help PLZ will give brainliest

Explanation:

the table is not given plz send the table

Answer:

This question is incomplete, the gravitational potential energy is 2.65 x 10^5 J

mass of the boulder = 866.7g

Explanation:

Potential energy (P.E) refers to the energy due to the position of a body. It can be calculated as follows:

P.E = m × g × h

Where;

m = mass of substance (g)

g = acceleration due to gravity (m/s²)

h = height (m)

According to the information provided in this question,

h = 31.2 m

g = 9.8m/s²

m = ?

P.E = 2.65 x 10^5 J

Using P.E = m × g × h

2.65 x 10^5 = m × 9.8 × 31.2

2.65 x 10^5 = 305.76m

265000 = 305.76m

m = 265000 ÷ 305.76

m = 866.69

mass of the boulder = 866.7g

For vacancy diffusion, an atom must have sufficient activation energy to break bonds with neighboring atoms and move to an adjacent vacancy.

In solids, vacancy diffusion occurs when atoms move through crystal structures by jumping from one lattice site to another. To make such a move, an atom needs enough energy to overcome the bonding forces holding it in its current position. This energy is known as the activation energy.

By possessing sufficient activation energy, an atom can break its bonds with neighboring atoms, creating a temporary vacancy or defect in the lattice. The atom can then migrate to an adjacent lattice site or vacancy, filling the empty space.

The activation energy required for vacancy diffusion depends on the strength of the atomic bonds and the nature of the crystal structure. Higher activation energies are typically associated with stronger bonds, making diffusion less likely to occur at lower temperatures. As temperature increases, atoms acquire greater thermal energy, increasing the probability of overcoming the activation energy barrier and facilitating vacancy diffusion.

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ANSWER

EXPLANATION

Firstly, we need to define the word titration.

Titration is defined as a technique that is used to determine the known concentration of an unknown solution.

This normally occurs between an acid and a base

During titration, an indicator changes color when equilibrium has been attained between the two solutions. The solutions are normally acid and base. At equilibrium, the number of moles of acid is equal to the number of base.

Therefore, the correct answer is option C

Explanation:

a) K(s) + I2(s)  --> KI(s)

The balanced equation is;

2K(s) + I2(s)  --> 2KI(s)

b) Mg(s)  +  Br2(l)  --> MgBr2(s)

The balanced equation is;

Mg(s)  +  Br2(l)  --> MgBr2(s)

c) KBr(aq)  +  AgNO3(aq)  --> KNO3(aq)  + AgBr(s)

The balanced equation is;

KBr(aq)  +  AgNO3(aq)  --> KNO3(aq)  + AgBr(s)

d) KClO3(s)  --> KCl(s)  +  O2(g)

The balanced equation is;

2KClO3(s)  --> 2KCl(s)  +  3O2(g)

e) C2H6(g)  +  O2(g)  -->  CO2(g)  + H2O(l)

The balanced equation is;

2C2H6(g)  +  7O2(g)  --> 4CO2(g)  + 6H2O(l)

f) Al(s)  +  O2(g)  --> Al2O3(s)

The balanced equation is;

4Al(s)  +  3O2(g)  --> 2Al2O3(s)

g) P4(s)  +  H2(g)  --> PH3(g)

The balanced equation is;

P4(s)  +  6H2(g)  --> 4PH3(g)

Sulfuric acid can dissociate into hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−).

Sulfuric acid is a very strong acid which ionizes into hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−) while on the other hand, in dilute solutions the hydrogen sulfate ions also dissociate, forming more hydronium ions and sulfate ions (SO42−).

So we can conclude that Sulfuric acid can dissociate into hydronium ions (H3O+) and hydrogen sulfate ions (HSO4−).

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The pressure of hydrogen gas formed in mmHg is 745.7 mmHg. In order to find the pressure of hydrogen gas formed in mmHg, we need to make use of the Dalton's Law of Partial Pressures which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each individual gas present.

We know that the total pressure of gas collected over water is 770.0 mmHg and that the temperature is 25.5 °C. Since the gas was collected over water, we know that it must have contained some amount of water vapor. This means that the total pressure is equal to the sum of the partial pressures of hydrogen gas and water vapor. Let's use this information to find the partial pressure of hydrogen gas.1.

We can use a table or a graph to find this value. A quick search shows that the vapor pressure of water at 25.5 °C is 24.3 mmHg.2.

