why do enzymes work poorly at below optimum temperature?

Ethanol.

Formula: C2H5OH

Molar mass: 46.07 g/mol

Density: 789 kg/m³

Answer:

they were facing the oppisite ways

Explanation:

Given Figure 2 below shows a set of contour lines for temperature, and the question wants you to complete a simple analysis of temperature. The analysis should be made for the 75 and 70°F isotherms. The 80°F contour is also to be analyzed.

Figure 2 From the image above, we can identify the following contour lines and their values:Contour line C1 is for a temperature of 60°F.Contour line C2 is for a temperature of 65°F.Contour line C3 is for a temperature of 70°F.Contour line C4 is for a temperature of 75°F.Contour line C5 is for a temperature of 80°F.Using the given information, we can then proceed to answer the questions as follows:Analysis for the 75°F isotherm Contour line C4 shows a temperature of 75°F. This means that any point lying on this contour line has a temperature value of 75°F. Therefore, we can conclude that the following regions have a temperature of 75°F:Region A: This region is enclosed by contour lines C3 and C4.

Thus, it has a temperature of 75°F.Region B: This region is enclosed by contour lines C4 and C5. Thus, it has a temperature of 75°F.Analysis for the 70°F isotherm Contour line C3 shows a temperature of 70°F. This means that any point lying on this contour line has a temperature value of 70°F. Therefore, we can conclude that the following regions have a temperature of 70°F:Region C: This region is enclosed by contour lines C2 and C3. Thus, it has a temperature of 70°F.Region D: This region is enclosed by contour lines C3 and C4. Thus, it has a temperature of 70°F.Analysis for the 80°F contourContour line C5 shows a temperature of 80°F. This means that any point lying on this contour line has a temperature value of 80°F. Therefore, we can conclude that the following regions have a temperature of 80°F:Region E: This region is enclosed by contour lines C4 and C5. Thus, it has a temperature of 80°F.

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Answer:

the blanket let's him slide it across the floor because the has less friction with the floor than the furniture.

Answer:

Blanket underneath the furniture may reduce the kinetic friction

Explanation:

When sliding an object across a surface, the force of kinetic friction will oppose the movement of the object.

By placing a blanket between the object and the surface, the kinetic friction coefficient may be reduced.

Therefore, putting a blanket underneath the furniture may reduce the kinetic friction coefficient, then making it easier to slide the forniture.

(Hi fyi this answer took a lot of time & effort to make sure it was accurate, precise and to the point to be produced, so if you could opt this answer as the brainliest it would mean the world to me,)

Stay positive and Take care,

A fellow mate,

Cheers !

First, they may produce direct and relatively short-lived effects, such as stimulation of the isolated uterus or relaxation of the isolated tracheal chain preparation.

Secondly, in doses too low to produce a direct effect, they may produce a long-term potentiation of the effects of other stimulants.

pproximately 3.00 × 10^23 particles of HCl reacted.

HCl Particles Reacted: 3.00x10^

2HCl + K2CO3 → 2KCl + H2O + CO2

If 6.0 × 10^23 particles of H2O are produced, how many particles of HCl were reacted?

The balanced chemical equation for the reaction between HCl and K2CO3 is:

2HCl + K2CO3 → 2KCl + H2O + CO2

From the equation, we can see that 2 moles of HCl react to produce 1 mole of H2O. Therefore, the number of moles of HCl that reacted can be calculated as:

moles of HCl = moles of H2O / 2

We are given that 6.0 × 10^23 particles of H2O are produced. To convert this to moles, we need to divide by Avogadro's number:

moles of H2O = 6.0 × 10^23 / 6.022 × 10^23 = 0.997 moles (approx.)

Using the balanced equation, we can see that 1 mole of H2O is produced from 2 moles of HCl. Therefore, the number of moles of HCl that reacted is:

moles of HCl = 0.997 moles H2O / 2 = 0.4985 moles HCl (approx.)

Finally, we can convert moles of HCl to particles of HCl by multiplying by Avogadro's number:

particles of HCl = moles of HCl x Avogadro's number

particles of HCl = 0.4985 x 6.022 × 10^23

particles of HCl = 3.00 × 10^23 particles (approx.)

Therefore, approximately 3.00 × 10^23 particles of HCl reacted.

It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.

It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;

The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)

Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)

Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).

Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.

Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.

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The beverage that does not typically contain diuretic compounds is Coca Cola (option a).

While coffee (option b), tea (option c), and alcohol (option d) can have diuretic effects, Coca Cola is not typically known to have significant diuretic properties. It's important to note that individual responses to these beverages may vary, and excessive consumption of any liquid can lead to increased urination. However, compared to coffee, tea, and alcohol, Coca Cola is generally not considered to be a diuretic beverage.

