write a balanced nuclear equation for the following: the nuclide thallium-209 undergoes beta emission.

Answer:

People filter their faucet water to purify it further and to filter out any sediment in the water. It's also to improve taste and remove contaminants and thereby reducing risk of drinking unhealthy tap water

People sieve flour when baking to break apart any clumps of flour from entering the mix. Clumps of flour make it harder the combine and often result in clumps of dry flour in the finished bake which are unpleasant.

Explanation:

Answer:

0.42mole

Explanation:

Given parameters:

Number of atoms of titanium  = 2.5 x 10²³atoms

Unknown:

Number of moles  = ?

Solution:

To solve this problem, we must understand that a mole of any substance contains the Avogadro's number of particles.

              6.02 x 10²³ atoms makes up 1 mole of an atom

              2.5 x 10²³ atoms will contain \(\frac{2.5 x 10^{23} }{6.02 x 10^{23} }\)   = 0.42mole

The best safety practice that is recommended before leaving the chemistry laboratory is that remove the lab coat,  the goggles and the gloves and wash the hands properly.

The  best safety practice that is recommended before leaving the chemistry laboratory are :

These are the some basic safety practices that is recommended to follow before leaving the chemistry laboratory. Wash the exposed areas. Most of chemicals are toxic , so clean it properly before leaving the lab.

This question is incomplete, the complete question is :

what is the best safety practice recommended before leaving the chemistry laboratory? group of answer choices :

1) remove lab coat

2)  remove goggles and the gloves

3) wash the hands properly.

4) none of the above

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Explanation:

density=mass÷volume

density= 560÷560

density= 1 g/mL

Answer:

Dermal tissue of the stems and leaves is covered by a waxy cuticle that prevents evaporative water loss. Stomata are specialized pores that allow gas exchange through holes in the cuticle. Unlike the stem and leaves, the root epidermis is not covered by a waxy cuticle which would prevent absorption of water.

Explanation:

Answer:

All waves of the electromagnetic spectrum have a speed of 3 × 10⁸ ms⁻¹

Answer:

a) The predominant Brownstead-Lowry acid- base is perchloric acid

b) A conjugate acid base pair is HClO4 and ClO4^-

c) forward reaction is favored and equilibrium position lies towards the far right

Explanation:

The molecular equation is;

HClO4(aq) + NaH2PO4(aq) -----> H3PO4(aq) + NaClO4(aq)

The net ionic equation of the reaction is;

H^+(aq) + H2PO4^-(aq) ----> H3PO4(aq)

The predominant Brownstead-Lowry acid- base is perchloric acid .

A conjugate acid base pair is HClO4 and ClO4^-

Since the both species; perchloric acid and sodium dihydrogen phosphate are both highly soluble in water yielding ions and also dissociate to a large extent in solution, the forward reaction is favoured leading to the formation of phosphoric acid. Remember that phosphoric acid does not easily dissociate in solution hence the forward reaction is faster than the reverse reaction and the equilibrium position lies towards the far right.

Answer:

The fact that there was no driving force or motive mechanism behind the theory of continental drift.

Explanation:

The concept of continental drift was first proposed by Abraham Ortelius in 1596, and further improved on by Alfred Wegener in 1912. The theory proposes that the earth's continents have moved across the ocean bed. The continents also move with geologic time relative to each other. The concept was not accepted by scientists because there was no driving force or motive mechanism to explain the theory.

A scientist named Alfred  Holmes, came up with the mantle convection theory which explains that the slow motion of the earth was caused by convection currents. This explanation was still not satisfactory to scientists. Today, the theory of plate tectonics has gained more acceptance than the theory of continental drift.

Answer:

12.01 grams per mole

Explanation:

theres no sample or example so if theres grams of Carbon, convert it to moles using 12.01g/mol

We can see here that when compared to sulfuric acid, carboxylic acids are weaker acids.

Sulfuric acid is a strong, highly corrosive acid with the chemical formula \(H_{2} SO_{4}\). It is one of the most important and widely used industrial chemicals. Sulfuric acid is known for its strong acidic properties and is often referred to as the "king of chemicals" due to its widespread applications in various industries.

Sulfuric acid is a dense, oily liquid that is colorless when pure. It is soluble in water, and when dissolved, it releases hydrogen ions (H+) to make the solution highly acidic.

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a. The work required to lift the fridge of wigs without a machine is 160 Joules. b. The effort force required to lift the fridge of wigs with a lever that has a mechanical advantage of 4 is one-fourth (1/4) of the weight of the fridge.

