Compound X has the formula C8H14. X reacts with one molar equivalent of hydrogen in the presence of a palladium catalyst to form a mixture of cis- and trans-1,2-dimethylcyclohexane. Treatment of X with ozone follwed by zinc in aqueous acid gives a compound having both an aldehyde and a ketone group. What is the structure of X

Answer:

Dark matter slows down the expansion of the universe, while dark energy speeds it up

Explanation:

261.52 grams of zinc are needed to fully react with 8.0 moles of silver nitrate.

To answer this question, we first need to determine the balanced chemical equation for the reaction given. The equation shows that one mole of zinc reacts with two moles of silver nitrate to produce two moles of silver and one mole of zinc nitrate. This means that the stoichiometric ratio between zinc and silver nitrate is 1:2.

Next, we can use the given amount of silver nitrate (8.0 moles) to determine how much zinc is needed to react completely with it. Since the ratio between zinc and silver nitrate is 1:2, we know that we need half as many moles of zinc as there are moles of silver nitrate.

Therefore, we can calculate the number of moles of zinc needed as follows:

Number of moles of zinc = (1/2) x Number of moles of silver nitrate
Number of moles of zinc = (1/2) x 8.0 mol
Number of moles of zinc = 4.0 mol

Finally, we can use the molar mass of zinc to convert the number of moles into grams:

Mass of zinc = Number of moles of zinc x Molar mass of zinc
Mass of zinc = 4.0 mol x 65.38 g/mol
Mass of zinc = 261.52 g

Therefore, 261.52 grams of zinc are needed to fully react with 8.0 moles of silver nitrate.

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An attractive force that holds the electrons close to the nucleus is the strong nuclear force

definition of nuclear force

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The composition of the alpha phase in the alloy is 45 wt % A.

To find the composition of the alpha phase in the alloy (A-B), we can use a mass balance approach.

Let's assume we have a total mass of 100 grams of the alloy. Given that the mass fraction of both the alpha and beta phases is 0.5, we can determine the mass of each phase.

Mass of alpha phase = 0.5 × 100 grams

= 50 grams

Mass of beta phase = 0.5 × 100 grams

= 50 grams

Now, let's consider the composition of the beta phase, which is 90 wt % B and 10 wt % A. We can calculate the mass of each element in the beta phase.

Mass of B in beta phase = 90 wt % × 50 grams

= 45 grams

Mass of A in beta phase = 10 wt % × 50 grams

= 5 grams

Since the total mass of the alpha phase is 50 grams and the total mass of A in the beta phase is 5 grams, we can subtract the A mass in the beta phase from the alpha phase to get the composition of the alpha phase.

Composition of A in alpha phase = 50 grams - 5 grams

= 45 grams

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The calcium ion has 18 protons, 20 neutrons, and 20 electrons.
The relationship between the components a and b is Inverse proportion.


The calcium ion (Ca2+) has a 2+ charge, indicating that it has lost 2 electrons from its neutral state. To determine the number of protons, neutrons, and electrons in the calcium ion, we need to consider its atomic number and mass.

The atomic number of calcium is 20, which indicates that it has 20 protons. Since the calcium ion has a 2+ charge, it means it has lost 2 electrons. Therefore, the number of electrons in the calcium ion is 20 - 2 = 18.

The mass number of calcium is 40 amu, which represents the total number of protons and neutrons. Since the calcium ion has 20 protons, the number of neutrons can be calculated as 40 - 20 = 20.

So, the correct option is: d. 18 protons, 20 neutrons, and 20 electrons

In the expression a∼1/b, the relationship between the components a and b is an inverse proportion. This means that as the value of a increases, the value of b decreases, and vice versa. The symbol ∼ represents the proportional relationship between a and 1/b, indicating that they are inversely related. Therefore, the correct answer is: Inverse proportion

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The law of diminishing marginal rate of substitution indicates that the rate at which one input can be substituted for another decreases as the quantity of one input increases, leading to isoquants being bent toward the origin.

In other words, as the quantity of one good increases, the individual is willing to sacrifice fewer units of the other good to obtain an additional unit of the first good. This reflects a diminishing rate of substitution between the two goods.

The reason why the law of diminishing marginal rate of substitution suggests that isoquants must be bent toward the origin is rooted in the concept of diminishing marginal utility. As more units of a particular input (e.g., labor or capital) are added while holding other inputs constant, the additional output gained from each additional unit of the input will decrease. This diminishing marginal productivity leads to a decreasing MRS.

