2 Write a word equation and
a symbol equation for the
reaction of solid zinc oxide
(ZnO) with sulfuric acid.

Answer:

Mercury

Explanation:

It is also highly toxic

Answer:

coal

Explanation:

Hope this helps please mark brainliest

The ability to exert a force that causes an item to move is what is meant by the definition of energy as the "power to accomplish work." Even though the definition is unclear, the meaning is clear: energy is simply the force that moves things. Potential energy and kinetic energy are the two categories of energy.

Renewable energy is frequently cited as the most important shift the world can make to fend off the worst consequences of global warming. This is due to the fact that renewable energy sources like solar and wind don't produce greenhouse gases like carbon dioxide, which contributes to global warming.

Wind, sunlight, bioenergy (organic matter burned as fuel), and hydroelectricity, including tidal energy, are a few examples of renewable energy sources.

The ability to exert a force that causes an object to move is what the definition of energy as "power to accomplish work" refers to. Despite the ambiguity of the definition, the meaning is clear: energy is simply the force that moves things. The two types of energy are potential energy and kinetic energy.

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φ(g1 * g2) = eH = φ(g1) * φ(g2).

This completes the proof that φ: G → H is a group homomorphism.

By showing that the map φ preserves the group operation, we have demonstrated that it is a group homomorphism.

To prove that φ: G → H is a group homomorphism, we need to show that it preserves the group operation. In other words, for any two elements g1 and g2 in G, φ(g1 * g2) = φ(g1) * φ(g2), where * denotes the group operation in G, and * denotes the group operation in H.

Given that φ(g) = eH for all g ∈ G, where eH is the identity element in H, we can start the proof as follows:

Let g1, g2 ∈ G. We want to show that φ(g1 * g2) = φ(g1) * φ(g2).

Since φ(g) = eH for all g ∈ G, we have φ(g1) = eH and φ(g2) = eH.

Now, consider the product g1 * g2 in G. Applying φ to both sides, we have:

φ(g1 * g2) = φ(g1) * φ(g2).

Substituting the values of φ(g1) and φ(g2), we get:

φ(g1 * g2) = eH * eH.

Since eH is the identity element in H, the product eH * eH is simply eH.

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1. a chemical bond between atoms with similar electronegativities - covalent bond

2. a measure of the ability of an atom to attract electrons within a chemical bond - Electronegativity

3. a bond between atoms of greatly differing electronegativities - Ionic bond

4. the bond formed in metals, holding metals together - Metallic bond

A covalent bond is a bond formed by sharing electrons between two atoms that occur in the bond. It generally forms between atoms with similar electronegativity values.

An ionic bond is a bond formed between two oppositely charged ions of her and held by strong electrostatic attraction. It forms between atoms that have vastly different electronegativities.

Electronegativity is the tendency of an atom in a covalent bond to attract a shared pair of electrons.

A metallic bond is a bond formed by electrostatic attraction between a positively charged metal ion and a conduction electron.

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Answer:

The triple beam balance

The first patented dishwasher was made of copper by Joel Houghton in 1850.

A dishwasher is a machine used to clean and sanitize kitchen utensils and dishes automatically. It was invented to make life easier for homemakers who were frequently frustrated by the time-consuming and labour-intensive process of cleaning up after meals. This was the first practical mechanical dishwasher, which was cranked by hand while water sprayed onto the dishes.

The dishwasher is an essential device in modern kitchens, making life more convenient for busy people who don't have the time to clean and sanitize dishes by hand. In addition, dishwashers conserve water by using less water to clean dishes than would be used by washing dishes by hand.

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Answer: Caesium

Explanation:

Caesium has the lowest ionization energy. With the lowest ionization energy, it is the one that will most easily give up electrons.

Answer: cesium

Explanation:(cs)

The melting point (mp) of the semicarbazone derivative measured at 161 ºC is higher than the literature value.

