The taste sensation umami is most likely to attract us to foods that are:.

Answer:

Activation energy, in chemistry, the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.

Explanation:

To excel in your test, focus on understanding key concepts and vocabulary in your study materials. Practice solving problems and answering questions related to these concepts.                                                                                              

Review your notes and any handouts or readings your teacher has provided. Make sure you understand the key concepts and can apply them to different scenarios. If you have access to practice questions or past exams, work through those to get a sense of what types of questions you might encounter. Make sure you get a good night's sleep before the test and eat a healthy breakfast to fuel your brain. Science tests often require critical thinking and problem solving, so take your time and read each question carefully before selecting an answer.
Stay organized and manage your time well. Don't forget to review your notes, textbook, and any resources provided by your teacher. If you have specific topics or questions you're struggling with, feel free to ask for further assistance.

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Answer:

The same holds true for pH values above 7, each of which is ten times more alkaline (another way to say basic) than the next lower whole value. For example, pH 10 is ten times more alkaline than pH 9 and 100 times (10 times 10) more alkaline than pH 8.

Explanation:

A substance with a pH of 10  which is a base is 8 times  more basic than a substance with a pH of 2.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

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When a piece of hot Copper is added to 50 g of ethanol, causing its temperature to increase from 30ºC to 70ºC, the ethanol absorbs 1228 calories of heat.

To calculate the amount of heat absorbed by the ethanol, we can use the formula:

Heat absorbed = mass × heat capacity × change in temperature

Mass of ethanol = 50 g

Heat capacity of ethanol = 0.614 cal/g °C

Change in temperature = 70°C - 30°C = 40°C

Substituting these values into the formula:

Heat absorbed = 50 g × 0.614 cal/g °C × 40°C

Heat absorbed = 1228 cal

Therefore, the amount of heat absorbed by the ethanol is 1228 calories.

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This chemical molecule consists of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.There are 24 atoms in all.Six C atoms, twelve H atoms, and six O atoms make up one glucose molecule.

Six-carbon glucose is broken down during glycolysis into two pyruvate molecules each one with three carbons.In the glycolysis summary below, glucose transforms to two pyruvate molecules, producing two ATP molecules and two NADH molecules.

D-glucose, D-fructose, D-galactose, & D-mannose are the four most prevalent six-carbon sugars (hexoses).

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The labelled diagram of the potential energy has been attached below. Activation energy determines the rate of reaction.

In chemistry, the activated complex is a temporary, unstable arrangement of atoms that forms at the highest point in the energy profile of a chemical reaction. It represents the transition state between the reactants and the products, where the bonds of the reactants are partially broken and the bonds of the products are partially formed. The activated complex is also known as the transition state or the activated state, and it has a higher energy than both the reactants and the products. The activation energy required to reach the activated complex determines the rate of the reaction.

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It will take 28.57 mL of HCl to complete the reaction. The quantity of space that anything occupies is measured by its volume. Various items, including cups of wheat, gallons of milk, and cubic feet of helium

What does a liquid's volume mean?

The volume of liquid that a vessel holds is measured in standard units as the liquid measurement. It is sometimes referred to as the vessel's "volume" or "capacity."

What are mass and volume?

A three-dimensional object's volume is the area it takes up, and it is expressed in cubic units. Cm3 and in3 are two examples of cubic units. The amount of substance in an item may be determined by its mass, on the other hand.

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Answer:

137.9 this what I got on this

Answer:

137.9

Explanation:

Answer:

Carbonated water is a mixture,  

Explanation:

which means it contains two or more different chemicals.

Is Sodium Hydroxide an element, mixture, or compound?

An example would be placing sodium (Na) in water (H2O). Sodium creates a new chemical bond producing a new substance with new physical and chemical properties known as sodium hydroxide (NaOH). So, if a new chemical formula must be written after two or more substances combine it is not a mixture.

Answer:

metal ores are naturally occurring rocks that contain metals or metal compounds in sufficient amounts to make it worthwhile extracting them

Interpreting chromatograms involves identifying and assigning peaks to specific components based on their retention times and characteristics. The use of formulas or structures can aid in determining which peak corresponds to a particular component in the chromatogram.

