When a substance moves from an area of low concentration to an area of high concentration while using energy, the process is termed.

Explanation:

(Gases and liquids )

is the answer

Gases and liquids are the states of matter that have the same volume when moved.

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Number of electrons in a Ca²⁺ = 18

In an atom there are levels of energy in the shell and sub shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is  

• s: 2 electrons  

• p: 6 electrons  

• d: 10 electrons and  

• f: 14 electrons  

Charging electrons in the sub shell uses the following sequence:  

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  

The element Ca has an atomic number of 20, so the number of electrons and protons (in neutral atoms) is also 20

Electron configuration of Ca : 1s², 2s², 2p⁶, 3s², 3p⁶, 4s² ⇒[Ar] 4s²

When Ca releases 2 electrons to gain stability (forming Ca²⁺ cations), the number of electrons becomes:

\(\tt 20-2 = 18\)

and the electron configuration (Ca²⁺ ) becomes:

1s², 2s², 2p⁶, 3s², 3p⁶

Answer:

The three parts of the nucleotide building block of DNA are the sugar, the base and the phosphate.

Explanation:

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Answer:

three parts of the nucleotide building block of DNA are the sugar, the base and the phosphate.

Answer:

I think it's thermal energy. c:

Answer

Thermal energy transfers occur in three ways: conduction, convection, and radiation. Conduction is when thermal energy is transferred between molecules in contact with one another.

Thermal is the answer.

The difference in electrochemical potential between two electrodes of an electrochemical cell is called as the cell potential.

The potential difference or voltage that exists between two electrodes in an electrochemical cell when no current is flowing through the cell is called the cell potential. Cell potential, also known as electromotive force (emf), is a measure of the driving force that drives a chemical reaction in an electrochemical cell forward.

The potential difference between the anode and cathode of an electrochemical cell is a quantitative measurement of the cell's capacity to generate electrical energy. The cell potential is usually measured in volts (V), and its sign is determined by the direction in which the electrons flow through the cell. When electrons flow spontaneously from the anode to the cathode, the cell potential is positive, whereas if electrons are forced to flow from the cathode to the anode, the cell potential is negative.

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Answer:

0.333J/g°C is the specific heat of the metal

Explanation:

The heat that the metaal gives is equal to the heat that water is absorbing. The equation is:

S(metal)*ΔT(metal)*Mass(metal) = S(H2O)*ΔT(H2O)*Mass(H2O)

Where S is specific heat, ΔT is change in temperature and mass the mass in grams of the metal and water.

Replacing:

S(metal)*(100.0°C-27.2°C)*125.0g = 4.184J/g°C*(27.2°C-24.3°C)*250.0g

S(metal) = 4.184J/g°C*(27.2°C-24.3°C)*250.0g / (100.0°C-27.2°C)*125.0g

S(metal) = 0.333J/g°C is the specific heat of the metal

Answer:

Cl^- = 5.75

K^+ = 7.75

Explanation:

Now let us calculate the effective nuclear charge four K^+ and Cl^- from Slater's rule.

Given that Cl^- and K^+ has electronic configuration of; [Ne] 3s2 3p6 (they are isoelectronic species)

We compute S as follows;

For n - 2 level, S= 1

For n - 1 level, S= 0.85

For ns,np level S= 0.35

Note: S= screening or shielding constant

1s2, S=2 ×1 = 2

2s2 2p6, S= 8×0.85 = 6.8

3s2 3p6, S= 7 × 0.35 = 2.45

The electron under study is not considered hence seven out of eight electrons in the shell are considered

Hence

S= 2 + 6.8 + 2.45 = 11.25

Since Cl^- has 17 electrons;

Zeff(Cl^-) = 17 - 11.25 = 5.75

For K^+

Zeff = 19 - 11.25 = 7.75

None of the carbonyl group is attached to hydrogen atoms.

A ketone is a group in which one carbonyl group is attached to two R ( the alkyl group).

And the group in which two hydrogen is attached to R is called as an aldehyde (formaldehyde). And when one hydrogen and one alkyl group is attached to R. It is called as acetaldehyde from the aldehyde family. Attachment of three and four hydrogens to the carbonyl group is not possible because in the carbonyl group the carbon makes a double bond with oxygen. So a maximum of two hydrogens can be attached to the carbon of the carbonyl. But in ketone, the carbons are attached to carbons, not hydrogens.

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The equation to calculate the equilibrium constant (K) at room temperature is:

K(T) = K(T') * exp((ΔH°/R) * (1/T - 1/T'))

The equation represents the Van 't Hoff equation, which relates the equilibrium constant (K) at two different temperatures, T and T'. In this equation, ΔH° is the standard enthalpy change of the reaction, R is the gas constant, and exp() represents the exponential function.

By using this equation, the equilibrium constant at a desired temperature (T) can be calculated based on the equilibrium constant at a reference temperature (T') and the enthalpy change of the reaction. The equation takes into account the temperature dependence of the equilibrium constant, which is described by the Arrhenius equation.

To calculate the equilibrium constant at room temperature, the specific values of T and T', as well as the standard enthalpy change (ΔH°) for the reaction, would need to be provided. The gas constant (R) has a standard value of 8.314 J/(mol·K).

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Answer: Na

Explanation:

on the left it says Na, and on the right it says Na2

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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Answer:

A

Explanation:

now I'm not sure, but considering negative feedback allows the systems to self stabilize that would be the best option.

PLEASE NOTE THAT THIS IS A EDUCATED GUESS.

Answer:

Dogs naturally lose old or damaged hair by shedding. Although shedding. and yes

CH4 + 2 O2 = CO2 + 2 H2O

i believe it's this :p

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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In de Morceau's nomenclature scheme, the smaller atom appears first.

Nomenclature is an organism name system used in biological classification. Genus and species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species to which the creature belongs.

On August 26, 1743, Antoine-Laurent Lavoisier was born in Paris, France. He was a well-known French chemist and a key player in the 18th century chemical revolution. In addition to co-creating the current system for identifying chemical compounds, he established an experiment-based explanation of the chemical reactivity of oxygen.

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Answer:

15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.

Explanation:

The balanced reaction is:

H₂ (g) + Cl₂ (g) → 2 HCl (g)

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

Then you can apply the following rule of three:  If 1 mole of Cl₂ reacts with 1 mole of H₂, 15 moles of Cl₂ with how many moles of H₂ does it react?

\(moles of H_{2} =\frac{15 moles of Cl_{2} *1mole of H_{2}}{1moles of Cl_{2}}\)

moles of H₂= 15

15 moles of hydrogen gas are needed to react with 15 moles of chlorine gas.

Answer:

Dark matter slows down the expansion of the universe, while dark energy speeds it up

Explanation:

Answer:

CuCI2 is the answer.......

This is a type of bonding that is formed from the from the attraction of oppositely charged ions in a compound.

For instance, MgCl2 is an ionic compound because the 2 positive ions wipossessed by the magnessium atom will attract each of the negtaive ion possessed by each of the chlorine atom to form the magnessium chloride compound

Using the Lewis symbol to demonstrate the bondng:

From the disgram, the negative ions on chlorine atoms will get attracted to the positive ions on the magnessium ion.

Decreased amount of product: When some of the product is spilled, the total amount of product available for weighing is reduced. This means that the measured yield will be lower than the expected yield.

Inaccurate measurement: The spilled product cannot be accurately included in the final yield measurement. This introduces an error in the measurement, as the spilled product cannot be accounted for.

Lower actual yield: As a result of the decreased amount of product and the inaccurate measurement, the actual yield will be lower than the expected yield. The actual yield represents the amount of product obtained after considering any losses, such as spillage or waste.

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Hi,

These are the answers

•Question 6. B, Yogurt and sour milk

•Question 7. B, turn litmus paper red

•Question 8. B, used to find pH of a solution

•Question 9. A, names of products and reactants of a chemical reaction in words

•Question 10. B, feel slippery

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The equilibrium vapor pressure with respect to water (eow) is 259.9 Pa. assume that saturation vapor pressure is same as equilibrium vapor pressure.

Therefore, the RH at the frost point is  

RH = (eow / saturation vapor pressure) × 100

= (259.9 Pa / 259.9 Pa) × 100

= 100%

b) At T = -11 °C, we need to compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi) to determine if ice particles will form. From the given table, at T = -11 °C, the equilibrium vapor pressure with respect to water (eow) is 237.7 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 165.3 Pa.

The air is supersaturated with respect to ice, and the presence of Kaolinite particles can provide surfaces for water droplets to condense onto, leading to the formation of ice particles.

c) At T = -12 °C, we compare the equilibrium vapor pressure with respect to water (eow) and the equilibrium vapor pressure with respect to ice (coi). From the given table, at T = -12 °C, the equilibrium vapor pressure with respect to water (eow) is 217.3 Pa, and the equilibrium vapor pressure with respect to ice (coi) is 181.2 Pa.

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Crust-In geology, the crust is the outermost solid shell of a rocky planet.

Mantle-A mantle is a layer inside a planetary body bounded below by a core and above by a crust.

Core-is the innermost part of the earth, comprised of the inner core, at the center of the earth, made of iron; and b) the outer core, which surrounds the inner core, made of iron and magma.

Lithosphere-rigid, rocky outer layer of the Earth, consisting of the crust and the solid outermost layer of the upper mantle.

Athenosphere-the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.

Mesosphere-the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.

Sea floor spreading-the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.

Plate Tectonics- a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.

Tectonic plates- A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. ... By contrast, oceanic crust is composed of basaltic rocks, which are much denser and heavier.

Convergent boundary- A convergent boundary is an area on Earth where two or more lithospheric plates collide. One plate eventually slides beneath the other causing a process known as subduction.

Divergent boundary- In plate tectonics, a divergent boundary or divergent plate boundary is a linear feature that exists between two tectonic plates that are moving away from each other.

Transform boundary- A transform fault or transform boundary is a fault along a plate boundary where the motion is predominantly horizontal.

Radioactive decay- a radioactive process in which a nucleus undergoes spontaneous transformation into one or more different nuclei and simultaneously emits radiation, loses electrons, or undergoes fission.

Subduction zone- Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle.

Continental drift- Continental drift is the hypothesis that the Earth's continents have moved over geologic time relative to each other, thus appearing to have "drifted" across the ocean bed.

Deformation- the action or process of changing in shape or distorting, especially through the application of pressure.

Folding- A fold is a bend in the rock strata. Folding: Is a type of earth movement resulting from the horizontal compression of rock layers by internal forces of the earth along plate boundaries.

Fault- A fault is a fracture or zone of fractures between two blocks of rock. Faults allow the blocks to move relative to each other. ... Earth scientists use the angle of the fault with respect to the surface (known as the dip) and the direction of slip along the fault to classify faults.

Shear stress- Shear stress is the stress component parallel to a given surface, such as a fault plane, that results from forces applied parallel to the surface or from remote forces transmitted through the surrounding rock.

Tension- in physics, tension is described as the pulling force transmitted axially by the means of a string, a cable, chain, or similar one-dimensional continuous object, or by each end of a rod, truss member

Compression- Compression, decrease in volume of any object or substance resulting from applied stress. Compression may be undergone by solids, liquids, and gases and by living systems.

Syncline- a trough or fold of stratified rock in which the strata slope upward from the axis.

Anticlines- an arch of stratified rock in which the layers bend downward in opposite directions from the crest.

Law of Universal Gravitation- Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

Law of superposition- Law of superposition, a major principle of stratigraphy stating that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.

law of conservation of mass- The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.

Answer:

van Leeuwenhoek called the organisms he saw in his microscope "animalcules." also he shined light on specimen so that he could see the right cells

0.1 M nitrous acid (HNO2) and 0.12 M sodium nitrite (NaNO2) are combined to create a buffer. (Ka=4.5x10-4) After 0.016 mol of NaOH has been added to 1.00 L of the buffer, determine the pH.

A buffer solution, sometimes referred to as a pH buffer or hydrogen ion buffer, is an aqueous combination of a weak acid and its conjugate base, or vice versa. The pH nitrous changes at all when a small amount of a strong acid or basic is added to it. Buffer solutions are used in a wide range of chemical processes to keep pH values almost constant. Buffering is used by many biological systems to regulate pH in the natural world. For instance, the bicarbonate buffering system regulates the pH of blood.

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Answer:

Winter

Explanation:

I dont know but whatev

Answer:

Winter

Explanation:

The seasonal cycle in the polar and temperate zones of one hemisphere is opposite to that of the other. Therefore, When it is summer in the Northern Hemisphere, it is winter in the Southern, and vice versa.

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