When isoquants (which represent different combinations of inputs that produce the same level of output) are bent toward the origin, it reflects the fact that as more of one input is used, the amount of the other input that needs to be substituted decreases. This bending signifies the diminishing MRS and captures the idea that a larger quantity of one input can be substituted for a smaller quantity of the other input to maintain the same level of output.

Overall, the law of diminishing marginal rate of substitution indicates that the rate at which one input can be substituted for another decreases as the quantity of one input increases, leading to isoquants being bent toward the origin.

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Answer:hey... do you still check this..?

Explanation:

Answer:

This question lacks options. The options are:

A. The two substances underwent a physical change

B. The two substances were melting

C. A new substance was forming

D. A change in the mass of the two substances

The answer is C

Explanation:

Changes in chemistry can either be physical or chemical. A physical change as the name implies does not alter the chemical content of the susbtances involved. However, chemical changes affect the chemical composition of the substances, hence, new substances are produced.

A chemical change is also characterized with a color change, temperature change, gas evolution etc. In this question, Mia mixed two substances in a test tube and noticed that the test tube became warm, gas came out from the test tube. This implies a CHEMICAL CHANGE, LEADING TO THE FORMATION OF NEW SUBSTANCES.

The fourth step of the Born-Haber cycle involves the formation of an ionic compound from its constituent ions.

The chemical equation for this step can be written as follows:
M₊(g) ₊ X-(g) → MX(s)
In this equation, M represents a metal cation, X represents a non-metal anion, and MX represents the ionic compound formed by their combination. The phase of each species is indicated in the equation: M₊(g) and X-(g) represent the gaseous ions, while MX(s) represents the solid ionic compound. This step involves the release of energy as the ions come together to form a stable compound.

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Answer:

This answer is 108g mass of aluminum is produced from 100g of aluminum oxide

Box has more acceleration as compared to the refrigerator because of more weight of a refrigerator.

Acceleration is defined as the process where the velocity of a body changes. Velocity is the combination of speed and direction. For getting acceleration, a change in speed or change in direction or change occurs in both. There are three types of acceleration i.e. uniform acceleration, non-uniform acceleration, and average acceleration. Uniform acceleration is the motion of an object that travels in a straight line with an increase in velocity at equal intervals of time. The main difference between the acceleration of the box and the refrigerator is that the mass of the box is lower than the refrigerator because of more weight of the refrigerator than the box.

So we can conclude that box has less weight as compared to the refrigerator which leads to more acceleration of the box.

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According to law of definite proportions, chemical compound always includes its constituent components in a fixed ratio.

The law of definite proportions, also known as Proust's law or the law of constant composition, holds that no matter the source or technique of manufacture, a particular chemical compound always includes its constituent components in a fixed ratio.

When two elements are combined to form a compound, their mass proportions are always the same. For instance, oxygen makes up roughly 8/9 of both the mass of just about any samples of pure water, and hydrogen make up the remaining 1/9.

Therefore, according to law of definite proportions, chemical compound always includes its constituent components in a fixed ratio.

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A molecule having four total electron groups around the central atom has three bonding electron groups and one nonbonding electron group. Its molecular structure is trigonal pyramidal.

One or more atoms are joined by covalent (chemical) bonds to form molecules. Atoms can be represented as circles with a nucleus at their center (consisting of protons and neutrons) and one or more concentric circles around them, which represent the "shells" or "levels" in which the electrons surrounding the atom's nucleus are located, along with markings indicating the electron at each level. The lowest unit into which a substance can be divided while still being the same substance is a molecule. It is composed of two or more atoms that are chemically bonded to one another.

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Answer:

D.

Explanation:

A concentrated solution is one that has a lot of solute (the substance being dissolved) in the solvent (the substance doing the dissolving). When a solution is concentrated, it means it has a high ratio of solute to solvent, so the answer is D.

Hope this helps.

Ions are  linked by the electrical charge present on them. Which is  moreover negative(-) or positive(+).

The  motes or  tittles which have lost or gained electrons are called ions. The in the imbalance between the number of protons and the neutrons.

Tittles or  motes which loose electrons come  appreciatively charged called cations and  tittles or  motes which gain electrons come negatively charged called anions.  

It's  pivotal to identify ions to understand the chemical  responses and the  conformation of  composites, because the charge present on them determines its  geste.

Also by counting the number of protons and electrons we can determine the charge on the ion.    

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The sequences based on their potential to modify protein products is given below.

