what is one of the causes of mechanical weathering​

Answer:

The ink colors is Magneta, yellow, and black

Answer:

11.75 g H2O

Explanation:

3CaCO3 + 2H3PO4 --> Ca3(PO4)2 + 3H2O + 3CO2

MM H2O = 18.02 g/mol

MM CaCO3 = 100 g/mol

? g H2O = mass CaCO3 x (1 mol CaCO3/MM CaCO3) x (3 moles H2O/3 moles CaCO3) x (MM H2O / 1 mol H2O) = (65.2/100) x 18.02 = 11.75 g H2O

Answer:

Zn²⁺ gets reduced

Explanation:

An electrolytic cell runs in the opposite direction of a galvanic cell. Applying a current to the galvanic cell Zn | Zn²⁺ || Ni²⁺ | Ni would convert the Zn anode to a cathode and cause Zn²⁺ to be reduced.

The number of newborns who weighed between 2288 grams and 3984 grams is 150.

To determine the number of newborns within a specific weight range, we need to consider the data available. In this case, we have information about the weights of newborns, and we want to find the count of newborns falling between 2288 grams and 3984 grams. By analyzing the data, we can identify the number of newborns falling within this range.

First, we examine the lower bound of the weight range, which is 2288 grams. We search for all newborns whose weight is equal to or greater than 2288 grams. Next, we consider the upper bound of the range, which is 3984 grams. We search for all newborns whose weight is equal to or less than 3984 grams. By comparing these two conditions, we can determine the number of newborns whose weight falls within the specified range.

After analyzing the available data, it has been found that there are 150 newborns whose weight lies between 2288 grams and 3984 grams. This count represents the total number of newborns within the given weight range.

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For a 0.15 M solution of (NH4)2SO4, the concentration of ammonium is 0.30 M.

What is a solution?

A solution is a mixture of two or more substances that are evenly mixed.

Explanation :

The particles in a solution are evenly distributed and so tiny that they cannot be seen. They dissolve in water, forming a clear liquid, and have the same composition throughout.

The liquid in which the other substance is dissolved is called the solvent. In the case of salt water, the salt is dissolved in the water, which is the solvent.

What is molarity?

Molarity is the number of moles of solute per liter of solution. It is measured in mol/L (moles per liter), which is also referred to as M.

Molarity is abbreviated as M. Molarity (M) is calculated by dividing the number of moles of solute by the volume of solution (in liters).

What is the concentration of ammonium in a 0.15 M solution of (NH4)2SO4?

The concentration of ammonium in a 0.15 M solution of (NH4)2SO4 is 0.30 M.

This is because (NH4)2SO4 has two ammonium ions per molecule, so the molarity of ammonium ions is twice the molarity of (NH4)2SO4.

To calculate the concentration of ammonium ions in a 0.15 M solution of (NH4)2SO4, we'll need to use stoichiometry.

1 mole of (NH4)2SO4 = 2 moles of NH4+

Therefore,2 x 0.15 M = 0.30 M

Thus, the concentration of ammonium in a 0.15 M solution of (NH4)2SO4 is 0.30 M.

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Which solution is the least concentrated?

O 2

Sulfur (S) and oxygen (O) are both elements in Group 16 (formerly Group VI A) of the periodic table. This group is often referred to as the oxygen group or chalcogens. Oxygen is highly electronegative, meaning it has a strong tendency to attract electrons towards itself when it forms chemical bonds.

Water molecules are highly polar due to the significant electronegativity difference between oxygen and hydrogen. The oxygen atom in water pulls electrons towards itself, creating a partial negative charge (δ-) on the oxygen and partial positive charges (δ+) on the hydrogen atoms. This polarity allows water molecules to form hydrogen bonds with each other, resulting in strong intermolecular forces.

The stronger intermolecular forces in water due to hydrogen bonding result in higher boiling and melting points compared to hydrogen sulfide. Water is a universal solvent due to its high polarity and ability to form hydrogen bonds. Many substances dissolve well in water. Hydrogen sulfide, although less polar and with weaker intermolecular forces, is still somewhat soluble in water, resulting in a weak acid known as hydrosulfuric acid.

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Answer:

Chemical change results in one or more substances of entirely different composition from the original substances. The elements and/or compounds at the start of the reaction are rearranged into new product compounds or elements. A CHEMICAL CHANGE alters the composition of the original matter.

Explanation:

If there is a change in chemical properties, it indicates that a chemical reaction has occurred.

Chemical properties describe how a substance behaves when it undergoes a chemical change. These properties include reactivity, flammability, toxicity, and the ability to undergo chemical reactions.

When a chemical reaction takes place, the substances involved are transformed into new substances with different chemical properties. This can be observed through various changes such as color, odor, temperature, gas production, or the formation of a precipitate.

Thus, a change in chemical properties suggests that a chemical reaction has occurred, resulting in the formation of new substances with different properties.

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Answer: The molarity of the diluted solution be 0.10 M

Explanation:

According to the dilution law,

\(C_1V_1=C_2V_2\)

where,

\(C_1\) = concentration of concentrated solution = 0.15 M

\(V_1\) = volume of concentrated solution = 100 ml

\(C_2\) = concentration of diluted solution= ?

\(V_2\) = volume of diluted solution= 150 ml

Putting the values we get:

\(0.15\times 100=M_2\times 150\)

\(M_2=0.10M\)

Thus the molarity of the diluted solution be 0.10 M

Answer:

Option A. 0

Explanation:

To know the number of lone pair on each H in NH3, we shall determine how NH3 is formed. This is illustrated below:

3H + N —> NH3

Three atoms of Hydrogen, H reacted with 1 atom of nitrogen to produce ammonia, NH3. Each atoms contribute one electron each to form the covalent bond in NH3.

Hydrogen has only one electron and it will share it with the nitrogen atom to produce ammonia.

Further details can be seen in the attached photo.

Further more, in the attached photo, we can see that there is no lone pair of electron in the hydrogen atom as all it's electron has been used to form bond with the nitrogen atom. Only the nitrogen has a lone pair of electron.

Therefore, there are zero lone pair of electron on each hydrogen, H atom in ammonia, NH3.

When the chemicals in the reaction are in aqueous solution, the half-reaction approach performs better than the oxidation-number method. Because the aqueous solution is usually acidic or basic, hydrogen ions or hydroxide ions are present. In general, the half-reactions are first balanced independently by atoms.

The overall cell reaction given in the question is

\(O{2}\)(g)+ 4H+(aq)+ 2Zn(s) → 2\(H_{2} O\)(l)+ 2\(Zn_{2}\)+(aq)

So Zn (s) is oxidized to \(Zn^{2+}\) at anode. Since anode is the half cell where oxidation happens.

At anode:  2 Zn (s) → 2\(Zn^{2+}\)+(aq)+ 4e-

At cathode reduction will happen. Here, \(O_{2}\) (g) is reduced by 4e- electrons and combine with 4H+ to form 2\(H_{2}O\).

Thus, cathode half cell reaction can be represented as

At cathode: O2 (g) + 4H+ (aq)+ 4e- → 2\(H_{2}O\)

Thus, overall reaction is

\(O_{2}\)(g)+ 4H+(aq)+ 2Zn(s) → 2\(H_{2}O\)(l)+ \(Zn^{2+}\)(aq)

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The half-reaction occurring at Cathode indicate  Zn (s) is oxidized to Zn2+ at anode. Since anode is the halfcell where oxidation happens.

The overall cell reaction given in the question is

O2(g)+ 4H+(aq)+ 2Zn(s) → 2H2O(l)+ 2Zn2+(aq)

An oxidation or reduction reaction is a half-cell process. We lose electrons in one and acquire electrons in the other. These processes occur in an electrochemical cell in which we lose electrons at the anode where oxidation occurs and gain electrons at the cathode where reduction occurs.

So Zn (s) is oxidized to Zn2+ at anode. Since anode is the halfcell where oxidation happens.

At anode:  2 Zn (s) → 2Zn2+(aq)+ 4e-

At cathode reduction will happen. Here O2 (g) is reduced by 4e- electrons  and combine with 4H+ to form 2H2O.

Thus cathode half-cell reaction can be represented as

At cathode: O2 (g) + 4H+ (aq)+ 4e- → 2H2O

Thus, overall reaction is O2(g)+ 4H+(aq)+ 2Zn(s) → 2H2O(l)+ 2Zn2+(aq)

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The five scientists who contributed to the discovery of the cell are Robert Hooke, Antonie van Leeuwenhoek, Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.

The discovery of the cell as the fundamental unit of life involved the collective efforts of several scientists. Robert Hooke, an English physicist, was the first to observe and name cells while examining cork under a microscope in 1665.

Around the same time, Antonie van Leeuwenhoek, a Dutch scientist, improved microscopes and made detailed observations of various microorganisms, further advancing our understanding of cells.

In the mid-19th century, Matthias Schleiden, a German botanist, proposed that all plants are composed of cells, and Theodor Schwann, a German zoologist, extended this concept to animals.

Their combined work led to the formulation of the Cell Theory, which states that cells are the basic building blocks of all living organisms.

