ANSWER CLEARLY NO POINTS WILL BE GIVEN IF YOUR ANSWER ISNT TO THE POINT

Explanation:

Refer to pic............

The total charge on the atom is +1 and the correct option is option 3.

According to the Bohr Atomic model, a small positively charged nucleus is surrounded by revolving negatively charged electrons in fixed orbits.

He concluded that electron will have more energy if it is located away from the nucleus whereas electrons will have less energy if it located near the nucleus.

In a neutral atom, the number of protons is equal to the number of electrons.

Since, this atom has 11 protons and 10 electrons, thus there is one extra protons which gives it a +1 charge.

Therefore, the total charge on the atom is +1 and the correct option is option 3.

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Answer:

The feedback loop involving water vapor and temperature is a positive feedback loop. As temperature increases, the amount of water vapor that can be held in the atmosphere also increases. This leads to an increase in the amount of water vapor in the atmosphere, which further amplifies the greenhouse effect and contributes to additional warming.

In other words, warmer temperatures lead to more water vapor in the atmosphere, which traps more heat, causing further warming, and so on. This positive feedback loop can amplify the initial warming effect caused by other factors such as greenhouse gas emissions or changes in solar radiation.

Conversely, if the temperature decreases, the amount of water vapor that can be held in the atmosphere decreases, which can lead to a decrease in the amount of water vapor present in the atmosphere, reducing the greenhouse effect and contributing to cooling. However, this negative feedback loop is weaker than the positive feedback loop described above, and it tends to be dominated by the positive feedback loop under most circumstances.

The option which is not a safety precaution for handling Radioactive material is option B. Remove all metal before entering the containment room.

Radioactive substances are those which have an unstable nucleus. They achieve stability by emitting radiations like alpha particles, beta particles and gamma rays.

Working or experimenting on such substances can pose serious health risks like cancer, cardiovascular diseases etc.

Therefore following strict safety precautions while handling radioactive material is mandatory.

Certain safety measure could include

1) Protect the skin from radiation exposure by using film bandages.

2) When the radioactive sample is not in use, store them in a shielded container right away.

3) Always use gloves, tongs or remote operated robotic arms to handle the samples.

4) Do not eat, drink, smoke, or apply cosmetics in the laboratory.

5) Wear disposable clothes to reduce the risk of contamination from the samples.

Therefore, The option which is not a safety precaution for handling Radioactive material is option B. Remove all metal before entering the containment room.

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Explanation:

1a) c since c is the biggest part of the pie chart

1b) 25% as it is close to a quarter

quarter=25%

1c) A=10%

1d) I think Mr.M's class was difficult since 35% of people got decent grades (a and b). As that is a percentage less than half of the class i would consider that as a difficult class.

Hope this helped.

Explanation:

Refer to pic............

Explanation:

Refer to pic..... .. .....

Given the volume of the 0.500 M sodium chloride solution is 500 mL. Then, the volume of 0.100 M sodium chloride solution is 2500 ml.

Molarity of a solution is the ratio of its number of moles of solute to the volume of solution in liters. It is the common term to express the concentration of a solution.

The product of molarity and volume then being the number of moles of solute in the solution. Let V1 and M1 be the volume of molarity of a solution and V2 and M2 be the volume and concentration of the diluted solution.

then,

M1 V1 = M2 V2

Given,

M1 = 0.500 M

V1 = 500 mL

M2 = 0.100 M

then V2 = M1 V1/ M2

V2 = 0.500 M × 500 ml /0.100 M

     = 2500 ml.

Therefore, the volume of the diluted solution is 2500 ml.

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The statement that describes the formation of galaxies is "Gravity causes stars to cluster."

What is galaxies ?

The statement that describes the formation of galaxies is "Gravity causes stars to cluster."