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The new volume is calculated in each condition as follows using ideal gas equation .

The ideal gas law is the equation of condition of an ideal gas. It states that pressure into volume is equal to nRT where n is moles and T is temperature.

1. P1V1=P2V2

50*100= V2 * 10

V2= 500 Liter

2. V1/T1 = V2/T2

20/200 = V2/400

V2= 40 Liter

3. P1V1=P2V2

100*20= V2 * 60

V2= 33.33 Liter

4.  V1/T1 = V2/T2

800/400 = V2/100

V2= 200 Liter

5. P1V1/T1 = P2V2/T2

20*100/100 = 10*v2/200

v2= 400 Liter

6. P1V1/T1 = P2V2/T2

5*200/100 = 10*v2/50

v2= 50 Liter

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Answer:

Translated < what is the maximum number of electrons in the sublevel 4s?

answer 32 electrons

Answer:

3

Explanation:

H2O has a higher intermolecular force (hydrogen bonding) where N2 only has London Dispersion.

To restore the white thread on Bo Jackson Nike Air SC Trainer white again once they've oxidized, you can use a mixture of hydrogen peroxide and baking soda.

Bo Jackson Nike Air SC Trainer white thread can turn yellow due to oxidation. There are several ways to clean the yellowed thread on Nike shoes, but the most effective way to do it is by using hydrogen peroxide and baking soda. First, mix hydrogen peroxide with baking soda to create a paste. Next, use a toothbrush to scrub the mixture onto the thread area and let it sit for around an hour. Rinse the shoes with water and air dry them.

It's essential to note that the hydrogen peroxide and baking soda mixture could be damaging to the shoe if left on too long. Therefore, it's crucial to follow the instructions and use the mixture sparingly. Additionally, make sure that the shoes are entirely dry before wearing them to avoid any potential damage or injury.

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Convection, and radiation are forms of heat transfer did Nicholas consider when building his fire shelter.

When building a fire shelter, there are three forms of heat transfer to consider: conduction, convection, and radiation. It is important to design the shelter to minimize heat transfer from the fire to the shelter, as well as from the shelter to the occupants inside. Typically, materials with low thermal conductivity, such as soil or clay, are used to construct the walls of the shelter to reduce heat transfer through conduction.

A design that includes air gaps or insulating materials can also help to reduce heat transfer through convection. Additionally, the use of a heat shield, such as a reflective surface or layer of insulation, can help to reduce heat transfer through radiation.

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Answer:

The two forms of heat transfer that Nicholas considered when building his fire shelter were convection and conduction.

Explanation:

pluto

Answer:

It is ultracool dwarfs make up about 15% of the astronomical objects.................blah blah blah

Explanation:

took test

However, I can provide a written reaction scheme and mechanism for the reactions involved.  

Reaction scheme:

Synthesis of Benzimidazole:

O-phenylenediamine + formic acid → benzimidazole + water

Formation of C14H12N2:

Benzimidazole + nBuLi → intermediate A

Intermediate A + PhCH2Br → C14H12N2 + LiBr

Mechanism:

Synthesis of Benzimidazole:

The reaction between O-phenylenediamine and formic acid is an acid-catalyzed condensation reaction, which proceeds through a series of proton transfers and dehydration steps to yield benzimidazole and water.

Formation of C14H12N2:

The first step involves the deprotonation of the imidazole ring in benzimidazole by nBuLi to generate an intermediate A. The intermediate A is then attacked by the benzyl bromide at the benzylic carbon, which leads to the formation of a new carbon-carbon bond and elimination of the lithium bromide (LiBr) leaving group. The final product is C14H12N2.

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Answer:

1) AgNO3 (aq) + KCl (aq) -> AgCl (s) + KNO3 (aq)

Ag+ (aq) + NO3- (aq) + K+ (aq) + Cl- (aq) -> AgCl (s) + K+

(aq) + Cl- (aq)

Ag+ (aq) + Cl- (aq) -> AgCl (s)

2) 2NaCl (aq) + K2CO3 (aq) -> Na2CO3 (aq) + 2KCl (aq)

3) Fe(NO3)3 (aq) + 3NaOH (aq) -> Fe(OH)3 (s) + 3NaNO3

(aq)

Fe³+ (aq) + 3NO3- (aq) + 3Na+ (aq) + 3OH- (aq) ->

Fe(OH)3 (s) + 3Na+ (aq) + 3NO3- (aq)

Fe³+ (aq) + 3OH- (aq) -> Fe(OH)3 (s)

4) BaBr2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaBr (aq)

Ba²+ (aq) + 2Br- (aq) + 2Na+ (aq) + SO4²- (aq) ->

BaSO4 (s) + 2Na+ (aq) + 2Br- (aq)

Ba²+ (aq) + SO4²- (aq) -> BaSO4 (s)

Explanation:

Sorry, I couldn't make the charges superscript. Don't know how.