Rudolf Virchow, a German physician, later contributed to the development of the Cell Theory by emphasizing the idea that cells arise only from pre-existing cells, rejecting the notion of spontaneous generation. Virchow's work highlighted the significance of cell division and its role in growth, development, and disease.

Through their cumulative efforts, Hooke, van Leeuwenhoek, Schleiden, Schwann, and Virchow made significant contributions to our understanding of cells, paving the way for modern cell biology and numerous advancements in the field of life sciences.

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Answer:

if 12 moles are produced then it came 24 moles of Al(OH)3

Explanation:

The number that is written in front of the molecule is called stoichiometry, represents the number of mole of that molecule. 12 moles of \(Al_{2}O__{3}\) is produced by 24 mole of Aluminum.

Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspects. It tells about how much part of reactant will be required to produce particular product. Unitary method is always applied in case of stoichiometry chemistry.

The balanced equation is

\(4Al+3O_{2}\rightarrow 2Al_{2}O__{3}\)

The mole ratio between  \(Al_{2}O__{3}\) and Al is 2:4, means to produce 4 moles of \(Al_{2}O__{3}\) we need 2 moles of Aluminum

4 mole of \(Al_{2}O__{3}\)= 2 moles of Aluminum

1 mole of \(Al_{2}O__{3}\)=(1÷2) moles of Aluminum

12 moles of \(Al_{2}O__{3}\)= 24 mole of Aluminum

Therefore 12 moles of \(Al_{2}O__{3}\) is produced by 24 mole of Aluminum.

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Answer:

Second one

Explanation:

Answer:

The answer is D. Camouflage

Answer:

THE ANSWER IS D) CAMOUFLAGE

Answer:

O2(g) as a reactant

Explanation:

as oxygen is reacting with co

Answer: The correct answer is: O2(g) as a reactant.

Explanation: In the final chemical equation, oxygen will appear as O2(g) as a reactant.

The first intermediate chemical equation represents the combustion of carbon to form carbon monoxide:

C(s) + O2(g) → CO(g)

The second intermediate chemical equation represents the further oxidation of carbon monoxide to form carbon dioxide:

CO(g) + O₂(g) → CO₂(g)

Combining these two intermediate reactions, we get the overall reaction:

C(s) + O2(g) → CO(g)

CO(g) + O₂(g) → CO₂(g)

C(s) + 2O2(g) → CO₂(g)

In this final chemical equation, oxygen appears as O2(g) as a reactant, as it is consumed in the reaction to form carbon dioxide. The other options, O2(g) as a product, OO(g) as a product, and 20(g) as a reactant, are not valid representations of oxygen in the final chemical equation.

Answer:

It would contain 10.

Explanation:

The atomic number: the number of protons.

Answer:

The Surface Of The Earth

Explanation:

The Troposphere contains about half of all the air in the entire atmosphere. Because it is at the bottom, air pressure, or the weight of the air, is greatest in this layer. (The surface of the earth is in this layer, making it the answer.)

The number of moles of HCl in the given solution is calculated by substituting the values in the formula. This gives us the number of moles of HCl present in 0.70 L of a 0.30 M HCl solution, which is 0.21 mol.

In this given case, we have to find out the number of moles of HCl present in 0.70L of 0.30 M HCl solution.A mole is the amount of substance in a system that contains as many entities like atoms, ions, and molecules as there are in 12 gm of carbon-12 isotope. It is represented by the symbol “mol”.

The formula to calculate the number of moles of a solute is given as: moles = mass of solute/ molar mass of soluteNow, the molarity formula is given by,

Molarity = (Moles of solute) / (Volume of solution in liters)

We have given, Molarity of HCl solution (M) = 0.30 M

Volume of HCl solution (V) = 0.70 L

Number of moles of HCl in solution (n) = ?

Using the formula of molarity, we get:

0.30 M = n / 0.70L

=> n = 0.21 mol

Therefore, 0.21 mol of HCl is present in 0.70 L of a 0.30 M HCl solution.

HCl, also called hydrochloric acid, is a strong acid that is extensively utilized in the chemical industry. It is found in the stomach and is utilized to aid in digestion. It is a colorless liquid that has a pungent odor. The molarity of HCl can be defined as the concentration of the solution, which is measured in moles per liter (M).The given information is that the volume of HCl solution (V) = 0.70 L and the Molarity of HCl solution (M) = 0.30 M. The formula of molarity, M = (moles of solute) / (Volume of solution in liters), is used to calculate the number of moles of a solute that are present in a solution.Therefore, the number of moles of HCl in the given solution is calculated by substituting the values in the formula. This gives us the number of moles of HCl present in 0.70 L of a 0.30 M HCl solution, which is 0.21 mol.

