consider the chemical reaction a(g) b(g) ab(g). the concentration of a is tripled while the concentration of b is held constant. as a result, the rate of reaction increases by a factor of 27. what is the order of reaction for a in this reaction?

NADH carries electrons and hydrogens to the electron transport chain.

The main role of NADH and FADH₂ is to donate electrons and hydrogen to the electron transport chain. NADH stands for Nicotinamide Adenine Dinucleotide (NAD) + Hydrogen (H). It also plays an important role of generating energy in the body. During the electron transport chain both NADH and FADH₂ donate electrons by providing hydrogen molecules to the oxygen molecules to create water. Both Kreb's cycle and glycolysis produces NADH.

The NADH that are produced by the body are used for generating energy for the body. Supplements are also taken for NADH but they have some side effects like blood pressure and other effects.

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Answer:

Water pollution.

Explanation:

This is because water pollution refers to the release or disposal of harmful substances called contaminants which contaminate water bodies which include rivers, oceans, lakes e.t.c.. These harmful substances affect aquatic organisms and make water unfit for good use. This can lead to the death if aquatic lives in the water bodies, release of bad smells and make the water bad . A leaking underground storage tank or wastewater pouring into a river from a pipe can be a source of water pollution.

Answer: it is C because it is part of a “animals” body as I would explain it.

A mixture has a mas of 450 grams. Of that mixture,35 grams is sulfur . Therefore, 11% is the percentage of sulfur in the mixture.

The mass percent equation is defined as the mass of each element in one mole of the compound, as well as the molar mass. With these masses, you can calculate each element's mass proportion.

In order to represent the mass percent of a solution, the kilograms of solute are divided by the kilograms of solution, and the result is multiplied by 100.

percentage of sulfur = mass of sulfur/ mass of mixture×100

mass of sulfur= 5 grams

mass of mixture =450 grams

substituting all the given values in the above equation, we get

percentage of sulfur = 5 / 450=0.011×100= 11%

Therefore,  11% is the percentage of sulfur in the mixture.

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Answer:

Scientific change is: "Any change in the scientific mosaic, i.e. a transition from one accepted theory to another or from one employed method to another. "

Explanation:

Answer:

electrical and mechanical engineering

Answer:

electrical engineering

Explanation: i took quiz

Answer

1.25M

Explanation

to calculate the molality we use the following equation

Molality = moles of solute / Kg of solvent

step 1: to find the moles of glucose we divide the mass by the Molar mass of glucose

moles = mass (g)/ Molar mass (g/mol)

= 18.0 g / 180,156 g/mol

= 0.0999 moles of glucose

now that we have moles of glucose, the next step is to convert 80.0g of water to Kg of water

1 kg = 1000g

Kg of water = 80g/1000g /kg

= 0.08Kg

Molality = 0.0999 mols / 0.08 kg

= 1.25M

Answer:

An object's thermal energy is dependent upon its temperature and mass. The higher the temperature of a given quantity of a substance, more is its thermal energy. Similarly, for the same temperature, higher mass of a substance will contain more thermal energy

Answer:

Compounds

Explanation:

A compound is a substance formed when two or more elements are chemically joined. (For example Water, salt, and sugar are compounds.) When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.

Answer:

Ancient CO₂ levels can be measured from

1) Air bubbles trapped in deep ancient ice cores (up to 800,000 years ago) or

2) Tree rings (up to 10,000 years ago)

Explanation:

The percentages of CO₂ concentration in the atmosphere from previous or ancient times are found by analyzing the CO₂ content in trapped air located in the deep ancient ice cores present in Antarctica and Greenland such as the EPICA Dome C cores

As the ice is drilled though, the air released from trapped bubbles are captured for analysis and the time frame for the captured bubbles can date back up to 800,000 years

Ancient CO₂ levels can also be measured from tree rings which provide ancient CO₂ levels up to 10,000 years

Answer:

Scientific notation

Explanation:

For example 10000000000 =10 to the power of ten

Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

During the reaction given above, electrons are transferred from Cu(s) to Ag+ (aq) (option 1).

An ionic equation is a chemical equation in which the dissolved ionic compounds are written as separated ions.

