why is it important that the same thermometer be kept in the calorimeter for the entire experiment? 2. judging from the results, is radiant heat loss a significant factor? 3. how would the computed value of specific heat be affected if some boiling water were carried over to the calorimeter with the metal sample?

According to the excerpt, the executive office in Texas that is appointed is D. secretary of state

This refers to the storytelling that is done with the aid of a narrator in order to show the sequence of events that takes place in a step by step manner for a better understanding.

Hence, it can be seen from Article 4 of the Texas Constitution, there is the narration of the different offices that are in use and the executive officers and the ones that are elected, but the appointed official is the Secretary of State.

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Answer:

D, it says it will be appointed by the governor

Explanation: bc i did test

Answer:

The mass of 1 atom of silver is 1.79 x 10-22g.

Enantiomers are: E) non-superposable molecules that are mirror images of each other.

In Science, stereoisomerism is sometimes referred to as spatial isomerism and it can be defined as a form of isomerism in which chemical species of molecules have the same molecular formula, but differ in how their atoms are positioned (arranged) in three-dimensional orientations of space.

This ultimately implies that, stereoisomerism occurs when two molecules are composed of the same atoms that are connected in the same sequence but these atoms are positioned (arranged) differently in space.

Based on scientific records, enantiomers are mirror images of one another and cannot be aligned in space to be identical because they are non-superposable molecules.

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Answer:

6.44 cups of ice

Explanation:

The ratio of the densities is simply the density of one divided by the density of the other: The density of ice to water is 0.92. Using the ratio, one can simply multiply the volume of the ice by 0.92, which is the conversion factor for the volume of ice to liquid water.

7 × 0.92 = 6.44

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If you have 25 ml of a buffer solution at an initial ph, and it takes 13 ml of 0.1m hcl to change the buffer to ph -1, 130 ml/M is the buffer capacity for this solution.

The buffer capacity of a solution is a measure of its ability to resist changes in pH when small amounts of acid or base are added. It is defined as the amount of acid or base that must be added to the solution to change its pH by one unit.

To find the buffer capacity of a solution, we need to know the initial pH of the solution and the amount of acid or base required to change its pH by one unit.

In this case, we are given that the initial pH of the buffer solution is some value, and it takes 13 mL of 0.1 M HCl to change the pH by 1 unit. We can use this information to calculate the buffer capacity as follows:

Buffer capacity = amount of acid or base required to change pH by 1 unit / concentration of acid or base

= 13 mL / 0.1 M

= 130 mL/M

Therefore, the buffer capacity of this solution is 130 mL/M.

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Answer:

First, we need to determine the limiting reactant in the reaction. We can do this by calculating the amount of CO2 that would be produced by each reactant and comparing them.

For C2H6:

Molar mass of C2H6 = 2(12.01 g/mol) + 6(1.01 g/mol) = 30.07 g/mol

Moles of C2H6 = 18.6 g / 30.07 g/mol = 0.619 mol

Moles of CO2 produced = 4 mol CO2 / 2 mol C2H6 * 0.619 mol C2H6 = 1.238 mol CO2

Mass of CO2 produced = 1.238 mol CO2 * 44.01 g/mol = 54.4 g

For O2:

Molar mass of O2 = 2(16.00 g/mol) = 32.00 g/mol

Moles of O2 = 69.2 g / 32.00 g/mol = 2.1625 mol

Moles of CO2 produced = 7 mol CO2 / 2 mol O2 * 2.1625 mol O2 = 7.5708 mol CO2

Mass of CO2 produced = 7.5708 mol CO2 * 44.01 g/mol = 333.5 g

Since the amount of CO2 produced by C2H6 is less than the amount produced by O2, C2H6 is the limiting reactant. Therefore, we can use the amount of C2H6 to determine the amount of H2O produced.

Moles of H2O produced = 6 mol H2O / 2 mol C2H6 * 0.619 mol C2H6 = 1.857 mol H2O

Mass of H2O produced = 1.857 mol H2O * 18.02 g/mol = 33.5 g

Therefore, 33.5 g of steam (H2O) is produced in the combustion reaction.

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Answer:

0.25L or 250Ml

Explanation:

I am not that good but as far as my calculations this must be the answer

Answer:

False.

