1) What is the energy change when the temperature of 14.4 grams of gaseous krypton is decreased from 38.0 °C to 24.4 °C ?
Answer: ..... Joules.
2) How much energy is required to raise the temperature of 13.5 grams of gaseous xenon from 20.3 °C to 36.0 °C ?
Answer: ..... Joules.

The statement “the yeast engages in photosynthesis, which produces oxygen gas” is incorrect. Yeast cells do not engage in photosynthesis to produce oxygen gas.

Photosynthesis is the process by which green plants use sunlight, carbon dioxide, and water to produce glucose (a simple sugar), which serves as food for the plant.

Oxygen is also produced during photosynthesis.Yeast:Yeast is a unicellular fungus that converts sugar into carbon dioxide and alcohol. Yeast cells respire aerobically in the presence of oxygen and anaerobically in the absence of oxygen.

However, yeast cells do not perform photosynthesis. They do not have chloroplasts or pigments that are required for photosynthesis. Therefore, yeast cells cannot produce oxygen gas.Bio quizlet:Quizlet is an online learning platform that allows users to create and share flashcards, study guides, and quizzes.

It is a great resource for studying biology and other subjects. Students can create their own study materials or use existing ones created by other users. Quizlet provides an engaging and interactive way to learn and retain information.

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Answer:

A converter to convert from dc to ac

Explanation:

Answer:

a)Carbon (iv) oxide; CO₂

b)It is used in fire extinguishers

c) i. It is denser than air

ii. It dissolves in water to form an acidic solution

Explanation:

a) Since the compound P is composed of one atom of carbon and two atoms of oxygen, the formula of the compound is CO₂. The name of the compound is carbon(iv) oxide.

b) Carbon (iv) oxide is a gas that is of great importance to living organisms. Plants require it for photosynthesis while human produce it during the process of respiration.

Industrially, it is used in carbonated drinks. It is also used in fire extinguishers

c) The properties of Carbon (iv) oxide include the following:

i) it is an odourless colorless gas

ii) it is denser than air

iii) it dissolves in water to form a weak acidic solution, etc.

Answer:

Yes a proton affects the mass of an atom.

The 4.189g of  molecules of o2 are produced when 40.1 g of kclo3 decomposes as shown in the reaction.

What is molecule?

The number of atoms that make up a molecule might vary. Pillows, sheets, and mattress toppers are now part of Molecule's growing line of sleep essentials. To give sleepers a cool, supportive surface, the Molecule AirTEC Mattress Topper blends three layers of open-cell memory foam, AirTEC foam, and polyfoam.

What is reaction ?

A chemical reaction is the transformation of one or more chemicals, known as reactants, into one or more new compounds, known as products. The change in concentration of any of the reactants or products per unit of time can be used to determine the rate or speed of a reaction. It is determined by the equation rate=time + concentration.

Therefore, 4.189g of  molecules of o2 are produced when 40.1 g of kclo3 decomposes as shown in the reaction.

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Answer:

C. 3.2 cm

Explanation:

We need to compare the values given in different units and convert them to a common unit for comparison. The smallest unit of measurement among the given options is nanometers (nm). Therefore, we need to convert all the values to nanometers and compare them.

1 cm = 10 mm

1 mm = 1,000,000 nm

Converting the given values to nanometers:

A. 320 cm = 320 x 10 mm = 3200 mm = 3,200,000,000 nm

B. 3.2 m = 3.2 x 100 cm = 320 cm = 3,200,000,000 nm

C. 3.2 cm = 3.2 x 10 mm = 32 mm = 32,000,000 nm

D. 3.2 x 102 mm = 3.2 x 102 x 1,000,000 nm = 3,200,000,000 nm

E. 3.2 x 106 nm = 3,200,000,000 nm

Comparing the values in nanometers, we see that options C is the smallest and has the same value of 32,000,000 nm. Therefore, the answer is (C) 3.2 cm

When a reaction is in equilibrium, and the product is removed, the equilibrium shifts to the right, towards the product.

Equilibrium is a stage, when there is no change in the mass and energy of the reaction.

When more reactant added in the equilibrium stage, the equilibrium shifts toward the left, and when product added the equilibrium shifts towards the right, product.

Thus, When a reaction is in equilibrium, and the product is removed, the equilibrium shifts to the right, towards the product.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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Answer:

it's definitely a oxidation reaction because here the oxygen contained OH group present in yeild

Answer:

So it takes 80 calories of heat to melt 1 g of an ice cube, now do the math. (Hope this helped)

Explanation:

A sugar molecule can form a cyclic-hemiacetal through a reaction between its alcohol and aldehyde functional groups.

A sugar forms a cyclic-hemiacetal by reaction between an alcohol and an aldehyde.