Galaxies form from the accumulation of gas, dust, and dark matter through the force of gravity. As the gas and dust in a galaxy cluster together, they begin to collapse under their own gravity, forming stars. Over time, these stars cluster together and form galaxies. Therefore, the correct statement that describes the formation of galaxies is gravity causes stars to cluster.

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Answer:

cbbb vdf jfjd hx

Explanation:

We know a balanced equation by counting the atoms of both sides of the reaction equation.

It seems you are asking something about the balancing of chemical reaction equations and I will explain just that.

Balancing a chemical equation involves making sure that the number of atoms of each element on the reactant side of the equation is equal to the number of atoms of that element on the product side of the equation. Here are the steps to balance a chemical equation:

Write the chemical equation using the correct chemical formulas for the reactants and products.

Count the number of atoms of each element on the reactant side and the product side of the equation.

Identify the element that is not balanced.

Use coefficients (numbers in front of the chemical formulas) to balance the equation. Start with the element that appears in the fewest number of compounds and work your way up.

Double-check that the equation is balanced by counting the number of atoms of each element on both sides of the equation.

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The specific rotation of a substance is a measure of its ability to rotate the plane of polarized light. It is usually denoted by the symbol [α] and is expressed in degrees per unit length and concentration.

The specific rotation of (R)-(-)-monosodium glutamate is -2.4° (or -2.4 degrees) when measured in a 1-decimeter cell at a concentration of 10 g/100 mL in water. The negative sign indicates that the rotation is counterclockwise or left-handed, which is typical for most amino acids.

Note that the specific rotation of a substance can vary depending on the wavelength of light used and the temperature at which the measurement is taken. Therefore, it is important to specify these parameters when reporting the specific rotation of a substance.

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A) To calculate the total bond energy, we need to know the bonds broken and formed in the reaction. In this case, the reactants are C₂H₄ and H₂, and the product is C₂H₆.

Reactants:

C₂H₄ has one C=C bond and four C-H bonds. Total bond energy

= (1 x 614 kJ/mol) + (4 x 413 kJ/mol) = 2462 kJ/mol

H2 has one H-H bond. Total bond energy

= 1 x 436 kJ/mol = 436 kJ/mol

Products:

C₂H₆ has six C-H bonds and one C-C bond.

Total bond energy

= (6 x 413 kJ/mol) + (1 x 348 kJ/mol) = 2862 kJ/mol

Total energy = reactant energy - product energy = (2462 kJ/mol + 436 kJ/mol) - 2862 kJ/mol = 36 kJ/mol

Therefore, the total bond energy for the reaction is 36 kJ/mol.

B) The reaction is exothermic because the total energy is negative (-36 kJ/mol). This means that energy is released when the reaction occurs.

C) The formation of C-C bond releases energy (348 kJ/mol), and the breaking of C=C bond requires energy input (614 kJ/mol). The formation of four C-H bonds releases energy (4 x 413 kJ/mol = 1652 kJ/mol), and the formation of two additional C-H bonds releases more energy (2 x 413 kJ/mol = 826 kJ/mol). The breaking of one H-H bond requires energy input (436 kJ/mol).

The total energy released by the formation of new bonds is greater than the energy required to break the old bonds, resulting in an exothermic reaction.

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Explanation:

OK thank you so much I hope you are well

Answer:0.146 torr

Explanation:

Yes to the gas constant

you use 0.0821 L.atm/mol.k  If you want pressure in atm

use 62.44 L.torr/ mol.k  if you want pressure in torr

n=PV/RT

n= 722.4 X 3.79/(62.44 X 300) =

The value of the equilibrium constant is independent of the initial concentration of the reactants. It has a definite value for every reversible reaction at a particular temperature.

The equilibrium constant can be defined as the ratio of the product of molar concentrations of the products to that of the reactants with each concentration term raised to a power equal to its coefficient in the balanced chemical equation.

The expression of the equilibrium constant is:

Keq = [AD]² [BD]² [C]⁴ / [AB]²[CD]⁴

Thus the expression of the equilibrium constant is determined.

