____and___ concentrations are high outside of neurons.

Answer:

false

Explanation:

you have bromine , its a non metal and liquid in room temperature

The formula for triphosphorous tetrafluoride is P3F4.

To write the formula for triphosphorous tetrafluoride, we need to combine the chemical symbols for phosphorus and fluorine, along with their respective valencies. Phosphorus has a valency of 3, and fluorine has a valency of 1.

Since there are three phosphorus atoms, we write 'P' with a subscript of 3. Similarly, since there are four fluorine atoms, we write 'F' with a subscript of 4.

Combining these symbols and subscripts, the formula for triphosphorous tetrafluoride is P3F4.

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The chemical formula for triphosphorous tetrafluoride is P₃F₄. Tetra denotes the presence of four fluorine atoms in this combination, while tri denotes the presence of three phosphorous atoms.

Phosphorus has the chemical symbol P, while fluorine has the symbol F. The numbers in the subscripts represent the number of atoms of each element that make up the compound.

The valence (combining) numbers of each element must be taken into account in order to calculate the triphosphorous tetrafluoride's chemical composition.

Typically, phosphorus has a valence number of +5, which indicates that it may make five bonds. Typically, fluorine has a valence value of 1, which indicates that it can make only one bond.

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The correct balanced equation for the reaction between zinc and dihydrogen sulfate is:

Zn + H₂S -> ZnS + H₂ (Option C)

We can balance chemical equation by simply obeying the law of conservation of matter.

The law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.

Now, we shall write the balance equation as shown below:

Zinc + Dihydrogen sulfate ->

Zn + H₂S ->

Zinc displaces H to produce H₂ as shown below:

Zn + H₂S -> ZnS + H₂

Since the atoms of the elements on both sides of the equation are equal, then the equation is balanced

Thus, the correct answer is: Zn + H₂S -> ZnS + H₂ (Option C)

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Option 1 is correct. There are three types of UV radiation: UVA, UVB, and UVC. UVC has the shortest wavelength, around 100-280 nm, but is mostly absorbed by the Earth's atmosphere and doesn't reach the surface. UVB has a wavelength of 280-320 nm and is responsible for sunburns and skin damage. UVA has the longest wavelength, around 320-400 nm, and can penetrate deeper into the skin, causing aging and wrinkling.

Option 2 is incorrect because UV radiation, in general, can be damaging to the Earth's surface, causing skin cancer, harming plant life, and contributing to climate change.

Option 3 is partially correct because UV radiation with a wavelength of 300 nm falls within the UVC range, but it's important to note that this type of radiation is mostly absorbed by the ozone layer before reaching the Earth's surface.

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Answer:

A. Carbon hope this helps

Answer:

D. Carbon. I guess that's the answer

Polysaccharide is a type of carbohydrate (such as glycogen, cellulose, or starch) whose molecules are made up of many sugar molecules bound together.

What purpose does the polysaccharide serve?

In general, polysaccharides serve one of two purposes: they either store energy or sustain structural integrity. Highly compact polymers like starch and glycogen are employed to store energy. In plants and animals, cellulose and chitin, two linear polymers, provide structural support.

What is plant polysaccharide?

More than half of the carbs we consume come from starch, which is the most significant source of carbohydrates in the human diet. Granules of it can be found in plants. Amylose and amylopectin, two polymers, are combined to form starch. 10%–30% amylose and 70%–90% amylopectin make up natural starches.

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Answer:

a molecule of an element is called atomicity

Explanation:

Evirmental disruption because if they had stability then they would not need change. The other two don't make sense....I hope this helps

1. Chemical substances in food dissolve in saliva. 2. Taste receptors are stimulated. 3. Signals are sent to the thalamus. 4. The frontal lobe perceives taste.

Substances can be defined as materials or substances that are composed of one type of atom or molecule. They are made up of atoms and molecules that are combined together in a specific way and can be observed in the physical world. Substances can be either natural or man-made and can be either solid, liquid, or gas. They have a unique set of properties such as boiling point, melting point, and density, which helps to describe them.

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Answer:

Difference in temperature.

Explanation:

Conduction is the movement of heat energy through a substance or from one substance to another by direct contact of atoms and molecules. Heat moves directly from one molecule to another. The heat energy speeds up the movement of the atoms and they collide with other molecules setting them into faster motion.

Answer:

The nucleus consists of 9 protons and 10 neutrons.  Nine electrons occupy available electron shells.

Answer:

Because trees give off carbon dioxide witch can cycle threw numerous energy sources.

H₂ (g) + O₂ (g) ⇒ H₂O (g) because Hydrogen and oxygen gas both exist as diatomic molecules. The water is in gaseous state due to the heat given off by the combustion reaction.

Combustion, often known as burning, is a high-temperature exothermic redox chemical reaction that occurs between a fuel and an oxidant, typically atmospheric oxygen, to generate oxidized, generally gaseous products in a mixture known as smoke. A combustion reaction is a type of chemical reaction that occurs when any combustible component reacts with an oxidiser to generate an oxidised product. Fires and the release of energy in the form of heat are frequently associated with combustion processes. A hydrocarbon generally combines with oxygen in most combustion processes to produce carbon dioxide and water.

Here,

Because hydrogen and oxygen gas exist as diatomic molecules, H2 (g) + O2 (g) = H2O (g). Because of the heat produced by the combustion reaction, the water is in a gaseous condition.

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Answer:

b

Explanation:

Answer:

A. Barium

Explanation:

hope this helps! :)

The purpose is to evaluate any differences in sign or magnitude between the theoretical predictions based on standard reduction cell potentials and the actual experimental results.

