Ice charts (Image)

Need help figuring how this works.

Answer:

During high-intensity interval training, a pH decrease may affect how well glycogen is used. Acidosis, often known as a drop in pH, is a condition that develops when lactic acid builds up in the muscles. The glycogen phosphorylase enzyme, which converts glycogen to glucose, may become inhibited as a result of this acidosis. As a result, glycogen is used less frequently as a source of energy. As a result of this decline in glycogen usage, tiredness and poor performance during intense activity may result. However, the impact of acidosis on glycogen use is poorly understood, and more investigation is needed to identify the underlying mechanism.

Explanation:

Answer:

During high-intensity interval exercise, a drop in pH can affect glycogen utilization in several ways. A decrease in pH, also known as acidosis, can lead to a decrease in the activity of enzymes involved in glycogen metabolism. For example, glycolytic enzymes, which break down glycogen into glucose and other metabolites, are sensitive to changes in pH and their activity may be decreased in acidic conditions.

In addition, acidosis can also reduce the availability of glycogen in muscle cells, as it can cause the breakdown of glycogen into lactate, which can interfere with the normal functioning of the muscle. This, in turn, can lead to decreased energy production and a reduction in the ability of the muscles to perform high-intensity activities.

Explanation:

Therefore, a drop in pH during high-intensity interval exercise can have a negative impact on glycogen utilization, leading to decreased energy production and reduced athletic performance.

Answer: Synthesis

Explanation:

This is Synthesis because the reactants combine to form the products.

Answer : Slope = -3, intersection = 11

We need to isolate for y here.

From 9x+3y=33, we need to derive a y=mx+b equation.

First, we take away 9x as follows:

9x+3y-9x=33-9x

The positive and negative values of 9x cancel our on the y side, so we are left with 3y=-9x+33

Now we need to get rid of the y coefficient:

(3y)÷3=(-9x+33)÷3

We need to effectuate the division on both sides to cancel out the coefficient, so we are left with y=-3x+11

Answer: y-intercept = y = 11 - 3x

Slope is m = -3

Answer:

D Heat

Explanation:

Tell me if you need explain

ALLEN

Answer: 30.3 g

I had this question..If i hadn't done this I'd be confused.

The independent variable is the the widths of the wires.

In an experimental setup, the independent variable is the variable that is manipulated or changed by the researcher. It is also referred to as the "predictor variable" or the "explanatory variable."

The idea behind manipulating the independent variable is to observe its effect on another variable, which is called the dependent variable. The dependent variable is the variable that is thought to be affected by the independent variable.

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The empirical formula of a compound gives the whole number ratio of atoms of various elements. The molecular formula of the compound is S₂O₈.

The molecular formula of a compound is defined as the formula which gives the actual number of atoms of various elements present in one molecule of the compound.

Here 33.38 % 'S' = 33.38 g

66.62 % 'O' = 66.62 g

Number of moles (n) = Given mass / Molar mass

'n' of 'S' = 33.38 / 32 = 1.04 moles

'n' of 'O' = 66.62 / 16 = 4.16 moles

The ratio of number of atoms of 'S' and 'O' = 1 : 4

So empirical formula is SO₄.

Since the molar mass = 192.14g

Molecular formula = (SO₄)ₙ

192.14 = n × (32 + 4 × 16)

n = 2

Thus the molecular formula is S₂O₈ .

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Answer:

The molar mass of iron (Fe) is approximately 55.845 g/mol or 55,845 Daltons.

Explanation:

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Answer:

the final temperature of the aluminum after losing 2.87 x 10^3 J of heat is approximately 91.3 °C.

Explanation:

The relationship between heat, mass, and temperature change can be described by the formula:

Q = mcΔT

where Q is the heat transferred (in joules), m is the mass of the sample (in kilograms), c is the specific heat capacity of aluminum (about 0.9 J/g°C), and ΔT is the change in temperature (in degrees Celsius).

Rearranging the equation to solve for ΔT, we get:

ΔT = Q / (mc)

First, we need to convert the mass from grams to kilograms:

m = 53.2 g / 1000 g/kg = 0.0532 kg

Next, we can plug in the values for Q, m, and c and solve for ΔT:

ΔT = (2.87 x 10^3 J) / (0.0532 kg * 0.9 J/g°C) = approximately 63.7 °C

Finally, we can subtract the ΔT from the initial temperature to find the final temperature:

T_final = 155 °C - 63.7 °C = 91.3 °C

Answer:

Radioactive isotope carbon-14

Explanation:

Radiocarbon dating, also known as carbon-14 dating, is a method that is commonly used to determine the age of ancient objects. This method relies on the measurement of the radioactive isotope carbon-14. Carbon-14 is formed in the upper atmosphere by the interaction of cosmic rays with nitrogen-14 atoms. It then enters the food chain and is taken up by plants and animals. Upon death, the carbon-14 in the organism begins to decay, with a half-life of approximately 5,700 years. By measuring the amount of carbon-14 remaining in an ancient object, scientists can determine how long it has been since the object died and calculate its age.

