Which characteristic describes bases?
taste sour
feel slippery
react with metals
are used to remove rust

The correct answer is: Atoms are the building blocks that make up elements. At the center of each atom is a nucleus composed of small particles called protons and neutrons. Nuclei is the plural of nucleus; option C.

The atomic number of an element is the number of protons present in the nucleus of the atom of the element.

The nucleus is the center of the atom and is the heaviest part of the atom.

Another sub-atomic particle fund in the nucleus is the neutron.

Elements are named according to the number of protons in the nuclei.. This is because the number of protons in the nucleus of any given atom whereas the neutron number may vary, Also, electrons are easily removed from atoms of elements.

In conclusion, the number of protos in atom is used to name the atom.

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Although, a part of your question is missing, you might be referring to this full question "How does crushing a candy to smaller pieces affect its digestion?"

Crushing the candy into smaller pieces increases the surface area of the solvent which will result in the reduction of digestion or dissolution.

Digestion is the process in which food taken is broken down into smaller components that can be absorbed into the bloodstream. Digestion helps in converting food into molecules, like glucose so that the body can utilize that energy for its growth and development.

While Crushing the candy into smaller pieces, we are increasing the surface area of the solvent which will result in the reduction of digestion or dissolution of the candy. Thus, the larger the size of the pieces, the slower will be the process of digestion. This physical process in which large pieces of food are cut and crushed into smaller pieces is known as mechanical digestion.

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Answer:

Explanation:

Here, we want to get the mass of carbon (iv) oxide produced

We start by writing the equation of reaction as follows:

Now, we need to get the mass of propane that reacted

We can get that by multiplying the density of propane by its given volume

Mathematically, we have that as:

From here, we get the actual number of moles of propane that reacted

We can get that by dividing the mass by the molar mass of propane

The molar mass of propane is 44 g/mol

The number of moles is thus:

From the balanced equation:

1 mole of propane gave 3 moles of carbon (iv) oxide

104/44 mol will give x moles

We have the value of x as:

To get the mass of carbon (iv) oxide produced, we multiply the number of moles above by the molar mass of carbon (iv) oxide

The molar mass of carbon (iv) oxide is 44 g/mol

Thus, we have the mass as:

Coenzyme q carries electrons from complex I to complex III  and complex II to complex III  in the electron-transport chain.

Coenzyme q  (CoQ), also known as ubiquinone, is the electron carrier in the electron transport system (ETS) present on the inner membrane of mitochondria.

Ubiquinone is a ubiquitous quinone, which accepts electrons from complex II ( succinate dehydrogenase) and  reduces to ubiquinol ( reduced form)

The purpose of the ETS is to generate an H+ ion concentration, by carrying electrons obtained from NADH AND \(FADH_{2}\)   produced by the Krebs cycle and glycolysis in the mitochondrial matrix. This  H+ ion potential will be used by ATP synthase to generate ATP.

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The inner mitochondrial membrane contains CoQ, a key part of the mitochondrial electron transport chain (ETC), which moves electrons from complexes I and II to complex III to provide energy for proton translocation to the intermembrane gap.

An organelle called a mitochondrion can be found in the cells of the majority of Eukaryotes, including mammals, plants, and fungi. Adenosine triphosphate, which is produced by aerobic respiration in mitochondria with their double membrane structure, is used as a source of chemical energy throughout the entire cell.

Coenzyme Q10 takes electrons from reducing equivalents produced during the metabolism of fatty acids and glucose and then transports them to electron acceptors as part of the mitochondrial electron transport chain.

Ubiquinone, also known as coenzyme Q, is a lipophilic molecule that is found in all tissues and cells and is mostly found in the inner mitochondrial membrane. It is generally known that Coenzyme Q is an essential part of the oxidative phosphorylation process in mitochondria.

Thus, The inner mitochondrial membrane contains CoQ, a key part of the mitochondrial electron transport chain (ETC).

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Answer:

B, 2NO + O2 --> 2NO2

Explanation:

The exponents in the rate law for an elementary step are equal to the stoichiometric coefficients of the particles in the equation for the elementary step. Therefore, the elementary reaction must be between two NO molecules and one O2 molecule.

The elementary reaction of the three-body molecular collision is 2NO + O2 -----> 2NO2

The rate of reaction refers to how fast or slow a reaction occurs. The rate equation for an elementary reaction involves the concentration of the species raised to the power of their respective molar coefficients.

We are told that the rate law of the reaction is given as; Rate = k[NO]^2 [O2]. This implies that the single elementary step that is a three-body molecular collision, is represented by the equation; 2NO + O2 -----> 2NO2.

