As a pure element the oxidation number of magnesium (Mg)is _____, but in compounds such as MgCl2 its oxidation number is _____.O 0,+1O +2,0O 0.+2O +1.0

Answer:

I'm sorry, you didn't post the pictures.

Answer:

A

Explanation:

the boat does not have a force to counter act the boys it must give which means it moves cause it is one something that is not as dense as the boy (I THINK)

ANSWER

EXPLANATION

Firstly, we need to define the word titration.

Titration is defined as a technique that is used to determine the known concentration of an unknown solution.

This normally occurs between an acid and a base

During titration, an indicator changes color when equilibrium has been attained between the two solutions. The solutions are normally acid and base. At equilibrium, the number of moles of acid is equal to the number of base.

Therefore, the correct answer is option C

A chemical reaction wherein two molecules combine to form one larger product is called a condensation reaction.

The process of joining two or more atoms or molecules to form a single product is known as a chemical reaction. These reactions can be divided into two categories: combination and decomposition reactions.

During the process of condensation reaction a small molecule is eliminated as a byproduct, such as water or alcohol.

The condensation reaction can be utilized to create a variety of polymers by joining smaller monomers together into more complex molecules.

This reaction can be utilized to create peptide bonds between amino acids in proteins, ester bonds between carboxylic acids and alcohols, and glycosidic bonds between sugars, for example.

In addition to the condensation reaction, there are other types of chemical reactions.

For example, Hydrolysis, decomposition, single displacement, double displacement, acid-base, redox, and oxidation reactions are all examples of different types of chemical reactions.

In summary, a chemical reaction wherein two molecules combine to form one larger product is called a condensation reaction.

This process is used to create a variety of polymers by joining smaller monomers together into more complex molecules.

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Answer:

Tectonic plates

Explanation:

All the natural disasters like earthquakes, volcanoes and geysers appear throughout the region of New Zealand because of the movement of tectonic plates underneath the surface. New Zealand rests on the edges of two tectonic plates including the Pacific and the Australian plates.

Answer:

D. The table pushes up on the vase with the same amount of force as gravity pulling it down

Explanation:

Nitration of chlorobenzene has a reaction rate that is slower than the nitration rate of benzene and gives primarily the meta-substituted product(s).

The nitration of chlorobenzene is slower compared to the nitration of benzene due to the presence of the electron-withdrawing chlorine atom. Chlorine's electron-withdrawing nature reduces the electron density on the benzene ring, making it less reactive towards electrophilic substitution reactions like nitration.

The nitration reaction involves the substitution of a nitro group (-NO2) for a hydrogen atom on the benzene ring. In the case of chlorobenzene, the chlorine atom directs the incoming nitro group to the meta position, resulting in the formation of the meta-substituted product as the major product.

This is because chlorine is a meta-directing group, meaning it favors substitution at the meta position relative to the chlorine atom. Overall, the nitration of chlorobenzene is slower and leads to the predominant formation of the meta-substituted product.

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Answer:

Braconid wasps lay eggs on the tomato hornworm caterpillar's body. The larvae that hatch from the eggs start feeding on the tissue of the caterpillar. What type of ecological relationship do both the organisms share?

The gland that can be precisely controlled, and its amount of secretion and the area of the body involved can be varied independently is the **sweat gland**.

Sweat glands are distributed all over the body and are controlled by the autonomic nervous system. The amount of sweat secreted and the area of the body involved can be regulated by the sympathetic nervous system, which is responsible for the "fight or flight" response. This means that the body can vary the amount of sweat produced in different areas of the body depending on the situation, such as in response to exercise or heat. The secretion of sweat is also under hormonal control, with hormones such as adrenaline and cortisol increasing sweat production. Overall, sweat glands play an important role in regulating body temperature and maintaining homeostasis.

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Typically non-metals are not able to conduct electricity or heat very well and are often gases, such as oxygen, or solids, like carbon. Therefore, non-metals are the elements in groups 14-16 of the periodic table.

There are 3.98 × 10^23 atoms of oxygen in the sample.

Given that;

1 mole of Mo(NO3)6 contains 6.02 × 10^23 atoms of Nitrogen

x moles of Mo(NO3)6 contains 2.22 x 10^22 atoms of nitrogen

x = 1 mole × 2.22 x 10^22 atoms/6.02 × 10^23 atoms

x = 0.0368 moles

The number of oxygen atoms in the sample is given by; 0.0368 × 6.02 × 10^23 × 18

Therefore, there are 3.98 × 10^23 atoms of oxygen in the sample.

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A 3.5 L sample of carbon dioxide will have a mass of 7.0 grams.

To find the mass of a carbon dioxide sample, we can use the density formula:

Density = Mass / Volume

Rearranging the formula to solve for mass:

Mass = Density * Volume

Density of carbon dioxide = 2.0 g/L

Volume of the sample = 3.5 L

Substituting the values into the formula:

Mass = 2.0 g/L * 3.5 L

Mass = Density * Volume

Mass = 2.0 g/L * 3.5 L

Mass = 7.0 g

Therefore, a 3.5 L sample of carbon dioxide will have a mass of 7.0 grams.