In the given table, the standard reduction potentials are listed for each voltaic cell. These values represent the potential difference between the anode and cathode in each cell.

By comparing these calculated cell potentials with the measured values, any differences in sign or magnitude can be observed.

The calculated cell potentials are based on theoretical values and assume ideal conditions, while the measured values take into account real-world factors such as temperature, concentration, and electrode surface area.

Differences in sign may arise due to the reversal of anode and cathode in the experimental setup, while differences in magnitude can be attributed to various factors affecting the efficiency of the electrochemical reactions, such as concentration gradients and kinetic limitations.

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Answer:

104.5j

Explanation:

Answer:

Hydrogen finds a variety of application due to its dual nature. Following are some important uses of hydrogen:

Hydrogen is used in the synthesis of ammonia and the manufacture of nitrogenous fertilizers.

Hydrogenation of unsaturated vegetable oils for manufacturing vanaspati fat.

It is used in the manufacture of many organic compounds, for example, methanol.

Hydrogen chloride is a very useful chemical and is prepared from hydrogen.

Hydrogen can reduce many metal oxides to metals by metallurgical processes.

Hydrogen is used as rocket fuel in many space research activities.

Hydrogen fuel is being experimented within the automotive industry with hydrogen fuel cells.

The mass of the substance is calculated by subtracting the empty graduated cylinder's mass from the mass of the cylinder with the substance: 15.08 g - 12.55 g = 2.53 g.

We subtract the empty graduated cylinder's mass from the substance's mass to find its mass. The empty cylinder weighs 12.55 g, whereas the filled one weighs 15.08 g. 2.53 g separates them.

The graded cylinder's substance added 2.53 g. This calculation assumes the graduated cylinder does not affect measured mass.

The substance's mass (2.53 g) is calculated by subtracting the initial (12.55 g) from the final (15.08 g). This method uses the mass difference before and after adding a substance to a container to measure its mass.

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Answer:

2.14 Na2S + 1.99 HCl ----> 3.20 NaCl + 0.935 H2S

Explanation:

The Balanced equation is

Na2S + 2HCl = 2NaCl + H2S

As we can see -

78.0452 g/mol of sodium sulfide reacts with 2 mole of HCl.

Mass of one mole of HCl = 36.458 g/mol

So, 78.0452 g/mol of sodium sulfide reacts with 2* 36.458 g/mol of HCL to produce 2* 58.44 g of NaCl and 34.1 g/mol of H2S

Thus,

2.14g of sodium sulfide will react with (2* 36.458/78.0452)* 2.14 of HCl

2.14g of sodium sulfide will react with 1.99 g of HCl

2.14 Na2S + 1.99 HCl ----> (2* 58.44/78.0452) *2.14 NaCl + (34.1/78.0452) * 2.14 H2S

2.14 Na2S + 1.99 HCl ----> 3.20 NaCl + 0.935 H2S

Answer:

Hydrosphere

Explanation:

Hydro meaning water

The addition of ice at the end of the heating process is important because it increases the solubility of the aspirin product.

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Answer:

losing valence electrons

Explanation:

please Mark as BRAINLIST answer

Answer:

Flame colors are produced from the movement of the electrons in the metal ions present in the compounds. For example, a sodium ion in an unexcited state has the electron configuration \(1s^{2} 2s^{2} 2p^{6}\).

Explanation:

The amount of heat needed to boil 132 g of water (\(H_{2} O\)), beginning from a temperature of 7.4 °C, is 298 kJ.

The amount of heat needed to boil water can be calculated using the following equation:

Q = m * ΔH

Where Q is the amount of heat required, m is the mass of the water, and ΔH is the heat of vaporization of water, which is 40.7 kJ/mol.

First, we need to determine the number of moles of water in 132 g of water:

n = m / M

where M is the molar mass of water, which is approximately 18.015 g/mol.

n = 132 g / 18.015 g/mol = 7.326 mol

Now we can calculate the amount of heat required to vaporize this amount of water:

Q = n * ΔH

Q = 7.326 mol * 40.7 kJ/mol = 298 kJ

Therefore, the amount of heat needed to boil 132 g of water starting from a temperature of 7.4 °C is 298 kJ.

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Answer:

Material A must be a conductor, while materials B and C are insulators. Electrons can move easily through conductors but not through insulators.

Explanation:

Answer:

a) Area of the telescope lens is \($1.076391014 \times 10^{-5} \mathrm{ft}^{2}$\)

b) Technician needs to clean the lens \($1.83 \times 10^{3} s$\).

Explanation:

a) The area of the lens is \($6.439 \times 10^{3} \mathrm{~mm}^{2}$\)

To convert it into \($f t^{2}$\)

\($1 \mathrm{~mm}=0.00328084 \mathrm{ft}$\)

\($1 \mathrm{~mm}^{2}=(0.00328084)^{2} \mathrm{ft}^{2}$\)

\($1 \mathrm{~mm}^{2}=1.076391014 \times 10^{-5} \mathrm{ft}^{2}$\)

So,

\($6.439 \times 10^{3} \mathrm{~mm}^{2}=6.439 \times 10^{3} * 1.076391014 \times 10^{-5} \mathrm{ft}^{2} .$\)

\($6.439 \times 10^{3} \mathrm{~mm}^{2}=6.93088174 \times 10^{-2} \mathrm{ft}^{2}$\)

b) Time required to polish a entire area of lens

\($=6.439 \times 10^{3} \mathrm{~mm}^{2} \times \frac{43.5 \mathrm{~s}}{1.53 \times 10^{2} \mathrm{~mm}^{2}}$\)

\($=1.83 \times 10^{3} \mathrm{~s}$\)

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