Suppose you discover a chemical that can block leak potassium channels. what might happen as a result of this blockage?

Answer: The nuclide symbol of X is \(^{231}_{90}\textrm{Th}\)

Explanation:

The given nuclear reaction is a type of alpha decay process. In this process, the nucleus decays by releasing an alpha particle. The mass number of the nucleus is reduced by 4 units and atomic number is also decreased by 2 units. The particle released is a helium nucleus.

The general equation representing alpha decay process is:

\(_{Z}^{A}\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\textrm{He}\)

For the given equation :

\(^{235}_{92}\textrm{U}\rightarrow ^{A}_{Z}\textrm{X}+^4_2\textrm{He}\)

As the atomic number and mass number must be equal on both sides of the nuclear equation:

\(^{235}_{92}\textrm{U}\rightarrow ^{231}_{90}\textrm{Th}+^4_2\textrm{He}\)

Thus the nuclide symbol of X is \(^{231}_{90}\textrm{Th}\)

Answer:

D. Superscript 231 subscript 90 upper T h.

Explanation: Just for a short answer

Step 1: Begin with a balanced chemical equation and starting amounts for each reactant.

Step 2: Convert mass of each starting reactants to moles.

Step 3: Calculate the number of moles used for each reactant. is the limiting reagent.

what is limiting reaction?

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Answer:

Styrene has the empirical formula CH, and there is 92.25% carbon and 7.75% hydrogen. The percentage of these parts can be used to determine the molar mass and use the molecular formula.

Explanation:

Answer:  A

Explanation:

Convection is a heat transfer mechanism where heat moves from one place to another through fluid currents. Forced convection is simply using this mechanism in a useful way to heat or cool a home efficiently, such as using a fan.

hope it help pls mark me brainliest

Answer:

Convection is a heat transfer mechanism where heat moves from one place to another through fluid currents. Forced convection is simply using this mechanism in a useful way to heat or cool a home efficiently, such as using a fan.

Explanation:

Transmutation, conversion of one chemical element into another. A transmutation entails a change in the structure of atomic nuclei and hence may be induced by a nuclear reaction (q.v.), such as neutron capture, or occur spontaneously by radioactive decay, such as alpha decay and beta decay (qq. v.).

In living organisms, glucose is the most fundamental kind of fuel. It is soluble in multicellular organisms and is carried by bodily fluids to all cells, where it is digested to release energy.

Organic compounds in chemistry are any chemical compounds that have carbon-hydrogen or carbon-carbon bonds. Millions of organic compounds have been identified as a result of carbon's capacity to catenate. Any of a wide range of chemical compounds in which one or more carbon atoms are covalently connected to atoms of other elements, most typically hydrogen, oxygen, or nitrogen. Carbides, carbonates, and cyanides are among the few carbon-containing chemicals that are not categorized as organic. Because of their relationship with animals and because they include carbon, the chemical components of living things are known as organic substances. Organic chemistry is concerned with organic chemicals, which are substances related with living activities.

Here,

Glucose is the most basic type of fuel in living creatures. It is soluble in multicellular organisms and is transported to all cells via body fluids, where it is digested to release energy.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

The rate of the reaction, 2A+B→C, with zeroth order in A and zeroth order in B, and a rate constant of \(k=0.0739 Ms^{−1} , is 0.0739 Ms^{−1}\).

The rate of the reaction can be determined using the rate law equation and the given concentrations of A and B.

The rate law equation for the given reaction is rate =\(k[A]^x[B]^y\), where [A] and [B] represent the concentrations of A and B, respectively, and k is the rate constant.

In this case, the rate law is zeroth order in A and zeroth order in B, which means that the concentrations of A and B do not affect the rate of the reaction. Therefore, x and y in the rate law equation are both zero.

To calculate the rate, substitute the values into the rate law equation:
rate = \(k[A]^x[B]^y\)
    = \(k[0.20M]^0[0.15M]^0\)
    = k

Given that the rate constant k is 0.0739 \(Ms^{-1}\), the rate of the reaction is also 0.0739\(Ms^{−1}\).

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No, it does not pass the "fat pencil" test. Therefore, a normal distribution is not a reasonable model. Option B is the correct answer.

The "fat pencil" test is a quick visual check to determine if a dataset can be reasonably approximated by a normal distribution. In this case, the pH readings of wastewater show a significant deviation from a normal distribution. The presence of several low pH values (1.0) and a few high pH values (10.0, 10.5, 11.4) indicate a non-normal distribution with skewness and potential outliers. Therefore, it is not reasonable to model these data using a normal distribution.

Option B is the correct answer.

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Answer:

will you help us with that one please

6.32mL of phosphate solution is needed to completely neutralize the lead in this reaction.

A neutralization reaction is defined as the reaction between an strong acid and strong base to produce a salt and water.

The process of the reacting given volume of acids or bases for the determination of the concentration or volume of the acid or base which is required for neutralization is known as titration in volumetric analysis.

