I’m being timed pls help

Considering the Brønsted-Lowry theory, the correct answer is option B. a base can accept a hydrogen ion.

In the Brønsted-Lowry theory, a proton transfer occurs that requires the presence of a proton donor, that is, an acid, and a base that accepts them. In this way, the acid-base reaction is one in which the acid transfers a proton to a base.

Then, according to the Brønsted-Lowry Theory, a base is a substance capable of accepting protons (H⁺) in solution, and an acid is any species capable of donating a proton (H⁺).

According to the Brønsted-Lowry Theory, a base can accept a hydrogen ion.

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Answer:

Digestion of food.

Explanation:

I hope my answer help you.

Answer:

The digestive system is responsible for digestion of food

Answer:

net force is 80n ‐40n=40newton

the direction of motion is right

Answer: In liquid water, water molecules are moving faster. They are still close together, but they are no longer stuck in a rigid pattern as they are in ice. Water molecules in liquid water are constantly sliding past and bumping into each other; they keep moving from one place to another.

Answer:

they are different forms

Explanation:

ice is solid

and water is liquid

they also have different densities

In ideal conditions, 90 grams of glucose require 95.92 grammes of oxygen to react.

This tells us that 1 molecule of glucose must be oxidised by 6 molecules of oxygen (O2) (C6H12O6). Hence, 1 mole of glucose requires the oxidation of 6 moles of oxygen. Hence, 180 grams of glucose require 6 x 32 = 192 grams of oxygen to be oxidised.

Applying the balanced chemical equation

C6H12O6 + 6O2 -> 6CO2 + 6H2O

First, we need to calculate the number of moles of glucose in 90 grams:

Number of moles of glucose = mass / molar mass

Number of moles of glucose = 90 g / 180.16 g/mol (molar mass of C6H12O6)

Number of moles of glucose = 0.4996 mol

Then, we may determine how many moles of oxygen are needed by using the mole ratio between glucose and oxygen:

Number of moles of oxygen = 6 x number of moles of glucose

Number of moles of oxygen = 6 x 0.4996 mol

Number of moles of oxygen = 2.9976 mol

Lastly, we may convert the amount of moles to grammes using the molar mass of oxygen:

Mass of oxygen = number of moles x molar mass

Mass of oxygen = 2.9976 mol x 32.00 g/mol (molar mass of O2)

Mass of oxygen = 95.92 g

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Answer:

The mass of carbon dioxide formed is 12g.

The difference in an area with high concentration and an area with low concentration is called the concentration gradient.

A concentration gradient occurs when the concentration of particles is higher in one area than another.

In passive transport, particles will diffuse down a concentration gradient, from areas of higher concentration to areas of lower concentration, until they are evenly spaced.

This difference in an area with high concentration and an area with low concentration is called the concentration gradient.

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Number of atoms : 1.26 x 10²³

The mole is the number of particles(molecules, atoms, ions) contained in a substance  

1 mol = 6.02.10²³ particles

Can be formulated

N=n x No

N = number of particles

n = mol

No = Avogadro's = 6.02.10²³

0.21 moles of Al, so n = 0.21

Number of atoms :

\(\tt N=0.21\times 6.02\times 10^{23}\\\\N=1.26\times 10^{23}\)

Answer:

The answer is B. The number of atoms on each side of the reaction arrow must be the same.

Explanation:

Check your work to make certain you have the same number and type of atoms on the reactants side as on the products side

Neurotransmitter-gated ion channels are specialized proteins that respond to neurotransmitter molecules by opening and allowing the flow of ions across cell membranes. This process plays a crucial role in the transmission of signals in the nervous system.

ion channels are specialized proteins that allow the movement of ions across cell membranes. In the context of neurotransmitters, there are specific ion channels known as neurotransmitter-gated ion channels or ligand-gated ion channels. These ion channels respond to the binding of neurotransmitter molecules, which act as ligands. When a neurotransmitter molecule binds to a specific receptor on a neuron, it triggers the opening of the ion channel.

Once the ion channel is opened, ions such as sodium (Na+), potassium (K+), or calcium (Ca2+) can flow through the channel. This movement of ions leads to changes in the electrical potential of the neuron. These changes in electrical potential can either excite or inhibit the neuron, depending on the type of ion channel and the ions involved.

The opening and closing of neurotransmitter-gated ion channels are tightly regulated and play a crucial role in the overall functioning of the nervous system. They allow for the transmission of signals between neurons, enabling communication within the brain and throughout the body.

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Ion channels that respond to neurotransmitter molecules are described as ligand-gated ion channels or receptor-gated ion channels The interaction of certain neurotransmitter molecules causes these channels, which are protein structures anchored in the cell membrane, to open or close.

The ligand-gated ion channel opens when a neurotransmitter attaches to the receptor site on the ion channel. This happens because the binding alters the conformation of the channel protein.

This enables the passage of ions including calcium (Ca2+), potassium (K+), and sodium (Na+) through the cell membrane. Postsynaptic potentials, which are produced when ions flow through these channels, are electrical signals that are essential for neural transmission.

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Therefore, there are 4 electron groups around the central atom (Carbon) in CH2Cl2.

Regions of electron density surrounding an atom in a molecule or ion are referred to as "electron groups" in chemistry. They can be both bound electron pairs and lone electron pairs. Understanding electron groups is crucial for comprehending bond angles, molecular geometry, and the general form of a molecule.

For molecule CH2Cl2, the central atom is Carbon (C). To determine the number of electron groups around the central atom, follow these steps:

1. Determine the number of bonds the central atom forms with other atoms. Carbon (C) forms 2 bonds with Hydrogen (H) and 2 bonds with Chlorine (Cl).

2. Count each bond as one electron group.

In CH2Cl2, the central atom (C) has:

- 2 bonds with Hydrogen atoms (2 electron groups)

- 2 bonds with Chlorine atoms (2 electron groups)

Therefore, there are 4 electron groups around the central atom (Carbon) in CH2Cl2.

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Answer:

hi!

Explanation:

Well, some things I would do is to know the Periodic Table font and back. Know they elements and their class and atomic number and weight. Know how many atoms make up each element and how many protons, neutrons, and elements are in each atom.

Answer:inhibitors

Explanation:

I just took the quiz .

Answer:

answer is (A inhibitors)

Explanation:

Mineral resources can play a significant role in determining the success or failure of a town will boom or become a ghost town is important because the presence or absence of valuable minerals can significantly impact the town's economic growth and sustainability.

Mineral resources are valuable commodities that can bring economic growth and development to a town. Towns that are rich in mineral resources, such as gold, silver, copper, and coal, often experience a boom in their economy as mining companies invest in the area and provide job opportunities for the local population. This influx of income can lead to increased business activity, higher property values, and improved infrastructure, all of which contribute to the overall prosperity of the town.

If a town has abundant and easily accessible mineral resources, it can attract mining industries, creating job opportunities and stimulating the local economy. This can lead to a population increase, more businesses, and overall economic growth, resulting in a booming town. On the other hand, if mineral resources are scarce or depleted, mining industries may leave, leading to job loss and economic decline. This can cause people to move away in search of better opportunities, leaving behind abandoned buildings and infrastructure, ultimately turning the town into a ghost town.

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Answer:

Answer:Your skeletal system relies on the nutrients it gains from your digestive system to bulid strong healthy bones .A body system is a group of parts that work together to serve a common purpose .

maybe this might be ur answer

The temperature at 525.6ml is 236.52k

what is Charles law?

Assuming that the gas's pressure remains constant, the volume of a given mass of gas is precisely proportional to its absolute temperature. According to Charles' Law, a given amount of gas expands to a larger volume at constant pressure by a factor of 1/273 for every degree the temperature rises.

The formula for the relationship between volume and temperature is

V1 / T1 = V2 / T2, where V1 and T1 represent the starting volume and the absolute temperature, and V2 and T2 represent the end volume and the absolute temperature (the Kelvin temperature, not the Celsius temperature).

V1/T1 = V2/T2

V1= 525.6ml

T1= unknown

V2= 779ml

T2=351k

T1 =V1*(T2/V2)

    = 525.6ml * (351/779)

    =525.6*0.450

    =236.52k

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Chlorine serves as the reaction's limiting reagent, and sodium serves as the reaction's reagent. The point of equivalency, known as endpoint of the reaction, where the mass of sodium and mass of chlorine are equal.

The white, crystalline substance sodium chloride, or ordinary table salt, which comprises sodium cations and chloride anions, is created by a powerful reaction between the elements sodium and chlorine.

Because each chemical equation must be balanced and the amount of atoms of each element on the reactant side must match the number of atoms of each other, chemical equations serve as examples of the law of conservation of mass.

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Answer:

Au. fifififiof

Explanation:

djdjdjndsksidndndnendnnd

Answer:

Rb

Explanation:

The molecular mass response of the seas to climate change has recently resulted in a decline inside the width, length, or volume of an Arctic sea ice.

The Arctic often experiences end-of-summer minimum sea ice extents that are getting lower and less. The IPCC points to this shifting sea ice extent as evidence of a warming planet. However, Antarctica's extent of sea ice is expanding.

People may now quickly get information about events occurring in far locations because to the growth of the internet and the number of satellites. Consequently, the world has shrunk in size in modern times.

