A student connects a battery to a wire and wraps the wire around an iron nail to produce an electromagnet. Which action

should the student take to increase the number of paper clips the electromagnet can pick up?


He should replace the iron nail with a plastic spoon.


He should add another battery.


He should decrease the current through the wire


He should reduce the number of turns

Answer:

think the answer is PH3

Explanation:

The most charged oxygen atom that exists in the molecule of water (H2O) is covalently joined to hydrogen. As a result, the hydrogen nucleus on one water molecule interacts with that of oxygen on another water molecule via a dipole.

Hydrogen ties form between nearby oxygen and hydrogen atoms liquid adjacent water molecules in this instance of water. A bond called a hydrogen bond, it is generated via an attraction among two water molecule molecules.

Water exhibits H-bonding because it includes oxygen. Because hydrogen bonds are not present in the acid hydrochloric, it lacks oxygen, nitrogen, and fluorine. Therefore, option (d) — hydrochloric acid — is the correct response.

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Answer:

Mass of hydrogen produced is 0.07g.

Explanation:

Given data:

Mass of magnesium = 7.73 g

Mass of water = 1.31 g

Reaction yield = 88.2%

Mass of hydrogen produced = ?

Solution:

Chemical equation:

Mg + 2H₂O     →   Mg(OH)₂ + H₂

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 1.31 g / 18 g/mol

Number of moles = 0.07 mol

Number of moles of magnesium:

Number of moles = mass/ molar mass

Number of moles = 7.73 g / 18 g/mol

Number of moles = 0.43 mol

Now we will compare the moles of water and magnesium with hydrogen.

                    Mg            :           H₂

                     1               :            1

                    0.43          :          0.43

                    H₂O          :             H₂

                      2             :              1

                   0.07           :            1/2×0.07 = 0.035

Mass of hydrogen:

Mass = number of moles × molar mass

Mass = 0.035 mol × 2 g/mol

Mass = 0.07  g

Answer: 0.064 grams is the answer

Explanation:

at the end you must multiply 88.2/100*0.073=0.064

Answer:

It's well Explained below.

Explanation:

First of Excess product of CaCO_3 would be produced due to the fact that there would not be enough CaCl_2 to react with Na_2•CO_3. The main purpose of having stoichiometric quantities is for us to know the correct amount or near the correct amount of each reactant in order to create a product that will be close to the theoretical amount and thus have a higher percent yield.

A physical change is a change from one state of matter to another; a chemical change results in the formation of a new substance.

Examples of physical changes include changes in the composition or size of materials. Physical changes include changes from one state to another, for as going from a solid to a liquid or a liquid to a gas. Some of the processes that result in physical changes are cutting, bending, dissolving, freezing, boiling, and melting.

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The results of electroplating with the coin give will give us the necessary coating of the required metal for the coin.

Let us make a copper coin. The first step is to prepare a copper sulfate solution. This solution is used in the process of electroplating. To make the solution, take copper sulfate crystals and add them to water. The amount of water and copper sulfate used will depend on the size of the coin that you are trying to electroplate.

A good rule of thumb is to use 1 gram of copper sulfate for every 100 mL of water. Once the solution is made, you will need to connect the positive lead of a power source to the coin that you are trying to electroplate.

The negative lead of the power source should be connected to a piece of copper that is placed in the solution. When the power is turned on, the copper sulfate solution will cause the copper to be deposited onto the coin.

The process of electroplating can take anywhere from a few minutes to a few hours, depending on the size of the coin and the strength of the power source.

As a result, the coin would be coated with the required metal. Here we have used copper, so the coin will turn into a copper coin.

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Answer:

∆o

Explanation:

Usually, the d level consists of a set of five degenerate d orbitals. These orbitals rema degenerate until the approach of ligands.

When ligands approach, the d orbitals are split into higher energy eg and lower energy t2g orbitals.

There exists an energy difference between this t2g and eg levels. This energy difference is called the octahedral crystal field splitting denoted as ∆o.

Answer:

%N = 25.94%

%O = 74.06%

Explanation:

Step 1: Calculate the mass of nitrogen in 1 mole of N₂O₅

We will multiply the molar mass of N by the number of N atoms in the formula of N₂O₅.

m(N): 2 × 14.01 g = 28.02 g

Step 2: Calculate the mass of oxygen in 1 mole of N₂O₅

We will multiply the molar mass of O by the number of O atoms in the formula of N₂O₅.

m(O): 5 × 16.00 g = 80.00 g

Step 3: Calculate the mass of 1 mole of N₂O₅

We will sum the masses of N and O.

m(N₂O₅) = m(N) + m(O) = 28.02 g + 80.00 g = 108.02 g

Step 4: Calculate the percent composition  of N₂O₅

We will use the following expression.