Chromatography is a technique used to separate and analyze components in a mixture. Chromatograms are graphical representations of the separation obtained through chromatography. To interpret chromatograms and determine which peak corresponds to specific components, several factors are considered.

Retention time is an important parameter in chromatography. It refers to the time taken for a component to travel through the chromatographic system from the injection point to the detector. Components with different physical and chemical properties exhibit different retention times. By comparing the retention times of known components or reference standards, it is possible to identify and assign peaks in the chromatogram to specific components.

The use of formulas or structures can be valuable in interpreting chromatograms. The molecular formula or structural formula of a component provides information about its composition and connectivity of atoms. By comparing the characteristics of peaks in the chromatogram with the expected retention times and properties of components, one can make educated guesses or confirm the identity of specific components in the mixture.

Overall, interpreting chromatograms and determining which peak corresponds to particular components involves considering retention times, comparing with reference standards, and utilizing knowledge of molecular formulas or structural information. These approaches enable the identification and assignment of peaks to specific components in the chromatogram, aiding in the analysis and understanding of complex mixtures.

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Answer:

1. burial

2. Choice

3. pleasure

Explanation:

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True. The statement is true as a unit cell encapsulates the essential features and symmetry of the crystalline lattice and is repeated to form the complete lattice structure.

A unit cell is defined as the smallest repeating unit of a crystal lattice that, when repeated in three-dimensional space, generates the entire lattice structure. It represents the fundamental building block of the crystal lattice and contains all the structural information needed to describe the crystal. By translating the unit cell in three dimensions, the complete crystal lattice can be constructed.

The concept of a unit cell is fundamental in crystallography and is used to study and understand the arrangement and properties of crystalline materials. Different types of unit cells, such as cubic, tetragonal, and hexagonal, exist depending on the symmetry and arrangement of the lattice.

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Answer:

p-Nitro acetanilide. 2-Naphthol aniline dye.

The two organic compounds synthesized from inorganic substance​ is p-Nitro acetanilide and 2-Naphthol aniline dye.

Organic compounds are defined as any of the large class of chemical compounds in which one or more atoms of carbon are covalently liked to atoms of another elements, commonly hydrogen, oxygen and nitrogen.  

There are mainly four types of organic compounds

Inorganic compounds are defined as any substance in which two or more chemical elements are combined in definite proportion.  

There are mainly four class of inorganic compounds

Thus, the two organic compounds synthesized from inorganic substance​ is p-Nitro acetanilide and 2-Naphthol aniline dye.

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The volume of NaOH will give you the answer. Keep in mind that this equation assumes a 1:1 stoichiometric ratio between NaOH and the analyte.

To determine the volume of 8.50×10−2 M NaOH required to titrate each solution to the equivalence point, we need to know the concentration and volume of the solution being titrated.

However, I can explain the general process of titration. In a titration, a solution with a known concentration (the titrant) is added to a solution of unknown concentration (the analyte) until the reaction reaches its equivalence point. At this point, the stoichiometric ratio between the titrant and analyte has been achieved.

To find the volume of NaOH required, you would need to know the molar ratio between NaOH and the analyte, as well as the volume and concentration of the analyte. Then, you can use the equation:

(Molarity of NaOH) × (Volume of NaOH)

= (Molarity of analyte) × (Volume of analyte)

Solving for the volume of NaOH will give you the answer. Keep in mind that this equation assumes a 1:1 stoichiometric ratio between NaOH and the analyte.

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Answer:

metal,middle of the periodic table,solid

Explanation:

Because they have an extended structure, elements that are metal tend to be in the middle of the periodic table state at room temperature as solid

Because they have an extended structure, elements that are metal, tend to be in the middle of the periodic table, and stay solid state at room temperature.

Metals are those elements of the periodic table which are malleable soft and ductile the full stop, they are very reactive because they have valence electrons in their outermost shells. They are present in the middle of the periodic table.

Some metals are Aluminum, magnesium, titanium iron zinc, bronze, etc.   There are 92 metals are present in the periodic table. Metals are useful for making many things such as jewelry, wires, foil papers, and gates. Steel is the most useful metal in the world.

Thus, metal elements tend to be in the middle of the periodic table and maintain their solid state at ambient temperature because of their elongated structure.

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Answer:

A lunar phase is simply the shape of the sunlit part of the Moon, as seen from Earth. Phases are so strikingly obvious that we almost take them for granted. Moreover, they can be observed easily throughout the month from the backyard or via a simple glance out the window.

The Moon's shape changes for the following reasons:

The Moon orbits Earth.

Both Earth and the Moon orbit the Sun.

The Moon's orbit is the same length as the time it spins on its axis (about 28 Earth days), which means that we see the same part of the lunar surface all month.

The Sun illuminates both Earth and the Moon.

Get to Know the Lunar Phases

There are eight phases of the Moon to track each month.

New Moon: During New Moon, the side of the Moon facing us is not illuminated by the Sun. At this time, the Moon is not up at night, but it is up during the day. We just can't see it. Solar eclipses can occur during the New Moon, depending on how the Sun, Earth, and Moon line up in their orbits.

Waxing Crescent: As the Moon waxes (grows) into its crescent phase, it begins to show up low in the sky right after sunset. Look for a silvery-looking crescent. The side facing the sunset direction will be lit up.

First Quarter: Seven days after New Moon, the Moon is in first quarter. Only half of it is visible for the first half of the evening, and then it sets.

Waxing Gibbous: After First Quarter, the Moon appears to grow into a gibbous shape. Most of it is visible, except for a dark sliver that shrinks over the next seven nights. Look for the Moon at this time during the afternoon, too.

Full Moon: During the Full Moon, the Sun lights up the entire surface of the Moon that faces Earth. It rises just as the Sun sets and disappears beneath the western horizon when the Sun rises the next morning. This is the brightest phase of the Moon and it washes out the nearby part of the sky, making it difficult to see stars and faint objects such as nebulae.

Ever hear of a Super Moon? That's a Full Moon that happens when the Moon is closest in its orbit to Earth. The press likes to make a big deal about this, but it's really a very natural thing: On occasion, the Moon's orbit brings it closer to Earth. Not every month has a Super Moon. Despite the hype about Super Moons in the media, it's difficult for the average observer to notice one, because the Moon might appear only slightly larger in the sky than normal. In fact, the well-known astronomer Neil deGrasse Tyson pointed out that the difference between a regular Full Moon and a Super Moon is analogous to the difference between a 16-inch pizza and a 16.1-inch pizza.

Lunar eclipses occur only at Full Moons because the Moon is passing directly between Earth and the Sun in its orbit. Due to other perturbations in its orbit, not every Full Moon results in an eclipse.

The other Full Moon variation that often grabs media attention is a "Blue Moon." That's the name given to the second Full Moon that occurs in the same month. These don't happen all the time, and the Moon certainly doesn't appear blue. Full Moons also have colloquial names based on folklore. It's worth reading about some of these names; they tell fascinating stories about early cultures.

Waning Gibbous: After the glorious appearance of Full Moon, the lunar shape starts to wane, meaning it gets smaller. It's visible later at night and into the early morning, and we see a steadily shrinking shape of the lunar surface that's being lit up. The side that is lit up is facing toward the Sun, in this case, the sunrise direction. During this phase, look for the Moon during the day—it should be in the sky in the morning.

Last Quarter: At Last Quarter, we see exactly half the sunlit surface of the Moon. It can be seen in the early morning and daytime sky.

Waning Crescent: The last phase of the Moon before returning to New Moon is called Waning Crescent, and it is exactly what it says: a steadily-shrinking crescent phase. We can see only a small sliver from Earth. It's visible in the early morning, and by the end of the 28-day lunar cycle, it has vanished almost entirely. That brings us back to New Moon to start the new cycle.

Citation for work-Petersen, Carolyn Collins. "The Once-Mysterious Phases of the Moon Explained." ThoughtCo, Aug. 27, 2020, thoughtco.com/what-are-moon-phases-3883581.

Explanation:  

Something shorter-The different shapes of the lit portion of the Moon that can be seen from Earth are known as phases of the Moon. Each phase repeats itself every 29.5 days. The same half of the Moon always faces the Earth, because of tidal locking. So the phases will always occur over the same half of the Moon's surface.

The empirical formula will be c4h4o2.

An empirical formula seems to be a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number as well as arrangement of its atoms. This corresponds to the compound's element with the smallest whole number ratio.

Empirical, molecular, as well as structural chemical formulas are still the three basic categories. The easiest whole-number ratio of the atoms in a compound is shown by empirical formulae, the number including each variety of atom in a molecule is shown by molecular formulas, and the bonds between the atoms in a molecule will be shown by structural formulas.

Therefore, the empirical formula will be \(C_{4} H_{4} O_{2}\).

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Approximately 24.55 cm^3 of oxalic acid must be added to sufficient water to give a 1.500 liter solution with a formal concentration of 0.300 F.

To find the volume of oxalic acid needed to make a 1.500 liter solution with a formal concentration of 0.300 F, we need to use the equation:

Formal concentration (F) = (moles of solute) / (volume of solution in liters)

First, we need to calculate the moles of oxalic acid required. The formal concentration (F) is given as 0.300, so:

0.300 = (moles of oxalic acid) / 1.500

Rearranging the equation, we find:

moles of oxalic acid = 0.300 * 1.500

moles of oxalic acid = 0.450

Next, we can calculate the mass of oxalic acid needed using its molecular mass:

mass of oxalic acid = moles of oxalic acid * molecular mass

mass of oxalic acid = 0.450 * 90.03

mass of oxalic acid = 40.5145 g

Finally, we can calculate the volume of oxalic acid needed using its density:

volume of oxalic acid = mass of oxalic acid / density

volume of oxalic acid = 40.5145 g / 1.65 g/cm^3

volume of oxalic acid = 24.55 cm^3

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Answer:

Elements:lead

Explanation:

Lead is a metal element. because it is made of only metal atoms,it does not dissolve in water,but it does conduct electricity.

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Answer:

covalent bond

...........

Explanation:

..............................

Answer:

?

Explanation:

Answer:

1 grams 5.42*1036 is equal to 0.00017809058399464 mole.

Explanation:

This is assuming you mean 1036 not 10 to the power of 36.

Answer:

Now we can say the silver, gold and platinum do not react with oxygen because these three compounds are least reactive and present in downwards in the reactivity series.

Explanation:

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The sample of xenon gas contains 1.34 moles of gas when a sample of xenon gas collected at stp occupies a volume of 30.4 l.

To solve this problem, we can use the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature. At STP (standard temperature and pressure), the pressure is 1 atm and the temperature is 273 K.
So we can rearrange the ideal gas law to solve for n:
n = PV/RT
Plugging in the values given in the problem:
n = (1 atm)(30.4 L)/(0.0821 L·atm/mol·K)(273 K)
n = 1.34 moles

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The gas will spend approximately 12.5% of the time in the configuration where there are 3 molecules in each half of the box.

To calculate the percentage of time the gas is in the desired configuration, we need to determine the number of microstates that correspond to this configuration and compare it to the total number of possible microstates.

Let's denote the left half of the box as L and the right half as R. In the desired configuration, we have 3 molecules in L and 3 molecules in R.

The number of ways to choose 3 molecules out of 6 to be in L is given by the binomial coefficient, which can be calculated as:

C(6, 3) = 6! / (3! * (6-3)!)

C(6, 3)= 20

This means there are 20 different ways to arrange 3 molecules in the left half of the box.

Since the remaining 3 molecules must be in the right half, the total number of microstates corresponding to the desired configuration is also 20.

Now, let's determine the total number of possible microstates in the system.

Each molecule can independently occupy either L or R, resulting in 2 possibilities for each molecule. Since there are 6 molecules in total, the total number of microstates is:

2⁶ = 64

To find the percentage of time spent in the desired configuration, we divide the number of microstates corresponding to the desired configuration by the total number of microstates and multiply by 100:

(20 / 64) * 100 ≈ 31.25%

Therefore, the gas will spend approximately 31.25% of the time in the configuration where there are 3 molecules in each half of the box.

The gas will spend about 31.25% of the time in the configuration where there are 3 molecules in each half of the box.

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