The melting point is a characteristic property of a compound and can be used to identify and assess its purity. When comparing the measured mp to the literature value, we can determine if the compound is lower, exact, or higher than expected.

In this case, since the measured mp is higher than the literature value, it suggests that the compound obtained is impure or contains impurities that affect its melting behavior. Impurities can raise the melting point of a compound by disrupting the regular arrangement of molecules and increasing the energy required for the solid to transition into a liquid phase. Therefore, further purification or analysis may be necessary to obtain the compound with the expected or published mp.

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Explanation:

Refer to pic......... ..

To produce 180 millilitres of a saline solution of the same concentration, we need 1.2 milligrams of salt.

It is given that a ratio of 0.5 milligrams of salt is present in 75 millilitres of solution. Let us assign a variable x to the amount of salt present in 180 millilitres of saline solution.

To maintain the same concentration we can use the method of cross-multiplication:

The following equation can be used to determine the value of x:

0.5 mg / 75 ml = x mg / 180 ml

( 0.5 × 180) / 75 = x mg

x mg = 90 / 75

Hence x is approximately equal to 1.2 mg.

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The molecular formula CH₃CH(CH₃)₂ is the condensed formula for the hydrocarbon methylpropane.

Organic compounds are compounds that are obtained from organic materials.

The most common organic compound are the hydrocarbons,

The hydrocarbons includes the alkanes, alkenes, alkynes, etc.

The given compound CH₃CH(CH₃)₂ is the condensed formula for the hydrocarbon methylpropane.

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0.956 grams of sulfur must be obtained.

The experiment demonstrates the Law of Definite Proportions. This law states that in any chemical compound, the elements are always present in the same proportions by mass.

In this experiment, hydrogen and sulfur combine to form hydrogen sulfide. The mass of hydrogen in hydrogen sulfide is always 0.419 grams, and the mass of sulfur is always 0.956 grams. This is because the elements combine in a fixed ratio of 1:2.

If 0.419 grams of hydrogen are obtained, then 0.956 grams of sulfur must be obtained to satisfy the Law of Definite Proportions.

Here is a table of the masses of hydrogen and sulfur in hydrogen sulfide:

Element Mass

Hydrogen 0.419 g

Sulfur 0.956 g

The Law of Definite Proportions is a fundamental law of chemistry that is based on the principle of conservation of mass. This law states that the elements in a chemical compound always combine in the same proportions by mass. This is because the atoms of the elements in a compound are always combined in the same ratio.

The Law of Definite Proportions is important because it allows us to calculate the masses of the elements in a chemical compound. This information is essential for many chemical calculations, such as determining the formula of a compound or calculating the yield of a reaction.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

The second law of thermodynamics states that the total entropy of an isolated system can never decrease over time, and is constant if and only if all processes are reversible.

Explanation:

Isolated systems spontaneously evolve towards thermodynamic equilibrium, the state with maximum entropy. hope this helps you :)

The second law of thermodynamics say about entropy The entropy in a system and its surroundings tends to increase.

According to the second law of thermodynamics, Entropy of the universe keeps on increasing overtime. When the entropy decreases and enthalpy increases the free energy change,  ΔG, is positive and not spontaneous, and it does not matter what the temperature of the system is. Temperature comes into play when the entropy and enthalpy both increase or both decrease. The reaction is not spontaneous when both entropy and enthalpy are positive and at low temperatures, and the reaction is spontaneous when both entropy and enthalpy are positive and at high temperatures. The reactions are spontaneous when the entropy and enthalpy are negative at low temperatures, and the reaction is not spontaneous when the entropy and enthalpy are negative at high temperatures.

Therefore, The second law of thermodynamics say about entropy The entropy in a system and its surroundings tends to increase.

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Answer:

D

Explanation:

I took this class

The sample of neon gas at STP represents approximately 0.0209 moles.

To calculate the moles of neon gas in a sample, we can use the Ideal Gas Law formula at Standard Temperature and Pressure (STP):

PV = nRT

At STP, the temperature (T) is 273.15 K and the pressure (P) is 100 kPa (or 1 atm).

