consider the reaction when aqueous solutions of ammonium phosphate and chromium(ii) acetate are combined. the net ionic equation for this reaction is:

Answer:

6.02 × 10^23 molecules = 1 mole

5.27 × 10^45 molecules = x

x = 5.27 × 10^45/ 6.02 × 10^23 × 1

= 8.754 × 10^21 mol

I don't know if it's correct but based on the question that was the only way I saw how to work it out

Answer:

The answer would probably be C. The clock can be seen and heard.

Answer:

1,354

Explanation:

Approximately 148.59 grams of carbon dioxide could be made.The remaining reactant, since \(O_2\)is the limiting reactant, all the CO will not be completely consumed. There would be no CO leftover as it is completely consumed in the reaction.

To determine the grams of carbon dioxide produced, we need to identify the limiting reactant first. The balanced chemical equation for the reaction is:

2 CO +\(O_2\) -> 2 \(CO_2\)

To find the limiting reactant, we compare the number of moles of each reactant and determine which one is present in a lower amount relative to the stoichiometry of the reaction.

First, we convert the given volumes of gases to moles using the ideal gas law equation:

n = PV / RT

where:

n = number of moles

P = pressure

V = volume

R = ideal gas constant

T = temperature

Assuming the reaction takes place at standard temperature and pressure (STP), which is 273.15 K and 1 atm, we can use the values to convert the volumes to moles:

For carbon monoxide (CO):

n(CO) = (75.3 L) / (22.414 L/mol) = 3.36 moles

For oxygen (O2):

n(O2) = (38.0 L) / (22.414 L/mol) = 1.69 moles

According to the balanced equation, the stoichiometry of the reaction is 2:1 for CO to \(O_2\)This means that for every 2 moles of CO, we need 1 mole of \(O_2\). In this case, the ratio of moles is 3.36:1.69, which shows an excess of CO.

To find the limiting reactant, we compare the mole ratio to the stoichiometry ratio. Since there is a surplus of CO, it is the excess reactant, and\(O_2\)is the limiting reactant.

To determine the amount of carbon dioxide produced, we use the stoichiometry of the reaction. From the balanced equation, we know that for every 2 moles of CO, 2 moles of CO2 are produced.

Since\(O_2\) is the limiting reactant, we use its moles to calculate the moles of \(Co_2\)produced:

n(\(CO_2\)) = 2 * n(\(O_2\)) = 2 * 1.69 moles = 3.38 moles

Finally, we convert the moles of\(CO_2\) to grams using the molar mass of carbon dioxide, which is 44.01 g/mol:

mass(\(CO_2\)) = n(\(CO_2\)) * molar mass(\(CO_2\) = 3.38 moles * 44.01 g/mol ≈ 148.59 grams

Therefore, approximately 148.59 grams of carbon dioxide could be made.

As for the remaining reactant, since \(O_2\)s the limiting reactant, all the CO will not be completely consumed. To determine the amount of CO leftover, we subtract the moles of CO used from the initial moles of CO:

Remaining moles of CO = Initial moles of CO - Moles of CO used

Remaining moles of CO = 3.36 moles - 2 * 1.69 moles ≈ 0 moles

Thus, there would be no CO leftover as it is completely consumed in the reaction.

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Experiment to determine best solvent for ink stain removal: soak 4 identical cloths with ink stains in nail polish remover, rubbing alcohol, soap+water, and water, observe stain removal, repeat 3 times, analyze results to find best solvent.

Here's a plan for an experiment to identify which solvent is best for removing an ink stain from a white blouse:

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Gene conversion is a process that can occur during DNA replication where one DNA strand is used as a template to repair the other strand. This process can lead to the exchange of genetic information between identical or nearly identical sequences.

Gene conversion helps to maintain identical sequences in tandem repeated genes by facilitating the process of homogenisation. This occurs when one of the tandem repeated genes copies its sequence onto another tandem repeat, resulting in identical sequences among the repeats.

The steps involved in this process are as follows:
1. Tandem repeated genes are genes that are arranged sequentially in the genome and have similar sequences.
2. During DNA replication or repair, homologous recombination can occur between tandem repeated genes, leading to gene conversion.
3. Gene conversion is a non-reciprocal exchange of genetic material between the tandem repeated genes, where one gene's sequence is replaced by the sequence of another gene in the tandem array.
4. As a result of gene conversion, the sequence of one tandem repeat is copied onto another tandem repeat, causing them to have identical sequences.
5. This process ensures that the sequences of tandem repeated genes remain similar over time, as any variations that arise through mutation can be "corrected" through gene conversion.

In summary, gene conversion can help maintain identical sequences by replacing any mutated or divergent sequences with the original sequence. This is because the repeated genes are often located close together on the chromosome, making it easier for gene conversion to occur. As a result, the repeated genes can remain identical over time, even as mutations accumulate in other parts of the genome. Overall, gene conversion plays an important role in maintaining the stability and integrity of tandem repeated genes.

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The correct description of the boiling point of a liquid is a phase change from a liquid to a gas occurring at a specific temperature and pressure.

The correct option is B.

The temperature at which a liquid's vapor pressure equals the pressure of the gas above it is known as the boiling point of the liquid. The temperature at which a liquid's vapor pressure equals one atmosphere is considered the liquid's typical boiling point (760 torrs).

When a liquid is at its boiling point, further addition of heat does not result in a temperature increase until all the liquid undergoes a phase change to gas.

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Complete question:

Which of the following describes a boiling point?

A. Phase change from a solid to a liquid occurring at a specific temperature and pressure B. Phase change from a liquid to a gas occurring at a specific temperature and pressure c. Phase change from a gas to a liquid occurring at a specific temperature and pressure D. Phase change from a solid to a gas occurring at a specific temperature and pressure

The dissociation of strontium sulfate (SrSO₄) in water can be represented by the following equation: SrSO₄ (s) ⇌ Sr²⁺ (aq) + SO₄²⁻ (aq)

In this equation, the solid strontium sulfate (SrSO₄) dissociates into its respective ions: the strontium cation (Sr²⁺) and the sulfate anion (SO₄²⁻). When the compound is placed in water, it dissociates into its ions, which are now in the aqueous phase, represented by the (aq) notation. The double arrow (⇌) indicates that the dissociation is a reversible process, meaning that the ions can recombine to form the original compound.

The extent of dissociation depends on the solubility of strontium sulfate in water, which is relatively low. This means that only a small amount of SrSO₄ will dissolve in water, while the majority of it remains undissolved as a solid. The solubility product constant (Ksp) can be used to quantify the solubility of sparingly soluble salts like SrSO₄. It is defined as the product of the equilibrium concentrations of the constituent ions raised to the power of their stoichiometric coefficients. For SrSO₄, the Ksp expression can be written as:

Ksp = [Sr²⁺] [SO₄²⁻]

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Answer:

5.7 pH

Explanation:

To find pH when given [H+], you use this formula: pH = -log[H+]

-log * 2.1e-6 = 5.6778 = 5.7 pH

lose 6 because you lose 6

Answer:

B. Lithium (Li) and iodine (1)

Explanation:

Ionic bond is a type of chemical bond that is formed between a metallic element and a non metallic element. The positive charge of the metallic ion is attracted to the negative charge of the non metallic ion to form an ionic bond.

According to the options given in this question, lithium and iodine will form an IONIC bond because lithium is a cation (+ve ion) while iodine is an anion (-ve).

Answer:

The correct answer is C 112

Explanation:

I just took the test good luck :)

Answer:

I think it is 112

In a a cation-exchange resin, the outlet stream leaving the bed will contain \(H^{+}\) and \(CO_3 ^{2-}\).

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To solve this we must be knowing each and every concept related to environment.  Therefore, the correct option is option D among all the given options.

A basic definition of such an environment is a system that includes all abiotic and biotic components that impact human existence. All flora and animals are biotic components, whereas abiotic components comprise water, sunshine, air, temperature, and so on.

An environment's resources might be any issue, service, or specifics that are beneficial to society and humans. They might be anything that meets the demands of daily living.   Lime can be used to adjust the pH in lakes that are too acidic demonstrates how chemicals can help the environment.

Therefore, the correct option is option D.

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Answer:

The gas will occupy a volume of 1.702 liters.

Explanation:

Let suppose that the gas behaves ideally. The equation of state for ideal gas is:

\(P\cdot V = n\cdot R_{u}\cdot T\) (1)

Where:

\(P\) - Pressure, measured in kilopascals.

\(V\) - Volume, measured in liters.

\(n\) - Molar quantity, measured in moles.

\(T\) - Temperature, measured in Kelvin.

\(R_{u}\) - Ideal gas constant, measured in kilopascal-liters per mole-Kelvin.

We can simplify the equation by constructing the following relationship:

\(\frac{P_{1}\cdot V_{1}}{T_{1}} = \frac{P_{2}\cdot V_{2}}{T_{2}}\) (2)

Where:

\(P_{1}\), \(P_{2}\) - Initial and final pressure, measured in kilopascals.

\(V_{1}\), \(V_{2}\) - Initial and final volume, measured in liters.

\(T_{1}\), \(T_{2}\) - Initial and final temperature, measured in Kelvin.

If we know that \(P_{1} = 121\,kPa\), \(P_{2} = 202\,kPa\), \(V_{1} = 2.7\,L\), \(T_{1} = 288\,K\) and \(T_{2} = 303\,K\), the final volume of the gas is:

\(V_{2} = \left(\frac{T_{2}}{T_{1}} \right)\cdot \left(\frac{P_{1}}{P_{2}} \right)\cdot V_{1}\)

\(V_{2} = 1.702\,L\)

The gas will occupy a volume of 1.702 liters.

