Lacie is riding her bicycle at a velocity of 5 m/s, her mass is 50kg. What is her kinetic energy?

Grinding the calcium hydroxide to a finer powder would speed up the collisions.

The reaction between calcium hydroxide and carbon dioxide to produce calcium carbonate is a slow process that requires the collision of calcium hydroxide and carbon dioxide molecules. In order to speed up the reaction rate, one approach is to increase the surface area of calcium hydroxide by using it in a powdered form, which increases the number of collisions with carbon dioxide molecules. Another way is to increase the concentration of carbon dioxide by pumping it into the reaction chamber at a higher pressure, which increases the number of collisions with calcium hydroxide molecules. Additionally, raising the temperature of the reaction can increase the kinetic energy of the molecules and promote collisions, leading to a faster reaction rate. Using a catalyst, such as a small amount of sodium chloride, can also enhance the reaction by lowering the activation energy needed for the reaction to occur. These approaches can help speed up the production of calcium carbonate from the reaction between calcium hydroxide and carbon dioxide.

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Answer:

the ability to be reproduced or copied.

Explanation:

Answer:  the ability of an entire experiment or study to be reproduced, either by the researcher or by someone else working independently.

Answer:

The ratio between 1 and 2 half lives that have elapsed since the mineral contained 100% parent atoms.

Let us consider that the parent isotope decays into the daughter isotope through a process of radioactive decay with a constant half-life.

we can use the fact of the half life which is the proportion of parent to daughter isotopes which changes over the time. We have to determine that how many half-lives have elapsed since the mineral contained 100% parent atoms.

We have the proportion of parents to daughter isotopes in the mineral is 40% parent and 60% daughter. So the ratio becomes 2:3 parent to daughter isotopes.

Calculating the current ratio of 2:3 is closest to the ratio of 1:3 which occurs after two half-lives of the mineral. So we get the ratio between 1 and 2 half-lives which have elapsed since the mineral contained 100% parent atoms.

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The step(s) that compose rationale for the cation Ag+ being absent in an unknown (but Pb+2 is present) are:

Step 1 involves adding KCl and HCl to the unknown solution, which should result in the formation of white precipitates of AgCl and PbCl2 if Ag+ and Pb+2 are present.

The absence of a white precipitate in step 1-A suggests that Ag+ may not be present, and this is supported by the fact that the precipitate dissolves in hot water, indicating it is not AgCl, which is insoluble in water.

In step 1-B, the addition of H2S produces a black precipitate of PbS, indicating the presence of Pb+2. The absence of a black precipitate in step 1-B also suggests that Ag+ may not be present.

Step 1-C involves adding K2CrO4 to the unknown solution to test for the presence of Pb+2, which should result in the formation of a yellow precipitate of PbCrO4. The absence of a yellow precipitate indicates that Pb+2 may not be present.

Step 2-B involves adding NH3 to the unknown solution, which should result in the formation of a dark blue solution if Ag+ is present. The absence of a dark blue color suggests that Ag+ may not be present.

The remaining steps (4, 5, 6, 7) involve the use of additional reagents to further differentiate between Ag+ and Pb+2. For example, the addition of KFe(CN)6 to the unknown solution should result in the formation of a reddish-brown precipitate if Ag+ is present, but not if Pb+2 is present.

Overall, by observing the results of these specific reactions with various reagents, it is possible to determine the presence or absence of specific cations in the unknown solution. In this case, the results suggest that Pb+2 is present, but Ag+ is not.

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Answer:

the double carbon to oxygen bond

Answer:

The correct answer is B. 1-propanamine.

Explanation:

Amines can form hydrogen bonds with water molecules, which makes them soluble in water. The more hydrogen bonding sites an amine has, the more soluble it will be in water.

Out of the given options, 1-propanamine has only one carbon chain, which allows it to form more hydrogen bonds with water molecules compared to amine molecules with longer carbon chains. Also, it does not have any other functional groups that could interfere with hydrogen bonding. Therefore, 1-propanamine would be the most soluble in water.

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The half-life of this reaction, assuming first-order kinetics, is approximately 60.6 min.

To determine the half-life of a reaction assuming first-order kinetics, we can use the formula for the decay of a substance:

\(ln(\frac {N_t}{N_0}) = -kt\)

where \(N_t\) is the remaining amount of the compound at time t, \(N_0\) is the initial amount of the compound, k is the rate constant, and t is the time.