The formula used to determine the volume of the acid is given below:

(Ca × Va) /(Cb × Vb) = Na/Nb

where,

where Ca is the concentration of lead nitrate

Cb is the concentration of sodium phosphate

Va is the volume of lead nitrate

Vb is the volume of sodium phosphate

Na is the moles of lead nitrate

Nb is the moles of sodium phosphate

Concentration of lead nitrate = m/V

= 6.931/(0.1 × 331.2)

= 0.0281 M

Ca = 0.222M

Cb = 0.0281M

Na = Nb = 1

Va = ( 0.0281 × 50) /0.222

= 6.32 mL.

Thus, 6.32mL of phosphate solution is needed to completely neutralize the lead in this reaction.

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The continuous evolution of the atomic model is beneficial because it allows for a better understanding of the structure and behavior of atoms. By incorporating both old and new ideas, we can build upon the knowledge and insights gained from previous models while also incorporating new experimental evidence and advancements in scientific understanding.

One reasoning to support this claim is that the old models, such as Dalton's atomic theory or Thomson's plum pudding model, laid the foundation for our understanding of atoms. They provided valuable insights into the basic properties and behavior of atoms. However, as scientific techniques improved and new evidence emerged, these models were found to have limitations.

For example, Rutherford's gold foil experiment led to the discovery of the atomic nucleus, which was not accounted for in the previous models. This new finding required a modification of the existing model, leading to the development of the nuclear model proposed by Rutherford.

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In 310 g of magnesium ions (Mg²⁺), there are approximately 7.69 × 10²⁴ magnesium ions. This calculation involves converting the mass of magnesium ions to moles.

To determine the number of ions in 310 g of magnesium ions (Mg²⁺), we need to convert the mass of magnesium ions to the number of moles and then use Avogadro's number to calculate the number of ions.

The molar mass of magnesium (Mg) is approximately 24.31 g/mol.

Number of moles = Mass / Molar mass

              = 310 g / 24.31 g/mol

              = 12.75 mol (rounded to two decimal places)

There is one magnesium ion in one mole of magnesium ions (Mg²⁺).

Number of magnesium ions

= Number of moles × Avogadro's number × Number of ions per mole

= 12.75 mol × 6.022 × 10²³ ions/mol × 1 ion

≈ 7.69 × 10²⁴ magnesium ions

Therefore, there are approximately 7.69 × 10²⁴ magnesium ions in 310 g of magnesium ions (Mg²⁺).

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Answer:

Electromagnetic force, Strong nuclear force, and Weak nuclear force.

Explanation:
Forces acting

electromagnetic force, strong nuclear force, and weak nuclear force. The electromagnetic force keeps the electrons attached to the atom. The strong nuclear force keeps the protons and neutrons together in the nucleus. The weak nuclear force controls how the atom decays.

Answer:

The electric force between them decreases

Explanation:

The force between two charged particle is given by :

\(F=\dfrac{kq_1q_2}{r^2}\)

Where

r is the distance between charges

If the distance between the charges is increased, the electric force gets decreased as there is an inverse relation between force and distance.

Hence, the correct option is (c) "The electric force between them decreases"

Answer:

There are four types of consumers: omnivores, carnivores, herbivores and decomposers. Herbivores are living things that only eat plants to get the food and energy they need. Animals like whales, elephants, cows, pigs, rabbits, and horses are herbivores. Carnivores are living things that only eat meat.

Explanation:

If the molar mass of water is 18.02 g/mol, and the heat of vaporization of water is 40.67 kj/mol, then the energy required to vaporize 12 g of water is 27,12 kJ.

To calculate the energy required to vaporize 12 g of water, we first need to convert the mass of water to moles:

12 g of water / 18.02 g/mol = 0.666 moles of water

Then, we can use the heat of vaporization of water to calculate the energy required:

0.666 moles of water x 40.67 kJ/mol = 27.12 kJ

Therefore, it would take 27.12 kJ to vaporize 0.666 moles of water, or in another words, the energy required to vaporize 12 g of water is 27,12 kJ.

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0.625g is left after 50 years as it has half-life 10 years on decaying

What is half life ?

A quantity's half-life is the amount of time needed for it to decrease to half of its initial value. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last. Additionally, the phrase is used more broadly to describe any form of exponential decay (or, very sometimes, non-exponential decay).

Half-life is a characteristic unit for the exponential decay equation and is constant across the lifespan of an exponentially decaying quantity.

N(t) = N(o) (1/2)^(t/t1/2})

N(t) = quantity of the substance remaining

N(o) = initial quantity of the substance

t      = time elapsed

t{1/2} = half life of the substance

N(t) = 20 (1/2)^(50/10) = 0.625g

0.625g is left after 50 years as it has half-life 10 years on decaying

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Answer:

I think it is 60 :)

Explanation:

Answer:

a) elastic potential energy

b) kinetic energy

c) the forces acting on the stone are gravitational force and an upward force opposing the gravitational force.

d) potential and kinetic energy

The decomposition of wastewater can lead to the following:

II. Eutrophication and algal blooms.

III. The development of dead zones.

A wastewater can be defined as a body of water that has been contaminated due to human use in homes, offices, schools, businesses etc.

Ideally, wastewater should be disposed in accordance with the local regulations and standards because they typically are unhygienic for human consumption or use. Thus, floor drain are used in the kitchen, bathroom and toilet to remove wastewater, so as to mitigate stagnation and to improve hygiene.

Generally, the decomposition of wastewater can lead to the following:

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The volume of dichloromethane \((CH_2Cl_2)\) produced when 149 liters of methane \((CH_4)\) react according to the given reaction is approximately 6.224 x \(10^5 J/K*m^3\).  

The volume of dichloromethane \((CH_2Cl_2)\) produced when 149 liters of methane \((CH_4)\) react according to the given reaction is not immediately apparent from the reaction stoichiometry.

The balanced equation for the reaction between methane  \((CH_4)\) and carbon tetrachloride (CCl4) to form dichloromethane  \((CH_2Cl_2)\) and carbon dioxide (CO2) is:

\((CH_4)\) +  \(CO_2\) →  \((CH_2Cl_2)\) +  \(CO_2\)

The balanced equation shows that 1 mole reacts with 1 mole of CCl4 to produce 1 mole of  \((CH_2Cl_2)\) and 1 mole of  \(CO_2\).

The volume of the gas can be calculated using the ideal gas law:

PV = nRT

To find the number of moles of gas, we can use the molecular masses of the reactants and products:

Molar mass of  \((CH_4)\) = 16.04 g/mol

Molar mass of  \(CCl_4\) = 89.9 g/mol

Molar mass of   \((CH_2Cl_2)\) = 70.1 g/mol

Molar mass of  \(CO_2\) = 44.01 g/mol

The number of moles of  \((CH_4)\) can be calculated from the initial amount of gas:

149 L of CH4 = 149 x 16.04 g/mol = 2432 g

The number of moles of CCl4 can be calculated from the given volume:

149 L of  \((CH_4)\) +  \(CCl_4\) →   \((CH_2Cl_2)\) +  \(CO_2\)

The volume of the gas is given as 149 L, so the number of moles of  \(CCl_4\) can be calculated as:

149 L = 149 x 89.9 g/mol = 13,277 g

The number of moles  can be calculated from the given volume and the desired amount of product

149 L of  \((CH_4)\) + \(CCl_4\) →   \((CH_2Cl_2)\) + \(CO_2\)

149 L of  \((CH_4)\) + \(CCl_4\) → 149 x 70.1 g/mol + 13,277 g x 1 mol/13.277 g = 43,691 g

V = nRT

V = 43,691 g x 8.314 J/mol·K = 364,617.5 J/K

1 J/K = 1/1000 L·K

Therefore, the volume of the gas is:

V = 364,617.5 J/K x (1/1000 L·K) = 3.646 x 10^4 L

substitute this value for V in the equation for the volume of  \((CH_2Cl_2)\) :

PV = nRT

PV = 149 x 8.314 J/mol·K x (3.646 x \(10^4\) L)

PV = 6.224 x   \(10^5 J/K*m^3\).  

Therefore, The volume of dichloromethane \((CH_2Cl_2)\) produced when 149 liters of methane \((CH_4)\) react according to the given reaction is approximately 6.224 x \(10^5 J/K*m^3\).  

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Answer: I don’t know lol

Explanation:  I am so sorry I thought this was easy

Answer:

Ant.

Explanation:

The dog would be the most frantic, when all are compared at an equal speed of 30 mph. An ant of such strength, has six jointed legs and has an exoskeleton. An Ant of such size(mass) and weight would have take off with better traction too(6 legs). So the Ant would have the greatest kinetic energy. Also it would take turns while fleeing from the wildfire, while running at almost 30 mph while the other animals wouldn't come that close.

It is technically and literally illogical to say an ant can do 30 mph in its regular size.

Dont believe me? Watch ants scurrying away when threatened and taking turns and U-turns. Six legs offer more energy while fleeing by instinct. Literally six legs at 30 mph. Crazy!

it is AExplanation because a+w=a

a. RFM CuCO₃ = 123.5

RFM CuO = 79.5

b. 159 g

c. 93.84%

Given

247 g of copper carbonate

149.2 g of copper oxide

Required

a. RFM(relative formula mass)

b. the mass of CuO

c. % yield

Solution

Reaction

CuCO₃⇒CuO+CO₂

a.

RFM CuCO₃ = 63.5+12+3.16=123.5

RFM CuO = 63.5 + 16 = 79.5

b. mol CuCO₃ :

mol = mass : MW

mol = 247 : 123.5

mol = 2

From equation, mol ratio CuCO₃ : CuO = 1 :1 , so mol CuO = 2

mass CuO = 2 x 79.5 = 159 g

c. % yield = (actual/theoretical) x 100%

\(\tt %yield=\dfrac{149.2}{159}\times 100\%=93.8\%\)%yield = (149.2/159) x 100% = 93.84%

Answer:

False

Explanation: