a guess about what will happen, not based on any previous observations or knowledge

hypothesis, theory, law

Answer:

Denver CO your weclome:)

The first step to solve this question is to calculate the total pressure by finding the sum of the pressure of the tire and the atmospheric pressure:

The total pressure is 44.7psi. Nevertheless, they ask for the pressure in Pascals, so the next step is to convert this pressure in psi to pascals using a conversion factor. We know that 1 psi equals 6894.76Pa, use this as a conversion factor to find the pressure in pascals:

It means that the total pressure of the tire in pascals is 308195.77Pa.

Answer:

.04 cg/L

Explanation:

The basic assumptions of the wave mechanical model of the atom are:

Thomas Young in the 1800s did an experiment to know the nature of light. The experiment is now called the double slit experiment. He passed the light through rectangular slits. He saw that light is not moving as rectangular sheets, but as a wave, in dark and light patches.

Thus, the basic assumptions made by this theory are electron clouds are not continuous, they act like discrete energy.

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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Explanation:

hope it helps, Godbless

Answer:

C + O = CO2

this is the correct answer

Answer:

evaporation

Explanation:

water changing from a liquid to a gas is evaporation

Burning coal produces a large amount of energy. This statement is false about coal. Therefore, option D is correct.

In the United States, coal is primarily used as a fuel to generate electricity. Bituminous coal, subbituminous coal, or lignite are burned in coal-fired power plants. The heat generated by coal combustion is used to convert water into high-pressure steam, which drives a turbine and generates electricity.

Carbon is found in all living things, including humans. When coal is burned, the carbon in the coal combines with the oxygen in the air to form carbon dioxide. Carbon dioxide (CO2) is a colorless and odorless gas, but it is one of several gases in the atmosphere that can trap the earth's heat.

Thus, option D is correct.

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Answer:

1. 1.50 moles

2. 2.52x10²⁵ S atoms

3. 0.166 moles

4. 1.31 moles of Fe

5. 4.12x10²⁴ atoms of O

Explanation:

1 mole is defined as the amount of atoms of ¹²C presents in 12g. This number is 6.022x10²³. That means:

1 mole of atoms = 6.022x10²³ atoms

1 mole of electrons = 6.022x10²³ electrons

1 mole of molecules = 6.022x10²³ molecules

1. Using this conversion factor, 9.01x10²³ atoms are:

9.01x10²³ atoms * (1mol / 6.022x10²³ atoms) = 1.50 moles

2. 41.8 atoms of S are:

41.8 moles * (6.022x10²³ atoms / 1mol) = 2.52x10²⁵ S atoms

3. 1.00x10²³ molecules of methane are:

1.00x10²³ molecules * (1mol / 6.022x10²³ molecules) = 0.166 moles

4. 7.91x10²³ atoms of Fe are:

7.91x10²³ atoms * (1mol / 6.022x10²³ atoms) = 1.31 moles of Fe

5. In 1 mole of HNO3 you have 3 moles of O, in 2.28 moles are:

2.28 mol * 3 = 6.84 moles of O. Atoms are:

6.84 moles of O * (6.022x10²³ atoms / 1mol) = 4.12x10²⁴ atoms of O

Answer:

Electronegativity is a measure of the tendency of an atom to attract electrons (or electron density) towards itself. It determines how the shared electrons are distributed between the two atoms in a bond. The more strongly an atom attracts the electrons in its bonds, the larger its electronegativity.

Explanation:

Compute the initial moles of HCl present in the buffer before any HCl was added. This may be accomplished by utilising the buffer's starting pH and the known dissociation constant (Ka) for the weak acid in the buffer. For example, if the buffer is formed of acetic acid (CH3COOH) and its starting pH is 4.5, we may determine the initial concentration of CH3COOH in the buffer using the Ka value for acetic acid (1.8 x 10-5).

Subtract the total moles of H+ at the location from the beginning moles of H+ in the buffer.

In a chemical process, an acid either provides protons (hydrogen ions) or receives electrons. Acids have a pH value less than 7 and are distinguished by their sour taste and capacity to dissolve certain metals, such as zinc and iron

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Answer:

N5Br3

Explanation:

The bulk density of the soil is 1.696 g/cm³.

The grams and volumetric water content of the soil are 27.328 g and 6.832%.

At field capacity and saturation are 217.088 g and 54.272%.

Mass of the sample at the PWP is 637.352 g.