Given that 26.0% of the compound has decomposed after 42.0 min, we can calculate the remaining amount of the compound:

\(\frac {N_t}{N_0} = 1 - 26.0 \% = 0.74.\)

Plugging this value into the equation, we have

ln(0.74) = -k(42.0 min)

To find the half-life (\(t_{1/2}\)), we can rearrange the equation to isolate the rate constant:

k = -ln(0.74) / 42.0 min.

To find the half-life, we can rearrange the equation for first-order decay:

\(t_{1/2} = ln(2) / k.\)

Substituting the value of k we obtained earlier, we have

\(t_{1/2}\)\(=\frac { ln(2)}{(-ln \frac {(0.74)}{42.0 min})}.\)

Evaluating this expression, we find

\(t_{1/2} \approx 60.6 min.\)

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Answer:a mouse

Explanation:

Answer: a mouse

Explanation:

Answer:

1.2353 mol

Explanation:

After two half-lives have passed, 200,000 atoms would remain. The half-life of a radioactive substance is the amount of time it takes for half of the substance to decay.

First, we need to understand what a half-life is. The half-life of a radioactive substance is the amount of time it takes for half of the substance to decay. So, after one half-life has passed, half of the original substance will remain, and half will have decayed.

For example, if you start with 800,000 atoms and the half-life of the substance is 10 days, after 10 days you would have 400,000 atoms remaining and 400,000 would have decayed.

After two half-lives have passed, we can apply the same logic. If the half-life of the substance is 10 days, then after 20 days (2 x 10 days), two half-lives have passed.

So, starting with 800,000 atoms:

- After one half-life (10 days), you would have 400,000 atoms remaining
- After two half-lives (20 days), you would have 200,000 atoms remaining

Therefore, after two half-lives have passed, 200,000 atoms would remain.

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Assuming the quantity of current passing through the zinc and copper electrolytes is the same, mass of Zinc deposited is (x/64) × 65.0 g.

Electrolysis is the decomposition of a substance known as an electrolyte when electric current is passed through its solution or molten form.

The mass of an electrolyte deposited when current is passed is dependent on the current and the charge on the ion.

In the electrolysis of copper and zinc, assuming the quantity of current passed through their solution are the same, the moles of each zinc and copper deposited will be the same since the charges on their ions are the same.

Assuming x g of copper is deposited.

molar mass of copper = 64.0 g

molar mass of Zinc = 65.0 g

moles of copper deposited = x/64

moles of zinc deposited = x/64

mass of Zinc deposited = (x/64) × 65.0 g

Therefore, the mass of Zinc deposited is (x/64) × 65.0 g.

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By using stoichiometry and considering the molar ratios from the balanced chemical equation, we find that reacting 15.8 g of H2 with excess oxygen will produce 141 g of water. 141 g.option A.

In the balanced chemical equation 2H2 + O2 → 2H2O, it is stated that two moles of hydrogen gas (H2) react with one mole of oxygen gas (O2) to produce two moles of water (H2O). Since the molar mass of water is approximately 18 g/mol, we can calculate the amount of water produced by converting the mass of hydrogen gas to moles and then using the mole ratio from the balanced equation.

To find the moles of hydrogen gas, we divide the given mass (15.8 g) by the molar mass of hydrogen (2 g/mol), which gives us 7.9 moles of H2. According to the balanced equation, each mole of H2 produces two moles of H2O. Therefore, 7.9 moles of H2 will produce 2 * 7.9 = 15.8 moles of H2O.

Finally, we convert the moles of water to grams by multiplying the moles (15.8) by the molar mass of water (18 g/mol), which gives us 284.4 g. However, we need to remember that the given reaction has excess oxygen, meaning all the hydrogen will react. Therefore, the limiting reactant is not hydrogen but oxygen.

Consequently, the amount of water produced will be based on the number of moles of oxygen. Since there is excess oxygen, we can assume that the moles of oxygen consumed are equal to the moles of hydrogen reacted. Therefore, the correct answer is 15.8 moles * 18 g/mol = 141 g.option A.

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It is inappropriate that Ingestion of a toxic substance is the only way a poisoning can occur.

A poison can be any substance that is harmful to the body. It can be swallowed, inhaled, injected or absorbed through the skin. Poisoning is the harmful effect that occurs when too much of that substance has been taken. Poisoning is not to be confused with envenomation.

Acute poisoning is exposure to a poison on one occasion or during a short period of time. Symptoms develop in close relation to the degree of exposure. Absorption of a poison is necessary for systemic poisoning (that is, in the blood throughout the body)

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Answer:

neutrons have a neutral charge​

Explanation:

What make them neutral. It means why do we say that they are neutral. The American polymath benjamin Franklin named the charges as positive and the negative. He did this because when one kind of charges are combined they increase their effect but when the same kind was mixed with the other charges the charges used to disapear or loss their strength . so it was clear that there are two types of charges and have got a methametical relation between them . He called them posive and negative charges analogous to positive and negative numbers because when negative numbers are added with the negative number we get a larger negative numbers and vice versa. So it means that every object that we can observe contain charge but of both kinds in same quantity so we call them neutral . so answer to that question would be that it has charge because charge is the fundamental property of particles but it has both +ve and -ve charges equal in magnitude so not any net charge is there on neutron it is in equilibrium.

The complete combustion of any hydrocarbon produces carbon dioxide and water as the products. During the process, the hydrocarbon reacts with oxygen in the presence of heat or light to produce these products.

The chemical reaction involved in the combustion of hydrocarbons is exothermic, which means that it releases heat energy.

For example, if we consider methane, the simplest hydrocarbon with one carbon atom and four hydrogen atoms, its combustion equation is given as:

CH4 + 2O2 -> CO2 + 2H2O

In this reaction, methane reacts with oxygen to form carbon dioxide and water as the only products. The same process applies to other hydrocarbons like ethane, propane, and butane.

The combustion of hydrocarbons is an important process used in various applications, including energy production, transportation, and heating. However, incomplete combustion can also occur, leading to the formation of harmful byproducts like carbon monoxide and particulate matter, which can be detrimental to human health and the environment.

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Number of moles of sodium sulfate is 0.633 mol.

Given,

volume of solution= 45mL

molarity of soultion = 2.00 mol/L

we have to find number of moles of sodium sulfate.

Molar mass of sodium sulfate = 142

Number of moles of Na2SO4 = (Molarity of Na2SO4 × volume of the solution) / molecular mass of Na2SO4.

No. of moles of H2SO4 = (2 × 45) / 142 = 0.633 mol

Therefore, number of moles of sodium sulfate in solution is 0.633

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Reactive intermediates may not necessarily be consumed in the following phase and can take part in other reactions to make other products, thus the statement "reactive intermediates are produced in one step.

The series of fundamental processes via which a chemical reaction takes place is known as a reaction mechanism. A multistep or complicated reaction is one that involves two or more simple processes. A chemical species that is produced in one fundamental stage of a reaction and destroyed in the next is referred to as an intermediate.

A basic set of reactions known as elementary steps or elementary reactions illustrate the progression of a reaction at the molecular level. The series of simple stages that together make up a full chemical reaction is known as a reaction mechanism.

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Answer/Explanation:

Aluminum and oxygen

Fluorine and oxygen

Ionic compounds are formed when any type of metal is combined with a non-metal such as carbon, nitrogen, oxygen, sulfur, phosphorus, and selenium.

(any)metal + nonmetal = ionic compound

Any type of metal may join with a non-metal, such as carbon, nitrogen, oxygen, sulfur, phosphorus, and selenium, to create ionic compounds.

A chemical compound known as an ionic compound is one that contains ions bound together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the molecule is generally neutral.

In most cases, ionic compounds are created between metal and nonmetal components. For instance, the ionic compound calcium chloride is made up of the metal calcium (Ca) and the nonmetal chlorine (Cl) (CaCl2).

A nonmetal and a metal can create an ionic bond, which is the attraction between two ions with opposing charges.

Thus, metal are joined with a non-metal, such as carbon, nitrogen, oxygen, sulfur, phosphorus, and selenium, to create ionic compounds.

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According to the electron sea model, the melting points of metals are not as extreme as the boiling points. Therefore, the given statement is correct is true.

The Electron Sea Model's whole hypothesis relies around the behavior of atoms throughout this bonding. The movement of unpaired electrons between positively charged metal ions in a mesh is known as metallic bonding.

According to the electron sea model, the melting points of metals are not as extreme as the boiling points. This is because the cations and electrons are - in a metal. It does not take much energy for a solid to become liquid. But metallic bonds are very - , so it does require a lot of energy to separate atoms from the cations in their sea of electrons. This statement is true.

Therefore, the given statement is correct is true.

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Answer:

B

Explanation:

mixing sodium hydroxide with hydrochloric acid to form table salt

Answer:

i need points

Explanation:

becuase

Answer: 29.3

Explanation:

22÷9=2.44444444

2.44444444×12=29.333333333

The molecular shape of SCl₂ is bent or V-shaped.

It is bent because it has a central sulfur atom bonded to two chlorine atoms, and the lone pairs of electrons on sulfur repel the bonded pairs, causing the molecule to adopt a bent shape. This is based on the concept of molecular geometry, which describes the arrangement of atoms and lone pairs around a central atom.