Another method for determining the age of ancient objects is uranium-lead dating, which relies on the measurement of the isotopes uranium-238 and lead-206. This method is useful for determining the age of rocks and minerals, as well as for dating the age of the Earth itself.

Answer:

Radioactive isotope carbon-14

Explanation:

Answer:

Explanation: Density is an intensive property of matter. This means that the value of density is independent of the quantity of matter present. It is measured by mass per unit volume. So, even though a gold statue may contain more mass or a larger quantity of gold than a gold coin, the density of both objects will remain the same, as they will have the same mass per unit volume.

We're given that the enthalpy of formation of 1 mol of NH3 (aq) is -80.29 kJ/mol. This is the amount of energy it takes to form 1 mol of NH3 (aq).

To determine the enthalpy required to form 3 mol of NH3 (aq), multiply -80.29 by 3:

[tex]-80.29*3\\= -240.97[/tex]

b) -240.97 kJ

The three ways to increase the rate of calcium carbinate and hydrochloric acid are decreasing pressure, increasing temperature and use of catalyst.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.

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The relationship between rate and reactant concentration is given by the rate equation. Here reaction 2 is 2.4289 times faster than 1.

An equation which expresses the experimentally observed rate of a reaction in terms of the molar concentrations of the reactants that determine the rate of a reaction is called the rate equation.

Rate ∝ concentration

Rate = k [ concentration ]

Rate₁ / Rate₂ = k [conc]₁ / [conc]₂

= k × 0.210 / k × 0.510

= 0.4117

Rate₁ =  0.4117 × Rate₂

Rate₁ / 0.4117 = Rate₂

2.4289 × Rate₁ = Rate₂

Thus reaction 2 is 2.4289 times faster compared to reaction 1.

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Derivate planar density expressions for FCC(100) and (111) is 1/4R² and 4R²√3, number of  atoms are centered on the [100] in FCC is 4.

Atoms can be arranged either closely or widely together. A periodic three-dimensional pattern of atoms is packed into crystalline solids like metals. Atoms are not subject to periodic packing in non-crystalline materials like silicon oxide. A unit cell is a crystal structure's fundamental building block. The packing density of crystals is measured by planar density.

For (100) plane one atom at each of  four cube corners

,each of which is shared with four adjecent unit cells.

Centre atom lies with in the unit cell.

Thus there is the equivalence of 2 atoms associated with this FCC(100) plane.

The plannar section in the above figure is square.

Where

The side lengths are equal to unit cell edge length = 2R√2

Area of the square =( 2R√2 )2

                            =8R2

a) So plannar density of (100) plane

PD (100)plane =(number of atoms centerd at (100) plane)  / (area of plane)

                    = (2) / 8R2

                    =1 / 4R2

∴Plannar density of  FCC(100) is 1 / 4R2.

b) There are 6 atoms whose centre lie on this plane .

Total  equivalence is 2 atoms associated with this FCC(111) plane at centered.

In above diagram

 (2R)2 + h2 = 4R2

which leads to h = 2R√3

Thus Area =4(R) (h) /2

                 =4(R) (2R√3) /2

                 =4R2√3

PD (111)plane =(number of atoms centerd at (111) plane)  / (area of plane)

                    =(2) / 4R2√3

                     =1/ (2R2√3)

∴Plannar density of  FCC(111) is 1/ (2R2√3).

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In order for 30mL of sodium hydroxide solution to completely react, 0.061 grams of potassium hydrogen phthalate are required.

A measurement of the amount of matter in an item, mass is a fundamental attribute of matter. It is a scalar quantity, usually expressed in grams (g) or kilograms (kg) (kg).

We must first develop and balance the chemical equation for the interaction between the two chemicals in order to determine the mass of potassium hydrogen phthalate needed to react with 30mL of sodium hydroxide at 0.01M. The correct answer is:

NaKC8H4O4 + H2O = KHC8H4O4 + NaOH

One mole of KHC8H4O4 combines with one mole of NaOH to create one mole of NaKC8H4O4 and one mole of water, as shown by the equation.

The number of moles of NaOH used in the reaction may then be calculated using the supplied NaOH concentration (0.01M) and the volume of NaOH used (30mL), using the formula:

volume x concentration equals moles of NaOH.

