A "calorie" is a unit of energy, defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius. The nutritional labels on food products typically tell you how many calories of digestible energy are in one serving of food, where "digestible" means that the energy stored in the chemical bonds of the molecules comprising the food can be extracted by your body. (Water for example has energy, but that energy is not chemically accessible via digestion.) To simplify understanding for typical consumers, the "calories" reported on nutritional labels actually represent kilocalories: a 170 calorie can of beer actually contains 170,000 calories of digestible energy i)
i. If a student foolishly decides to binge drink 21 beers on their 21t birthday, how many gallons of water could they have heated from room temperature (24 °C) to boiling (100 C) using an equivalent amount of digestible energy in the beer? Recall that one gallon of water is roughly 8 pounds ii)
ii. What is this energy equivalent to in BTU? A "BTU" or British Thermal Unit is also a unit of energy, defined as the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit iii)
iii. If you had purchased an equivalent amount of electrical energy in kW-hr from the utility company, how much would you have to pay? Is this cheaper than buying beer? A kW-hr ypically costs 10 cents

Answer:

Because force is what causes things to move or change while volactiy  is when you add more energy and  the things volactiy will change.

Explanation:

The density of the substance having a mass of 2.0 g is 0.4 g/mL (Option D)

First, we shall obtain the volume of the substance. This can be obtained as follow:

Volume of substance = (Volume of water + substance) - (Volume of water)

Volume of substance = 75 - 70

Volume of substance = 5 mL

Finally, we shall determine the density of the substance. This is illustrated below:

Density = mass / volume

Density of substance = 2 / 5

Density of substance = 0.4 g/mL

Thus, the density is 0.4 g/mL (Option D)

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When H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases (option C)

A French scientist (Chatelier) postulated a principle which helps us to understand a chemical system in equilibrium.

The principle states that If a an external constraint such as change in temperature, pressure or concentration is imposed on a system in equilibrium, the equilibrium will shift so as to neutralize the effect.

According to Chatelier's principle a decrease in concentration of the products will favor the forward (right) reaction.

From the above principle, we can conclude that when H₂S gas is removed from the system at equilibrium, the reaction shifts to the right (products) and the concentration of NH₃ increases.

Thus, the correct answer to the question is option C

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The alignment of a comet's ion tail in space is primarily controlled by the interaction between the solar wind and the charged particles emitted by the comet.

This interaction is governed by the interplay of electromagnetic and gravitational forces. The resulting ion tail generally points away from the Sun, but its precise direction can be influenced by factors such as the orientation of the comet's rotation axis and the shape of its magnetic field.

1. The direction of a comet's ion tail in space is determined by the interplay of various forces. When a comet approaches the Sun, its surface heats up, causing the release of gas and dust particles from its nucleus. These particles, which are electrically charged, form the comet's coma, a glowing cloud around the nucleus.

2. As the comet moves closer to the Sun, the intense solar radiation and the high-speed stream of charged particles known as the solar wind exert forces on the charged particles in the coma. The solar wind, consisting of mostly protons and electrons, carries a magnetic field that interacts with the charged particles emitted by the comet.

3. The solar wind's magnetic field can cause the charged particles in the coma to experience a force known as the Lorentz force. This force acts perpendicular to both the direction of the magnetic field and the velocity of the charged particles. As a result, the Lorentz force causes the charged particles to curve and align their paths in a direction perpendicular to the solar wind's magnetic field.

4. The overall effect of the solar wind's interaction with the charged particles emitted by the comet is that the ion tail is pushed away from the Sun. The ion tail generally points in the direction opposite to the Sun, forming a long, glowing trail that stretches millions of kilometers into space. However, the direction of the ion tail can be influenced by other factors, such as the orientation of the comet's rotation axis and the shape of its magnetic field.

5. In conclusion, the alignment of a comet's ion tail in space is primarily determined by the interaction between the charged particles emitted by the comet and the solar wind. The resulting forces, including the Lorentz force, push the ion tail away from the Sun. While the general direction of the ion tail is away from the Sun, specific factors like the comet's rotation axis and magnetic field can influence its orientation.

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2-Cyclopenten-1-one is more basic than cyclopentanone due to the presence of a double bond in the former.

The double bond in 2-cyclopenten-1-one can act as a source of electrons, making it a better electron-donor and therefore a stronger base. On the other hand, cyclopentanone is a ketone and has a carbonyl functional group, which is a strong electron-withdrawing group and therefore makes it a weaker base. The electron-donating ability of 2-cyclopenten-1-one is further increased due to the electron-withdrawing effect of the carbonyl group being reduced in 2-cyclopenten-1-one compared to cyclopentanone. This difference in basicity between the two compounds can be used to explain the different reactivity patterns of the two compounds in various chemical reactions.