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Answer:

In a lab, a student mixes 25.0 ml of 0.115 M aluminum sulfate with 34.0 ml of 0.0975 M Lead (III) nitrate. Calculate the grams of the precipitate that is formed.

Explanation:

According to percent solution, 100.5 mg  iron(II) sulphate needs to be weighed out to make a 50.0 ml solution.

Percent solution is defined as a convenient way to record concentration of solution.It is a expression which relates solute to solvent as,mass of solute/mass of solution ×100.There are two types of percentage solutions percent weight by volume and percent volume by volume .Advantages of using percent solutions is that molecular weight of compound is not required.

It is calculated as, 20.1×50=100.5 g.

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Answer:

\(density = \frac{mass}{volume} \\ \: mass = density \times volume \\ mass = 0.680 \frac{g}{ {cm}^{3} } \times 24.9 {cm}^{3} \\ = 16.728g\)

Answer:

1

Explanation:

Because its on top the higher it is, the more potential energy it has

Weakness and nausea are the responses of vomiting and fever. Because people tend to feel weak and uneasy after vomiting.

A response is a response to a stimuli, such as a question, an experience, or another kind of stimulus. You are experiencing an emotional reaction to the drama being played out on screen if you cry during sad movies. A response can take many different forms, such as an explanation for a question, an emotional response, or a rejoinder.

The act of vomiting is the forceful ejection through the mouth of the contents of the upper digestive tract and stomach. It can also be referred to as throwing up or feeling ill.

Vomiting is a reflex that aids the body in getting rid of potentially dangerous chemicals. The majority of people will eventually vomit.

This information relates to vomiting in adults and kids older than 12. For details pertaining to children between the ages of 0 and 12 years, see vomiting in children.

Therefore, Weakness and nausea are the responses of vomiting and fever.

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Explanation:

14 moles of potassium oxide, K2O, reacts, how many grams of potassium nitride, K3N, will be made? Show work

To determine the tomato's velocity when it hits the ground, we need more information. Specifically, we need the height from which the tomato was dropped and the tomato mass.

Without these details, it is impossible to calculate velocity accurately. The velocity of an object when it hits the ground depends on factors such as the height of the fall, the mass of the object, and any forces acting on it during the fall (such as air resistance).

If you can provide the necessary information, I can help you calculate the velocity of the tomato when it hits the ground.

Ammonium sulfate fertilizer is more expensive than sodium nitrate fertilizer in most cases.

As a fertilizer, sodium nitrate is more cost-effective than fertilizer that contains ammonium sulfate due to its higher nitrogen content. Because sodium nitrate contains a higher percentage of nitrogen, it meets the plant's need for fertilizer while requiring less fertilizer to be applied.

You can determine the proportion of nitrogen in ammonium sulfate by dividing the molar masses of the two nitrogen atoms by the molar masses of the compound and then multiplying the result by 100. This indicates that every 100 grams of ammonium sulfate contains 21.2 grams of nitrogen.

To determine the generator and power station's percentage efficiency, divide the 3,412 Btu equivalent of a kWh of energy by the heat rate. For instance, at a heat output of 10,500 Btu, the efficiency is 33%.

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The considerations which are applicable in a suitable recrystallization solvent are: should have a boiling point that is ~ 30-50 °C, Should be unreactive, Offers minimal solubility and solubility-temperature relationship. Option A, C, D and E will be correct.

This statement is true. Because the solvent should have a boiling point that is around 30-50 °C higher than the melting point of the compound to be recrystallized in order to achieve efficient dissolution and crystal formation.

This statement is false. Because a good recrystallization solvent should dissolve the compound of interest well at high temperatures but not at all or only slightly at lower temperatures. Ideally, the impurities should dissolve well at all temperatures, so that they can be separated from the compound of interest during the filtration step.

This statement is true. Because the solvent should not react with the compound of interest, which would affect the purity of the final product.

This statement is true. Because the solvent should have minimal solubility for the compound to be purified at room temperature and lower temperatures, but should dissolve the compound well at higher temperatures in order to achieve efficient recrystallization.

This statement is true. Because the solubility-temperature relationship for the solvent and the compound should have a low slope in order to achieve efficient recrystallization.

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--The given question is incorrect, the correct question is

"Which of the following considerations are applicable when choosing a suitable recrystallization solvent? (TRUE / FALSE) A) Should have a boiling point that is ~ 30-50 °C above room temperature. B) Does not dissolve impurities at all temperatures or completely dissolves impurities at all temperatures. C) Should be unreactive toward the compound of interest. D) Offers minimal solubility of the compound to be purified at room and lower temperatures. E) Its solubility-temperature relationship to the compound should give a curve with a low slope."--

Answer:

Ethyl ethanoate

Explanation:

To name the compound given above, we must:

1. Determine the functional group of the compound.

2. Determine the longest continuous carbon chain before the functional group and the longest continuous carbon chain after the functional.