Work is defined as the energy transferred to or from an object by means of a force acting on the object, causing it to move in the direction of the force.

a. To lift the fridge of wigs without a machine, the clown would need to apply a force of 80 Newtons over a distance of 2 meters. The work done would be given by the formula:

Work = Force x Distance

Therefore, the work required would be:

Work = 80 N x 2 m = 160 Joules

So, the work required to lift the fridge of wigs without a machine is 160 Joules.

b. If the lever has a mechanical advantage of 4, it means that the effort force required would be one-fourth (1/4) of the weight of the fridge of wigs. Since the weight of the fridge is not given, let's assume it to be W Newtons.

According to the principle of the lever, the product of the effort force and its distance from the fulcrum is equal to the product of the load force (the weight of the fridge) and its distance from the fulcrum. Assuming that the effort force is applied at a distance of 0.5 meters from the fulcrum, we can write:

Effort force x 0.5 m = (1/4)W x 2 m

Simplifying the equation, we get:

Effort force = (1/4)W x 2 m / 0.5 m = (1/4)W x 4

Effort force = W Newtons / 4

Therefore, the effort force required to lift the fridge of wigs with a lever that has a mechanical advantage of 4 is one-fourth (1/4) of the weight of the fridge.

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Answer:

C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + H₂O

Explanation:

When a forest burns and all that's left is some ash,  most of the mass of the trees go to the atmosphere, in the form of carbon dioxide.

In a total combustion process of organic matter, the two molecules produced are carbon dioxide and water. (CO₂ and H₂O)

The equation for the combustion of glucose is:

C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + H₂O

Answer:  i think C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + H₂O

Explanation:

Answer:

A. Each type of cell carries out a specific function for the organism.

Explanation:

\(hope\) \(this\) \(helps!\) \(:)\)

The use of fossil fuels and nuclear fuels are used in the extraction of pure water from seawater as it helps to desalinate the water using different types of techniques.

This is referred to as a material which is used in nuclear power stations to produce heat to power turbines.

Small and medium sized nuclear reactors are mostly used during the process of desalination. This is done by the cogeneration of electricity using low-pressure steam from the turbine and hot seawater feed from the final cooling system in this scenario.

The fossil fuel also ensures that electricity is used to power the turbine which is used in the process thereby making it an important aspect in the extraction of pure water from seawater and is the correct choice.

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The greatest wavelength at which a photon may get ionized is 2.294 107 nm. When an atom or molecule acquires or eliminates an energy, the activity of ionization creates ions.

The ionization energy rule is what?

Upon that annual chart, that the very first oxidation number typically climbs towards left to right for each period. The higher nuclear charge results in a closer bond between the outermost electron and the nucleus.

How does ionization work?

Any process by which electrically neutral atoms or molecules are changed into electrically charged atoms or molecules (ions) by the gain or loss of electrons is referred to as ionization in chemistry and physics.

Briefing:

ionization energy= 941kj/mol

ionization energy= 941×1/6.022×10²³

                            =15.62×10⁻²²kj/atom

              E=h∨

               v=15.62×10⁻²²×10³/6.626×10⁻³⁴

                =1.3075×10¹⁰s⁻¹

           λν=c

                  λ=3×10⁸/1.3075×10¹⁰

                   =2.294×10⁻²m

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Answer: yes

Explanation: its common sense

Answer:

by determining or looking up the electron configurations of the main group elements.

Explanation:

The valence electrons participate in chemical reactions. ... You can also find the core and valence electrons by determining or looking up the electron configurations of the main group elements.

i am blind i can't see your question

Answer:

Explanation:

A .

Low pressure is one of the defining features of a hurricane. Therefore, the correct option is option C.

Hurricanes are intense tropical storms with spiralling winds, copious amounts of rain, and storm surges. These storms can pose a variety of issues when they hit land because they often occur over warm ocean waters close to the equator. Hurricanes leave a path of destruction in their wake, wrecking everything in their path from homes and infrastructure to creating severe flooding and landslides. The unpredictable nature of hurricanes is among their most worrisome features. Although modern technology and meteorological techniques have given us improved storm tracking and prediction systems, it is still challenging to correctly anticipate a hurricane's exact route and intensity.