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To determine the molarity of the dichromate in the volumetric flask before it reacts with the Fe(II) in the sample, please follow these steps.

1. Identify the initial concentration and volume of the dichromate solution. This information is usually given in the problem or can be found through a series of calculations.

2. Calculate the moles of dichromate ions using the initial concentration and volume. To do this, use the formula: moles = concentration x volume.

3. Find the volume of the volumetric flask. This information is typically given in the problem or can be measured.

4. Determine the molarity of the dichromate in the volumetric flask. To do this, use the formula: molarity = moles / volume of the flask.

By following these steps, you can determine the molarity of the dichromate in the volumetric flask before it reacts with the Fe(II) in the sample.

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Answer:

metallic

Explanation:

Answer:

c

Explanation:

Answer:

Landslide

Explanation:

its most destructive because its various rocks falling and it goes blammow

Answer: the answer is C

Landslide

Explanation:

What's the effect of surface area change

We know

Pressure is indirectly proportional to area

Answer: The mass density is 1166.36 \(kg/m^{3}\).

Explanation:

Given: Weight of sample in air \((F_{air})\) = 500 N

Weight of sample in alcohol \((F_{alc})\) = 200 N

Specific gravity = 0.7 = \(0.7 \times 1000 = 700 kg/m^{3}\)

Formula used to calculate Buoyant force is as follows.

\(F_{B} = F_{air} - F_{alc}\\= 500 - 200 \\= 300 N\)

Hence, volume of the material is calculated as follows.

\(V = \frac{F_{B}}{\rho \times g}\)

where,

\(F_{B}\) = Buoyant force

\(\rho\) = specific gravity

g = acceleration due to gravity = 9.81

Substitute the values into above formula.

\(V = \frac{F_{B}}{\rho \times g}\\= \frac{300}{700 \times 9.81}\\= \frac{300}{6867}\\= 0.0437 m^{3}\)

Now, mass of the material is calculated as follows.

\(mass = \frac{F_{air}}{g}\\= \frac{500 N}{9.81}\\= 50.97 kg\)

Therefore, density of the material or mass density is as follows.

\(Density = \frac{mass}{volume}\\= \frac{50.97 kg}{0.0437 m^{3}}\\= 1166.36 kg/m^{3}\)

Thus, we can conclude that the mass density is 1166.36 \(kg/m^{3}\).

C. Chemical properties always change depending on temperature or pressure.

Physical Change v/s Chemical Change:

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The activation of the serine/threonine protein kinase akt requires phosphoinositide 3-kinase (pi 3-kinase) to create phosphorylated lipids that serve as docking sites that localize Akt to the plasma membrane.

Ak strain changing is the meaning of the word Akt. The term "Akt" first appeared in 1928, when J. Furth conducted research on mice that spontaneously generated thymic lymphomas.

An essential enzyme in the signaling pathway that controls how cells react to insulin as well as other growth stimuli is called phosphoinositide 3-kinase (PI3K). To create phosphatidyl-inositol-3,4,5-trisphosphate (PIP3) at the plasma membrane, one such enzyme phosphorylates phosphatidylinositol-4,5-bisphosphate in the third carbon in the molecule.

Therefore, The activation of the serine/threonine protein kinase akt requires phosphoinositide 3-kinase (pi 3-kinase) to create phosphorylated lipids that serve as docking sites that localize Akt to the plasma membrane.

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Triacylglycerols are the major form of stored energy instead of glucose because they have a higher energy density due to their hydrophobic nature, they can be easily transported in the blood serum, and they yield more energy per carbon upon oxidation compared to glucose.

Triacylglycerols are more advantageous as a stored energy form compared to glucose for multiple reasons. Firstly, triacylglycerols have a higher energy density because of their hydrophobic nature. They are not solvated by water and therefore have less mass per unit volume, allowing for more energy to be stored in the same volume.

Secondly, triacylglycerols are highly soluble in blood serum, enabling efficient transportation to different parts of the body where energy is needed. This solubility facilitates the mobilization and delivery of stored energy to meet metabolic demands.

Lastly, the fatty acids in triacylglycerols are at a higher reduction state compared to glucose. This higher reduction state means that fatty acids yield more energy per carbon upon oxidation. Thus, the oxidation of fatty acids in triacylglycerols provides a greater amount of energy compared to the oxidation of glucose, making them an efficient energy source for the body.

Overall, the combination of higher energy density, easy transportability, and greater energy yield per carbon make triacylglycerols the preferred form of stored energy in the body compared to glucose.

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The mass of NaHCO₃ needed to produce 2.659 moles of CO₂ is 446.712 g

We'll begin by writing the balanced equation for the reaction. This can be obtained as follow:

2NaHCO₃ —> Na₂CO₃ + CO₂ + H₂O

Molar mass of NaHCO₃ = 23 + 1 + 12 + (16×3)

= 84 g/mol

Mass of NaHCO₃ from the balanced equation = 2 × 84 = 168 g

From the balanced equation above,

168 g of NaHCO₃ decomposed to produce 1 mole of CO₂.

With the above information, we can obtain the mass of NaHCO₃ needed to produce 2.659 moles of CO₂. This can be obtained as follow:

From the balanced equation above,

168 g of NaHCO₃ decomposed to produce 1 mole of CO₂.

Therefore,

Xg of NaHCO₃ will decompose to produce 2.659 moles of CO₂ i.e

Xg of NaHCO₃ = 168 × 2.659

Xg of NaHCO₃ = 446.712 g

Thus, 446.712 g of NaHCO₃ is needed to produce 2.659 moles of CO₂.

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Proteins contain blank atoms, which are not found in oxygen. Option(c)

Proteins are complex biomolecules composed of chains of amino acids. These amino acids, in turn, consist of atoms such as carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), along with smaller amounts of other elements like sulfur (S) and phosphorus (P) in some cases.  Oxygen is a vital component of many biological molecules, including water and carbohydrates, but it is not directly incorporated into the amino acid structure that makes up proteins. Proteins are primarily composed of carbon, hydrogen, nitrogen, and sometimes sulfur. These atoms combine to form the backbone and side chains of amino acids, which link together through peptide bonds to create the protein structure. While oxygen atoms are absent from the amino acid structure, they play a crucial role in the functioning of proteins. Oxygen is involved in various processes such as respiration and metabolism, where proteins facilitate the transport and utilization of oxygen within living organisms. Oxygen can bind to specific sites in proteins, enabling them to carry out their functions effectively. Proteins do not contain oxygen atoms in their amino acid structure, but oxygen is essential for their overall function within biological systems. Option(c)

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Answer:

Total of 4 isomers of hepta-2,4-diene are given

Explanation:

pls mark brainliest

hope this helps  <3

The continents previously comprised a single landmass when they drifted apart, as according Wegener's Atomic Hypothesis. Pangaea existed, according to Wegener, some 300,000 years ago.

The Pangea, Gondwana, or Pannotia supercontinents were the most recent. Geologists believe that there were formerly three supercontinents: Nuna (also known as Columbia), Rodinia, or Ur. A single landmass which encompasses at least 75% of the world's territory is referred to be a supercontinent.

A landmass thought up almost most or all of the land on Earth is known as a supercontinent. This term could be used to the landmass that is made up of modern-day Africa and Eurasia. Pangea was the most ancient supercontinent to include all of Earth's significant—and possibly most well-known—landmasses.

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There are four methylene groups in 2,4-dimethylhexane. The correct answer is (c) 4.

In 2,4-dimethylhexane, the name itself provides information about the number and position of the methyl groups.

The compound has a total of six carbon atoms in its carbon chain. The "hexane" part of the name indicates that it is a six-carbon chain.

The "2,4-dimethyl" part of the name indicates that there are two methyl groups attached to the carbon chain at positions 2 and 4.

Since each methyl group contains one carbon atom, the number of methylene groups (CH₂) can be determined by subtracting the number of methyl groups (CH₃) from the total number of carbons in the chain.

In this case, there are two methyl groups (2 CH₃), so the number of methylene groups is:

Total carbons - Number of methyl groups = 6 - 2 = 4

Therefore, there are four methylene groups in 2,4-dimethylhexane.

The correct answer is (c) 4.

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The correct option is D), Material Safety Data Sheet (MSDS)

The proper handling procedures for substances such as chemical solvents are typically outlined in the Material Safety Data Sheet (MSDS). MSDS is a comprehensive document prepared and provided by the manufacturer or supplier of hazardous chemicals to inform employees and the public about the properties of the chemicals, the associated hazards, and the safety measures necessary for their use, handling, storage, and transport. It contains information on the chemical's physical and chemical properties, health hazards, reactivity, environmental hazards, protective equipment, safe handling practices, and emergency procedures. The MSDS is a critical component of an organization's chemical management program as it helps reduce the risk of accidents, incidents, and injuries from exposure to hazardous chemicals. The information in the MSDS is presented in a standardized format to ensure consistency in the presentation of information across different products and manufacturers. The MSDS should be readily available to workers who use or handle hazardous chemicals, and it should be reviewed and updated regularly to reflect any changes in the properties or hazards of the chemical.

