How many grams of Al would be needed to displace all of the copper ions in 71.8 mL of 0.610 M CuSO4?

Answer:

Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport.

Explanation:

In glycolysis, glucose is split into two molecules of pyruvate. This results in a net gain of two ATP molecules.

Answer:

Cl2

Explanation:

Chlorine is a diatomic element  so it is   Cl 2

 the others are MOLECULES  (made up of atoms of ELEMENTS)

The data collected by Leah and Paul supports Paul's opinion that matter can exist even when it is not visible.

Support is a term used to describe a range of services and resources offered to individuals in need. It can refer to providing help with practical tasks, such as helping someone to manage their finances or providing transport to medical appointments. It can also refer to providing emotional or social support. This could involve providing counselling or having regular conversations to help someone to feel understood and supported. Support can also refer to offering advice and guidance, or providing a safe space for someone to talk and express their feelings. In its broadest sense, support is about helping someone to have the best quality of life they can.

This is because the mass of the inflated bag is greater than the mass of the empty bag despite the fact that the volume of the inflated bag is much greater. This shows that the inflated bag contains air, which is matter, even though it cannot be seen.

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Explanation:

The heart of the doorbell is an electromagnetic so yeah it does.

Answer: Sucrose is a glycosyl glycoside formed by glucose and fructose units joined by an acetal oxygen bridge from hemiacetal of glucose to the hemiketal of the fructose.

Explanation:

Answer:

c. benzoic acid

Explanation:

The given reaction is an example of a Grignard reaction:

When chlorobenzene (C₆H₅Cl) reacts with Mg in ether, an intermediate is formed (C₆H₅MgCl).

Said intermediate then reacts with CO₂ producing a benzoic acid salt (C₆H₅CO₂X), this salt is then neutralized with dilute HCl producing benzoic acid (C₆H₅CO₂H).

Answer

(e) 6.20

Explanation

The pH of the solution can be calculated using the formula below:

Note that:

Put Ka = 4.5 x 10⁻¹³ into the pKa formula:

Put pKa = 12.35 and c = 0.90 into the pH formula above:

The pH = 6.20

The correct option is (e) 6.20

Answer:

\(mol=0.0709mol\)

Explanation:

Hello,

In this since one mole equals 6.022x10²³ particles of silver by means of the Avogadro's number, we can compute the moles in 4.27x10²² particles as shown below:

\(mol=4.27x10^{22}particles*\frac{1mol}{6.022x10^{23}particles}\\\\mol=0.0709mol\)

Best regards.

Answer:

Neutrons and protons

Explanation:

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

The can would explode if the temperature reaches 10.94°C or higher. We can use the combined gas law to solve this problem.

(P1 * V1) / (T1) = (P2 * V2) / (T2) where P1 is the initial pressure, V1 is the initial volume (which we can assume is constant for an aerosol can), T1 is the initial temperature, P2 is the final pressure (which we know is 3.30 atm), V2 is the final volume (which we can assume is constant for an aerosol can), and T2 is the final temperature (which we want to find).

First, we need to convert the initial pressure to units of atm:

P1 = 3.00 atm

Next, we can plug in the values and solve for T2:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

(3.00 atm * V1) / (25°C + 273.15) = (3.30 atm * V2) / (T2 + 273.15)

Multiplying both sides by (T2 + 273.15) and dividing by 3.30 atm, we get:

(T2 + 273.15) = [(3.00 atm * V1) / (25°C + 273.15)] * [(T2 + 273.15) / (3.30 atm * V2)]

Simplifying, we get:

T2 + 273.15 = (3.00 / 3.30) * (25°C + 273.15)

T2 + 273.15 = 284.09 K

Subtracting 273.15 from both sides, we get:

T2 = 10.94°C

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We gain oxygen from trees through the process of photosynthesis. Photosynthesis is the biochemical process in which green plants, including trees, use sunlight, water, and carbon dioxide to produce oxygen and glucose (a form of sugar).

Trees have specialized cells called chloroplasts, which contain a pigment called chlorophyll. Chlorophyll absorbs sunlight energy.

The tree's leaves capture sunlight and use it to convert carbon dioxide (CO2) from the air and water (H2O) from the roots into glucose (C6H12O6) and oxygen (O2).

During photosynthesis, the chlorophyll in the chloroplasts helps to split water molecules into hydrogen ions (H+) and oxygen atoms (O). The oxygen atoms then combine to form O2 molecules.

The oxygen produced during photosynthesis is released into the atmosphere through tiny pores called stomata found on the surface of the tree's leaves. From there, it mixes with the surrounding air and becomes available for us to breathe.

In summary, trees produce oxygen as a byproduct of photosynthesis. They play a crucial role in maintaining the balance of oxygen and carbon dioxide in the atmosphere, providing us with the oxygen we need for respiration.

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Water molecules did not have a slight negative charge on one end and a slight positive charge on another, the loss of polarity would have profound effects on various biological, chemical, and physical processes. The unique properties of water that are vital for life as we know it would be significantly altered, potentially rendering many biological systems nonfunctional and disrupting the stability of ecosystems.

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The new volume (in L) is 12.2 L

Information given:

Volume 1 = 15.0 L

Temperature 1 = 298 K ---------> Temperature 2 = 383 K

Pressure 1 = 3.36 Atm -----------> Pressure 2 = 5.308 Atm

Information they're asking: New Volume 2?

Substituting it with numbers (Yay! we were provided Kelvins, that's always a plus), we get;

3.36 Atm * 15.0 L * 383 K = V2  = 12.2 L

298 K * 5.308 Atm

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Answer:

126.99g

Explanation:

NiO has a molar mass of 74.7 g/mol. This means that one mole of nickel (II) oxide has a mass of 74.7 grams. We can use stoichiometry/dimensional analysis to figure out how many grams are in 1.7 moles.

\(1.7mol NiO (\frac{74.7grams}{1 mole} ) = 126.99g\)

Answer: mass m = n M = 1.7 mol × 74.69 g/mol

Explanation:

Molar mass M(NiO) = (58.69+16) g/mol

The most accurate statement about signal transmissions among the given options is:

a) All signals in transmission will lose clarity with distance.

When a signal is transmitted over a distance, it can experience various types of degradation or attenuation. Factors such as distance, interference, noise, and the medium through which the signal travels can all contribute to a reduction in the clarity or quality of the signal. This means that as the distance between the source and receiver increases, the signal may become weaker, distorted, or prone to interference, resulting in a loss of clarity.

We can determine the following based on the provided information:

Metal nitrate A is a compound that, when heated, transforms into colourless gas, brown gas B, and a metal oxide with a yellowish brown hue. B. C: Colourless petrol C. B: Brown petrol C. D: Compound D, a yellow precipitate produced by the reaction of potassium iodide with an aqueous solution of compound A.

We may deduce that A is probably lead nitrate (Pb(NO3)2) because lead is frequently used in soldering alloys and the metal contained in A is utilised in an alloy for soldering purposes.

Identifications:

Lead nitrate, or Pb(NO3)2,

N2O: Nitrogen dioxide

B: Carbon (CO)

D: PbI2, or lead iodide.

Thus, this can be concluded regarding the given scenario.

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Your question seems incomplete, the probable complete question is:

A metal nitrate A on heating gives a yellowish brown coloured metal oxide along with brown gas B and a colourless gas C. An aqueous solution of A on reaction with potassium iodide forms a yellow precipitate of compound D. Identify A, B, C and D. Also, identify the types of reactions taking place. Metal present in A is used in an alloy which is used for soldering purposes.

Answer:

B.

Explanation:

The only way to make this comparison is by comparing their position to a fixed object outside the vehicle. Comparing to a fixed object inside the vehicle will show no movement, while a moving object inside the vehicle will seem as though the car is still while the object is in motion. Comparing to a moving object outside the vehicle will conflict with the vehicle, if the object is moving at the same speed and direction as the vehicle, it will seem as though neither is moving. The only way to make this comparison correctly is by comparing to an object outside the vehicle that is not moving so that the only variable that can be moving is the vehicle itself.

Answer:

This means Cu has 29 electrons as a neutral element. Cu-67 has 29 protons, 38 neutrons, 29 electrons.

Explanation:

Copper has 29 electrons, 29 protons, 38 neutrons.

The chemical element copper (Cu) is a reddish, very ductile metal belonging to Periodic Group 11 (Ib) that has an exceptional ability to conduct heat and electricity. In nature, copper may be found in its free metallic state.

Neolithic (New Stone Age) people originally utilized this local copper (about 8000 BCE) as a replacement for stone. Around 4000 BCE, Mesopotamia saw the beginning of metallurgy when copper was cast into molds, reduced to metal from ores with fire and charcoal, and purposefully alloyed with tin to become bronze (c. 3500 BCE).

Cyprus provided the majority of the copper the Romans used. Its name, Cyprium, or "metal of Cyprus," was eventually abbreviated to cyprium and then changed to cuprum. also, see bronze.

Basaltic lavas are a common source of native copper, which may also be found reduced from copper compounds including sulfides, arsenides, chlorides, and carbonates.

Therefore, copper has 29 electrons, 29 protons, and 38 neutrons.

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Given parameters:

  Chemical specie = LiClO₂

Unknown:

Percentage composition of each specie = ?

Solution:

The percentage composition involves knowing the percent of total mass of a compound is made up of each of the constituent elements or groups.

Formula mass of  LiClO₂;

              7 + 35.5 + 2(16) = 74.5g/mol

The percentage composition of each species are;

%Li  = \(\frac{7}{74.5}\) x 100  = 9.4%

%Cl  = \(\frac{35.5}{74.5} x 100\)  = 47.7%

%O₂  = \(\frac{32}{74.5} x 100\)  = 43.0%

As per the given details, Metal D is extracted from its oxide by reduction with hydrogen, and Metal E is removed from the earth as the metal itself.

Based on the provided information, we can match the metals to the methods used to extract them as follows:

Sodium - Extracted by electrolysis of a molten ionic compound.

Magnesium - Extracted from its oxide by reduction with carbon.

Carbon - Not a metal, so it doesn't apply in this context.

Metal E - Extracted from its oxide by reduction with hydrogen.

Iron - Removed from earth as metal itself.

Hydrogen - Not a metal, so it doesn't apply in this context.

Copper - Not a metal D or E, so it doesn't apply in this context.

Matching the metals to the extraction methods:

Sodium - extracted by electrolysis of a molten ionic compound.

Magnesium - extracted from its oxide by reduction with carbon.

Metal D - extracted from its oxide by reduction with hydrogen.

Metal E - removed from earth as metal itself.

Iron - removed from earth as metal itself.

Therefore, Metal D is extracted from its oxide by reduction with hydrogen, and Metal E is removed from the earth as the metal itself.

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An example of a biotic factor of an aquarium ecosystem is an  algae growing on the glass. Option B is the correct answer.

This refers to a living organism that shapes its environment. The examples of biotic factor that make up fresh water ecosystem are: aquatic plants, fish, amphibians,fungi, bacteria, and protists. and algae.

The biotic factors are gropped into : producers, consumers, and decomposers.

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1 mL = 0.815 g

11.2 mL = X

X = 11.2 × 0.815

= 9.128 g

mole = 9.128/58

= 0.157 mole

1 mole = 6.02 × 10^23 atoms

0.157 mol = x

X = 0.157/1 × 6.02 × 10^23

= 9.451 × 10^22 atoms of C

please to recheck answers to ensure they are correct

I really hope this helps

The symbol of the element in which it's ion has 38 protons, 36 electrons, and 40 neutrons is ⁷⁸₃₈Sr

To obtain the symbol of the element, we shall obtain the mass number of the element. This is shown below:

Mass number = Proton + Neutron

Mass number = 38 + 40

Mass number = 78

Finally, we shall determine the symbol of the element. Details below:

From the periodic table, the element with atomic number of 38 is Strontium.

Thus, the symbol of the element will be ⁷⁸₃₈Sr

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Pressure and volume can be regarded as the entity that is inversely proportional.

It should be noted that this explanatin an be done using the law in chemistry which is the Boyle's law which states that, for a given amount of gas and constant temperature, the volume is inversely proportional to the pressure.

However the Equal quantities of all gases can be seen to have same number of molecules when subjected to the same temperature and pressure (Avogadro's law).

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Answer: ice is less dense than liquid water. If ice was more dense, Earth would freeze.

Explanation: There are many reasons why life on Earth depends on the characteristics of water. One could discuss hydrogen bonds and its role as a solvent, but the unusual property of water is is the change in density with change in temperature. Water is densest at 4 degC, which is why ice floats - it is less dense than cold water (it melts quickly in warm water, so density isn’t impotant at higher temperatures). Most liquids are less dense than the solid, frozen form. If this was the case with water, any ice that formed would sink, and sease would freeze from the bottom up. Furthermore, the lowest layers would be insulated and would not all melt in summer. Thus over time, the seas would become a thin layer of liquid water at best, over solid ice. Life could not develop without liquid seas. In addition, ice is reflective, reducing the amount of sunlight absorbed, further reducing temperatures. Without ocean circulation, polar areas would be even colder, and there would be no rain.

Answer:

B. the gain of electrons

Explanation:

An easy way to remember this concept is the pneumonic OIL RIG:

Oxidation is Loss (of electrons)

Reduction is Gain (of electrons)