According to this question, a balanced ionic equation is given as follows: Cu(s) + 2Ag+ (aq) → Cu²+ (aq) + 2Ag(s)

Based on the above equation, electrons are transferred from solid copper to silver ion, making copper the reducing agent while silver ion is the oxidizing agent.

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The rate at which atoms of radioactive sources, or radionuclides, disintegrate is measured in curies. A curie is a unit of measure for the amount of radioactive material present. It represents the amount of radioactive material in which 37 billion atoms disintegrate per second.

The disintegration of radionuclides produces ionizing radiation, which can be measured in rems or roentgens.

A rem is a unit of measurement for the amount of ionizing radiation absorbed by living tissue, while a roentgen is a unit of measurement for the amount of ionizing radiation in the air.
In summary, the rate at which atoms of radioactive sources disintegrate is measured in curies, while the amount of ionizing radiation produced by the disintegration can be measured in rems or roentgens. It is important to understand these units of measurement in order to properly monitor and regulate exposure to ionizing radiation, as it can have harmful effects on living organisms.

The rate at which atoms of radioactive sources (radionuclides) disintegrate is measured in curies (c).
To explain further, radioactive sources contain unstable atoms, called radionuclides. These radionuclides undergo disintegration or decay, during which they emit radiation. To quantify this process, we use various units.
Curies (Ci) is a unit of measurement specifically used to express the activity of a radioactive substance, or how quickly atoms in the radioactive source are disintegrating. One curie represents 37 billion disintegrations per second.

It's important to note the other units you mentioned:
- Rems (roentgen equivalent in man) is a unit used to measure the biological impact of ionizing radiation on human tissue.
- Roentgens (R) is a unit used to measure the exposure to ionizing radiation, specifically the amount of radiation that produces a certain amount of ionization in air.
- Rods is not a unit related to radioactivity, but might be confused with control rods, which are used in nuclear reactors to control the rate of nuclear reactions.

In summary, the appropriate unit for measuring the rate at which atoms of radioactive sources disintegrate is curies.

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Answer:

a closed series circuit

Answer:

An open series circuit

Explanation:

I'm late but for future people...

I took the test.

In order to write balanced half-reactions for the oxidation and reduction that occur in a chemical reaction, we first need to identify the species being oxidized and reduced. The (aq) and (s) labels indicate the states of the reactants and products.

Let's assume the reactants are A(aq) and B(s), and the products are C(aq) and D(s).

The oxidation half-reaction involves the species being oxidized, which loses electrons. The reduction half-reaction involves the species being reduced, which gains electrons.

To balance the half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced.

For example, if A is being oxidized and B is being reduced, the balanced half-reactions could be:

Oxidation half-reaction:
A(aq) → C(aq) + e-

Reduction half-reaction:
B(s) + e- → D(s)

So, the oxidation half-reaction is A(aq) → C(aq) + e- and the reduction half-reaction is B(s) + e- → D(s). To write the balanced half-reactions, we need to ensure that the number of atoms on both sides of the equation is the same and that the charges are balanced. In the oxidation half-reaction, A(aq) is being oxidized and loses an electron (e-). The resulting product is C(aq). On the other hand, in the reduction half-reaction, B(s) is being reduced and gains an electron (e-). The resulting product is D(s). By balancing the atoms and charges, we can write the balanced half-reactions as follows:
Oxidation half-reaction: A(aq) → C(aq) + e-
Reduction half-reaction: B(s) + e- → D(s)

The balanced half-reactions for the oxidation and reduction in the chemical reaction are A(aq) → C(aq) + e- and B(s) + e- → D(s), respectively.

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The calorimeter constant Ccal for the coffee cup calorimeter is 23.562 J/°C. Option A is correct.