%Element = m(Element)/m(Compound) × 100%

%N = m(N)/m(N₂O₅) × 100% = 28.02 g/108.02 g × 100% = 25.94%

%O = m(O)/m(N₂O₅) × 100% = 80.00 g/108.02 g × 100% = 74.06%

IUPAC (International Union of Pure and Applied Chemistry) naming is also known as systematic naming.

It is a set of rules and guidelines used to name chemical compounds systematically. It provides a standardized method for naming organic and inorganic compounds based on their molecular structure and composition.

The longest continuous carbon chain in the compound is identified as the parent chain.

The IUPAC name of the given compounds are:

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To demonstrate that material is neither created nor destroyed throughout the chemical, the quantity of particles or mass with in donor ends must match the number the bits of weights in the final sides.

Protons, protons, and particles are three incredibly small subatomic particles that make up an atom. The nucleus, which is made up of protons and neutrons, sits in the middle of an atom, and an electron cloud flies around it.

According to the rule of conservation of masses, masses can change from one form to another but are neither generated nor destroyed.

It simply indicates that the reactant and product masses in a nuclear reaction will be equal.

A equation must be balances in order to follow the rule of conservation of mass. Therefore,

Mg(OH)₂ + 2HNO₃ → Mg(NO₃)₂ + 2H₂O

Therefore, the quantity of atoms or bodies in the reactor sides must match the quantity of atoms or mass in the product sides in order to show why matter is neither generated nor deleted in the chemical process.

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Answer:

An apple.

A person.

A table.

Air.

Water.

A computer.

Paper.

Iron.

Hope this helps you

Answer:

your boddy is made of mater and a clock too it is still a mater of time.

Explanation:

The statement that is true about magnets is ''Similar poles of a magnet repel each other.''

All magnets have both north and south poles. Opposite poles attract each other, whereas the similar poles repel each other. When you rub a piece of iron along a magnet, this force creates a magnetic field.

So we can conclude that The statement that is true about magnets is ''Similar poles of a magnet repel each other.''

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Answer:

18.015

Explanation:

Using the periodic table of the elements to find atomic weights, we find that hydrogen has an atomic weight of 1, and oxygen's is 16. In order to calculate the molecular weight of one water molecule, we add the contributions from each atom; that is, 2(1) + 1(16) = 18 grams/mole.

Answer:

A. Ba

Explanation:

Atomic radius increases as you go down and decreases as you go right.

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

The volume of the given gas is 5.35 L.

Here we use the combined gas law viz. P1V1/T1 = P2V2/T2, which is  derived from the ideal gas equation PV = nRT, where

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature.

Here,

\($P_1\) = 1.40 atm, \($P_ 2\)= 0.989 atm  

\($V_1\) = 3.70 L, \($V_2\) = ?

\($T_1\) = 12.20°C = (12.20 + 273) K = 285.2 K  

\($T_2\) = 20.80°C = (20.80 + 273) K = 293.8  K

substituting the values in the equation  P1V1/T1 = P2V2/T2, we get,

(1.40 x 3.70)/285.2 = 0.989 x \($V_2\)/293.8

\($V_2\) = (1.40 x 3.70 x 293.8) / (285.2 x 0.989)

\($V_2\) = 1521.884 / 284.211

\($V_2\) =5.35 L

Thus, the volume of the gas is 5.35 L.

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Answer:

When electrons move to a lower energy level.

Explanation:

Ph 2 will ahve more strength due to the fact that its more acidic compared to pH 5.

the lower the number of a pH, the more it is heading towards being acidic, but the higher the number, the more it heads towards being an alkali. here is a ppt i made along time ago. hope it can help you . have a nice day

Answer:

solusoin ( 0.0130 )²

Explanation:

The next step Meg should take in applying the scientific method to discover the reasons for the hot pavement is B. Ask questions. Option B

Asking questions is a crucial step in the scientific method because it allows for the formulation of a hypothesis and the design of experiments to test that hypothesis. By asking questions, Meg can begin to explore the possible factors contributing to the hot pavement and formulate hypotheses to explain the phenomenon.

In this case, Meg can ask questions such as:

Why is the pavement so hot?

Does the pavement always feel hot after swimming?

Is the temperature of the pavement affected by the weather conditions?

Are there specific materials or colors used in the pavement that may contribute to its heat absorption?

These questions will help guide Meg in her investigation and provide a starting point for gathering more information and designing experiments to test her hypotheses.

Once Meg has formulated her questions, she can move on to the next steps of the scientific method, which include making observations, analyzing data, conducting experiments, and communicating the results.

These subsequent steps will allow her to gather data, analyze it, and draw conclusions based on evidence, leading to a better understanding of the factors contributing to the hot pavement. Meg can then communicate her findings to others, furthering scientific knowledge and potentially finding solutions to mitigate the problem.