NaOH moles= 0.01 mol/L x 0.03 L x 0.0003 mol

We know that 0.0003 moles of KHC8H4O4 are required to thoroughly react with the NaOH utilized in the process because there is a 1:1 ratio in play.

Finally, using the formula: we can utilize the molar mass of KHC8H4O4 (204.22 g/mol) to determine the mass of KHC8H4O4 required.

mass = moles X molar mass

mass = 0.0003 mol X 204.22 mol = 0.061 g

Therefore, 30mL of 0.01M sodium hydroxide requires 0.061 grams of potassium hydrogen phthalate to completely react.

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Answer:

The mass of 2 moles of water is greater than the mass of 2 moles of carbon dioxide, which is greater than the mass of 2 moles of ozone.

2 moles of water has a mass of approximately 36 grams, whereas 2 moles of carbon dioxide has a mass of approximately 44 grams, and 2 moles of ozone has a mass of approximately 48 grams.

ALLEN

Item analysis involves analyzing the performance of test items by calculating statistics such as item difficulty, item discriminability, and item discrimination. This information can be used to improve the test items, identify flawed items, and evaluate the overall quality of the test.

a. item discriminability - This refers to the ability of an item on a test to discriminate between students who have high levels of knowledge or skill in the domain being tested and those who do not.

b. mental age - This is a measure of intellectual ability that compares a person's performance on an intelligence test with the performance of typical individuals at different ages.

c. item discrimination - This is another term for item discriminability, which refers to the ability of an item on a test to discriminate between high- and low-performing students.

d. item difficulty - This refers to the level of challenge posed by an item on a test, typically measured as the proportion of students who answer the item correctly.

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--The complete question is, Dr. Marcus analyzed items on his physics test by calculating the proportion of students who got each item correct. Dr. Marcus was examining,

a. item discriminability

b. mental age

c. item discrimination

d. item difficulty--

According to the stoichiometry of the mentioned chemical equation, 17.77 g of nitrogen gas is formed.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

64 g of ammonium nitrite gives 36 g of nitrogen , thus, 32.5 g of ammonium nitrite will give 32.5 ×36/64=17.77 g.

Thus,17.77 g of nitrogen gas is formed.

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(a) tetrahedral (b) tetrahedral (c) bent or V-shaped (d) trigonal planar (e) bent or V-shaped (f) bent or V-shaped (g) linear (h) tetrahedral (i) trigonal planar

(a) The molecular structure is tetrahedral around the sulfur atom, with the four oxygen atoms forming the vertices of the tetrahedron.

(b) The molecular structure is tetrahedral around the chlorine atom, with the three oxygen atoms and hydrogen atom.

(c) The molecular structure is bent or V-shaped around the oxygen atom, with the two hydrogen atoms at the bottom of the V.

(d) The molecular structure is trigonal planar around the nitrogen atom, with the three oxygen atoms and hydrogen atom.

(e) The molecular structure is bent or V-shaped around the oxygen atom, with the hydrogen atom and nitrogen atom.

(f) The molecular structure is bent or V-shaped around the central oxygen atom, with the two other oxygen atoms at the bottom of the V.

(g) The molecular structure around each carbon atom is linear, with the two other carbon atoms forming a straight line with the carbon atom at the center.

(h) The molecular structure around the carbon atom is tetrahedral, with the two other carbon atoms and two fluorine atoms forming the vertices of the tetrahedron.

(i) The molecular structure around each carbon atom is trigonal planar, with the two other carbon atoms forming a straight line.

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--The complete question is, Describe the molecular structure around the indicated atom or atoms:

(a) the sulfur atom in sulfuric acid,

(b) the chlorine atom in chloric acid,

(c) the oxygen atom in hydrogen peroxide, HOOH

(d) the nitrogen atom in nitric acid,

(e) the oxygen atom in the OH group in nitric acid,

(f) the central oxygen atom in the ozone molecule,

(g) each of the carbon atoms in propyne,

(h) the carbon atom in Freon,

(i) each of the carbon atoms in allene--

The relationship between temperature and gas motion is a direct relationship.

The kinetic energy of gas particles is proportional to the square of their velocity, so as the temperature of a gas increases, the velocity of its particles also increases. This means that the motion of the gases becomes more energetic, causing the particles to collide more frequently and with greater force. These collisions result in an increase in pressure and volume, which are two other characteristics that are related to the temperature and motion of gases.