3. Name the compound by naming the compound after the functional group followed by the compound before the functional group ending its name with

–oate.

Now, we shall determine the name of the compound as follow:

1. The compound is an ester with the functional group R'COOR.

Note: R' and R are alkyl groups which may be the same or different.

2. The longest continuous carbon chain before the functional group is 2 i.e ethane and the longest continuous carbon chain after the functional group is 2 i.e ethyl

3. The name of the compound after the functional group => ethyl.

The name of the compound before the functional group => ethane but the pressence of the two oxygen atoms makes it ethanoate.

Therefore, the name of the compound is Ethyl ethanoate

Answer:

Read Below

Explanation:

Electrolysis is not possible with solid lead (II) bromide. This is because the ions are held in a three-dimensional lattice, unable to move freely to the electrodes. Melting enables the ions to become mobile and to travel to the respective electrodes.

The bulb won't glow when the electrodes are embedded in solid lead bromide.  The bulb will glow when the material surrounding the electrodes is molten lead bromide. When an ionic compound is in the molten (liquid) form the positive and negative ions are free to move around.

Hopes this Helps :D

Brainiest Please

Answer:

New environments for puppies may make them excited, fearful, aggressive, or confused.

Explanation:

"When your dog first experiences a new location or environment, there's no way of knowing how they'll react. New sights, sounds, and smells could make them fearful, aggressive, or over-excited, but with the proper training and introduction, most dogs will quickly adapt and start taking every new location in stride." - Excerpt from *Puppy training textbook*

New environments are also a good thing in puppy growth, to teach them how to learn and adapt to new surroundings.

Hope this helps :)

Answer:

Ether group.

Explanation:

Ethers are the compounds that connect two aryl or alkyl groups by an oxygen atom and represented by R–O–R′ where R either aryl or alkyl groups. Ether can be identified by the presence of alKyl groups on either side of the oxygen atom commonly. Diethyl ether, methyl ethyl ether are some of the examples of alkyl ether

Thus, the correct answer is - Ether group.

If one of the elements is a metal and the other is a nonmetal, they will most likely form an ionic bond. Monatomic cations and anions make up these kinds of ionic compounds.

The reactivity of an atom—or propensity to establish chemical interactions with other atoms—depends on the amount of electrons in its outermost shell.

The number of protons in a particular atom, which is an element's smallest building block, is how an element is defined. A compound, on the other hand, is made up of different atoms, and the smallest component of a compound is a molecule.

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A redox reaction is a reaction in oxidation or the loss of electrons occurs simultaneously with reduction involving a gain of electrons.

The balanced equation of the redox reaction by the oxidation number method is as follows: Zn + 2HNO₃ ----> Zn(NO₃)₂ + 2NO₂ + H₂O

The complete equation of the redox reaction is given below as follows:

To balance the chemical reaction by oxidation number, we need to ensure that the total change in oxidation numbers for each element is zero on both sides of the equation.

Let's assign the oxidation numbers to the elements:

In Zn(NO₃)₂, the oxidation number of Zn is +2, and the oxidation number of each NO₃ group is -1.

In HNO₃, the oxidation number of H is +1, the oxidation number of N is +5, and the oxidation number of each O in NO₃ is -2.

On the product side, the oxidation number of Zn is +2, and the oxidation number of each NO₃ group is -1. The oxidation number of N in NO₂ is +4, and the oxidation number of each O is -2. The oxidation number of H in H₂O is +1, and the oxidation number of O is -2.

Now, let's balance the reaction by considering the changes in oxidation numbers:

Zn: 0 → +2

H: +1 → 0

N: +5 → +4

O: -2 → -2

To balance the oxidation numbers, we need two NO₂ molecules on the product side. The balanced equation is:

Zn + 2HNO₃ ----> Zn(NO₃)₂ + 2NO₂ + H₂O

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The limiting reactant in the reaction is NaOH. one mole or 40 g of NaOH gives 58.5 g of NaCl. Thus, 4.16 g have to give 6.08 g but the actual yield is 5.79 g. Thus the percent yield of the reaction is 95%.

Percent yield of a reaction is the ratio of actual yield to the theoretical  yield multiplied by 100.

The molar mass of NaOH is 40 g/mol. Thus number of moles of NaOH is 4.16 /40 = 0.10 moles. Similarly the molar mass of HCl is 36.5 g/mol and number of moles in 5.81 g is 5.81/ 36.5 = 0.15 moles.