Step 1: Identify the alcohol and aldehyde functional groups within the sugar molecule.
Step 2: The reaction occurs when the hydroxyl group (alcohol) reacts with the carbonyl group (aldehyde).
Step 3: The oxygen atom in the hydroxyl group forms a bond with the carbon atom in the aldehyde.
Step 4: A water molecule is eliminated in the process, and a cyclic-hemiacetal structure is formed.

In summary, a sugar molecule can form a cyclic-hemiacetal through a reaction between its alcohol and aldehyde functional groups.

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Answer:

The rate of dissolving of a solute in a solvent is faster when the solute and solvent are stirred, the solvent is warmer, or the solute consists of smaller particles with more surface area.

Together with the creation of H2O, a covalent bond is created between a carbon and a nitrogen atom.

When two amino acids come together, a peptide bond is created.

It entails the release of water together with the fusion of the carboxyl group of one amino acid (COOH) with the amino group of another amino acid (NH2) (H2O).

Because a carbon atom (C) and a nitrogen atom (N) share electrons, a peptide bond is a sort of covalent link (N).

Hence, along with the creation of H2O, the reaction depicted in the graphic attached also results in the development of a covalent bond between a carbon atom and a nitrogen atom.

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Answer:

B. Alpha Decay

Explanation:

Polonium's most stable isotope, polonium-209, has a half-life of 102 years. It decays into lead-205 through alpha decay.

The process through which Polonium is most likely to become stable is: B. alpha decay.

An unstable element refers to a chemical element that lose particles because its nucleus contain an excess of internal energy (neutron or proton).

This ultimately implies that, an unstable element is radioactive in nature.

In Science, some examples of an unstable element are:

Polonium is a chemical element with a large, unstable nucleus.

Basically, the most stable isotope of Polonium is Polonium-209, which typically undergoes an alpha decay to form lead-205 and the emission of an alpha particle.

⇒  \(^{209}_{84}Po\) ----> \(^{205}_{82}Pb \;+\; ^{4}_{2}\alpha\)

In conclusion, we can deduce from the above chemical equation that Polonium is most likely to become stable through an alpha decay.

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Answer:

Cadmium and Zinc

Explanation:

I just looked it up :)

Answer: Conduction, radiation and convection all play a role in moving heat between Earth's surface and the atmosphere. Since air is a poor conductor, most energy transfer by conduction occurs right near Earth's surface. ... During the day, sunlight heats the ground, which in turn heats the air directly above it via conduction.

HOPE THIS HELPS

i) The concentration of G in mol/dm3 is also 0.003416 mol/dm³.

ii) Molar mass of YOH is 204.49 g/mol

iii) The concentration of G is 0.003416 mol/dm³, the molar mass of YOH is 204.49 g/mol, and the percentage by mass of Y in YOH is 91.63%.

To solve this problem, we'll use the given information and the equation for the reaction: HCl + YOH → YCl + H2O

i. Concentration of G in mol/dm³:

From the given information, we know that 28.00 cm³ of the acid (F) neutralizes 25.00 cm³ of the base (G). This means the stoichiometric ratio between HCl and YOH is 1:1. Therefore, the number of moles of HCl neutralized by 28.00 cm³ of F is:

n(HCl) = concentration of F × volume of F in dm³

       = 0.122 mol/dm³ × 28.00 cm³ / 1000 cm3/dm³

       = 0.003416 mol

Since the stoichiometric ratio is 1:1, the concentration of G in mol/dm³ is also 0.003416 mol/dm3.

ii. Molar mass of YOH:

To calculate the molar mass of YOH, we need to know the mass of YOH used in the reaction. From the given information, we know that 7.0 g of YOH is present in 1 dm3 of G. Therefore, the molar mass of YOH can be calculated as:

Molar mass of YOH = Mass of YOH / Number of moles of YOH

                 = 7.0 g / 0.003416 mol

                 = 204.49 g/mol (rounded to two decimal places)

iii. Percentage by mass of Y in YOH:

The molar mass of Y in YOH can be calculated by subtracting the molar mass of OH from the molar mass of YOH:

Molar mass of Y = Molar mass of YOH - Molar mass of OH

              = 204.49 g/mol - 17.01 g/mol

              = 187.48 g/mol

The percentage by mass of Y in YOH can be calculated as:

Percentage by mass of Y = (Molar mass of Y / Molar mass of YOH) × 100%

                       = (187.48 g/mol / 204.49 g/mol) × 100%

                       = 91.63% (rounded to two decimal places)

Therefore, the concentration of G is 0.003416 mol/dm3, the molar mass of YOH is 204.49 g/mol, and the percentage by mass of Y in YOH is 91.63%.

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Answer:

D

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The volume of the sauce required is 529.76 mL

The volume has to do with the space that is occupied by an object. We can see that the unit that has been given for the spaghetti sauce is in the non standard unit of cups of tomato sauce. We are now asked to express this value in the metric unit of milliliter.

We have that;

1qt = 4 cups

x = 2.5 cups

x = 1qt  * 2.5 cups/4 cups

x = 0.56 qt

Also;

1q = 946 mL

0.56 qt =  0.56 qt * 946 mL/1q

= 529.76 mL

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Pure water has a vapour pressure of 23.76 torr at 25 degrees Celsius.

According to Raoult's law, a solution's vapor pressure varies in direct proportion to the amount of solvent it contains by mole.

Vapor pressure is the force that a vapor applies on the condensed phases (solid or liquid) in a closed system when they are in thermodynamic equilibrium at a particular temperature (or equilibrium vapor pressure).

It is thought that the vapor is exerting pressure on the atmosphere. In other words, the higher the vapor pressure, the faster the evaporation of a liquid.

A liquid's vapor pressure is one of its properties and depends on the strength of its intermolecular forces. Liquids have higher vapor pressure and are easier to evaporate due to weak intermolecular interactions. Lower vapor is produced by a liquid with higher intermolecular interactions.

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Answer:

The answer is Third one

Explanation:

solute is the substance being dissolved so that is the 2 tablespoons of lemonade and the 2 cups of water is the solvent.

Answer:

write acronym EFT in full

LOL... I don't think my beautiful drawing helps a ton.

But basically in a potential energy diagram, the height distance between the reactants and products is the ∆H, aka the enthalpy change.

If the reactants are higher than products, then the reaction is exothermic.

If the products are higher than reactants, then the reaction is endothermic.

Effect of Two-Step Homogenization on the Evolution of Al3Zr Dispersoids in Al-0.3Mg-0.4Si-0.2Zr Alloy Al3Zr nano-particles can be introduced in Al-Mg-Si 6xxx alloys to improve their elevated temperature behavior and recrystallization resistance. The effect of two-step homogenization treatments on

the precipitation of Al3Zr dispersoids in Al-0.3Mg-0.4Si-0.2Zr alloy was investigated and compared to

Any of a number of methods, including homogenization and homogenisation, are used to uniformly combine two liquids that are insoluble in one another. To do this, one of the liquids is changed into a state in which very minute particles are evenly dispersed across the other liquid. The process of homogenizing milk, in which the milk fat globules are equally distributed throughout the remaining milk and reduced in size, is a classic example. In order to create an emulsion, two immiscible liquids (i.e., liquids that are not soluble in all amounts one in another) must be homogenized (from "homogeneous"; Greek, homos, same + genos, kind)[2] (Mixture of two or more liquids that are generally immiscible).

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Answer:

creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes.

Explanation:

Nuclear energy produces radioactive waste

A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.

Nucleic acid blotting is widely used in recombinant DNA technology. in a southern blot, one generally hybridizes filter bound DNA with DNA probe groups of answer choices

When examining the structure of a gene, whether it is cloned or not, Southern blotting can be useful. It can be used to identify the restriction enzyme map of a gene or to look at spontaneous mutational events in a gene, including insertions, deletions, or recombination-induced rearrangements. Molecular biology and recombinant DNA technology have greatly benefited from the Southern blotting method of detecting homologous DNA sequences.

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Answer:

reproduction

Explanation:

its on study island

The addition of a solution that contains a high concentration of calcium ions (Ca2+) would cause precipitation to occur more easily in sea water than in tap water.

This is because sea water already contains a significant amount of calcium ions, and the addition of more calcium ions would cause them to react with the carbonate ions (CO32-) present in sea water to form calcium carbonate (CaCO3), which is a common type of precipitation in sea water. In tap water, the concentration of calcium ions is much lower, so the addition of a calcium solution would not cause precipitation to occur as easily as in sea water. The main salt components of seawater include Na, K, Mg2+, Ca2+, Sr2+, Cl-, SO42-, HCO3-, Br-, and F-. Precipitation occurs more easily in seawater than in tap water when a solution is added that reacts with these ions, forming insoluble compounds. One such solution is one containing carbonate ions (CO32-), which can react with Ca2+ and Mg2+ ions in seawater to form insoluble calcium carbonate (CaCO3) and magnesium carbonate (MgCO3). This reaction leads to the precipitation of these salts, which is more likely to happen in seawater due to its higher concentration of Ca2+ and Mg2+ ions compared to tap water.

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Answer:Which of the following can be formed by physically combining pure substances?a. an element c. a compound b. a mixture d. all of the above Weegy: It is true.The formula for Density is Mass divided Volume.

Explanation:

Answer:

It is B. a mixture

Explanation:

A is wrong because an element is part of a compound and can't be physically mixed, C is wrong because atm don't jin by just physically mixing then there must be a change in smething at the physical level

also correct on edg.