On #2, no reaction occurs; everything stays aqueous.

Answer:i am doing

good

Explanation:

The sentence that can fill in the blanks with the appropriate terms is: "The Dead Sea contains 33 per cent more dissolved solids and is almost ten times saltier than seawater.

The Dead Sea, also known as the Salt Sea, is a saltwater lake that is bordered by Jordan to the east and Israel and Palestine to the west. The lake has a salinity level that is significantly higher than that of the world's oceans. It is around 33 per cent more salty than seawater, and it is almost ten times saltier.

The reason behind the high salinity level of the Dead Sea is due to its location. It is located at the lowest point on the earth's surface, and the water flows into it from several small rivers that carry salt and minerals from the surrounding land. As the water evaporates, the concentration of salt and minerals increases. This process has been happening for millions of years, which has led to the salt concentration of the Dead Sea being almost 10 times higher than that of the world's oceans.

In addition to the high salt concentration, the Dead Sea also contains 33 per cent more dissolved solids. The dissolved solids include magnesium, potassium, and calcium, which are essential minerals for the human body. The minerals are known to have therapeutic properties, which have led to the development of various cosmetic and medicinal products that use the minerals found in the Dead Sea.

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Answer:

2Na2S + Cd(NO3)2 ---> CdS + 2NaNO3

The coefficients therefore are 1,1,1&2

In perovskite, the oxidation number of titanium (Ti) can vary depending on the specific compound and its composition. However, in many perovskite structures, titanium is commonly found in the +4 oxidation state (Ti4+).

In perovskite, the general formula is represented as ABX3, where A and B are cations and X is an anion. In this structure, titanium is typically the B-site cation, and it tends to exhibit a +4 oxidation state to maintain charge neutrality.

It's important to note that there can be variations and substitutions within the perovskite structure, leading to different oxidation states for titanium or other cations.

Therefore, the oxidation state of titanium in perovskite can vary depending on the specific compound and its composition.

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Answer:

D

Explanation:

Explanation:

In chemistry, thermodynamics, and many other related fields, phase transitions (or phase changes) are the physical processes of transition between the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases.

Answer:

In chemistry, thermodynamics, and many other related fields, phase transitions are the physical processes of transition between the basic states of matter: solid, liquid, and gas, as well as plasma in rare cases. A phase of a thermodynamic system and the states of matter have uniform physical properties.

Explanation:

When sodium phosphate reacts with sulfuric acid, forming sodium sulfate and phosphoric acid, the stoichiometric coefficient for sulfuric acid in the balanced chemical equation is 3.

In every balanced chemical equation, the total number of individual atoms on the reactant side must be equal to the total number of individual atoms on the product side. The stoichiometric coefficient is the number written in front of each reactants and products that tells how many moles of each are needed in the reaction.

The chemical equation for the given reaction is:

\(Na_{3} PO_{4}\) + \(H_{2} SO_{4}\) = \(Na_{2} SO_{4}\) + \(H_{3} PO_{4}\)

Put the necessary stoichiometric coefficient to balance each element.

Balancing Na:

\(2Na_{3} PO_{4}\) + \(H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(H_{3} PO_{4}\)

Balancing P:

\(2Na_{3} PO_{4}\) + \(H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(2H_{3} PO_{4}\)

Balancing S:

\(2Na_{3} PO_{4}\) + \(3H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(2H_{3} PO_{4}\)

Notice that H and O are already balanced.

Hence, the balanced chemical equation for the reaction is:

\(2Na_{3} PO_{4}\) + \(3H_{2} SO_{4}\) = \(3Na_{2} SO_{4}\) + \(2H_{3} PO_{4}\)

where 3 is the stoichiometric coefficient of sulfuric acid, \(H_{2} SO_{4}\).

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Answer:

Yes

Beryllium is a chemical element with the symbol Be and atomic number 4. It is a steel-gray, strong, lightweight and brittle alkaline earth metal. ... Notable gemstones high in beryllium include beryl (aquamarine, emerald) and chrysoberyl.

Calcium is a mineral that is necessary for life. In addition to building bones and keeping them healthy, calcium enables our blood to clot, our muscles to contract, and our heart to beat. About 99% of the calcium in our bodies is in our bones and teeth.