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Answer:

C Atomic number

Explanation:

The question is typo it should be 19 is the____ of pottasium. The atomic number is the number on top

Energy required to heat 40.7g of water from -10 degree C to 70 degree C is 26341.04J.

Specific heat of ice = 2.06 J g-1 degree C-1

Specific heat of water = 4.18 J g-1 degree C-1

Energy required to convert ice from -10 degree C to 0 degree C,

Q1 = m . cice . DT = 40.7 x 2.06 x [ 0 – (-10)] = 40.7 x 2.06 x 10

Q1 = 838.42J

Energy required to convert ice into water at 0 degree C,

Q2 = m . DHfus  = 40.7 x 334 = 13593.8J

Energy required to heat water from 0 degree C to 70 degree C,

Q3 = m . cwater . DT = 40.7 x 4.18 x [70 – 0] = 40.7 x 4.18 x 70

Q3 = 11908.82J

Total energy required = Q1 + Q2 + Q3 = 26341.04J

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It would take 1,127.7 kJ of thermal energy to change 500g of water from liquid phase to vapor phase at a constant temperature and pressure, assuming the theoretical heat of vaporization of water.

To calculate the amount of thermal energy required to change 500g of water from liquid phase to vapor phase, we need to use the heat of vaporization (also called enthalpy of vaporization) of water, which is the amount of energy required to convert one mole of liquid water to water vapor at a constant temperature and pressure.

The heat of vaporization of water is given as 40.65 kJ/mol. To calculate the energy required to vaporize 500g of water, we need to first calculate the number of moles of water present in 500g of water:

Number of moles of water = mass of water / molar mass of water

Number of moles of water = 500g / 18.02 g/mol

Number of moles of water = 27.74 mol

Now, we can use the following formula to calculate the amount of thermal energy required:

Energy = Number of moles x Heat of vaporization

Energy = 27.74 mol x 40.65 kJ/mol

Energy = 1,127.7 kJ

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The specific heat capacity of the pan in the calorimeter During your investigation, you perform an experiment, you place 2.0 kg of water at 25.0°C in a calorimeter, heat your 3.0 kg pan to 300.0 °C is 0.449 kJ/kg°C.

We must first figure out how much heat the water has absorbed. The heat released by the pan must then be determined using the energy conservation concept.

Utilizing the formula:

Q = m * c * ΔT

There are:

(Mass of water) m = 2.0 kg

Water has a specific heat capacity of 4.18 kJ/kg°C.

ΔT = (63.2°C - 25.0°C) = 38.2°C

Q=2.0 kg*4.18 kJ/kg°C*38.2°C = 319.22 kJ

The heat released by the pan must then be determined using the energy conservation concept. It is safe to presume that the water and the calorimeter have absorbed all of the heat that the pan has released. Q is a formula that can be used.

Q = m * c * ΔT

There are:

m = 3.0 kg (the pan's mass).

In terms of the pan's specific heat capacity, c =?

ΔT = (300.0°C - 63.2°C) = 236.8°C

Q = 319.22 kJ

Inputting the values results in:

319.22 kJ = (3.0 kg) * c * (236.8°C)

To solve for c, we obtain:

3.0 kg times 236.8°C times 319.22 kJ equals 0.449 kJ/kg°C.

In this instance, the pan is most likely composed of cast iron.

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Answer:

3Hg(OH)2 + 2H3PO4 → Hg3(PO4)2 + 6H2O

Answer:

It will produce 44 grams of carbon dioxide

Explanation:

Step 1: Data given

MAss of CaCO3 = 100 grams

Molar mass of CaCO3 = 100.09 g/mol

Mass of CaO produced = 56 grams

Molar mass of CaO = 56.08 g/mol

Step 2: The balanced equation

CaCO3 → CaO + CO2

Step 3: Calculate moles CaCO3

Moles CaCO3 = mass CaCO3 / molar mass CaCO3

Moles CaCO3 = 100 grams / 100.09 g/mol

Moles CaCO3 = 1.00 moles

Step 4: Calculate moles CaO

Moles CaO = 56 grams / 56.08 g/mol

Moles CaO = 1.00 moles

Step 5: Calculate moles CO2

For 1 mol CaCO3 we'll have 1 mol 1 mol CaO and 1 mol CO2

Step 6: Calculate mass CO2

Mass CO2 = moles CO2 * molar mass CO2

Mass CO2 = 1.00 moles * 44.0 g/mol

Mass CO2 = 44 grams

It will produce 44 grams of carbon dioxide

Answer:

296,875,000 mol

Explanation:

1mol of SO2 is 64g

1.9×10⁷ kg ----> 1.9×10¹⁰g

1mol ----> 64g

x -----> 1.9×10¹⁰g

x= 1.9×10¹⁰/64 mols

= 296,875,000 mol