275L/sec to mL/hour with work

The temperature increase from 20 °C to 46 °C indicates that the reaction between zinc and copper sulfate solution is exothermic, with heat being released into the surroundings.

In the given reaction between zinc and copper sulfate solution, the temperature change can provide insights into the type of heat change occurring during the reaction. Based on the provided information, the initial temperature of the copper sulfate solution was 20 °C, and the final temperature of the mixture after the reaction was 46 °C.

The temperature increase observed in this reaction indicates an exothermic heat change. An exothermic reaction releases heat energy into the surroundings, resulting in a temperature rise. In this case, the reaction between zinc and copper sulfate solution is exothermic because the final temperature is higher than the initial temperature.

During the reaction, zinc displaces copper from copper sulfate to form zinc sulfate and copper metal. This displacement reaction is known as a single displacement or redox reaction. Zinc is more reactive than copper and therefore replaces copper in the compound.

The formation of new chemical bonds during the reaction releases energy in the form of heat. This energy is transferred to the surroundings, leading to an increase in temperature. The heat released is greater than the heat absorbed, resulting in a net increase in temperature.

The exothermic nature of this reaction can be explained by the difference in bond energies between the reactants and products. The breaking of bonds in the reactants requires energy input, while the formation of new bonds in the products releases energy.

In this case, the energy released during the formation of zinc sulfate and copper metal is greater than the energy required to break the bonds in copper sulfate and zinc.

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2156.25 mL of the 44% solution are needed.  A homogeneous mixture has a uniform composition throughout and is also called a solution.

What is Mixture?

A mixture is a combination of two or more substances that are physically combined but not chemically bonded to each other. In a mixture, each substance retains its own chemical identity and properties, and can be separated from the mixture using physical means, such as filtration, evaporation, or distillation. Mixtures can be homogeneous or heterogeneous.

Let x be the volume (in mL) of the 44% solution needed.

Since we want to end up with 3 L (or 3000 mL) of 35% solution, we can set up the following equation to solve for x:

0.12(3000 - x) + 0.44x = 0.35(3000)

This equation balances the amount of solute (i.e. the active ingredient) in the mixture before and after mixing.

Simplifying and solving for x, we get:

360 - 0.12x + 0.44x = 1050

0.32x = 690

x = 2156.25 mL (rounded to the nearest hundredth)

Therefore, 2156.25 mL of the 44% solution are needed.

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Answer: b) calcium sulfide

Explanation:

The removal of hydrogen or any other electropositive element, or the addition of oxygen, is said to be the process of oxidation in classical or earlier concepts. An atom or ion gains one or more electrons during the process of reduction.

1. The oxidation half-reaction of copper is:

Cu  → Cu²⁺ + 2e⁻

The reduction half is:

Cu²⁺ + 2e⁻ → Cu

3. An anode in electrochemistry is, in its simplest form, the site of an oxidation reaction. Due to the anode's electrical potential, negative ions or anions usually react there and release electrons. After that, these electrons ascend and enter the drive circuit.

In chemistry, the cathode is referred to as the electrode where reduction takes place. In an electrochemical cell, this is typical. Here, the cathode is negative because the cell's electrical energy supply causes chemical molecules to break down.

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Answer: Hello! I do believe the answer is A.

Explanation: please mark me brainliest! hope this helps

Answer:

B

Explanation:

Data changes with a change in the variable means 'changes in one variable brings about changes in the other'

A change of variables is the basic technique in which it is used to simplify problems in which originals variables are replaced with function of other variables and that's why data is also change and sketch the region given by the problem in the xy plane and then write the equation of the curves that form the boundary

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Answer Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter "P." Neutrons have no electrical charge.

Explanation:

The amount of heat required to raise the temperature of the 34.2 g sample of aluminum by 34 oC is 1043.52 J.

What is Temperature?

Temperature is a measure of the average kinetic energy of the particles in a substance. It is a physical property that determines the direction of heat flow between two objects or systems in contact with each other. Temperature is measured in degrees Celsius (°C) or Fahrenheit (°F), or in kelvin (K) in the International System of Units (SI).

The amount of heat (q) required to raise the temperature of a substance can be calculated using the formula:

q = m x c x ΔT

Where:

m = mass of the substance (in grams)

c = specific heat of the substance (in J/g oC)

ΔT = change in temperature (in oC)

Plugging in the values given:

m = 34.2 g

c = 0.9 J/g oC

ΔT = 34 oC

q = (34.2 g) x (0.9 J/g oC) x (34 oC)

q = 1043.52 J

Therefore, the amount of heat required to raise the temperature of the 34.2 g sample of aluminum by 34 oC is 1043.52 J.