The heat gained by the cooler water is equal to the heat lost by the warmer water when they mix, and can be calculated using the formula:

q = m × c × ΔTwhere:

q =heat gained or lost (in Joules, J)

m = mass of the water (in grams, g)

c = specific heat of water (in Joules per gram per degree Celsius, J/g°C)

ΔT = change in temperature (in degrees Celsius, °C)

We can start by calculating the heat lost by the warmer water:

q₁ = m₁ × c × ΔT₁

where:

m₁ = 25.000 g (mass of the warmer water)

ΔT₁ = (45.00 - 31.40) = 13.60°C (change in temperature of the warmer water)

c = 4.184 J/g°C (specific heat of water)

q₁ = (25.000 g) × (4.184 J/g°C) × (13.60°C) = 1427.872 J

Similarly, we can calculate the heat gained by the cooler water:

q₂ = m₂ × c × ΔT₂

where:

m₂ = 25.00 g (mass of the cooler water)

ΔT₂ = (31.40 - 20.30) = 11.10°C (change in temperature of the cooler water)

c = 4.184 J/g°C (specific heat of water)

q₂ = (25.00 g) × (4.184 J/g°C) × (11.10°C) = 1167.144 J

Since the heat lost by the warmer water is equal to the heat gained by the cooler water, we have:

q₁ = q₂

1427.872 J = 1167.144 J + Ccal × ΔT

where:

ΔT = (31.40 - 23.56) = 7.84°C (change in temperature of the calorimeter and any other contents)

Solving for Ccal, we get:

Ccal = (1427.872 J - 1167.144 J) / (7.84°C)

= 23.562 J/°C

Hence, A. 23.56 is the correct option.

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--The given question is incomplete, the complete question is

"25.000 grams of water at 45.00oC was added to 25.00 grams of water at 20.30oC in a coffee cup calorimeter. Upon mixing, the equilibrium temperature attained by the system was 31.40oC. The specific heat of water is 4.184 J/goC. What is the calorimeter constant Ccal in J/oC for the coffee cup calorimeter?Choice: A) 23.56 B) 232.8 C) 47.14 D) 465.1 "--

The number of moles of the reactant directly correlates with the quantity of energy generated during the reaction. Therefore, we must first measure the energy released per mole of potassium chlorate in order to establish how many moles of potassium chlorate really interacted.

Potassium chlorate has an enthalpy of formation of -420.1 kJ/mol. This indicates that 420.1 kJ of energy are released for every mole of potassium chlorate that reacts.

Therefore, we must divide the total energy released (45,225 kJ) by the enthalpy of production (-420.1 kJ/mol) to determine how many moles of potassium chlorate reacted. As a consequence, we have 107.8 moles of potassium chlorate that have undergone reaction.

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Explain to the kids that since there is essentially no —which is required for fire—if the bag contains only pure carbon dioxide, the splint would burn out right away.

H2 - Hydrogen Pure hydrogen gas will burst into flames when a burning splint is added to it, making a popping sound. Oxygen (O2) A smouldering splint will rekindle when exposed to a sample of pure oxygen gas.

The flame goes out as a result of carbon dioxide replacing the oxygen it requires to burn (the effect). A popping sound is produced when a flame is near hydrogen because of how the gas burns.

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Answer:

H3PO2 is monoprotic as the structure 1 OH group

H3PO3 is diprotic as the structure  has 2 OH groups

H3PO4 is triprotic as the structure has 3 OH groups

Explanation:

H3PO2 has 1 ionizable proton, H3PO3 has 2 ionizable protons, and H3PO4 has 3 ionizable protons per formula unit.

1. H3PO2(l): Hypophosphorous acid
Structure: H-P(OH)2
Ionizable protons: 1
Explanation: In this structure, there is only one acidic hydrogen atom directly bonded to the phosphorus atom, which can be ionized to form H+ ion.

2. H3PO3(l): Phosphorous acid
Structure: H2P(OH)O
Ionizable protons: 2
Explanation: In this structure, there are two acidic hydrogen atoms directly bonded to the phosphorus atom. Both can be ionized to form H+ ions.

3. H3PO4(l): Phosphoric acid
Structure: H3PO4
Ionizable protons: 3
Explanation: In this structure, there are three acidic hydrogen atoms directly bonded to the phosphorus atom via oxygen atoms. All three can be ionized to form H+ ions.

In summary, H3PO2 has 1 ionizable proton, H3PO3 has 2 ionizable protons, and H3PO4 has 3 ionizable protons per formula unit.

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Answer:

The molecular weight of glucose (C6H12O6) is 6(12.01) + 12(1.01) + 6(16.00) = 180.18 g/mol.