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Explanation:

The temperature of the system is increasing because the ice is melting and releasing energy in the form of heat. The energy released when the ice melts is greater than the energy needed to maintain the temperature of the system, causing the temperature to increase.

52×1022 molecules =2×7. 52×1022=15×1022.

= 15,330

Explanation:

The atomic model is a scientific theory that describes the structure and behavior of atoms. In the early 20th century, scientists began to develop new models of the atom as they discovered more about its properties. One of the earliest models was proposed by J.J. Thomson in 1897, which suggested that the atom was a sphere of positive charge with negatively charged electrons embedded within it. This model was later replaced by the Rutherford model in 1911, which showed that the atom had a small, dense nucleus surrounded by orbiting electrons. The modern quantum mechanical model of the atom, which is widely accepted today, uses complex mathematical equations to describe the behavior of electrons within atoms. To create an accurate model, scientists must use experimental data, such as the energy levels of electrons, the wavelengths of light emitted by atoms, and the positions of spectral lines, to calculate the probabilities of where electrons are likely to be found within the atom. The resulting model allows scientists to make predictions about how atoms will behave under different conditions, and it has many practical applications in fields such as chemistry, physics, and engineering.

Answer:

Atomic models are representations of the structure of an atom. They are important tools in understanding the behavior of atoms and their interactions with other atoms. In creating an atomic model, scientists must first gather and analyze experimental data to determine the properties and behavior of the atoms. They then use mathematical equations and theories, such as quantum mechanics, to develop a model that accurately represents the observed behavior of the atoms. The model must take into account the position and movement of the electrons around the nucleus, as well as the various energy levels of the electrons. By studying atomic models, scientists have been able to make important discoveries about the nature of matter and the fundamental forces that govern the behavior of atoms.

Explanation:

Answer:

The chemical equation for this reaction above would be written as: 2 H 2 ( g) + O 2 ( g ) → 2 H 2 O ( g )

Explanation:

We need to add 0.316 moles of KNO3 to 100g of water to form a saturated solution at 10°C.

To determine how many moles of KNO3 would have to be added to 100g of water to form a saturated solution at 10°C, we need to know the solubility of KNO3 at this temperature.

According to the solubility data, the solubility of KNO3 at 10°C is approximately 32 grams per 100 grams of water.

So, to make a saturated solution at 10°C, we need to add 32 grams of KNO3 to 100 grams of water.

Now, we can calculate the number of moles of KNO3 needed using its molar mass :

Molar mass of KNO3 = 101.1 g/mol

Number of moles of KNO3 = mass of KNO3 / molar mass of KNO3

Number of moles of KNO3 = 32 g / 101.1 g/mol

Number of moles of KNO3 = 0.316 moles

Therefore, we need to add 0.316 moles of KNO3 to 100g of water to form a saturated solution at 10°C.

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The  key difference in between the chemical and the nuclear reactions is Chemical reaction will occurs outside the nucleus and the Nuclear reaction occurs inside the nucleus.

The Chemical reaction will normally occurs outside the nucleus. The Nuclear reaction will only occurs inside the nucleus. When the chemical reactions occur the elements will hold their identity and the nuclei of the atoms also be remains unchanged. During the nuclear reactions, the nuclei of the atoms will changes completely and the new elements are formed.

The chemical reactions will be balance in terms of the mass and the nuclear reaction will occurs in the terms of the mass and the energy.

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Answer:

the water is being observed a bi paper towel material through a process called capillary action capital reaction on Sonu's capability is a rising or absorption

Answer: The water spreads out and covers a larger area on the paper towel.

One mole of potassium carbonate decompose to give one mole or 32 g of oxygen. Hence, 10 g of potassium carbonate will give 2.31 g of oxygen gas.

Decomposition is type of reaction in which the one compound breaks into its constituent elements and compounds. Potassium carbonate is an ionic compound which can decomposed on heating to given CO and oxygen gas as follows:

[tex]\rm K_{2}CO_{3} \rightarrow 2 K + O_{2} + CO[/tex]

As per this balanced chemical equation of the decomposition, one mole of potassium carbonate produces one mole of oxygen gas.

molar mass of potassium carbonate = 138 g/mol

molecular mass of O₂ = 32 g/mol

Hence, 138 g of potassium carbonate gives 32 g of oxygen gas. Then, 10 g of potassium carbonate will give

(10 × 32)/138 = 2.31 g.

Therefore, the mass of oxygen formed from 10 g of potassium carbonate will be 2.31 g.

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The grams of solute present in 585 mL of 0. 610 M KBr is given by Mass of solute = 42.46 g KBr.

The total number of moles of solute per litre of solution is defined as the molarity of a specific solution. Because, unlike mass, the volume of a system changes with changes in physical circumstances of the system, the molality of a solution is reliant on changes in physical qualities of the system such as pressure and temperature. M, which stands for molarity, represents molarity.

M = 0.610  and V = 585mL = 0.585 L

Molarity is given by,

M = mol/V

M  is molarity.

mol is moles of solute.

V is volume of solution in liters.

we need to determine moles so,

0.610 = mol / 0.585

mol = 0.35685 mol KBr

We must now convert this mole quantity to mass. KBr has a molar mass of 39.098 g/mol + 79.904 g/ mol = 119.002 g / mol.

0.3568 x 119.002 = 42.46 g KBr.

So, the mass of solute is 42.46 g KBr.

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Answer: Flat. The meniscus will be flat/neutral with no curves if adhesion and cohesion are equal.

The statement that is true about strong electrolytes , weak electrolytes , and non-electrolytes is:

Silver chloride (AgCl) is insoluble in water; option D.

Chloride (Cl-) ion is soluble in water; option C

Potassium iodide (KI) and silver nitrate (AgNO₃) will result in a precipitate, according to solubility rules; option D.

Dilute solutions have a higher solvent-to-solute ratio than concentrated solutions; option A.

The volume of sodium chloride solution required is calculated using the formula:

Where:

M1 = 0.500 M (initial concentration)

V1 = volume of initial solution (unknown)

M2 = 0.100 M (final concentration)

V2 = 500 mL = 0.500 L (final volume)

Rearranging the formula to solve for V1, we get:

V1 = M2V2/M1

V1 = (0.100 M)(0.500 L)/(0.500 M)

V1 = 0.100 L

The volume of the 0.500 M sodium chloride solution required is 0.100 L.

15. The volume of the original solution required will be;

M1V1 = M2V2

Where:

M1 = 0.500 M (initial concentration)

V1 = volume of initial solution (unknown)

M2 = 0.100 M (final concentration)

V2 = 250 mL = 0.250 L (final volume)

Rearranging the formula to solve for V1, we get:

V1 = M2V2/M1

V1 = (0.100 M)(0.250 L)/(0.500 M)

V1 = 0.050 L or 50.0 mL

The volume of the original 0.500 M hydrochloric acid solution needed is 50.0 mL.

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Answer:

Answer:

Calcium chloride is used in medication to help treat people who have low levels of calcium in their body. It helps supplement the necessary amount of calcium needed for healthy functioning.

Explanation:

The grams of the KI are in the 25.0 ml of a 3.0 % m/v of the KI solution is 0.75 g.

The volume of the solution = 25 mL

The mass by volume of KI = 3 % m/v

The potassium iodide solution will contain the 3.0 g of the potassium iodide for the every 100 mL of the solution.

The amount of the KI in grams is as follows :

The mass of the KI in grams = (25 mL× 3 g ) / 100 mL

The mass of the KI in grams = 0.75 g

Thus, the amount of the KI in the grams is 0.75 g in the volume of the 25 mL.

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