3. Pure sucrose has a melting point of 458 K. If a sample of sucrose is subjected to a temperature of 500. °F, will
sucrose be in the solid state or the liquid state?

Answer:

it pops because the heat and water inside of it

Explanation:

Answer:

when the corn is heated, the water turns into steam, which builds pressure inside the kernel. When it can no longer contain the pressure it pops.

Explanation:

There are numerous ways to determine whether lead is present in an ore. Atomic absorption spectroscopy is a popular approach. With this method, an ore sample is dissolved in acid and then atomized in a flame or plasma.

The sample's atoms will absorb light at particular wavelengths that are peculiar to the element under investigation. The amount of light absorbed can be used to calculate how much lead is present in the sample. Inductively coupled plasma mass spectrometry and X-ray fluorescence spectroscopy are further techniques. It is crucial to remember that these procedures call for specialized tools and training, thus they ought to only be carried out in a lab by qualified experts.

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Answer:

I think its 2 C8H18 + 25 O2 = 18 H2O + 16 CO2

Im not sure!

Explanation:

Answer:

conserved or created/destroyed. We can say that throughout the reaction mass is conserved.

For a chemical reaction in a closed system, mass Connot  be  or destroyed . We can say that throughout the reaction mass is conserved .

During a chemical reaction, atoms are rearranged and bonded together in new combinations, forming different substances. However, the total number of atoms remains the same. This means that the total mass of the reactants must be equal to the total mass of the products.

The law of conservation of mass is based on the principle that atoms are neither created nor destroyed during a chemical reaction. Instead, they are rearranged and redistributed into different chemical species.

It is important to note that while mass is conserved, the substances involved in the reaction may undergo changes in physical state (solid, liquid, gas) or experience changes in energy, such as the release or absorption of heat. These changes do not affect the total mass of the system.

In summary, for a chemical reaction in a closed system, mass cannot be created or destroyed. The law of conservation of mass states that the total mass of the reactants is equal to the total mass of the products, and throughout the reaction, mass is conserved.

This principle is a fundamental concept in chemistry and plays a crucial role in understanding and balancing chemical equations.

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The difference about the presence of water on Earth that sets it apart from the other inner planets is that either the planet is too hot that the water vaporizes or too cold that the water freezes.

The primary components of inner planets, commonly referred to as terrestrial planets, are rocks and metals. In comparison to the outer planets, they are modest in both size and shape. They have a molten metal core and a solid surface. The Solar System's four innermost planets are as follows (Mercury, Venus, Earth, and Mars).

Most importantly, since the temperature permits liquid water to exist for long periods of time, Earth is unique in that the majority of our planet is covered with liquid water.

Only the Earth possesses liquid water because all the other planets and moons are either too hot or too cold, causing any water that may be present to boil away or freeze.

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The average atomic mass of element XX is 55.8452 amu (to four significant figures).

Here's an illustration: Water molecules have the chemical formula H2O, which indicates that they are made up of two hydrogen (H) atoms and one oxygen (O) atom. The average atomic mass of hydrogen is 1.00794 amu. The average mass of oxygen atoms is 15.9994 amu.

average atomic mass = (fractional abundance isotope 1 x mass isotope 1) + (fractional abundance isotope 2 x mass isotope 2) + ... + (fractional abundance isotope n x mass isotope n)

where n is the number of isotopes.

Substituting the given values, we get:

average atomic mass = (0.05845 x 53.93961 amu) + (0.9175 x 55.93494 amu) + (0.02123 x 56.93539 amu) + (0.00282 x 57.93328 amu)

average atomic mass = 55.8452 amu

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Answer:

This description shows a methyl group.

Explanation:

There are 3.44 x 10^{22} particles in 0.057 moles of lithium bromide.

The lithium bromide formula also known as the lithium monobromide formula or Bromo lithium formula is explored. It is a counterion bromide-based salt of lithium.

we have to use Avogadro's constant,

Avogadro's constant, is approximately equal to 6.022 x 10^{22} particles per mole.

we can use the following formula:

number of particles = moles x Avogadro's constant

Substitute the values,

number of particles = 0.057 moles x 6.022 x 10^{23} particles/mol

Simplifying the equation

number of particles = 3.44 x 10^{22} particles

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Answer:

Co(NO3)2 isthe right answer

Explanation:

hope it helped u a lot

The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.

This equation shows that n moles of CO₂ are created for every 1 mole of oxygen that is consumed. To convert to grams, we must first compute how many moles of O₂ are produced from 8.5 g of O2, then use that amount to establish how many moles of CO₂ are generated.

One carbon atom contributes 12.01 g/mol to carbon dioxide (CO₂), while the two oxygen atoms together contribute (2)(16.00) = 32.00 g/mol.

022 10 23 molecular units 8 grams of oxygen gas have = 8 32 6. 022 10 23 = 1. 5 10 23 molecules in it. Thus, 1 will be the appropriate response to be entered in the blank.