Option B

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Rough ER is connected to the nuclear membrane and is responsible for the synthesis and processing of proteins.

The rough endoplasmic reticulum (ER) is a network of membrane-bound sacs and tubules that is studded with ribosomes on its surface. These ribosomes are responsible for protein synthesis. The rough ER is connected to the nuclear membrane because it receives instructions for protein synthesis from the DNA in the nucleus. This connection allows for the efficient transfer of genetic information from the nucleus to the rough ER.

Once the ribosomes on the rough ER synthesize proteins, the rough ER is also involved in the processing and modification of these proteins. It helps in folding the newly synthesized proteins into their functional three-dimensional shapes and also adds various modifications such as glycosylation (the addition of sugar molecules) or signal sequences that target the proteins to specific locations within or outside the cell.

After processing, the proteins may be transported to other parts of the cell or exported to the cell membrane or extracellular space. The connection between the rough ER and the nuclear membrane ensures a coordinated flow of genetic information and protein synthesis, allowing the cell to efficiently carry out its functions.

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Answer

Alcohol

Explanation

Alcoholic fermentation is a biochemical process in which yeast and some kinds of bacteria convert sugars into ethyl alcohol and carbon dioxide.

The atomic weight of Aluminum (AL) is 26.98. It has 14 neutrons. Aluminum has  an atomic number 13. Therefore, option B is correct.

The atomic number of an element represents the number of protons in the nucleus of its atoms. Since the atomic number of an element is unique and determines its position in the periodic table, aluminum has an atomic number of 13.

The number of electrons in a neutral atom is equal to the number of protons, which in this case is 13. Therefore, aluminum has 13 electrons.

The atomic weight of aluminum (Al) is 26.98, which represents the weighted average mass of all the naturally occurring isotopes of aluminum, taking into account their relative abundances. The number of neutrons in an atom of aluminum is given as 14.

Thus, the correct option is B.

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Answer:

the boiling point of solution at 3 decimal point is 100.329०C Ans.

Explanation:

given data -

molality of Nacl = 0.321 m

molal boiling point elevation constant (Kb) =0.512०C/m

# formula of change of boiling point of sample =

∆ Tb =i × Kb × m

Kb = molal boiling point of elevation constant

m = molality

i = vont's hoff factor.

Nacl is strong electrolyte and its 100% dissociate so the value of i for Nacl is 2

put value in the formula

∆ Tb = 2 × 0.512 ०C/m × 0.321m

= 0.3287

= 0.329०C

∆Tb = T'b - Tb

T'b = boiling point of solution

Tb= boiling point of solvent( water)

0.329०C = T'b - 100०c ( boiling point of water = 100०C)

T'b = 0.329०C + 100०C

= 100.329०C

hope this helps

The order of acidity of the protons that is correct is option B.

We must look into the reason  for the acidity of the hydrogen atoms if we want to get the real answer to the question that we have here. We have to note that the hydrogen atom that is closest to the place where there is an electron withdrawing group would be most acidic.

This implies that the hydrogen atom that is close to the highly electron withdrawing carboxyl group would be quite more acidic that an alkane hydrogen.

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The complete product and balance equation is-

a. Fe + 2HCl → FeCl2 + H2      b. Ni + 2HOH → Ni(OH)2 + H2

c. 2Ag + 2HCl → 2AgCl + H2    d. K+ + HOH → KOH + H2

Products are substances that remain after a reaction. A chemical equation that is balanced has the same number of each type of atoms on both sides of the equation. Subscripts are a component of the chemical formulae for the reactants and products that show how many atoms of the previous element there are in each.

Here are the procedures: Count the atoms on each side first. Next, alter one of the compounds' coefficients. Third, count the atoms once more, and then repeat steps two and three until the equation is balanced.

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Reactions are balanced by equating the right and the left side by stoichiometry coefficients. The redox reactions are balanced and corrected by simplifying the numbers.

A redox reaction is a depiction of the oxidation and the reduction of the reaction that shows the loss and the gain of the electrons by the chemical species.

The oxidation half-reaction:

Mg  →  Mg²⁺ + 2e⁻

The reduction half-reaction:

2Au + 2 e⁻ → 2 Au

The overall balanced reaction is:

Mg(s) + 2Au⁺ (aq)  → Mg²⁺ (aq) + 2Au(s)

Therefore, the reaction is balanced by the oxidation and the reduction halves.

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Answer:

Monosaccharides. Carbohydrates are the most abundant biomolecule on Earth. Living organisms use carbohydrates as accessible energy to fuel cellular reactions and for structural support inside cell walls. Cells attach carbohydrate molecules to proteins and lipids, modifying structures to enhance functionality.

Explanation:

Answer:

The dependent variable would be the whitening of the teeth of the participants.

Explanation: