Relate microscopic bonding properties to solid state properties

Answer:

respiration and photosynthesis

Explanation:

The percentages of carbon dioxide and oxygen in Earth's atmosphere are maintained most directly by cellular respiration and photosynthesis.

Photosynthesis simply refers to a biological and chemical process through which green plants convert light energy derived from the Sun into chemical energy, so as to make their food while using carbon dioxide (CO₂) and releasing oxygen.

On the other hand, cellular respiration is a series of metabolic reactions that occur in living cells and it involves the use of oxygen that are typically produced by green plants (autotrophs) during photosynthesis.

This ultimately implies that, the percentages of carbon dioxide (1%) and oxygen (20%) that are contained in Earth's atmosphere are maintained most directly by cellular respiration and photosynthesis.

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Answer:

D, two of the above, oxygen and hydrogen.

Explanation:

To solve this problem we can either use orbital stuff or common knowledge. Oxygen and hydrogen are known to form O2 and H2, while sodium forms metallic bonds between the atoms.

Answer:

Melting

Explanation:

Ice begins to melt at 0 degrees celsius

Melting is from solid to liquid

Freezing is from liquid to solid

Sublimation is from solid to gas

Deposition is from gas to solid

Explanation:

Our Direct Nanofiltration (dNF) membranes offer the unique combination of a low fouling hollow fiber configuration with the ability to remove organics and salinity (hardness) from water in one simple step. Other than a strainer, no further pre-treatment is required. We manufacture our membranes with a patented layer-by-layer process, where multiple nano-scale layers are deposited on a membrane support. This method enables very precise and controlled rejection and flux properties of the membrane. A unique solution for troubled water.

The mass of KCl that exists in 20.3 g of solution containing 1.14% by mass of KCl is 0.23 g

From the question given above, the following data were obtained:

Mass of solution = 20.3 g

Percentage of KCl = 1.14% = 1.14 / 100 = 0.0114

[tex]Percentage = \frac{mass of solute}{mass of solution} * 100\\\\0.0114 = \frac{mass of KCl}{20.3} \\\\[/tex]

Cross multiply

Mass of KCl = 0.0114 × 20.3

Therefore, the mass of KCl in the solution is 0.23 g

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Answer:

Percentage purity of a substance can be calculated by dividing the mass of the pure chemical by the total mass of the sample, and then multiplying this number by 100.

Explanation:

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Explanation:

I think third(white) isn't a redox reaction

Answer:

Explanation:Leeuwenhoek observed animal and plant tissue, human sperm and blood cells, minerals, fossils, and many other things that had never been seen before on a microscopic scale. He presented his findings to the Royal Society in London, where Robert Hooke was also making remarkable discoveries with a microscope.

Answer:

C. 176 grams

Explanation:

48g / (12g/mol) = 4.0mol. Moles of Oxygen used. = 128g / (32g/mol) = 4.0mol. C + O2 => CO2. Therefore ...

Answer:

it allow us to compare the amount of energy passing through each tropical level over a period of time

Answer:

A student performed titration to find the concentration of acetic acid. Titrant was sodium hydroxide. He went beyond the indicator color change by adding too much titrant.

Explanation:

hope it helps you

Answer:

oxygen

Explanation:

One mole of atoms of oxygen has a mass of 16 g, as 16 is the atomic weight of oxygen, and contains 6.02 X 1023 atoms of oxygen.

Given that a single-displacement reaction occurred between two (2) reactants which were placed into a flask,  the potential identities of A, B, and X are: D. A = Mg, B = O, X = Cl.

A single-displacement reaction is also referred to as a single-replacement reaction and it can be defined as a type of chemical reaction wherein a single (one) chemical element of the reacting chemical compound is displaced (replaced) by a similar chemical element.

This ultimately implies that, a single-displacement reaction typically involves a single element displacing another chemical element within a chemical compound.

Note: A potential identity reveals the chemical symbol or name of a chemical element in a particular chemical reaction.

Given the following general reaction of scheme of:

                                     [tex]2AB+2X_2\rightarrow 2AX_2+B_2[/tex]

We would proceed to replace the variables with chemical elements as follows:

                                    [tex]2MgO+2Cl_2\rightarrow 2MgCl_2+O_2[/tex]

Therefore, the potential identities of A, B, and X are:

[tex]A = Mg\\\\B = O\\\\X = Cl[/tex]

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PS: Your question is lacking the necessary information, but I have provided them in the image attached.

Answer:

Answer: Change in speed = 11 m/sTime taken = 3.4sHence, acceleration = (11/3.4) m/s² = 3.235 m/s²

Explanation:

(winks and runs off)

Acceleration is 3.235 m/s² when Usain Bolt went from 0.0 to 11.0 m/s in 3.4 seconds.

Acceleration is defined as a rate at which the velocity changes with time with respect to both speed and direction.An object is said to be accelerated if it's speeds up r slows down.

Motion along a circle is always accelerated even when speed is constant it's direction is continuously changing.Acceleration is a vector quantity as it has both magnitude as well as direction.The magnitude of acceleration is described by Newton's second law of motion.