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The hydronium ion concentration in the solution is 4.22 x 10⁻¹³M

When NaOH is dissolved in water, it dissociates completely into Na+ and OH- ions:

NaOH → Na+ + OH-

Since the solution is basic, the hydroxide ion concentration is equal to the initial concentration of NaOH:

[OH-] = 0.0237 M

At 25°C, the ionic product of water (Kw) is 1.0 x 10⁻¹⁴. At equilibrium, the product of the hydronium ion concentration and the hydroxide ion concentration is equal to Kw:

[H3O+][OH-] = 1.0 x 10⁻¹⁴

Rearranging the above equation, we get:

[H3O+] = Kw/[OH-] = (1.0 x 10⁻¹⁴)/0.0237 M = 4.22 x 10⁻¹³M

Therefore, the hydronium ion concentration in the solution is 4.22 x 10⁻¹³M

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Answer:

In the northern hemisphere the currents look like they are curving to the right; in the southern hemisphere, they appear to curve to the left.

Explanation:

i did the quize

Answer:

Explanation:

The reactivity of elements in the periodic table is based on the number of electrons in there outermost shell. Elements (metals) that have few electrons in there outermost shell are highly reactive because it is easier to lose fewer number of electrons (in the outermost shell during a reaction) than to lose more electrons in the outermost shell - thus metals that have one electron in there outermost shell are most reactive and are more reactive than those that have two electrons in there outermost shell. Hence, metals in group 1 are the most reactive metals because they all have one electron in there outermost shell.

Non-metals that have fewer electrons to complete there octet configuration are highly reactive because it is easier to gain fewer number of electrons (in the outermost shell during a reaction) than to gain more number of electrons - thus nonmetals that have seven electrons in there outermost shell are more reactive than nonmetals that have six electrons in there outermost shell. Hence, nonmetals in group 17 are the most reactive nonmetals because they contain seven electrons and have just one electron left to complete there octet configuration.

Osmium (O s) is a chemical element with an atomic number of 76, which makes it one of the least abundant elements found in the Earth's crust. This transition metal is primarily used in alloys and catalysts due to its physical properties.

The density of osmium is exceptionally high, making it one of the densest substances known. The given dimensions of the block in this problem are \(6.5 cm * 9.0 cm * 3.25\)cm, and we are required to find its mass. Density is defined as the mass of a substance per unit volume, which is mathematically represented as D=m/V. Osmium has a density of 22.61 g/cm³, according to the periodic table of elements. As a result, the mass of the osmium block can be calculated using the formula :mass (m) = Density (D) * Volume (V)m = \(22.61 g/cm³ * (6.5 cm * 9.0 cm * 3.25 cm)m = 22.61 g/cm³ * 199.125 cm³m = 4501.558 g The mass of the osmium block is 4501.558\)grams, or approximately 4.5 kg.

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Answer:

Al: 3

S: 6

Explanation:

Al is in Group III. This means that it has 3 valence electrons.

S is in Group VI. This means that it has 6 valence electrons.

I hope this helps :)

Answer:

Aluminum, a member of the IIIA family, loses three electrons to form a 3+ cation. ... And all of them form an anion with a single negative charge. The VIA elements gain two electrons to form anions with a 2- charge. The VA elements gain three electrons to form anions with a 3- charge.

To prepare 240 mL of two-thirds strength hydrogen peroxide solution for a wound irrigation using normal saline as the diluent, you need to mix 160 mL of full-strength hydrogen peroxide with 80 mL of normal saline.

This creates a total volume of 240 mL, with two-thirds of it being hydrogen peroxide and one-third being normal saline.

When using a hydrogen peroxide solution for wound irrigation, it is important to ensure that the concentration of the solution is appropriate for the type of wound being treated. Generally, hydrogen peroxide solutions of 2-3% concentration are used for wound irrigation. Higher concentrations can cause tissue damage and skin irritation.

Additionally, it is important to ensure that the diluent used is appropriate for the type of wound being treated. For example, normal saline is most commonly used for wound irrigation, but other diluents such as sterile water may be used for different types of wounds.

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Answer:

1. Matter

2. Weight

3. Solid

4. Liquid

5. Gas

6. Solid

7. Gas

8. Liquid

9. Gas

10. Solid

11. Density

12. Mass

13. Volume

14. Temperature

15. Boiling point

The major difference between nucleotides of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) lies in their sugar and base components.

DNA nucleotides contain the sugar deoxyribose, while RNA nucleotides have ribose.

This difference affects the overall structure and stability of the molecules. Additionally, DNA uses the nitrogenous base thymine (T), whereas RNA uses uracil (U) instead.

This base substitution impacts base pairing and the molecules' function in cells. DNA primarily stores genetic information, while RNA plays diverse roles such as coding, decoding, and regulating gene expression.

The double-stranded helix structure of DNA contrasts with RNA's single-stranded structure, allowing RNA to form various shapes for different cellular tasks.

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Answer:

physcial change

Explanation:

As it has visible changes on shape and size