Since the volume (V) is given as 469 cm³, we need to convert it to liters:

469 cm³ × (1 L / 1000 cm³) = 0.469 L

Now, we can use the Ideal Gas Law formula with R as the ideal gas constant (8.314 J/mol K for kPa, or 0.0821 L atm/mol K for atm):

n = PV / RT

Using the values for atm:

n = (1 atm × 0.469 L) / (0.0821 L atm/mol K × 273.15 K)

n ≈ 0.0209 mol

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Explanation:

A..........is the correct answer

if it helps you then plzz mark me brainliest

Answer:

The other answer is wrong! Its...

B. A display of points that shows the relationship between two sets of data

Explanation:

Hope this helps!

Answer:

D

Explanation:

In glucose, each carbon atom forms four bonds, each oxygen atom forms two bonds, and each hydrogen atom forms one bond. The total number of bonds in glucose is 48 bonds.

Each carbon, oxygen, and hydrogen atom in glucose form a different number of bonds. In glucose, there are six carbon atoms, twelve hydrogen atoms, and six oxygen atoms. The carbon atoms each form four bonds, two of which are with other carbon atoms, and the other two are with hydrogen or oxygen atoms. The oxygen atoms each form two bonds, one with a carbon atom and one with a hydrogen atom. The hydrogen atoms each form one bond, which is with a carbon or oxygen atom.

Therefore, the total number of bonds in glucose is as follows:
- Carbon atoms: 6 x 4 = 24 bonds
- Oxygen atoms: 6 x 2 = 12 bonds
- Hydrogen atoms: 12 x 1 = 12 bonds

So the total number of bonds in glucose is 24 + 12 + 12 = 48 bonds.

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The chemical reaction that allows cells to store chemical energy is called cellular respiration. This process involves a series of reactions that occur in the presence of oxygen and glucose, resulting in the production of ATP, or adenosine triphosphate, which is the primary energy molecule used by cells.

During cellular respiration, glucose is broken down into carbon dioxide and water, and the energy released from this reaction is used to produce ATP through a process called oxidative phosphorylation. This occurs in the mitochondria of cells, which are specialized organelles responsible for energy production.

In addition to oxidative phosphorylation, there are two other stages of cellular respiration: glycolysis and the Krebs cycle. Glycolysis occurs in the cytoplasm of cells and involves the breakdown of glucose into smaller molecules, which are then further processed in the Krebs cycle. This cycle occurs in the mitochondria and involves a series of reactions that generate energy-rich molecules such as NADH and FADH2.

Overall, cellular respiration is a complex process that allows cells to convert the chemical energy stored in glucose into a form that can be readily used to power cellular processes. This is essential for the survival and functioning of all living organisms.

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Answer:

Okay well simply drop it from one inch on to the ground and it won't break and you could put it into a basket with bubble wrap.

Explanation:

Well if you wrap the egg into bubble wrap a few times them put it into a basket (its your choice) then it won't break because the bubble wrap will just pop a few times but sometimes it depends on where you are dropping it from.

Have a blessed day bye! ;)

Answer:

13598 J

Explanation:

Q = m × c × ∆T

Where;

Q = amount of energy (J)

m = mass (grams)

c = specific heat capacity

∆T = change in temperature

m = 65g, specific heat capacity of water = 4.184J/g°C, initial temperature= 100°C, final temperature = 150°C

Q = 65 × 4.184 × (150 - 100)

Q = 271.96 × 50

Q = 13598 J

Hence, 13598 J of energy is required to boil 65 grams of 100°C water and then heat the steam to 150°C.

The climate type known for clear skies in the summertime is the Mediterranean climate.

Mediterranean climates are characterized by dry, hot summers and mild, wet winters. These regions experience abundant sunshine and relatively low cloud cover during the summer months, leading to clear skies. This weather pattern is conducive to outdoor activities and promotes a Mediterranean lifestyle. Examples of regions with a Mediterranean climate include parts of Southern Europe, California, Chile, South Africa, and parts of Australia.