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Answer:

I think its boiling point conductivity

Answer: boiling point

Explanation:

Got it right

Answer:

The ancient Greeks believed that fire was one the four basic elements that composed all things in the universe. In the mythology of virtually every culture, fire is a sacred substance that gives life or power. Fire is not, in fact, a substance. When you gaze at the leaping flames of a campfire, you’re observing not an object, but a process – a chemical reaction. It’s the same chemical reaction that occurs when a cut apple left on the counter turns brown, when silver tarnishes or when an iron nail rusts.

That process is oxidation: combining oxygen with another substance. The defining difference between a fire and your half-eaten apple is speed: fire is an oxidation process that happens very fast, so that light, heat and sound are released — often with enough force and majesty to justify the ancients’ reverence.The sudden release of energy causes temperatures to rise, sometimes by thousands of degrees. And it also results in smoke, the toxic waste of fire’s leftovers.

The fire triangle and the fire tetrahedron

Fire TetrahedronThe fire triangle identifies the three needed components of fire:

fuel (something that will burn)

heat (enough to make the fuel burn)

and air (oxygen)

Explanation: i hope this helps sry its long

A smaller amount of energy is wasted by the incandescent bulb.

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Answer:

5. a. false b. true c. false d. true e. false

6. it has to be something that can be supported or refuted through carefully crafted experimentation or observation

The correct answer is A. stage.

The stage is equipped with mechanical controls or knobs that enable precise movement of the slide in both the x-axis (horizontal) and y-axis (vertical) directions. These controls allow the user to position the area of interest on the slide under the objective lens for examination.

The slide is placed on the stage of an optical microscope. The stage is a flat platform located beneath the objective lenses and above the light source. It serves as a stable platform for holding the specimen or slide being observed.

The stage typically includes a specimen holder or slide holder where the slide is securely placed. This holder ensures that the slide remains in position and allows for easy movement and adjustment of the slide during observation.

The turret, on the other hand, refers to the rotating mechanism that holds the objective lenses. The base refers to the lowermost part of the microscope that provides stability and support to the entire instrument.

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Answer:

Option (A) the solid X is ground to a fine powder.

Explanation:

X(s) + 2B(aq) → X+(aq) + B2(g)

In the reaction above, the rate of the reaction will be highest, when X being a solid is ground to fine powder.

Grounding X to fine powder simply means increasing the surface area of X.

An increase in surface area of reactants will definitely increase the rate of reaction because the particles of the solid will collide with the right orientation and hence speed up the reaction rate.

The value of K_eq for this reaction is approximately 1.805 × 10^-5.

To find the value of the equilibrium constant (K_eq) for the given reaction, we can use the equilibrium concentrations of the species involved. The equilibrium constant expression for the reaction is:

K_eq = [CH3COO-][H3O+] / [CH3COOH]

Given the following concentrations at equilibrium:

[CH3COOH] = 2.0 × 10^-1 M

[CH3COO-] = 1.9 × 10^-3 M

[H3O+] = 1.9 × 10^-3 M

Substituting these values into the equilibrium constant expression, we get:

K_eq = (1.9 × 10^-3)(1.9 × 10^-3) / (2.0 × 10^-1)

K_eq = 3.61 × 10^-6 / 2.0 × 10^-1

K_eq = 3.61 × 10^-6 × 5.0 × 10^0

K_eq = 1.805 × 10^-5

Therefore, the value of K_eq for this reaction is approximately 1.805 × 10^-5.

None of the provided answer choices match this value exactly.

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Answer:

c. The circulatory system moves oxygen throughout the body that is brought in by the respiratory system.

Explanation:

The circulatory system delivers oxygen and nutrients to cells and takes away wastes.

The respiratory system is the network of organs and tissues that help you breathe.

So, of the options, option c is correct.

Hope this helps!

The  statement which  best describes how two body systems work together to maintain homeostasis is that circulatory system moves oxygen throughout the body that is brought in by the respiratory system.

In biology, homeostasis  is the state of steady internal, physical, and chemical conditions maintained by living systems.This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range).

Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium, and calcium ions, as well as the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life.

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Answer:

Negative, because the potential energy of the reactants is higher than the potential energy of the products

Explanation:

Exothermic reaction is a reaction in which heat is released to surrounding. This is due to the fact that the heat content of the reactant is higher than the heat content of product thus producing a negative enthalpy change (ΔH) i.e

Enthalpy change = Heat of product – Heat of reactant

ΔH = Hp – Hr = negative

Considering the options given in the question above, the correct answer is:

Negative, because the potential energy of the reactants is higher than the potential energy of the products