Answer:

ill give you a brief answer

normally when o2 is attached it is a combustion reaction so this reaction tells that p4 is burned in presence of air to form p4o10 which is the ash that remains

the balanced equation tells that 5 moles of o2 is rrquired to burn 1 mole of p4 to form 1 mole of p4o10

The given balanced equation is tells us about,

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Answer:

its C

Explanation:

Answer:

you will find 3 in aluminium

hydrogen should be b 3

and oxygen is 9

The amount of heat absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon can be calculated using the given DH0 value for the reaction. The correct answer is option D: 1.33 ´ 104 kJ.

To calculate the heat absorbed in the reaction, we need to use the given DH0 value and the stoichiometry of the reaction. According to the balanced equation, 1 mole of SiO2 reacts with 3 moles of C to produce 1 mole of SiC and 2 moles of CO.

First, we need to calculate the moles of SiO2 in 3.00 grams using its molar mass. The molar mass of SiO2 is approximately 60.08 g/mol. Therefore, 3.00 grams of SiO2 is equal to 3.00 g / 60.08 g/mol = 0.04996 mol.

Next, we can use the DH0 value of +624.6 kJ to calculate the heat absorbed in the reaction. Since 1 mole of SiO2 is involved in the reaction, the heat absorbed can be calculated as follows:

Heat absorbed = DH0 × moles of SiO2

= +624.6 kJ/mol × 0.04996 mol

≈ 1.33 ´ 104 kJ

Therefore, the correct answer is option D: 1.33 ´ 104 kJ, representing the amount of heat absorbed in the complete reaction of 3.00 grams of SiO2 with excess carbon.

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To produce 120.0 grams of glucose through photosynthesis, approximately 4.0 moles of CO2 are required.

In the photosynthetic reaction, 6 moles of carbon dioxide (CO2) and 6 moles of water (H2O) react to produce 1 mole of glucose (C6H12O6) and 6 moles of oxygen (O2). To determine the moles of CO2 required for the given amount of glucose, we need to use the concept of stoichiometry.

The molar mass of glucose (C6H12O6) can be calculated by adding the atomic masses of its constituent elements: 6 carbon atoms (6 × 12.01 g/mol), 12 hydrogen atoms (12 × 1.01 g/mol), and 6 oxygen atoms (6 × 16.00 g/mol). Adding these masses gives a molar mass of 180.18 g/mol for glucose.

To find the moles of glucose, we divide the given mass of glucose (120.0 grams) by its molar mass: 120.0 g / 180.18 g/mol = 0.6667 moles.

Since the stoichiometric coefficient of CO2 in the reaction is 6, we know that for every mole of glucose produced, 6 moles of CO2 are consumed. Therefore, to produce 0.6667 moles of glucose, we would require 6 times that amount of CO2: 0.6667 moles × 6 = 4.0 moles of CO2.

Hence, to produce 120.0 grams of glucose through photosynthesis, approximately 4.0 moles of CO2 are required.To determine the moles of CO2 required for the synthesis of 120.0 grams of glucose (C6H12O6) through photosynthesis, we can use the balanced equation for photosynthesis: 6 CO2 + 6 H2O → C6H12O6 + 6 O2. By comparing the stoichiometric coefficients, we find that 6 moles of CO2 are needed to produce 1 mole of glucose. Therefore, to produce the given amount of glucose, we would require 6 times the moles of CO2, which is determined by dividing the given mass of glucose by its molar mass.

Explanation:

In the photosynthetic reaction, 6 moles of carbon dioxide (CO2) and 6 moles of water (H2O) react to produce 1 mole of glucose (C6H12O6) and 6 moles of oxygen (O2). To determine the moles of CO2 required for the given amount of glucose, we need to use the concept of stoichiometry.

The molar mass of glucose (C6H12O6) can be calculated by adding the atomic masses of its constituent elements: 6 carbon atoms (6 × 12.01 g/mol), 12 hydrogen atoms (12 × 1.01 g/mol), and 6 oxygen atoms (6 × 16.00 g/mol). Adding these masses gives a molar mass of 180.18 g/mol for glucose.

To find the moles of glucose, we divide the given mass of glucose (120.0 grams) by its molar mass: 120.0 g / 180.18 g/mol = 0.6667 moles.

Since the stoichiometric coefficient of CO2 in the reaction is 6, we know that for every mole of glucose produced, 6 moles of CO2 are consumed. Therefore, to produce 0.6667 moles of glucose, we would require 6 times that amount of CO2: 0.6667 moles × 6 = 4.0 moles of CO2.

Hence, to produce 120.0 grams of glucose through photosynthesis, approximately 4.0 moles of CO2 are required.

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