Explanation:

The molecules are tightly packed together in solids, I'm pretty sure the matter with the most molecular freedom is a gas.

The structure of 3,4-dimethylfuran contains three sp2-hybridized carbons and one sp3-hybridized carbon. The carbon-13 NMR spectrum for 3,4-dimethylfuran would consist of four peaks. The peak at δ = 56.6 ppm would correspond to the sp3-hybridized carbon, while the other three peaks at δ = 48.5 ppm, 24.1 ppm and 7.5 ppm would correspond to the sp2-hybridized carbons.

The sp3-hybridized carbon, located at the end of the alkyl side chain, would be the most deshielded peak and would appear at a higher chemical shift than the other three sp2-hybridized carbons. The three sp2-hybridized carbons in the three-membered ring would be equally shielded and would appear at similar chemical shifts. The peak located at the highest chemical shift (δ = 48.5 ppm) would be the carbon connected to two hydrogen atoms.

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Carbocyclic compounds are compounds that have form a carbon atom rings.

Carbocyclic compounds e.g. aromatic or non-aromatic cyclic carbon compounds are those compound that have a carbon ring attached or enclosed to them. A good example of organic compound freely occurring in nature are of this form. The main parent of these compounds are either benzene of cyclohexane or cyclohexene.

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The term used to describe a naturally occurring concentration of one or more metallic minerals that can be extracted economically is called an ore deposit.

An ore deposit refers to a natural concentration of a metallic mineral that can be extracted for profit. It is one of the most significant geological resources since it allows mining organizations to extract valuable metals and minerals to meet the demand for everyday goods and services.

Some examples of metal ores are iron, lead, zinc, gold, silver, copper, etc. Ore deposits are categorized into two groups: hydrothermal and sedimentary. Sedimentary deposits are generally less profitable than hydrothermal deposits since they have fewer ores that are widely dispersed. Hydrothermal deposits are formed by hot water or steam coming into contact with rock and depositing minerals. They contain most of the valuable metallic minerals we mine.

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Answer:

Genotypes are the genetic composition of an organism. Phenotype is the physical composition of an organism.

Explanation:

Answer:

The genotype is the genetic characteristics of an organism

the phenotype is the physical characteristics of an organism

Reactive nitrogen refers to nitrogen compounds that are chemically active and can participate in various biological and environmental processes, while non-reactive nitrogen refers to nitrogen in unreactive forms, such as molecular nitrogen (N2) or nitrogen gas.

Reactive nitrogen refers to nitrogen compounds that are chemically active and can undergo transformations or participate in various biological and environmental processes. These compounds include ammonia (NH3), nitrate (NO3-), nitrite (NO2-), and organic nitrogen compounds. Reactive nitrogen is involved in essential processes such as nitrogen fixation, nitrification, denitrification, and nitrogen assimilation in living organisms. It plays a vital role in the nitrogen cycle and can have both positive and negative impacts on ecosystems and the environment, depending on the context.

Non-reactive nitrogen, on the other hand, refers to nitrogen in its unreactive forms, primarily as molecular nitrogen (N2) or nitrogen gas. Molecular nitrogen is chemically stable and relatively inert, meaning it does not readily participate in chemical reactions or biological processes. Non-reactive nitrogen is often considered biologically unavailable until it undergoes nitrogen fixation, a process where certain microorganisms convert N2 into reactive forms that can be used by organisms. In summary, reactive nitrogen compounds are chemically active and participate in various processes, while non-reactive nitrogen exists in its unreactive forms, primarily as molecular nitrogen, and requires conversion to reactive forms to be utilized by living organisms.

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At this point, helium is exerting 1270 torr of pressure against its container.

Boyle's Law, a cornerstone of chemistry, describes the behavior of a gas sustained at a constant temperature. Robert A. Boyle discovered this law in 1662: at a certain temperature, the volume of a gas is inversely proportional to the pressure it exerts. To put it another way, if a gas is driven into a closed place, it will condense to fit the area but raise the pressure on the container.

Boyle's law, which is arguably a clearer way to put it, is the relationship between pressure and volume. Mathematically, Boyle's law can be written as pV=k, where p stands for the pressure, volume, and mass of the gas and k is a constant.

The solution is straightforward when temperature and moles are constant,

P₁V₁ = P₂V₂

Given,

P₁ = 760 torr

P₂ = ?