To solve this problem, use the following equations:

Bulk density = mass of dry soil / total volume of soil

Particle density = mass of soil particles / total volume of soil particles

Total porosity = (total volume of soil - total volume of soil particles) / total volume of soil

Gravitational water = (gravitational water weight / bulk density) / total volume of soil

Capillary water = (capillary water weight / bulk density) / total volume of soil

Hygroscopic water = (hygroscopic water weight / bulk density) / total volume of soil

Volumetric water content = (weight of water / total volume of soil) x 100%

First, calculate the mass of dry soil:

mass of water = 400 cm³ x (4% + 32%)/100 = 144 cm³

mass of dry soil = 400 cm³ - 144 cm³ = 256 cm³

mass of dry soil = 256 cm³ x (2.65 g/cm³) = 678.4 g

Next, calculate the bulk density:

bulk density = 678.4 g / 400 cm³ = 1.696 g/cm³

Also calculate the particle density:

particle density = 2.65 g/cm³

The total porosity can be found using the equation:

total porosity = (400 cm³ - 256 cm³) / 400 cm3 = 0.36

Now, calculate the grams of water and volumetric water content at saturation:

grams of water = 400 cm³ x 4% / 100 x 1.696 g/cm³ = 27.328 g

volumetric water content = (27.328 g / 400 cm3) x 100% = 6.832%

To calculate the grams of water and volumetric water content at field capacity, subtract the hygroscopic water from the total available water:

total available water = 36% - 4% = 32%

grams of water = 400 cm³ x 32% / 100 x 1.696 g/cm³ = 217.088 g

volumetric water content = (217.088 g / 400 cm³) x 100% = 54.272%

Finally, calculate the mass of the sample at the PWP:

mass of water at PWP = 256 cm³ x 9.5% / 100 x 1.696 g/cm³ = 41.048 g

mass of dry soil at PWP = 678.4 g - 41.048 g = 637.352 g

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The balanced nuclear equation is as follows;

²²₁₁Na ---> ²²₁₀Ne + ⁰₋₁β

The correct answer is -1; option A.

Nuclear equations are equations that show the changes that occur in the nucleus of atoms of elements.

The various types of nuclear reactions such as radiation decay, nuclear fusion, and nuclear fission are all represented by nuclear equations, which show the reactants and products. Atomic mass and proton number are conserved in nuclear reactions, as opposed to chemical equations, which demonstrate that the number of distinct elements is conserved in a reaction.

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By using the ideal gas law and Avogadro's number, we find that there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.

To determine the number of molecules of CO2 in 2.5 L at STP (Standard Temperature and Pressure), we can use the ideal gas law and Avogadro's number.

Avogadro's number (N_A) is a fundamental constant representing the number of particles (atoms, molecules, ions) in one mole of substance. Its value is approximately 6.022 × 10^23 particles/mol.

STP conditions are defined as a temperature of 273.15 K (0 °C) and a pressure of 1 atmosphere (1 atm).

First, we need to convert the volume from liters to moles of CO2. To do this, we use the ideal gas law equation:

PV = nRT,

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since we have STP conditions, we can substitute the values:

(1 atm) × (2.5 L) = n × (0.0821 L·atm/(mol·K)) × (273.15 K).

Simplifying the equation:

2.5 = n × 22.4149.

Solving for n (the number of moles):

n = 2.5 / 22.4149 ≈ 0.1116 moles.

Next, we can calculate the number of molecules using Avogadro's number:

Number of molecules = n × N_A.

Number of molecules = 0.1116 moles × (6.022 × 10^23 particles/mol).

Number of molecules ≈ 6.72 × 10^22 molecules.

Therefore, there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.

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The chemical equation which is not correctly balanced is:

2Al + 3 CoCl₂ → AlCl₃  + 3Co

Therefore, option (2) is correct.

A chemical equation is an expression of a chemical reaction in terms of chemical symbols of the elements. The equation that has the number of atoms of each element equal on either side of the equation is known as a balanced chemical equation.

The law of conservation of mass should be followed during the balancing of a chemical equation. The total mass of the elements on the reactant side must be equal to the total mass of elements on the product side in a balanced chemical reaction.

The chemical equation: 2 Al + 3 CoCl₂ → AlCl₃  + 3Co

This chemical equation is not correctly balanced as the number of Al and Cl atoms is not equal on the both reactant and product side. The correctly chemical equation will be:

2Al + 3 CoCl₂ → 2 AlCl₃  + 3 Co

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Answer:

\(\displaystyle K_a = 4.24\times 10^{-10}\)

Explanation:

Write the base reaction of NaA with water:

\(\displaystyle \text{A}^-_\text{(aq)}+\text{H$_2$O}_\text{($\ell$)}\rightleftharpoons \text{HA}_\text{(aq)} + \text{OH}^-_\text{(aq)}\)

Hence, the equilibrium constant expression for the reaction is:
\(\displaystyle K_b = \frac{[\text{OH}^-][\text{HA}]}{[\text{A}^-]}\)

Thus, to find Ka, we can find Kb and use the fact that Ka × Kb = Kw.

From the reaction and initial concentration of NaA, create an ICE chart:

\(\begin{tabular}{llllll} & A^- &\text{H$_2$O} & \rightleftharpoons & HA & OH^- \\I & 0.563 M & \---- & & 0 M & 0 M \\C & -\text{ $ x$} & \---- & & +\text{ $x$ M} & + \text{$x$ M} \\E & \text{(0.563 - $x$) M} & \---- & & \text{$x$ M} & \text{$x$ M} \end{tabular}\)

Find [OH⁻] from the given pH:
\(\displaystyle \begin{aligned} \text{pH} +\text{pOH} & = 14.00 \\ \\ \text{pOH} & = 14.00 - \text{pH} \\ \\ & = 14.00 - (11.56) \\ \\ & = 2.44 \\ \\ -\log[\text{OH}^-] & = 2.44 \\ \\ [\text{OH}^-] &= 10^{-2.44} \\ \\ & =0.00363 \text{ M}= 3.63\times 10^{-3} \text{ M} = x\text{ M}\end{aligned}\)

Solve for all species concentrations at equilibrium from the found x value:

\(\displaystyle [\text{HA}] = [\text{OH}^-] = 3.63\times 10^{-3} \text{ M}\)

And:

\(\displaystyle \begin{aligned} \ [\text{A}^-] & = 0.563 - 3.63\times 10^{-3} \text{ M}\\ \\ & = 0.559\text{ M}\end{aligned}\)

Find Kb:

\(\displaystyle \begin{aligned} \displaystyle K_b &= \frac{[\text{OH}^-][\text{HA}]}{[\text{A}^-]} \\ \\ & = \frac{(3.63\times 10^{-3})(3.63\times 10^{-3})}{(0.559)}\\ \\ & = 2.36\times 10^{-5}\end{aligned}\)

Find Ka:

\(\displaystyle \begin{aligned} K_a\cdot K_b & = K_w \\ \\ K_a & = \frac{K_w}{K_b} \\ \\ & = \frac{(1.00 \times 10^{-14})}{(2.36\times 10^{-5})} \\ \\ &= 4.24\times 10^{-10} \end{aligned}\)

In conclusion:
\(\displaystyle K_a = 4.24\times 10^{-10}\)

From a single location on the circular chromosome, DNA is copied in both directions.

The correct option is E.

Binary fission is the process of asexual reproduction in which one organism is divided into two separate ones. An organism's genetic material, or deoxyribonucleic acid (DNA), doubles when it splits into two halves (cytokinesis) through binary fission, with each new species inheriting one copy of the latter.

Bacterial binary fission is the method by which bacteria split their cells. Find out how binary fission functions, including how to make a new cell wall and a copy of a bacterial chromosome. Mitosis and binary fission, two types of asexual reproduction, both entail the division of a parent cell into two identical daughter cells.

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Answer:

A- Perform an experiment

Explanation:

go play mine craft use code wild ............................

Step 1

the reaction must be completed and balanced as follows:

3 Si + 2 N2 => Si3N4

--------------

Step 2

Information provided:

600 g of Si

500 g of N2

-----

Information needed: (use your periodic table please)

1 mole of Si = 28.0 g

1 mole of N = 14.0 g => 1 mole of N2 = 28.0 g

---------------

Step 3

By stoichiometry,

3 Si + 2 N2 => Si3N4

3 x 28.0 g Si --------- 2 x 28 g N2

600 g Si --------- X

X = 600 g Si x 2 x 28 g N2/3 x 28.0 g Si

X = 400 g N2

For 600 g of Si, 400 g of N2 is needed, but there is only 500 of N2 so the excess is N2 and the limiting reactant is Si.

Answer:

The limiting reactant = Si

The excess reactant = N2

Answer:

flooding

Explanation:

since heavy rainfall, if its greater than usual

this causes flooding

hope this helps:)

Answer:

0.25M

Explanation:

The formula of concentration is c=m/M•V

c=1.85g/74g.mol•0.10L

c=0.25 M

Answer:

it will not be soluble in water Becoz it can only be

separated by passing it through silver nitrate solution

Explanation:

i hope you understand

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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Answer:

? more info

Explanation:

Give users an example of the reactions you've learned about so we can have more of an idea. I'd be glad to help, if you edited your answer, meanwhile I too have homework in need of finishing.

Answer:

286

Explanation:

Add atomic mass of all the Isotopes,

                                          Outcome = 825

divide it by number of isotopes which is 4 because there are 4 isotopes

                       Atomic mass of x = \(\frac{825}{4}\)

                       Atomic mass of x is 286

The atomic mass of the unknown element X is 206 amu. Thus option B is correct.

Atomic mass is defined as the relative mass of the element's atom in comparison to the mass of an atom of the C12 isotope.

In an example, the general atomic mass is the average of the atomic masses of a large number of different isotopes.

First we added atomic mass of each isotopes

= 204 + 206 + 207 + 208 = 824

Now to calculate the atomic mass of element X we divide it by 4 as there is four isotopes

So, atomic mass = 824 / 4

                           = 206 amu

Thus, the atomic mass of the unknown element X is 206 amu. Thus option B is correct.

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