Formula of acceleration is change in speed /time.Substituting the given values in the given formula,(11.0-0.0)/3.4=3.235 m/s².

Thus, the acceleration  is 3.235 m/s² when Usain Bolt went from 0.0 to 11.0 m/s in 3.4 seconds.

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Anwser:

Research scientific principles involved in water availability.

Explanation:

Before building or investment you always want to see and know what your up against and what the best way to help or solve is. Researching why there's a problem in water availability or/and the principals to water availability will help you see what the problem is with what's happening to and around the process and it's environment.

Answer:

should be a or d, though im leaning towards d more. sadly can't narrow it down 100%. b nor c are correct since they are made out of wood and plastic which cannot allow electricity to pass by. copper and metal are effective conductors of electricity, which a steel knife and a glass tube is made out of.

Answer:

heat energy released by the substance

The energy change that takes place during deposition is that heat energy is released by the substance. This statement is true about deposition.

Deposition is a phase transition that occurs when a gas is converted directly to a solid without passing through the liquid state. During deposition, energy is released by the gas particles and absorbed by the surface, resulting in a decrease in the energy of the gas particles and an increase in the energy of the surface particles.As a result, the substance releases heat energy as it changes from a gas state to a solid state.

Therefore, the correct option is:Heat energy released by the substance.

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The molecular formula of the compound is C12H15O3 hence the molar mass of the compound is 207 g/mol.

We need to obtain the number of moles of carbon, hydrogen and oxygen in the compound;

Carbon = 24.91 g/44g/mol × 1 mole of carbon = 0.566 moles

Mass of carbon =  0.566 moles × 12 g/mol = 6.792 g

Number of moles of hydrogen = 6.522 g/18 g/mol × 2 moles = 0.725 moles

Mass of hydrogen = 0.725 moles  × 1 g/mol = 0.725 g

Mass of oxygen = 10 - (6.792 g + 0.725 g) = 2.483 g

Number of moles of oxygen = 2.483 g/16 g/mol = 0.155 moles

Now we must divide through by the lowest number of moles;

C - 0.566/0.155   H - 0.725/0.155     O - 0.155/0.155

C - 4                    H - 5                        O - 1

The simplest formula is C4H5O Recall that the molar mass of the compound lies between 150.0 and 220.0 g/mol

4(12) + 5(1) + 16 = 69

Hence; n = 3 and the molecular formula of the compound is C12H15O3

The molar mass of the compound is; 12(12) + 15(1) + 3(16) = 207 g/mol

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Answer:

law of conservation of energy

The predicted concentration of IO₃⁻ needed to start the precipitation titration is 1.703 × 10⁻⁷ M

The dissociation of zinc (II) iodate can be expressed as:

[tex]\mathbf{Zn (IO_3)_2 \to Zn^{2+} + 2IO_3^-}[/tex]

Given that the solubility product constant Ksp value = 3.9 × 10⁻⁶

For the above dissociation,

[tex]\mathbf{Ksp = [Zn^{2+ }] [IO_3^-]^2}[/tex]

Since [tex]\mathbf{ [Zn^{2+ }] = [Zn(NO_3)_2] = 0.229 \ M}[/tex]

∴

[tex]\mathbf{3.9\times 10^{-8} =(0.229) \times [IO_3^-]^2}[/tex]

[tex]\mathbf{ [IO_3^-]^2 = \dfrac{3.9\times 10^{-8} }{(0.229)}}[/tex]

[tex]\mathbf{ [IO_3^-]^2 = 1.703 \times 10^{-7} \ M}[/tex]

Therefore, we can conclude that the initial predicted concentration of IO₃⁻ needed to start the precipitation titration is 1.703 × 10⁻⁷ M

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The number of atoms of nitrogen in 4N₂O is 8 atoms.

Atom are the basic or fundamental units of matter that defines its structure.

The atom housed the proton, neutron and electron. The atoms of nitrogen in 4 moles of the Nitrogen oxide is the number of each nitrogen present in it .

Therefore,

4N₂O → Number of atoms of Nitrogen will be 4 × 2 = 8 atoms.

Therefore, the number of atoms of nitrogen in the compound 4N₂O is 8.

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Observe the superscript of N

Means

Now as there is 4 multiplied

Answer:

12.34

Explanation:

because this is how we do this

The answer is A. The explanation is in the image.

On the top of the image where it just says equation:, that is part of the sentence "First we need to balance the equation:"

Answer:

The answer to these are:

(A) 32

(B) If it is balanced 32

(C) 80

Explanation:

Explanation:

option C is correct!

hope this answer helps you dear!

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The Correct choice is ~ C

Atomic mass of Sulfur (S) is 32.1 u

Answer: A

Explanation:

A saturated solution is a chemical solution that contains the highest bound solvent level. In a saturated solution, the extra solution will not dissolve. Depending on a multitude of variables, the quantity of fluid that can we can add in a solvent to create a saturated solution.

Answer:

If you are trying to dissolve a substance, you have three primary avenues to increase the dissolution rate: decreasing the particle size of the solid, increasing the temperature and/or increasing the mixing or stirring rate.

Explanation: