Which two particles are found in an atom's nucleus?
O A. Neutrons
O B. Electrons
O C. Protons
O D. Isotopes

Answer:

the elephant toothpaste would go everywhere

Answer:

A solution with [H+] = 1.0×10-10

Explanation:

Using the equations: pOH = -log([OH-]), pH = -log([H+]), and pH + pOH = 14

To find the most basic solution, find the pH or the pOH.
The pOH of solution 1 is 10, which means the solution is acidic (pH = 4)
The pH of solution 2 is 10, which is quite basic
The pH of solution 3 is 6. slightly acidic
The pOH of solution 4 is 6, and has a pH of 8. Slightly basic
The pH of solution 5 is 6, slightly acidic

Out of all of these, solution 2 and 4 are basic. Solution 2 has a pH of 10, which is more basic than solution 4 with a pH of 8

Answer:

o

Explanation:

it is not a gas because the particles do not move freely it may be a liquid or a solid partly and mostly liquidized.

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

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Answer:

Since the compound contains 25.2% Hydrogen by mass and the compound is made of only carbon and hydrogen

Mass% of carbon = 100 - (mass% of hydrogen)

Mass% of carbon = 100 - 25.2

Mass% of carbon = 74.8%

Mass of each element in a given sample:

Let us take a 100 g sample of this compound

Since there is 25.2% hydrogen by mass, there is 25.2g hydrogen for every 100g of the compound

Similarly, there is 74.8 g carbon for every 100g of the compound

So, in a 100g sample:

Mass of Hydrogen = 25.2 grams

Mass of Carbon = 74.8 grams

Number of moles of each element in the 100g sample:

Moles of Carbon:

Molar mass of carbon = 12 g/mol

Number of moles = Given mass / molar mass

Number of moles = 74.8 grams / 12 g/mol

Moles of Carbon = 6.24 moles

Moles of Hydrogen:

Molar mass of Hydrogen = 1 g/mol

Number of moles = given mass / molar mass

Moles of Hydrogen = 25.2 / 1

Moles of Hydrogen = 25.2 moles

Empirical Formula:

The empirical formula of a compound is the simplest whole number ratio of the number of moles of the elements in the compound

Empirical formula  = Moles of Carbon : Moles of Hydrogen

Empirical formula = 6.24 / 25.2

Since we need a whole number ratio, and these numbers don't simplify to be whole numbers. we will multiply both of them with a common number which will make them both whole

Multiplying both the numbers by 25 makes them whole

Empirical formula = 6.24 * 25 / 25.2 (25)

Empirical formula = 156 / 630

further simplifying the numbers, we can divide them both by 2

Empirical formula = 78 / 315

dividing these numbers by 3

Empirical formula = 16 / 105

Therefore, the ratios of the moles of carbon to the moles of Hydrogen in the empirical formula is:   16 : 105

Empirical formula = C16H105

Answer:

the percentage composition of mass of nitrogen in NH OH is 42.86 %

Without more information about the specific experiment, it is difficult to provide a definitive answer to this question. However, based on the limited information provided, it seems that the experiment involves placing water samples from Detroit and Flint into separate beakers, stirring them, and then introducing a metal coil into each beaker.

What is Metal?

Metal is a type of element characterized by its shiny appearance, malleability, ductility, and ability to conduct heat and electricity. Metals are typically solid at room temperature (except for mercury, which is a liquid) and have a high melting and boiling point.

If the metal coil is made of a reactive metal such as iron, zinc, or aluminum, and the water contains dissolved oxygen and other ions, then the metal coil may undergo a chemical reaction with the water. This could result in the formation of metal ions and the release of hydrogen gas. The metal ions and other reaction products could then combine with other compounds in the water to form insoluble precipitates, which could appear as a cloudy or turbid solution.

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The balanced reaction is shown as ;\(2H_{2} O + 2OH^- + 2CoCl_{2} +Na_{2} O_{2} ---- > 2CoCl_{3} + 4Cl^- + 2Na^+\)

We know that a redox reaction is a kind of reaction where one specie is oxidized while the other specie is reduced in the reaction. In this case, we are trying to see how to balance the reaction that is shown under basic conditions.

We know that under basic conditions, we would have to add the hydroxide ions and water so that we can be able to balance the reaction as shown. We would now have; \(2H_{2} O + 2OH^- + 2CoCl_{2} +Na_{2} O_{2} ---- > 2CoCl_{3} + 4Cl^- + 2Na^+\). Thus the reaction is balanced under basic conditions.