After being mixed with 50.0 L of NaCl solution, the KOH solution's final molarity is 0.45 M.

We can apply the principle of dilution to ascertain the ultimate molarity of the KOH solution. The dilution equation is:

M₁V₁ = M₂V₂

Where:

M1 is the solution's initial molarity (KOH).

V1 is the solution's starting volume (in KOH).

M2 is the solution's final molarity (KOH).

V2 is the solution's total volume (in KOH).

Given:

Initial KOH solution volume (V1) is 10.0 L.

KOH solution's initial molarity (M1) is 2.7 M.

After incorporating NaCl solution, the KOH solution's final volume (V2) equals 10.0 L plus 50.0 L, or 60.0 L.

These values are substituted in the dilution equation:

(2.7 M)(10.0 L) = (M₂)(60.0 L)

27.0 = 60M₂

Calculating M2:

M₂ = 27.0 / 60 = 0.45 M

Therefore, after adding 50.0 L of NaCl solution, the KOH solution's final molarity or molar concentration is 0.45 M.

It's vital to note that this estimate is based on the supposition that the quantities are additive and that NaCl and KOH do not react. Furthermore, no departures from ideal behaviour are taken into consideration in this calculation, which is predicated on perfect behaviour.

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Sodium chloride has the highest melting point while iodine has the least melting point.

The melting points of solid substances depends on the nature of intermolecular forces that exists in the substance. The stronger the magnitude of intermolecular forces in a substance, the higher its melting point.

The order of melting points of the solids shown in question is as follows;

Sodium chloride has the highest melting points because it is an ionic substance. Among the molecular sucrose and paraffin, sucrose has a higher melting point than sucrose because it has a greater molar mass. Iodine, a molecular substance has the least molar mass and the least melting point in the list.

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Answer:

A.

The sound is transmitted through water until it reaches the other whale.

Explanation:

When one whale makes a sound, the sound is transmitted through water until it reaches the other whale. The sound causes a ripple-like effect in the water, producing waves that travel in the water. The waves are heard in all directions. This is why humans can hear the sounds animals make underwater.

The statement which best describes how the sound gets to the other whale is that all of the sounds absorbed by water change to heat before getting to the other whale. Thus, the correct option for this question is A.

The transmission of sounds is generally carried out through a medium in the form of waves. These sound waves involve the pattern of disturbance caused by the movement of energy.

In an aquatic environment, when one whale successfully constructs a sound, the sound is effectively transmitted through the medium that is known as water.

It remains in the form of waves until it reaches the other whale. The sound in a waveform provokes a ripple-like effect in the water and travels in the water. The waves are effectively heard in all directions.

Therefore, the correct option for this question is A.

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Answer:

use the meaning of the word see what is similar and what is different about them

Oxygen and calcium react to generate calcium oxide. The chemical made of calcium and oxygen has the formula CaO. This reaction's chemical formula is 2Ca + O2 2CaO.

the eight types of chemical reactions that are most frequently encountered are: decomposition reaction, combination reaction, combustion reaction, single displacement reaction, double displacement reaction, precipitation reaction, and redox reaction.

The evolution of a gas, precipitate formation, color change, temperature change, and state change are significant aspects.

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Answer:

See explanation

Explanation:

The laboratory provides a controlled environment for scientific studies. In the field, it is more difficult to control extraneous variables. Extraneous variables are other variables which are not the independent variable but could inadvertently affect the dependent variable.

Extraneous variables are better controlled in the secluded environment of a laboratory better than they could be controlled in the field. This makes it more difficult to have control variables in the field than it is to have them in the laboratory. Recall that control variables are variables that must remain unchanged throughout the study.

Answer:

first identify the cation and write down its symbol and charge. Then, identify the anion and write down its symbol and charge.

Explanation:

Answer:

2 NH3 + H2SO4 = (NH4)2SO4

Explanation:

The reaction type is synthesis

Answer:

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Yes,a plane mirror can form a real image. A plane mirror can form a real image only for a virtual object. These converging rays of incidents light after reflection intersect at a point to give a real image.

hope helpful~

Plane mirrors always produce virtual images, because they never focus light into a single converging point.

Hence it does not produce real object or image

As power of the plane mirror is zero, hence, it neither converges nor diverges the rays.

Answer:

Chemical Family means a group of elements in the Periodic Table or, more commonly, compounds that share certain physical and chemical characteristics and have a common name.

A period in the periodic table is a row of chemical elements.

metalloid is an element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.

The main component in a cement slab in a house is typically Portland cement.

Key points:

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Answer:

approximately 27 days

Explanation:

cerebrum: interprets touch, vision, hearing, speech, etc.

cerebellum: coordinate muscle movements, posture, and balance

brainstem: connects cerebrum and cerebellum. performs automatic functions, breathing, body temperature, sneezing, etc.

Answer:

Ae4

Explanation:

which virtually showed the reaction between group 4 element and group 7 element