In summary, the relationship between temperature and the motion of gases can be explained by the kinetic theory of gases, which states that the temperature of a gas is directly proportional to the average kinetic energy of its particles. As the temperature of a gas increases, its particles move faster, resulting in more energetic collisions and changes in pressure and volume.

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Answer:

17 atoms

Explanation:

So there are two aluminum atoms, three sulfur atoms, and 12 oxygen atoms in a single unit of the compound Al2(SO4)3. This sums to 17.

An aqueous solution containing 35.5 g of an unknown molecular (non-electrolyte) compound in 158.6 g of water was found to have a freezing point of -1.4 ∘C. Therefore, 3.3 × 10² g/mol is the molecular mass.

The quantity of fill with a molecule is referred to as its molecular mass. It is also known as molecular weight.

It is computed by multiplying the mass for every atom by the amount of atoms belonging to the element that the molecule contains. Water, for example, is composed of two hydrogen atoms and one oxygen atom.

ΔT = i × Kf × m

m = ΔT / i × Kf

m = (1.4°C) / 1 × (1.86 °C/m) = 0.70 m

moles of solute = m × kg of solvent = 0.70 mol/kg × 0.1500 kg = 0.11 mol

M = 35.9 g/0.11 mol = 3.3 × 10² g/mol

Therefore,  3.3 × 10² g/mol is the molecular mass.

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Answer:

Explanation:

To find the mole fraction of silver nitrate in the solution, you need to first find the molar mass of silver nitrate and then the number of moles of silver nitrate in the solution. Here's how you can do that:

Calculate the molar mass of silver nitrate:

AgNo3 has a molar mass of 169.87 g/mol

Calculate the mass of silver nitrate in the solution:

The solution is 12.0% by mass silver nitrate, so the mass of silver nitrate in 100 mL of the solution is:

mass of AgNO3 = 100 mL * 0.12 g/mL = 12 g

Calculate the number of moles of silver nitrate:

Number of moles of AgNO3 = mass of AgNO3 / molar mass of AgNO3

Number of moles of AgNO3 = 12 g / 169.87 g/mol = 0.0703 moles

Calculate the number of moles of the solvent (water) in the solution:

Since the density of the solution is 1.11 g/mL, the mass of 100 mL of the solution is 111 g. The mass of water in the solution is:

mass of water = 111 g - 12 g = 99 g

Since the molar mass of water is 18.015 g/mol, the number of moles of water in the solution is:

number of moles of water = 99 g / 18.015 g/mol = 5.49 moles

Calculate the mole fraction of silver nitrate:

The mole fraction of silver nitrate is the ratio of the number of moles of silver nitrate to the total number of moles in the solution:

mole fraction of AgNO3 = 0.0703 moles / (0.0703 moles + 5.49 moles) = 0.0127

So, the mole fraction of silver nitrate in the solution is 0.0127.

Answer:

Mass is the independent variable, and boiling point is the dependent variable.

Answer:

792 moles.

Explanation:

When 66 moles of HNO3 are consumed, 6 x 66 = 396 moles of NO2 are produced.

Since the equation shows a 1:2 mole ratio between HNO3 and H2O, the number of moles of H2O produced is 2 x 396 = 792 moles.

The mass of ASA - Acetylsalicylic acid per tablet is 214.9 mg. The number of moles present in the tablet, is 0.001190.

For this experiment it is important to find the number of moles of ASA present in the solution. By doing this we will get the amount of ASA in the tablet also.

Students prepared a solution by hydrolyzing 0.3219 g of a crushed aspirin tablet in NaOH and then diluting with DI water in a 100-mL volumetric flask.

Number of moles = mass of ASA / molar mass of ASA

The molar mass of ASA = 180.16 g/mol

Therefore, Number of moles = 0.3219 g / 180.16 g/mol

= 0.001785 mol.

Now finding the number of moles present in the tablet,

Moles in tablet = (moles of ASA from solution) x (mass of tablet / mass of solution)

= 0.001785 mol x (0.4267 g / 0.3219 g x 1.50 mL / 50 mL)

= 0.001190 mol

Now finding the mass of ASA,

Mass of ASA per tablet = (moles of ASA in tablet) x (molar mass of ASA)

= 0.001190 mol x 180.16 g/mol

= 0.2149 g or 214.9 mg

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It will be scavenged by lysosomes and destroyed.

What is a lysosome?

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An aluminium atom will be positive if it just lost one valence electron.

Ion is an atom or group of atoms bearing an electrical charge, such as the sodium and chlorine atoms in a salt solution.

An ion is formed when an atom loses or gains electrons. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions.

According to this question, an aluminium atom is neutrally charged i.e. 0. However, when it loses an electron, it becomes positively charged.

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