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Answer:

A is correct answer for your question. A

Explanation:

A P E X

The purpose of the flame that is lit below a hot air balloon is to Increase Enthalpy. Hence, Option (A) is Correct.

A thermodynamic quantity equivalent to the total heat content of a system. It is equal to the internal energy of the system plus the product of pressure and volume.

A hot air balloon uses a burner to heat up the air inside the balloon. The burner is usually fueled by liquid propane. The burner mixes the fuel with air and ignites the mixture, which creates a flame directly underneath the bottom opening of the hot air balloon.  

Once the air inside the balloon begins to get warm, the balloon will rise. The pilot controls the balloon’s altitude by releasing hot air from a vent at the top of the balloon, releasing the warmer air causes the balloon to descend.

Therefore, The purpose of the flame that is lit below a hot air balloon is to Increase Enthalpy. Hence, Option (A) is Correct.

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A. The patch's area in square kilometers (km²) is 1.61×10⁻⁹ km²

B. The cost of the patch to the nearest cent is 734 cents

We can convert 16.1 cm² to km² as illustrated below:

Conversion scale

1 cm² = 1×10⁻¹⁰ km²

Therefore,

16.1 cm² = 16.1 × 1×10⁻¹⁰

16.1 cm² = 1.61×10⁻⁹ km²

Thus, 16.1 cm² is equivalent to 1.61×10⁻⁹ km²

We'll begin by converting 16.1 cm² to in². This can be obtained as illustrated below:

1 cm² = 0.155 in²

Therefore,

16.1 cm² = 16.1 × 0.155

16.1 cm² = 2.4955 in²

Finally, we shall the determine the cost in centas fo r llow:

1 in² = 294 cent

Therefore,

2.4955 in² = 2.4955 × 294

2.4955 in² = 734 cents

Thus, the cost of the patch is 734 cents

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The conjugate base of CO3-2 is hydrogen carbonate.

A conjugate base can be defined as a base that can be derived from another base by the reason of it loosing or gaining an electron.

Conjugate base are very similar because they both posses the same elements.

In conclusion, The conjugate base of CO3-2 is hydrogen carbonate.

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The statement "when a bottle of soda was opened, bubbles rapidly appeared in the liquid and were given off at the surface" can be categorized as an observation.

Observation refers to the act of noticing or perceiving something through the senses. In this case, the statement describes a specific event that was directly observed: the opening of a bottle of soda and the rapid appearance of bubbles in the liquid, which were then given off at the surface. This observation describes a phenomenon that can be witnessed and measured.

The appearance of bubbles when a bottle of soda is opened is a well-known and predictable occurrence. It can be explained by the principles of gas solubility and pressure.

The soda contains dissolved carbon dioxide (CO2) under high pressure, which is responsible for the carbonation. When the bottle is opened, the sudden release of pressure causes the dissolved CO2 to come out of solution, forming bubbles. These bubbles then rise to the surface and are released into the air.

While this statement captures an observed phenomenon, it does not propose a general principle or provide a comprehensive explanation of the underlying mechanisms. Therefore, it does not qualify as a law or theory, but rather as an observation based on direct sensory perception.

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In the given compound, there are 13 sigma covalent bonds present amongst C,H and O atoms.

Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.

Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .

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The mass of water produced by the reaction of the 23 g of \(SiO_2\)  is 13.8 g.

The given chemical reaction;

\(4Hf (g) \ + \ SiO_2 (s) \ --> \ SiF_4(g) \ + \ 2H_2O(l)\)

In the given compound above, we can deduce the following;

60 g of \(SiO_2\)  --------- 36 g of water

23 g of \(SiO_2\)  ------------- ? of water

\(mass \ of \ water = \frac{23 \times 36}{60} = 13.8 \ g \ of \ water\)

Thus, the mass of water produced by the reaction of the 23 g of \(SiO_2\)  is 13.8 g.

In the reaction of the given compound, \(4Hf (g) \ + \ SiO_2 (s) \ --> \ SiF_4(g) \ + \ 2H_2O(l)\), what mass of water (in grams) is produced by the reaction of 23.0 g of SiO2?

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The number of moles of O₂ are needed to combine with 6.2 moles of phosphorus is 7.75 moles.

The number of moles of a substance can be calculated using stoichiometry. Stoichiometry is the quantitative relationship between the reactants and products of a specific reaction or equation.

According to this question, phosphorus reacts with oxygen gas as follows:

4P + 5O₂ → 2P₂O5

Based on the above equation, 4 moles of phosphorus reacts with 5 moles of oxygen.

If 6.2 moles of P reacts, 7.75 moles of oxygen gas will be produced.

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H2 cannot be the chemical symbol for an element.

Chemical elements, functional groups, and compounds are all denoted by chemical symbols, which are shorthand abbreviations. Chemical elements are typically represented by one or two letters from the Latin alphabet, with the first letter capitalized.

Dihydrogen is referred to as H2. It is a gas molecule, an elemental molecule, and an elemental hydrogen. Dihydrogen is not a name for an element in the periodic table.

Two hydrogen atoms are linked by a single bond to form the elemental molecule known as dihydrogen. It serves as a fuel, an electron donor, an antioxidant, a human metabolite, and a component of the food packaging gas. It is a gas molecule, an elemental molecule, and an elemental hydrogen.

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Answer:

1. A scientist conducts and gathers research to gain knowledge in a particular area.

2. Many of the worlds problems include resources, energy, health, environment, climate, transportation, communication, etc. and will require solutions from science and engineering.

The solution of KCl in water will undergo precipitation of KCl crystals as the temperature decreases from 50 °C to 20 °C and then to 34 °C due to the decreasing solubility of KCl in water.

What happens to a solution of KCl in water when cooled from 50 °C to 20 °C and then to 34 °C?

When the solution of KCl in water is cooled from 50 °C to 20 °C, the solubility of KCl in water decreases. As a result, some of the KCl will start to come out of the solution and form solid crystals.

Then, when the temperature of the solution is further decreased from 20 °C to 34 °C, the solubility of KCl in water decreases even further, causing more KCl to come out of the solution and form solid crystals. This is known as precipitation.

The amount of KCl that will come out of the solution depends on the solubility of KCl at the respective temperatures. The solubility of KCl in water is about 34 g/100 mL at 20 °C and about 42 g/100 mL at 34 °C. Therefore, when the solution is cooled from 50 °C to 20 °C, some KCl will come out of solution until the concentration in solution reaches about 34 g/100 mL. Further cooling to 34 °C will cause more KCl to come out of solution until the concentration in solution reaches about 42 g/100 mL.

The exact amount of KCl that will come out of solution can be calculated using thermodynamic models and experimental data on the solubility of KCl in water at different temperatures.

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The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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1. s block elements have spherical s orbital as

their outermost orbital.

2. Since s orbital can accommodate a maximum of 2 electrons, each one of these elements have 1 or two electrons.

3. These s electrons are lost very easily to form

monopositive ions by Isoing one electron in the

outermost orbital or dipositive ions by losing 2

electrons.

4. They have low ionisation potentials and low electronegativities.

5. They are good conductors of heat and electricity, excepting H2 and He.

6. They are silvery, shiny metallic substances, (with the exception of hydrogen and helium which gaseous nonmetals).

7. They are malleable and ductile, i.e., we can

make sheets and wires from them, (exception:

H2, He)

8. They readily form ionic salts with most nonmetals.

hope it helps plzzz mark as brainliest

The factors that will cause an increase in the gas's solubility are:

1) The volume of the gas above the solution decreases when solution is added with a syringe.

This will increase the pressure of the gas above the solution, causing more gas molecules to dissolve into the solvent.

2) The temperature of the flask is raised.

An increase in temperature will cause the gas molecules to move faster and collide more frequently with the solvent molecules, increasing the solubility of the gas.

3) A reaction occurs between the gas solute and the solvent.

If the gas solute reacts with the solvent to form a new compound, the solubility of the gas will increase as the reaction will remove gas molecules from the gas phase and into the solution.

The other two factors (using a syringe to add a gas other than the solute and increasing the volume of the gas above the solution by removing solution with a syringe) will not cause an increase in the gas's solubility. Adding a gas other than the solute will not affect the solubility of the original gas solute, and increasing the volume of the gas above the solution will decrease the pressure of the gas, causing less gas molecules to dissolve into the solvent.

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Light energy travels in the form of waves.

If a reaction has a negative ΔG and a positive ΔS, the reaction will be spontaneous at all temperatures.

If a reaction is spontaneous at all temperatures, it implies that the reaction will occur without the need for any external intervention, such as the addition of energy. For a reaction to be spontaneous, it must satisfy the criteria of thermodynamic favorability, which is determined by the change in Gibbs free energy (ΔG) associated with the reaction.

The relationship between ΔG, temperature (T), and the equilibrium constant (K) of a reaction is described by the equation ΔG = ΔH - TΔS, where ΔH is the change in enthalpy and ΔS is the change in entropy.

To ensure spontaneity at all temperatures, two conditions must be met:

ΔG must be negative: A negative ΔG indicates a thermodynamically favorable reaction, meaning the products have a lower Gibbs free energy than the reactants. If ΔG is negative, the reaction will proceed spontaneously in the forward direction.

ΔS must be positive: A positive ΔS signifies an increase in the overall entropy of the system. Higher entropy means more disorder, and spontaneous reactions often involve an increase in randomness. When ΔS is positive, it can compensate for the enthalpic term, ΔH, allowing the reaction to proceed spontaneously.

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