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Answer:

White school glue is liquid because its long polymers can slide over and along one another. It does not flow easily, though; it is quite viscous. The addition of some chemicals—such as a borax solution (or sodium tetraborate decahydrate dissolved in water)—can cause cross-links to form between the polymers.

Explanation:

Answer:

It is a liquid :]

Answer:

rising water levels because of melting icebergs, and increased wildfires

Explanation:

Answer:

20.89 LITERS

Explanation:

P1V1=P2V2

P1V1 / P2 = V2

98.7 * 12/56.7 = 20.89 LITERS

Answer:

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.In other words, the mass and the charge are balanced on both sides of the reaction.

Explanation:

The order of elements from the highest electronegativity at the top to the lowest at the bottom is:

The electronegativity of an element is a measure of the ability of an element to attract electrons to itself.

The electronegativity of elements in the periodic table show periodicity.

The electronegativity of elements increases from left to right across a period but decreases from up to down in a group.

Hence, the most electronegative element is fluorine and the least electronegative element is cesium.

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Answer:

Explanation:

H

Mass percent can be calculated from the mass of solute in grams divided by the mass of solution multiplied by 100. The percent by mass of the solute in aqueous solution of 27.2 g  ethanol in 250 g of total solution 10.88 %.

Mass percentage is term used to represent the concentration of a solution. Mathematically mass percent of a component in a mixture is  the mass of the component divided by the total mass multiplied by 100.

A solution  is made of a solvent and solute. Thus, the total mass of the solution is the sum of mass of solute and mass of the solvent. Here, the solute is ethanol with a mass of 27.2 g. The total mass of solution is 250g.Hence, the mass percent of ethanol can be calculated as follows:

Mass percent of ethanol = mass of ethanol/total mass ×100

                                         =   (27.2/250)×100

                                         = 10.88 %.

Hence, the percent by mass of solute ethanol in the total solution is 10.88%.

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The Px, Py, and Pz orbitals are called degenerate orbitals because they have the same energy. In other words, they are three orbitals that are equivalent in terms of their energy levels.

Degeneracy in this context means that these orbitals have the same energy and are indistinguishable from each other in terms of their properties. The Px, Py, and Pz orbitals belong to the p sublevel, which is characterized by three orbitals aligned along the x, y, and z axes, respectively. These orbitals are oriented perpendicular to each other.

The degeneracy of the Px, Py, and Pz orbitals arises from the symmetry of the system. Since these orbitals have the same energy, they are all equally likely to be occupied by electrons. This degeneracy allows for electron movement and distribution within the p sublevel without any preference for a specific orbital.

The degenerate nature of these orbitals has important implications in molecular bonding and chemical reactions. For example, during hybridization, the degenerate p orbitals can combine to form hybrid orbitals with different shapes and orientations, such as sp, sp2, or sp3 hybrid orbitals.

These hybrid orbitals then participate in bonding with other atoms, enabling the formation of various molecular geometries and structures.

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Answer:

Tesla used another scientist’s research as inspiration. (The last one)

Explanation:

Tesla used someone elses idea of a rotating magnetic field. This dosen't mean he plagarized another scientist work, but he needed the scientific concept to create something new.

Explanation:

METALS

metals tend to be hard, Metallic solids with high electric and thermal conductivity values and high melting and boiling points

NON METALS

non metals tend to be softer,often colourful elements that may be solids,liquids or gases

Answer:

metals are metals and nonmetals are not metals

The net ionic equation for the reaction between hydrofluoric acid (HF) and potassium hydroxide (KOH):

Balanced Chemical Equation:

HF + KOH → KF + H2O

Net Ionic Equation:

HF + OH- → F- + H2O

The coefficients for the net ionic equation are 1 for each reactant and product.

Hydrofluoric acid (HF) is a highly corrosive and toxic inorganic acid with a wide range of industrial and laboratory applications. It is used as a cleaning agent for removing surface deposits, stains, and other unwanted material from glass, metals, and ceramics.

When aqueous solutions of hydrofluoric acid and potassium hydroxide are mixed, they react to form a salt and water. During the reaction, the hydrofluoric acid donates a hydrogen ion (H+) to the potassium hydroxide, which accepts it to form water and the salt potassium fluoride.

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Answer:

Explanation:

mass of N2                Mass of3 H2

2x (14) g/mole                     3x(2x1) g/mole

        X        g                           5.8 g

  mass of nitrogen = 27 g

An annular eclipse looks like a bright ring in the sky. This is because the Moon is positioned farther away from Earth than during a total solar eclipse, so the Moon appears smaller than the Sun, leaving a thin ring of sunlight visible around the outline of the Moon.

A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

Thus, Many waterfalls are transient and only occur during rainstorms because of their location in the landscape, where they are often over bedrock and fed by a small contributing region.