So, the number of moles of glucose present in 240.0 g can be calculated as follows:

n = m/M = 240.0 g / 180.18 g/mol = 1.33 mol

And the number of molecules of glucose can be calculated as follows:

N = n x Avogadro's constant = 1.33 mol x 6.022 x 10^23 molecules/mol = 7.98 x 10^23 molecules

Therefore, the number of molecules of glucose present in 240.0 g is 7.98 x 10^23 molecules, rounded to the nearest whole number.

So, the coefficient is 7.98 and the exponent is 23.

Explanation:

Answer:

CH4 and O2

Explanation:

The reactants of a chemical reaction are those that are on the left side of the chemical equation. In this case, methane (CH4) and oxygen (O2) which are on the left side, are the reactants.

Answer:

Chromium, calcium, and osmium

Explanation:

These elements are metals, considering this, these elements electron shells(orbitals) are further away from the nucleus, with this, their attractions are not as strong as non-metals, so some of their electrons are able to move freely.

When you accumulate many atoms, these metals can form a "sea of electrons"  because they all have loose electrons interacting with each other. This allows easy conduction of heat and electricity.

Answer:

Chromium

Calcium

Osmium

Explanation:

The elements likely conduct electricity well are chromium, calcium and osmium. As these are metals and are observed to be good conductors of heat and electricity. They have extra electrons to donate and hence flow of electrons cause them to be a good conductor of electricity. Rest iodine is a non-metals which is not good conductors of electricity. Carbon is not itself a good conductor but one of its allotrope which is graphite is a good conductor of electricity.

Answer: It's the first one :3

Explanation:

The data table that correctly describes the parts of an atom is ; Data Table 1

An atom is composed of three subatomic particle ( neutron, proton and electron ). The proton and neutron makeup the nucleus of an atom while the electrons found in a cell  fills up the outermost shell of the cell.

The neutron has a neutral charge with an atomic mass unit ( amu ) of 1. while the electrons has a negative charge and the proton has a positive charge.

Hence we can conclude that the data table that correctly describes the parts of an atom is Data Table 1.

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Answer:

MgCl2

Explanation:

because of the salt containing Cl

A. n = 105 lines/mm = 105000 lines/m

d*sin θ  = m*λ

(1/105000) * sin θ = 1*498*10^-9 ⇒     θ =  3.0 degree

Also  (1/105000) * sin θ = 1*569*10^-9 ⇒     θ =  3.43 degree

Δθ = 3.43° – 3.0°

Δθ = 0.43°

b) Chromatic Resolving power, R = λ / Δλ

λ  / Δλ  =  m (width) n

589 /0.59 = 2 (width) (105000)

Width = 4.75 mm

Diffraction gratings can split beams of different wavelengths into a spectrum of related lines through the principle of diffraction. In certain directions, only waves of certain wavelengths have obtained the rest are destroyed by their respective interference. other.

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Taking into account the reaction stoichiometry, 0.14175 grams of H₂O are formed when a 17.50 mL sample of a 0.150 M solution of H₃PO₄ reacts with excess Ba(OH)₂.

In first place, the balanced reaction is:

2 H₃PO₄ + 3 Ba(OH)₂  → Ba₃(PO₄)₂ + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= amount of moles÷ volume

In this case, you know for the reactant H₃PO₄:

Replacing in the definition of molarity:

0.150 M= amount of moles÷ 0.0175 L

0.150 M× 0.0175 L= amount of moles

0.002625 moles= amount of moles

So, 0.002625 moles of H₃PO₄ react.

The following rules of three can be applied: if by reaction stoichiometry 2 moles of H₃PO₄ form 108 grams of H₂O, 0.002625 H₃PO₄ form how much mass of H₂O?

\(mass of H_{2}O=\frac{0.002625 moles of H_{3}PO_{4} x108 grams of H_{2}O}{2moles of H_{3}PO_{4}}\)

mass of H₂O= 0.14175 grams

Finally, 0.14175 grams of H₂O are formed when a 17.50 mL sample of a 0.150 M solution of H₃PO₄ reacts with excess Ba(OH)₂.

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