V₁ = 5.00 I

V₂ = 3.00 I

(760)(5.00) = (3.00)(P₂),

P2 = 1270 torr.

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The component depicted in the red box would be the reactants in the chemical equation 2 H2 + O2.  In this instance, the reactants are hydrogen gas (H2) and oxygen gas (O2).

A substance or molecule that takes part in a chemical reaction is known as a reactant. During the reaction, the initial substance experiences a chemical change. In the process, reactants are consumed and changed into products.

A chemical reaction is the process by which one or more chemicals, referred to as reactants, change to create one or more new compounds, referred to as products. The bonds between atoms are broken and rearranged during a chemical reaction, creating new compounds with various chemical characteristics. Atoms are neither generated nor destroyed during a chemical reaction, and the total mass and energy remain constant.

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The statement "Syrah, Shiraz, and Petite Syrah are related because they are essentially the same varietal" is False. Syrah, Shiraz, and Petite Syrah are not the same varietal, but they are related to each other. The varietal known as Syrah is an Old World grape that is grown in France's Rhône Valley.

The statement "Syrah, Shiraz, and Petite Syrah are related because they are essentially the same varietal" is False. Syrah, Shiraz, and Petite Syrah are not the same varietal, but they are related to each other. The varietal known as Syrah is an Old World grape that is grown in France's Rhône Valley. Shiraz, on the other hand, is a New World grape that is grown primarily in Australia, but also in other parts of the world, including South Africa, New Zealand, and the United States. Both Syrah and Shiraz produce full-bodied wines that are known for their deep color, spicy notes, and high tannin content.

However, Shiraz wines tend to be fruitier and more jammy than Syrah wines. Petite Sirah is another grape varietal that is related to both Syrah and Shiraz. Petite Sirah is a cross between Syrah and Pelours in, another grape varietal that is grown in France. Petite Sirah is grown primarily in California and produces wines that are known for their dark color, high tannin content, and bold, jammy flavors. So while Syrah, Shiraz, and Petite Sirah are related to each other, they are not the same varietal.

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Answer:

2 C3H6 + 9 O2  6 H2O + 6 CO2

Theo. yield is 440.0 g CO2, % yield = 45.45% Explanation: hope it helps here for ur service

439.16 g of carbon dioxide is produced by complete combustion of 140 g of propene. The percent yield is 45.54%.

Combustion is defined as a high temperature exothermic reaction between a fuel which acts as a reductant and an oxidant which is usually atmospheric oxygen.It does not result in fire as the flame is visible only when substance which undergoes combustion vaporizes.

For combustion reactions to take place stoichiometry is followed according to which mass of reactants or products obtained or required is calculated.

2 C₃H₆ + 9 O₂  \(\rightarrow\) 6 CO₂ + 6 H₂O

Here 2 molecules of propene react to give 6 molecules of carbon dioxide.

∴ for 140 grams of propene 140×264/84.16=439.16 g of molecules of CO₂ are produced.

Percent yield is calculated by dividing observed yield by theoretical yield which gives 45.54% according to this example.

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Answer:

Explanation:

To obtain pure crystals of iron sulfate from a mixture of copper carbonate and iron sulfate, you can use the process of filtration and crystallization. Here are the steps to follow:

Dissolve the mixture of copper carbonate and iron sulfate in water to form a solution.

Add dilute sulfuric acid to the solution, which will react with copper carbonate to form copper sulfate, carbon dioxide, and water. The iron sulfate will remain in the solution.

CuCO3 + H2SO4 -> CuSO4 + CO2 + H2O

Filter the solution to separate the solid copper sulfate from the iron sulfate solution.

Heat the iron sulfate solution to evaporate the water, leaving behind a concentrated solution of iron sulfate.

Allow the concentrated solution to cool slowly to room temperature to allow crystals of pure iron sulfate to form.

Filter the crystalized iron sulfate to separate it from any remaining solution.

Wash the crystals with distilled water to remove any impurities and allow them to dry.

By following these steps, you can obtain pure crystals of iron sulfate from a mixture of copper carbonate and iron sulfate.