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Answer:

m = 13.6 kg

Explanation:

Given that,

Volume, V = 1 L

The density of the liquid is, d = 13.6 g/cm³

We know that, 1 L = 1000 cm³

The formula of density is given by :

Density=mass/volume

\(m=d\times V\\\\m=13.6\ g/cm^3\times 1000\ cm^3\\\\m=13600\ g\\\\\text{or}\\m=13.6\ kg\)

So, the mass of liquid is 13.6 kg.

Calcium hydroxide, also known as slaked lime, is an important component in mortar, plaster, and cement. It is widely used in various industries due to its strong and inexpensive base properties. The molar solubility of Ca(OH)2 in water is approximately 11.0 mg/L.

The molar solubility of Ca(OH)2 in water can be determined using the Ksp (solubility product constant), which is given as 2.9 × \(10^{-6}\) in this case.
First, we set up the chemical equation for the dissolution of Ca(OH)2:
Ca(OH)2 (s) ⇌ Ca²⁺ (aq) + 2OH⁻ (aq)
Next, let x represent the molar solubility of Ca(OH)2. This means that at equilibrium, the concentration of Ca²⁺ is x mol/L, and the concentration of OH⁻ is 2x mol/L.
Now, we can write the expression for Ksp:
Ksp = [Ca²⁺]\([OH^-]^2\)
Substitute the given Ksp value and the equilibrium concentrations:
2.9 × \(10^{-6}\) = \((x)(2x)^2\)
Simplify the equation:
2.9 × \(10^{-6}\) = \(4x^3\)
Solve for x (molar solubility):
x = \((2.9 * 10^{-6} / 4)^{(1/3)}\)
x ≈ 1.1 × \(10^{-2}\) mol/L
Finally, multiply the answer by 1000 and round to 1 decimal place:
1.1 × \(10^{-2}\) mol/L × 1000 = 11.0 mg/L

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Answer:

sound energy

Explanation:

Answer:

Chemical energy

Explanation:

Answer:

exposure to radiation i think

Explanation:

Answer: the total mass number of the reactants should equal the total mass number of the products

Explanation:

I took the quick check

The equation is correctly written if the total mass number of the reactants should equal the total mass number of the products.

This is defined as written representation of the process that occurs during a chemical reaction and consists of the reactant and product parts.

An equation correctly written if it's balanced and it involves the total mass number of the reactants being equal the total mass number of the products.

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answer is: O

o goes from 0 to -2, so it is the element that is reduced

hope this helps! ;)

Answer:

I'd say Mg.

Explanation:

The reducing agent is the agent that is oxidized (losses electrons).

The oxidizing agent is the agent that is reduced (gains electrons).

For the mentioned reaction:

2Mg + O2→ 2MgO.

Mg (oxid. no. = 0) is converted to MgO (oxid. no. of Mg = +2), which means that Mg losses 2 electrons and is oxidized.

So, the reducing agent is Mg.

Answer:

1

Explanation:

1 represents the element, Hydrogen

It has 1 shell/electron

Because hydrogen has only the one electron/shell, it can also lose that electron/shell to form a completely empty n = 1 shell.

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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Answer:

115N

Explanation:

your  friend and you push the car at the same time at the same direction so you add the force your friend is using and the force you’re using so: 60+55=115N

Answer:

????????

Explanation:

Answer:

pOH = 9.

Explanation:

The inverse relationship between the pH and pOH of any given solution can be written as:

pH = 14 - pOH

Or conversely:

pOH = 14 - pH

With the above information in mind we can use the given pH to calculate the pOH:

pOH = 14 - pH

pOH = 14 - 5

pOH = 9

Thus, black coffee has a pOH of 9.

Answer:

Li2SO4+H2CO3

Explanation:

put d equation this way

negative ions to positive ions

Answer:

six electrons need to be gained

Explanation:

Calcium has two valence electrons. To have a stable amount of valence electrons, or to attain noble gas electron configuration, an element needs to have eight valence electrons. Now, it's just a simple math problem. How many  more valence electrons does calcium need to get to eight? It needs six, since eight minus two is six.

Hopefully that's helpful! :)

Answer:

Single Replacement.

Explanation:

Answer:

C) Send radio waves through intervening media like radio and television.

Explanation:

I took the Final exam

Friends can send radio waves through intervening media like radio and television to communicate. Therefore, option (C) is correct.

Radiofrequency is the lowest region in the electromagnetic spectrum known as the medium of modern digital wireless communication systems. Radiofrequency has a range between 3 kHz and 300 GHz.

All transmission systems work in the radiofrequency spectrum range including analog radio, marine radio, aircraft navigation, amateur radio,  mobile networks, TV broadcasting, and satellite systems.

Radiofrequency has a lot of medical applications such as MRI technology, seismography, and oceanic studies. Our future digital communication systems may work on high-frequency bands of the Radiofrequency spectrum since they can support higher bandwidth.

The frequency of the x-rays and infrared rays is 10¹⁷ to 10²⁰ and 10¹³ to 10¹⁴ respectively. Therefore the frequency of radiowaves is the lowest among all the waves.

Therefore, two friends at different locations can communicate with each other by sending signals of radio waves through radio or television.

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