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Answer:

the answer is 11.111 and when you round it to the nearest one it’s 11, but to the nearest tenth it’s 10

Explanation:

Fluoridation is the process of adding fluorine to drinking water to avoid tooth decay.

The question is incomplete; the complete question is;

Fluoridation is the process of adding fluorine compounds to drinking water to help fight tooth decay. A concentration of 1 ppm of fluorine is sufficient for the purpose. (1 ppm means one part per million, or 1 g of fluorine per 1 million g of water.) The compound normally chosen for fluoridation is sodium fluoride, which is also added to some toothpastes. Calculate the quantity of sodium fluoride in kilograms needed per year for a city of 50,000 people if the daily consumption of water per person is 150 gallons.

(Sodium fluoride is 45.0 percent fluorine by mass. 1 gallon = 3.79 L; 1 year = 365 days; 1 ton = 2000 lb; I lb = 453.6 g; density of water = 1.0 g/mL.)

The quantity of sodium fluoride in kilograms needed per year for a city of 50,000 people if the daily consumption of water per person is 150 gallons is \(9.32 * 10^9 Kg\).

From the question, we know that;

Daily consumption of water per person = 150 gallons.

Population of the city = 100,000 people

Total daily city consumption =\(100,000 *  150 gallons = 15 * 10^6 gallons\)

Annual water consumption = \(15 * 10^6 gallons * 365 = 5.475 * 10^9 gallons\)

1 gallon = 3.785 L = 3.785 kg

\(5.475 * 10^9 gallons = 5.475 * 10^9 gallons * 3.785 kg/ 1 gallon = 2.1 * 10^10 Kg\)

Since sodium fluoride accounts for 45% by mass of water

Mass of sodium fluoride= \(0.45 * 2.1 * 10^10 Kg= 9.32 * 10^9 Kg\)

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Any substance made of matter is by definition a chemical, which includes solids, liquids, and gases. Pure substances or mixtures of substances can both be found in chemicals. Water (H2O), for example, is a pure chemical because the same molecules and molecular combinations are present throughout its whole structure.

Any material with a known composition is a chemical. Some chemicals, like water, are found in nature, meaning they always consist of the same "stuff." Other chemicals, including chlorine, are produced (used for bleaching fabrics or in swimming pools).

A chemical compound is a material that contains a specific combination of atoms or ions. Chemical compounds are made up of two or more elements coming together through a chemical process. While all substances are compounds, not all substances are compounds.

On its list of substances covered by the Toxic Substances Control Act, the EPA has more than 85,000 chemicals listed.

Not all chemicals are detrimental to the economy.

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Global warming brought on by rising carbon dioxide concentrations in the atmosphere is changing weather patterns and ocean temperatures. Changes in precipitation patterns are being brought on by the warming of the atmosphere.

Because it is one of the gases in the atmosphere that causes the greenhouse effect, which causes the Earth to warm, carbon dioxide is known as a greenhouse gas. Long-wavelength infrared radiation (heat) from the Earth is absorbed by carbon dioxide molecules in the atmosphere, and some of it is then radiated back downward.

Similarly, as air temperatures rise in response to rising carbon dioxide concentrations, more water vapor escapes into  the atmosphere—which then amplifies greenhouse heating

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The structure of  the alkyne 4 - decyne is shown in the image attached.

Alkyne functional group compounds with a triple bond made of carbon and carbon contain 4-decyne (C). The triple bond is found at the fourth carbon position in the ten-carbon chain (decyne) of 4-decyne.

Nine hydrogen atoms (H) are joined to the first nine carbon atoms (C), starting from the left side.

In conclusion, 4-decyne is made up of a chain of ten carbon atoms, with the fourth carbon atom serving as the center of a carbon-carbon triple bond (C). Except for the carbon involved in the triple bond, all carbon atoms are connected to hydrogen atoms.

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Answer:

Bathtub

Explanation:

Even though the water in a filled bathtub may be at the same temperature as water in a glass, the water in the bathtub has more thermal energy because it contains a greater number of water molecules.

Answer:

C) Sugar solution is a separable mixture but steel is an inseparable mixture.

Explanation:

Sugar can be put in water then have the water dried out and there will be sugar. Metal how ever can not be a separable mixture without making it into a liquid.

There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, the correct option is option C.

Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules.

Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution. Sugar solution is a separable mixture but steel is an inseparable mixture. Sugar can be separated by heating the solution . Water will evaporate and sugar will be left. Steel can not be separated by any means.

Therefore, the correct option is option C that is  Sugar solution is a separable mixture but steel is an inseparable mixture.