Answer:

Global warming is expected to cause changes in the amount of cloud cover, and the height and thickness of these clouds in the future, shifting the balance between the parasol and blanket effects of clouds. The knock-on effect this will have on temperature is known as cloud feedback

Explanation:

Global warming is expected to cause changes in the amount of cloud cover, and the height and thickness of these clouds in the future, shifting the balance between the parasol and blanket effects of clouds. The knock-on effect this will have on temperature is known as cloud feedback

The orbital distance of Venus from the Sun is approximately 107,476,259.24 kilometers.

To find out the distance of an orbit, such as the orbital distance of Venus, in kilometers given its distance in Astronomical Units (AU), we will use the conversion factor where 1 AU is equivalent to 149,597,870.7 kilometers. This conversion factor helps us find out the value of any Astronomical Unit measurement in kilometers.

Therefore, the orbital distance of Venus in kilometers can be found by multiplying its distance in AU by the conversion factor of 149,597,870.7 km/AU. So, the long answer to this question is:Orbital distance of Venus = 0.72 AUConversion factor: 1 AU = 149,597,870.7 kmc Therefore, distance of Venus from the sun = 0.72 AU x 149,597,870.7 km/AU= 107,476,259.24 km

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A mixture is prepared by dissolving 2 g of kcl in 100 g of o. in this mixture, o is the solvent.

A solute can be dissolved by a solvent, which creates a solution. In addition to being a liquid, a supercritical fluid, a solid, or maybe even a gas could also be a solvent.

Solvents come in two varieties: organic solvents as well as inorganic solvents. Water and ammonia seem to be examples of inorganic solvents, while alcohols and glycol ethers are examples of organic solvents. Inorganic solvents includes those that do not contain carbon, including such water and ammonia.

Therefore, a mixture is prepared by dissolving 2 g of kcl in 100 g of o. in this mixture, o is the solvent.

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Answer:

I hope this helps

Explanation:

Answer:

4 liters of the 70% solution are required by the chemist.

8 liters of saline solution divided by 25%

Saline solution at 25% = 0.25 x 8 = 2 liters

Let there be x liters of saline solution at 70%.

Salt = 8 plus x

40% of salt is equal to 25% of saline solution plus 70% of saline solution.

2 + (70/100)x = (40/100)(8 + x)

2 + 0.7x = 0.4(8 + x)

2 + 0.7x = 3.2 + 0.4x

0.7x - 0.4x = 3.2 - 20.3

x = 1.2

x = 1.2 / 0.3

x = 4

4 liters of the 70% solution are required by the chemist.

The following equation can be used to determine the volume or concentration of a concentrated or diluted solution: M1V1 = M2V2.

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Answer:

Cornea

Lens

Retina

Explanation:

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The complete sentences are:

Page 3:

The effect of energy in phase transitions of matter is that it is required to break the intermolecular forces that hold the particles of a substance together. When energy is added to a substance, the particles move faster and the intermolecular forces are broken. This can cause the substance to change phase.

The interactive demonstration on the sample of water shows that energy is required to melt ice and boil water. When the ice is heated, the particles start to move faster and the ice melts. The temperature of the water stays constant at 0°C until all of the ice has melted. This is because the energy is being used to break the intermolecular forces in the ice. Once all of the ice has melted, the temperature of the water starts to rise again. When the water is boiled, the particles move so fast that they escape from the liquid state and become a gas. The temperature of the water stays constant at 100°C until all of the water has boiled. This is because the energy is being used to break the intermolecular forces in the water. Once all of the water has boiled, the temperature of the steam starts to rise again.

The complete sentences:

Page 4:

Heating curves show the temperature of a substance as it is heated. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Cooling curves show the temperature of a substance as it is cooled. The curve has a horizontal line at the melting and boiling points, which indicates that the temperature does not change during these phase changes.

Both curves show that the temperature of a substance increases as it is heated and decreases as it is cooled.

A heating curve is more choppy than a cooling curve because there are more phase changes during heating than during cooling.

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The statements that describe how the pond turned into the bog is as follows: Large water plants grew in shallow water around the edge of the pond.

Pond is an inland body of standing water, either natural or man-made, that is smaller than a lake.

A bog is an area of decayed vegetation (particularly sphagnum moss) which forms a wet spongy ground too soft for walking.

This means that a pond can become a bog when existing plants in the pond decays until the land becomes soft.

Therefore, the statements that describe how the pond turned into the bog is as follows: Large water plants grew in shallow water around the edge of the pond.

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