Now we can use the Dalton's Law of Partial Pressures to find the partial pressure of hydrogen gas. P total = PH₂ + P water PH₂ = P total - P water

PH2 = 770.0 mmHg - 24.3 mmHg

PH2 = 745.7 mmHg.

Therefore, the pressure of hydrogen gas formed in mmHg is 745.7 mmHg.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

OA. YESS

Explanation:

They will because they are all over America.

Answer:

A) Boron

Explanation:

I put oxygen and it was wrong lol. So, it said it was Boron

Answer:

It's the first answer choice for sulfur and the second answer choice for magnesium I believe

The concentration of Vitamin C in the tablet and in the orange to determine concentration the concentration has increases the vitamin C content

Vitamin C is an antioxidant that help to protect cell against the effect of free radicle and vitamin C is used for the growth and repair of tissues in all parts of your body

Mild and standard pasteurization slightly increases the total vitamin C content as contribution from orange solid parts whereas concentration and freezing did not show significant changes and orange juice is simply healthier and has many nutrient and in addition to being the rich sources and pure 100 gram sample of vegetable and fruits and strain it through cheesecloth with about 50 mL of distilled water and add distilled water to bring the total volume up to 100 mL from your measurement you can figure out how much vitamin C there is per 100 g of the fruit or vegetable you sampled

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Explanation:

I think Low melting point

because NaCl (salt has mp 801 degC)

Water has mp 0 degC

Answer:

Properties: The melting point of phosphorus (white) is 44.1°C, boiling point (white) is 280°C, specific gravity (white) is 1.82, (red) 2.20, (black) 2.25-2.69, with a valence of 3 or 5. There are four allotropic forms of phosphorus: two forms of white (or yellow), red, and black (or violet).Oct 7, 2019

Atomic Number: 15

Atomic Weight: 30.973762

Explanation:

: )

Answer:

Properties: The melting point of phosphorus

Atomic Number: 15

Atomic Weight: 30.973762

Discovery: Hennig Brand, 1669 (Germany)

According to the question the final temperature of the mixture is 305.7 K.

Energy is the ability to do work. It is present in many forms, such as heat, light, sound, electricity, and chemical energy. Energy can be transferred from one form to another, or it can be converted from one form to another. Energy can be used to power machines, heat homes, light up cities, and create new materials.

Before mixing:

Heat energy = mass x specific heat capacity x change in temperature

Heat energy before mixing = (27.0 g)(4.184 J/g⋅°C)(285 K - 273 K) + (47.0 g)(4.184 J/g⋅°C)(320 K - 273 K)

Heat energy before mixing = 1040 J + 7012 J = 8052 J

After mixing:

Heat energy = mass x specific heat capacity x change in temperature

Heat energy after mixing = (74.0 g)(4.184 J/g⋅°C)(T - 273 K)

Heat energy after mixing = 8052 J

Therefore,

(74.0 g)(4.184 J/g⋅°C)(T - 273 K) = 8052 J

T = (8052 J / (74.0 g)(4.184 J/g⋅°C)) + 273 K

T = 305.7 K

Therefore, the final temperature of the mixture is 305.7 K.

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D represents 222, E represents 86, F represents 234 and G represents 90.

These two chemical processes are an example of an alpha decay process. The process of heavier nuclei decaying into lighter nuclei and producing an alpha particle is known as alpha decay. The alpha particle also referred to as a helium nucleus, has a charge of +2 units.

\(\frac{A}Z} X=\frac{A-4}{Z-2} Y + \frac{4}{2} He\)

The isotope that was created has an atomic mass that is 4 units less and an atomic number that is 2 units less.

In the chemical equations, then:

\(\frac{86}{226}Ra =\frac{84}{222} Rn + \frac{4}{2} He\)

D stands for 222, and E for 86.

\(\frac{92}{238}U =\frac{90}{234}Rn + \frac{4}{2} He\)

F represents 234 and G represents 90.

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Answer:

I think air is more denser than oxygen

The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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The hue cancellation experiments described in the textbook, if the starting color were too reddish, you would add its complementary color, which is green, to neutralize the reddish hue. This process is called cancellation, as it involves combining two colors that counteract each other, resulting in a neutral or balanced color.

The hue cancellation experiments described in the textbook, if the starting color were too reddish, you would add a complementary color such as green to cancel out the redness and achieve a more balanced hue. The hue cancellation experiments described in the textbook, if the starting color were too reddish, you would add its complementary color, which is green, to neutralize the reddish hue. This process is called cancellation, as it involves combining two colors that counteract each other, resulting in a neutral or balanced color.

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it is A it got to be A)-4k

Explanation:

Chromatography can be used to separate chlorophyll into a variety of pigment colours.

The leaf contains the chlorophyll molecule, which can be isolated using paper chromatography. Based on the distance that pigment molecules on the paper in a nonpolar solvent travelled, the paper chromatography separates the pigments in the leaf.

During paper chromatography, pigments separate because of their various polarity. Being polar, cellulose interacts more with polar pigments than non-polar pigments. Capillarity and absorbance are essential for chromatography.

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Question:

Using chromatography you can separate chlorophyll into several different pigment colors. Which statement is true about chlorophyll in this context, and what is its role in photosynthesis?

(a) To get the pH of the media to 5.8, you would add NaOH solution. NaOH is used as a basic solution, and when it is added to a solution, it will increase the pH of the solution.

(b) The molecular weight of BA is 225.3. To prepare a 1M solution, you would have to weigh out 225.3 grams of BA.(c) To convert a 1M solution of BA to mg/mL, you can use the following equation: 1 mole = molecular weight in grams; 1000 millimoles = 1 mole. So, 1 M = 1000 mg/mL. Therefore, a 1M solution of BA is equivalent to 1000 mg/mL .(d) To convert a concentration of 1000 mg/mL .

Therefore, to calculate the weight required for a 5 mM solution, use the following formula :Mass of BA = molarity × volume × molecular weight= 5 × 0.001 × 225.3= 1.1265 grams(f) To convert a concentration of 5 mM to mg/mL, we use the following formula: Concentration (mg/mL) = (Concentration (mM) × Molecular weight) / 1000= (5 × 225.3) / 1000= 1.1265 mg/mL(g)

To convert a concentration of 1.1265 mg/mL to mg/L, we multiply by 1000, so 1.1265 mg/mL = 1126.5 mg/L.(h) Given that the stock solution of BA is 5 mM and the working solution is 0.2 mg/mL.

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Answer:

it's volume also decrease

71.5 kJ of heat is released when 0.250 moles of hydrogen gas react with the required amount of oxygen.

When hydrogen reacts with oxygen, it produces water and releases heat. This is an exothermic reaction with a high energy yield, and it is often used in rocket propulsion.

The balanced chemical equation for the reaction between hydrogen and oxygen is:

2H2(g) + O2(g) → 2H2O(l) + energy

From the balanced equation, we can see that 2 moles of hydrogen react with 1 mole of oxygen to produce 2 moles of water. Therefore, the amount of oxygen required to react with 0.250 moles of hydrogen is 0.125 moles.

Assuming the reaction occurs at constant pressure and temperature, we can use the equation:

ΔH = Q / n

where ΔH is the enthalpy change, Q is the heat released or absorbed by the reaction, and n is the number of moles of the limiting reactant (in this case, hydrogen).

The enthalpy change for the combustion of hydrogen gas is -286 kJ/mol. Therefore, the heat released by the reaction of 0.250 moles of hydrogen is:

Q = ΔH x n = -286 kJ/mol x 0.250 mol = -71.5 kJ

Note that the negative sign indicates that the reaction is exothermic and releases heat.

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1.ONCl is polar covalent compound.

2.H₂O₂ is polar covalent compound.

3.C₂H₄ is non polar covalent compound.

4. O₂ is non polar covalent compound.

5.CH₂S is an ionic compound.

In most cases, ionic compounds are created when a metal interacts with a nonmetal. The reaction between two nonmetals produces covalent compounds. Binary compounds containing hydrogen are typically covalent compounds since hydrogen is a nonmetal.

Because of the largely minor difference in electronegativity, the covalent bond is sometimes referred to as nonpolar. It also implies that there is no charge gap between the two atoms or that their electronegativity is identical.

Two oxygen atoms make up one oxygen molecule. Two covalent connections, one of which is a sigma bond and the other a pi bond, are formed when each O atom shares its two electrons.

Thus,  O₂ is non polar covalent compound.

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The given containers are of the same volume but have different concentrations of solutes. In this case, the first container contains only water with no solute and the second container contains a 1M sodium chloride solution. Therefore, there is a difference in water concentration between the two containers.

The concentration of water in the first container is 100% while the second container contains a solution of 1M sodium chloride. This means that the concentration of water in the second container is less than 100% since some of the volume is occupied by the solute. Thus, the water concentration in the two containers is different. Hence, the answer is that there is a difference in the water concentration.

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