 For general knowledge, we are listing the "Top 10 Highest Waterfalls in India" here. The Kunchikal Falls are the second-highest waterfall in Asia and the highest in all of India.

The waterfall, which is close to Agumbe in Karnataka's Shimoga district, has a height of 1,493 feet. The Varahi River creates the biggest waterfall. The sole permanent rain forest research is located in Agumbe Valley, one of India's most heavily rained-on regions.

Thus, A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

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Answer:

(a) 2.273  (b) 6.07

Explanation:

We need to find the values of the given expression.

(a) (2.3) - 0.027

= 2.273

(b) (2.3)²+0.69 +0.09

=5.29 + 0.78

= 6.07

Hence, this is the required solution.

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

The number of protons, neutrons, and electrons in isolated ions having the following nuclear symbols:

a) ¹⁹F⁻ has 9 protons 10 neutrons 10 electrons

b) ²⁴Mg²⁺ has 12 protons 12 neutrons 10 electrons

c) ⁵⁶Fe³⁺ has 26 protons 30 neutrons 23 electrons

a) ¹⁹F⁻

The atomic no. of F is 9 . atomic number shows the no. of protons. the no. of protons is 9. number of protons = no. electrons for neutral atom but here -1 shows one extra electron. number of electrons is 10. neutrons is the difference in mass no. and the atomic number. number of neutrons = 19 - 9 = 10

¹⁹F⁻ has 9 protons 10 neutrons 10 electrons

b) ²⁴Mg²⁺

The atomic no. is 12 . number of protons is 12. +2 represents 2 electrons are removed. number of electrons is 10. neutrons = mass no. - atomic no. number of neutrons = 30

²⁴Mg²⁺ has 12 protons 12 neutrons 10 electrons

c) ⁵⁶Fe³⁺

The atomic number is 26. number of protons = 26. +3 means three electrons are removed. number of electrons are 23. neutrons = 56 - 26 = 30.

⁵⁶Fe³⁺ has 26 protons 30 neutrons 23 electrons

Thus, The number of protons, neutrons, and electrons in isolated ions having the following nuclear symbols:

a) ¹⁹F⁻ has 9 protons 10 neutrons 10 electrons

b) ²⁴Mg²⁺ has 12 protons 12 neutrons 10 electrons

c) ⁵⁶Fe³⁺ has 26 protons 30 neutrons 23 electrons

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Answer:

0.13 J/gC i believe.

Explanation:

Answer:

130.133 J/(kg·K)

Explanation:

Result in other units:

0.130133 J/(g·K)

31.0876675695 cal/(kg·K)

0.0310876675695 kcal/(kg·K)

0.130133 J/(g·°C)

The solubility of\(LaF_3\) in water is 3.04 x 10^-6 mol/L.

The solubility of \(LaF_3\) in water can be determined using the Ksp expression:

\(Ksp = [La^{3+}][F^-]^3\)

Where \([La^{3+}]\)and \([F^-]\) are the molar concentrations of the \(La^{3+}\) and \(F^-\) ions in the solution.

Since each \(LaF_3\) formula unit dissociates into one \(La^{3+}\) ion and three \(F^-\) ions, the molar solubility of \(LaF_3\) can be represented as x. Thus, the molar concentrations of \(La^{3+}\) and \(F^-\) ions in the solution can be written as x and 3x, respectively.

Substituting these values into the Ksp expression gives:

Ksp = x*(3x)^3 = 27x^4

Now, we can solve for x:

x = (Ksp/27)^(1/4)

= (2 x 10^-19 / 27)^(1/4)

= 3.04 x 10^-6 mol/L

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Answer:

The answer to your question is given below.

Explanation:

We'll begin by converting 100 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

100 mL = 100 mL × 1 L / 1000 mL

100 mL = 0.1 L

Next, we shall determine the number of mole of NaCl in the solution. This can be obtained as follow:

Volume of solution = 0.1 L

Molarity of NaCl = 0.250 M

Mole of NaCl =?

Molarity = mole / Volume

0.250 = mole of NaCl / 0.1

Cross multiply

Mole of NaCl = 0.250 × 0.1

Mole of NaCl = 0.025 mole

Finally, we shall determine the mass of 0.025 mole of NaCl. This can be obtained as follow:

Mole of NaCl = 0.025 mole

Molar mass of NaCl = 23 + 35.5

= 58.5 g/mol

Mass of NaCl =?

Mole = mass / Molar mass

0.025 = mass of NaCl /58.5

Cross multiply

Mass of NaCl = 0.025 × 58.5

Mass of NaCl = 1.46 g

Thus, to prepare the solution, weigh out 1.46 g of NaCl and dissolve in 1 L of water.