One mole of HCl needs 1 mole of NaOH, thus 0.15 moles need 0.15 moles NaOH but we have 0.1 only. Thus, NaOH is the limiting reactant.

40 g of NaOH gives 58.5 g of NaCl (1 mole). Thus the theoretical yield for 4.16 g of NaOH  is :

=  ( 4.16 × 58.5 )/40

= 6.04 g.

The actual yield is 5.79 g. Thus percent yield =(5.79/6.04) × 100 = 95%.

Hence, the percent yield of the reaction is 95%.

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Answer:

Not really, the chances you will get hurt are insignificant

Explanation:

Answer:

12 moles Cl⁻

Explanation:

To find the moles Cl⁻, you need to (1) calculate the moles of magnesium chloride (MgCl₂) using the molarity equation and then (2) convert moles MgCl₂ to moles Cl⁻ (via the mole-to-mole ratio from formula subscripts). It is important to arrange the conversions in a way that allows for the cancellation of units.

Molarity (M) = moles / volume (L)

2 M = moles / 3 L

6 = moles MgCl₂

1 MgCl₂ = 1 Mg²⁺ and 2 Cl⁻

6 moles MgCl₂            2 moles Cl⁻
------------------------  x  -----------------------  =  12 moles Cl⁻
                                   1 mole MgCl₂

The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. Therefore, 0.050moles of sodium hypobromite (NaBrO) should be added to 1.00 L of 0.050 M hypobromous acid (HBrO) to form a buffer solution of pH 9.15

Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.

Mathematically,

Molarity= number of moles of solute/volume of solution in litre

Where,

moles= ?

volume= 1.00 L

Molarity=0.050 M

Substituting values in equation, we get

0.050=number of moles of solute/1.00

number of moles of solute=0.050moles

Therefore, 0.050moles  of sodium hypobromite (NaBrO) should be added to 1.00 L of 0.050 M hypobromous acid (HBrO) to form a buffer solution of pH 9.15

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Answer:

1.2 moles of Helium

Explanation:

According to Avogadro's Law :

Here :

Solving :

Answer:

\(\huge\boxed{\sf M = 0.06\ M}\)

Explanation:

No. of moles = n = 0.03 mol

Volume = v = 500 ml = 0.5 L

Molarity = M = ?

M = n / v

Put the given data in the above formula.

M = 0.03 / 0.5

\(\rule[225]{225}{2}\)

Answer:

c

Explanation:

Answer:

* \(x_{CH_3OH}=0.0425\)

* \(\%m/m_{CH_3OH}=7.31\%\)

* \(m=2.46m\)

Explanation:

Hello,

In this case, for the mole fraction of methanol we use the formula:

\(x_{CH_3OH}=\frac{n_{CH_3OH}}{n_{CH_3OH}+n_{water}}\)

Thus, we compute the moles of both water (molar mass 18 g/mol) and methanol (molar mass 32 g/mol):

\(n_{CH_3OH}}=14.6g*\frac{1mol}{32g}=0.456molCH_3OH \\\\n_{water}}=185g*\frac{1mol}{18g}=10.3molH_2O\)

Hence, mole fraction is:

\(x_{CH_3OH}=\frac{0.456mol}{0.456mol+10.3mol}\\\\x_{CH_3OH}=0.0425\)

Next, mass percent is:

\(\%m/m_{CH_3OH}=\frac{m_{CH_3OH}}{m_{CH_3OH}+m_{water}}*100\%\\\\\%m/m_{CH_3OH}=\frac{14.6g}{14.6g+185g}*100\%\\\\\%m/m_{CH_3OH}=7.31\%\)

And the molality, considering the mass of water in kg (0.185 kg):

\(m=\frac{n_{CH_3OH}}{m_{water}} =\frac{0.456mol}{0.185kg}\\ \\m=2.46m\)

Regards.

The specific heat capacity of the zinc metal, given that 2.40×10¹ g of zinc metal at 2.10×10¹ °C is added to the water is 0.27 J/gºC

First, we shall obtain the heat absorbed by the water when the zinc metal was added. This is shown below:

Q = MCΔT

= 5.60×10¹ × 4.184 × -2.1

= -492.0384 J

Now, we shall determine the specific heat capacity of the zinc metal. Details below:

Q = MCΔT

492.0384 = 2.40×10¹ × C × 76

492.0384 = 1824 × C

Divide both sides by 1824

C = 492.0384 / 1824

= 0.27 J/gºC

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Answer:

O

Explanation:

The atoms lose energy during a change of state, but can still slide past each other; gas to a liquid.

Answer:

i think the answer is C: O

Explanation:

correct me if im wrong