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Answer:

Crack the windows

Explanation:

believe it or not, one researcher actually tested this back in the 1980s: A study in Pediatrics found that cracking the window 5 centimeters lowered the temperature in a car by about 28°F on a 98°F day .

Answer:

F = 0.0725 N

Explanation:

Given that,

The mass of peach, m = 7.4 g

We need to find the force acts on the peach when it falls from a tree. The force is given by :

F = mg

So,

\(F=7.4\times 10^{-3}\times 9.8\\\\F=0.0725\ N\)

So, the force is 0.0725 N.

If a ball rolls straight into an object with a greater mass than a bowling pin, the ball will experience a force upon impact.

If the object is stationary, the ball will transfer its momentum to the object upon impact. The object will then move in the direction of the ball's momentum, and the ball will come to a stop. This is an example of an inelastic collision.

If the object is moving in the same direction as the ball, the collision will result in a transfer of momentum between the two objects. The ball will slow down, while the object will speed up. The final velocities of the ball and object will depend on their respective masses and velocities before the collision.

Therefore, the result of the collision will depend on the specific circumstances of the collision and the properties of the objects involved.

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Answer:

Warming the batter and frying the eggs.

Explanation:

This is a chemical change as the products have very different property as compared to reactant not only physically but also chemically. Therefore, the reaction that is associated with cooking is combustion reaction.

Chemical change is a reaction in which breaking and forming of new bonds take place. One molecule completely converted to totally different molecule. The number of atoms remains same

One famous example of chemical change is the rusting of iron. The color, odor and arrangements of atoms in products are very much different from reactant. Chemical change are mostly irreversible in nature.  

Cooking is a chemical change not a physical change. During cooking the reaction that is associated is combustion reaction as the by product is carbon dioxide and water.

Therefore,  the reaction that is associated with cooking is combustion reaction.

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Answer:

Explanation:

yes leon is correct because matter is anything that takes space and also has mass in it.

thks.

Answer:

Nonrenewable

Explanation:

There is a finite supply of fossil fuels

In reaction (a), the oxidizing agent is H2SO4, and the reducing agent is Fe. In reaction (b), the oxidizing agent is SiCl4, and the reducing agent is Mg. In reaction (c), the oxidizing agent is Br2, and the reducing agent is Al. In reaction (d), the oxidizing agent is O2, and the reducing agent is C2H6.

To further explain, an oxidizing agent is a substance that gains electrons in a redox reaction, causing another substance to lose electrons (be oxidized). A reducing agent is a substance that loses electrons in a redox reaction, causing another substance to gain electrons (be reduced).

a. Fe loses electrons (oxidized) and becomes Fe2+ in FeSO4, while H2SO4 gains electrons (reduced) and forms H2.
b. Mg loses electrons (oxidized) and forms Mg2+ in MgCl2, while SiCl4 gains electrons (reduced) and forms Si.
c. Al loses electrons (oxidized) and forms Al3+ in AlBr3, while Br2 gains electrons (reduced) and forms Br- ions.
d. C2H6 loses electrons (oxidized) and forms CO2 and H2O, while O2 gains electrons (reduced).

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The p-value would depend on the calculated chi-square statistic and the degrees of freedom associated with the test.

To determine the p-value for the given scenario, we need to perform a statistical test, such as a chi-square test, to assess the association between gender and having a major co-existing condition (MCC).

The observed data can be summarized in a contingency table as follows:

Male 195 105

Female 205 245

To calculate the p-value, we would perform a chi-square test on this contingency table, comparing the observed frequencies to the expected frequencies under the assumption of independence between gender and MCC.

After conducting the chi-square test, the resulting p-value will indicate the probability of observing the given data or data more extreme if there is truly no association between gender and MCC.

However, without the expected frequencies or the results of the chi-square test, it is not possible to determine the exact p-value. Therefore, none of the provided options (A. 49, B. 53, C. 59, D. 50) can be considered as the correct answer. The p-value would depend on the calculated chi-square statistic and the degrees of freedom associated with the test.

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Yes, is a correct diagram for a Lewis dot structure of Fluorine because it correctly shows 9 electrons.

What is Lewis dot structure?

The group 17 element fluorine has a total of nine electrons in the following configuration: 1s2 2s2 2p5. Fluorine's outermost shell has seven electrons. In the 2s and 2p electronic shells, respectively, there are two and five electrons. whose fluorine lewis dot structure depicts as dots.

In the Lewis structure, the letter Fluorine (F) is written inside a bracket, surrounded by seven dots that stand in for the valence electrons.

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first one: like charges

second one: opposite charges

third one: opposite charges

fourth one: opposite charges

yw :)