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Fe(OH)2 doesn't react with water. Fe(OH)2 is said to have a solubility constant that ranges from 8x10-16 to 2x10-15.

Fe(OH)2 is significantly more soluble than Fe(OH)3, which has a solubility constant in the range of 10-38.

Fe(OH)2 is incredibly insoluble when compared to NaCl (Ksp of roughly 4x101!!! ).

Consequently, perspective is key.

The aqueous solution numbers are in the morning. In the early history of the earth (the "oxygen catastrophe"), the numbers for Fe(II) and Fe(III) were extremely important.

They shouldn't be directly compared because the three solubility products have different dimensions (officially, Fe(OH)3 splits into four ions, Fe(OH)2 splits into three, and NaCl splits into two). However, because of how far apart they are, the morning conclusions remain valid.

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Answer: The absorbance of a compound, with a molar absorptivity at 500 nm wavelength of 252 M⁻¹ cm⁻¹, prepared by dissolving 0.00140 moles of a solute in enough water to make a 500.0 mL solution, measured in a 3 .00 mm pathlength cell, is 0.212.

First, we will calculate the molarity of the compound, which is equal to the moles of solute divided by the liters of solution.

Then, we will convert 3.00 mm to cm using the conversion factor 1 cm = 10 mm.

Finally, we will calculate the absorbance of the compound using the Beer–Lambert equation.

where,

A: absorbance

ε: molar absorptivity

b: length of light path

C: molar concentration

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

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The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

The combined Gas Law equation is represented by B) P1V1 / T1 = P2V2 / T2.

The combined gas law is the law that combines Charles’s law, Gay-Lussac’s law, and Boyle’s law.

Combined gas law can be mathematically expressed as

k = PV/T

Where,

P = pressure

T = temperature in kelvin

V = volume

K  = constant (units of energy divided by temperature)

When two substances are compared in two different conditions, the law can be stated as,

P1V1/T1 = P2V2/T2

Where,

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

P2 = final pressure

V2= final volume

T2 = final temperature

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Answer:

0.37 M

Explanation:

An initial solution of orange juice has a solute concentration of 0.50 M and a volume of 155.0 mL. What is the final solute concentration of the juice after its been diluted with 52.5mL of water?

the old molarity was 0.50 M, and a volume of 1555.0 ml

the new volume is a total of 155.0 ml + 52.5 ml =207.5 ml

so the new molarity is (155.0/207.5) X 0.50 M = 0.37 M

Answer:

N2 + H20

Explanation:

chemical equation balancer

Taking into account the reaction stoichiometry, if 10.3 g of Ca(OH)₂ reacts, 5.01 grams of H₂O are formed.

The balanced reaction is:

2 H₃PO₄ + 3 Ca(OH)₂  → 6 H₂O + Ca₃(PO₄)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 222 grams of Ca(OH)₂ form 108 grams of H₂O, 10.3 grams of Ca(OH)₂ form how much mass of H₂O?

mass of H₂O= (10.3 grams of Ca(OH)₂ ×108 grams of H₂O)÷ 222 grams of Ca(OH)₂

mass of H₂O= 5.01 grams

Finally, 5.01 grams of H₂O are formed.

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The given question is incomplete. The complete question is :

Which of the following Group 17 elements is the least reactive

a) Flourine

b) Chlorine

c) Astatine

d) Iodine

Answer: c) Astatine

Explanation:

Halogen is the name given to Group 17 family with general electronic configuration of \(ns^2np^5\) which have 7 valence electrons and thus easily gain one electron to attain stable configuration.

As we move down the group from flourine to chlorine to bromine to iodine to astatine , the valence shell moves farther from nucleus and thus tendency to accept the electron decreases and thus reactivity also decreases.

Thus Astatine is the least reactive of all.

Explanation:

To calculate the pH of a buffer with a known pKa for the conjugate acid, the Henderson-Hasselbach equation can be used to obtain the pH of the buffer:

\(pH = pK_a + log_{10}(\frac{[A^-]}{[HA]} )\)

[A-] is the concentration of the conjugate base and [HA] is the concentration of the conjugate acid.

Answer:no

Explanation:

Answer:

Scandium is a transition metal

Explanation:

Transient stage is also called the unstable stage and in this stage, there is a gradual decrease in deformation rate to a definite constant value.

A transient state is when a process variable or variables changes, but before the system reaches a steady state.

Transient time is the time it takes for a circuit to change from one steady state to the next.

Therefore, Transient stage is also called the unstable stage and in this stage, there is a gradual decrease in deformation rate to a definite constant value.

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