Based on their potential to modify protein products, the sequences can be classified as follows:

TACCTTAATT → TACCTTAATTATT

GAGACCGT → GAGACCAGT

TATAATATTA → TATATATTA

ATTCATCTGG → ATTCATCGTGG

TACCTACT → TACCTACT

Lastly, GATCTTACTT → GATCTTACTT

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Balancing the equation :

KOH(aq) + HBr(aq) --> KBr(aq) + H2O(l)

This is the balanced chemical reaction because it follows the following ionic reaction:

H ^(aq)+ + Br^(aq)- + K^+(aq) + OH ^- (aq) → K^+(aq) + Br^-(aq) + H2O (l)

The none communicable disease in the given option is diabetes

A communicable disease is a type of disease that can be spread from one person to another.

Examples of communicable diseases include;

Thus, the none communicable disease in the given option is diabetes.

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Answer:

The spoon appears to be broken because of refraction. Refraction happens when light travels from one medium to another and changes speed and bends. This also causes objects to look different sizes and shapes when they are submerged in water.

Explanation:

To solve this, we must know the concept behind refraction. Therefore, due to refraction, the spoon handle look broken where it enters the surface of the water.

Refraction is the bending of a wave as it travels through different media. The two materials' different densities are what lead to the bending. Anytime a light beam enters a material with a differing refractive index at an angle, it refracts. This increase in speed causes a shift in direction.

Due of refraction, the spoon seems to be shattered. When light moves from one medium to another, its speed and direction shift, causing refraction. When items are submerged in water, this also makes them appear to be of varied sizes and forms.

Therefore, due to refraction, the spoon handle look broken where it enters the surface of the water.

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Answer:

true

Explanation:

A polyatomic ions is the combination of same kind or different kind of elements with a single charge as a whole . Hence, the statement is true.

What is a polyatomic ions?

A polyatomic ions is a group of elements joined together and possess a single charge as a whole. For example NH₄+. Here, nitrogen with four hydrogens forms a covalent bond with one unit of positive charge as a whole remains.

Polyatomic ions either three or more contains same or different kinds of elements. In the case of CO₃²⁻ , the carbonate ion contains 4 atoms and 2 units of negative charge which is possessed by the whole group.

Similarly, NO₃⁻, SO₄²⁻ etc are other examples of polyatomic ions. They are formed by gaining or losing electrons from their acidic or basic forms. Therefore, the statement is true.

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Given, the amount of dextromethorphan HBr present in the cough syrup is 0.09 g per fluidounce.

To find the amount of mL of this agent presents in each teaspoonful dose, we will convert fluidounce to mL.

Let's begin with the conversion,1 fluidounce = 29.5735 mLTo find the amount of mL of dextromethorphan HBr present in each teaspoonful dose,

we will use the formula, Amount of mL of this agent = (Amount of dextromethorphan HBr * Volume of fluidounce) / Total volume= (0.09 * 29.5735) / 1 = 2.6626 mL.

Hence, the amount of mL of dextromethorphan HBr present in each teaspoonful dose is 2.6626 mL.

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Answer:

????????????????????????????????????????????????????????/

Explanation:

H2 and 02​ are the products of this chemical reaction because of the splitting of water molecule.

The products of this chemical reaction are H2 and 02​ because when the water molecule dissociates or splits hydrogen and oxygen molecules are formed. We know that water is produced from the combination of hydrogen and oxygen.

So we can conclude that H2 and 02​ are the products of this chemical reaction because of the splitting of water molecule.

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A ball held at 3 metres

Explanation:

Because it is in motion.

Answer:d orbitals

Explanation: just trustme

Orbitals are defined as the mathematical function used to identify the probability of an electron of an atom in a specific region. The orbitals are s, p, d, and f.

The correct statement for the given blank is:

For d orbitals, 2 lobes have positive signs while the other 2 have negative signs, showing that the opposite lobes have the same sign.​

D-orbitals have 5 lobes, in which two lobes have positive signs and 2 lobes have negative signs.

The orbitals have positive and negative signs, as they represent the positive displacement of the wave, whereas negative displacement (down) of the wave is represented by the negative sign.

Therefore, the correct answer is d-orbitals.

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Answer:

The correct answer is - C. 0.500 mg.

Explanation:

In this case, the half-life of the iodine-131 is 8 days and the initial amount is given 4 mg. According to this after every 8 days, half of the initial value of the iodine-131 remains only.

8 days or 1st half-life = A(i)* 1/2

16 days or two half-life = A(i)* 1/4

24 days or three half-life = A(i)* 1/8

and the remaining amount A would be

= A(i)*1/2^n

= 4 * 1/2^3

= 4 *1/8

= 0.500 mg