Here's how to know the molecular shape of SCl₂:

1. Determine the central atom: In SCl₂, the central atom is sulfur (S).
2. Count the total number of valence electrons: Sulfur has 6 valence electrons and each chlorine (Cl) has 7. Therefore, the total valence electrons are 6 + (2 × 7) = 20.
3. Arrange the atoms and distribute the valence electrons: Place the central atom (S) in the center and connect it to the two chlorine atoms using single bonds. Each bond uses 2 electrons, so 4 electrons are used.
4. Distribute the remaining electrons: The remaining 16 electrons can be placed as lone pairs. Sulfur has 2 lone pairs and each chlorine atom has 3 lone pairs.
5. Determine the electron geometry: The electron geometry of SCl2 is tetrahedral, as it has 4 electron groups (2 bonds and 2 lone pairs).
6. Determine the molecular shape: Since there are 2 lone pairs on the central atom (S), the molecular shape of SCl₂ is bent.

Therefore,  the molecular shape of SCl₂ is bent or V-shaped.

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Answer:

The bowling ball with mass 8 pounds has greater acceleration.

Explanation:

The acceleration on the objects is equal to the quotient of the force applied on it and its mass. From Newton's second law of motion, we have;

F = ma

where F is the force on the object, m is its mass and a is its acceleration.

⇒ a = \(\frac{F}{m}\)

Let us assume that a force of 50 N was applied on the two bowling balls.

Thus;

mass of the first bowling ball = 8 pounds = 3.62874 kg

So that,

50 = 3.62874 x a

a = \(\frac{50}{3.62874}\)

  = 13.779

The acceleration of the first ball is 13.78 m/\(s^{2}\).

For the second ball of mass = 13 pounds = 5.8967 kg

So that,

50 = 5.8967 x a

a = \(\frac{50}{5.8967}\)

  = 8.4793

The acceleration of the second ball is 8.48 m/\(s^{2}\).

Therefore, the bowling ball with mass 8 pounds has greater acceleration.

Answer:

The answer is absolutely D!

Jellyfish do have a digestive system because they eat a ton so A is not true

Jellyfish CAN survive in fresh water because they can be kept in fresh water aquariums so B is not true

Jellyfish ARE made of cells because it is a living creature and that is all the proof you need XD so C is also not true

That leaves you with your answer: D

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{4.88 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.88}{6.02} \\ = 0.810631229...\)

We have the final answer as

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1. The atom that has five shells and seven valence electrons is Iodine.

The atomic number of Iodine is 53, having the electronic configuration of 2,8, 18, 18, 7. Iodine thus has 5 shells and 7 valence electrons.

2. Comparison of Ar and Cl

a) Cl has a greater force of attraction- Cl has 7 electrons in the valence shell thus to obtain the noble gas configuration it attracts the electrons.

b) Ar has greater ionization energy- Ionization energy increases along a period.

c) Ar is better at keeping its electrons- Argon is a noble gas and thus has a stable electronic configuration.

d) Ar is better at keeping its electrons- Argon is a noble gas and thus has a stable electronic configuration.

3. Comparison of N and P

a) N has the greater force of attraction- N is smaller than P thus the force of attraction is greater.

b) N has greater ionization energy- ionization energy decreases down the group.

c) N is better at keeping its electrons- due to the smaller size of nitrogen.

d) N is better at keeping its electrons- due to the smaller size of nitrogen.

1) The atom that has five shells and seven electrons is chlorine.  Chlorine has a greater force of attraction. The ionization energy is one of the periodic trends in the table.

We know that the periodic table has to do with the arrangement of the elements and the way that the elements have been arranged would have a lot to do with the chemical properties of the elements.

Let us note that elements have been arranged into groups and periods. The groups are the vertical columns while the periods are the horizontal rows that we can find in the periodic table as we can see it.

Finally;

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Light energy is used in photosynthesis to convert carbon dioxide and water into glucose and oxygen. 1 glucose molecule and 6 oxygen molecules are produced for every 6 carbon dioxide and 6 water molecules.

C₆H₁₂O₆ is the chemical formula for glucose, a simple sugar. When a glucose molecule is assembled during photosynthesis, it absorbs 12 hydrogen ions from the chloroplast stroma. Reactants in photosynthesis include oxygen, carbon dioxide, ATP, and NADPH. Water and GA3P are both products. Chlorophyll, water, and carbon dioxide are reactants in photosynthesis. When the process is finished, photosynthesis produces oxygen and carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy required by living things to survive.

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