrate burning materials more effectively, making it easier to extinguish fires.

Wetting agents or surfactants are the additives that improve water's ability to penetrate porous materials and increase its efficiency for heat absorption.

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Answer:

neutrons is metal.......

A block with a volume of 150 cm³ and a density of 30 g/cm³ has a mass of 4,500 g. The correct option is A.

Density is an intrinsic property of matter, equal to the quotient between the mass and the volume.

A student has a block with a volume (V) of 150 cm³ and a density (ρ) of 30 g/cm³. We can calculate its mass (m) using the definition of density.

ρ = m/V

m = ρ × V = 30 g/cm³ × 150 cm³ = 4,500 g

A block with a volume of 150 cm³ and a density of 30 g/cm³ has a mass of 4,500 g. The correct option is A.

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