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The standard reaction enthalpy for the given reaction is +235.8 kJ/mol.

The standard reaction enthalpy (ΔH°) for the given reaction is determined as follows:

Equation of reaction: 3 Fe₂O₃ (s) → 2 Fe₃O₄ (s) + ½ O₂ (g)

The standard enthalpy of formation values for Fe₂O₃ (s), Fe₃O₄(s), and O₂(g) is used to calculate the standard reaction enthalpy.

ΔH° = [2 × ΔH°f(Fe₂O₃)] + [½ × ΔH°f(O₂)] - [3 × ΔH°f(Fe₃O₄)]

where;

ΔH°f(Fe₂O₃) = -824.2 kJ/mol

ΔH°f(Fe₃O₄) = -1118.4 kJ/mol

ΔH°f(O₂) = 0 kJ/mol

ΔH° = [2 × (-1118.4 kJ/mol)] + [½ × 0 kJ/mol] - [3 × (-824.2 kJ/mol)]

ΔH° = -2236.8 kJ/mol + 0 kJ/mol + 2472.6 kJ/mol

ΔH° = 235.8 kJ/mol

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Taking into account the definition of dilution, the correct answer is option C): 75 mL of the stock solution are required to prepare 250 mL of a 1.50 M solution.

You have to know that when it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where:

In this case, you know:

Replacing in the definition of dilution:

5 M× Vi= 1.5 M× 0.250 L

Solving:

Vi= (1.5 M× 0.250 L)× 5 M

Vi= 0.075 L= 75 mL

In summary, the correct answer is option C): 75 mL of the stock solution are required to prepare 250 mL of a 1.50 M solution.

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Answer:

D or A your choice

Explanation:

uhhh didnt u- nvm

A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate wate

the no. of Al atoms required to be laid side by side to make up a distance of 4.23 mm is = 4.23/(2 * 143 * 10^(-9) )

= 14790210 atoms of Al.

What is the radius of an atom?

The atomic radius of an atom is the distance between the centre of the nucleus and the outermost electron in each of its energy shells. Since the border is not a clearly defined physical entity, there are many non-equivalent definitions of atomic radius. The four most popular ways to define atomic radius are van der Waals radius, ionic radius, metallic radius, and covalent radius. Due to the challenges of isolating individual atoms to measure their radii, atomic radii are frequently measured in a chemically bonded state; yet, theoretical calculations are simpler when individual atoms are taken into account.

1 pm = 10^(-9) mm

radius of Al atom = 143 pm = 143 * 10^(-9) mm

Diameter of Al atom = 2 * 143 * 10^(-9) mm

Thus, the no. of Al atoms required to be laid side by side to make up a distance of 4.23 mm is = 4.23/(2 * 143 * 10^(-9) )

= 14790210 atoms of Al.

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0.200 atm can be converted to the following units of pressure as follows:

Pressure is defined as the physical force exerted on an object. The force applied is perpendicular to the surface of objects per unit area.

Pressure can be measured using the following units:

0.200 atm is equivalent to 20265 pascals since 1 atmosphere = 101325 pascals.

0.200 atm is equivalent to 152mmHg since 1 atm = 760 mmHg

0.200 atm is equivalent to 152 torr since 1 atm = 760 torr

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The sample with the higher vapor pressure is Sample B, because it has a smaller volume and therefore the molecules of the liquid have less space to move around in and are more likely to escape into the vapor phase. The concept used to answer this question is the Ideal Gas Law and the relationship between vapor pressure and the volume of a container.

The Ideal Gas Law states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. Vapor pressure is defined as the pressure exerted by the vapor of a substance in equilibrium with its liquid phase. The smaller the volume of a container, the greater the likelihood that the molecules of a liquid will escape into the vapor phase, leading to a higher vapor pressure.

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