Atoms of two different elements must have different

Answer:

4.01 g

Explanation:

Answer:

When you wash your hands with soap, it dislodges the dirt, grease, oils, and disease-ridden fecal matter particles on your hands by creating these micelles. Surrounded by the soap, the oil molecules become suspended and distributed in the water rather than stubbornly clinging to your skin.

Explanation:

Answer:

density because it S.I unit is derived from fundamentals

Answer:

Some animals and plant are only known to us as fossils. hope this helps. and have a nice day:)

Answer:

hard water is ice

Explanation:

ice is formed as the water temperature decreases and then it freezes

Answer:

Lipids

Explanation: Lipids are, in fact, the only non-polymer organic molecules.

Answer:

Magnify glass

Answer:

Metals on top of the activity series can displace metals at the bottom and they are highly reactive as compared to metals at the bottom of the series.

Hence, the order is X>W>Y>Z.

Answer:

Lead phosphate

Explanation:

Pb3(po4)2 has the compounded name of lead(II) phosphate.

It is a white, crystalline solid that is insoluble in water. Lead(II) phosphate is used in some paints and plastics, and it is also used as a pigment.

The name of the compound is based on the oxidation state of the lead atom. Lead can have two oxidation states, +2 and +4. In Pb3(PO4)2, the lead atom has an oxidation state of +2, so the compound is named lead(II) phosphate.

The phosphate ion has an oxidation state of -3, so there are two phosphate ions in the compound to balance the +6 charge of the three lead atoms.

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Answer:

The matter has changed size, shape, or form.

Explanation:

A new substance that is formed is creation.

if the matter changed from one substance to another this is called a chemical reaction.

Surely not. It won't change the molecular level.

Hope that helps.

Answer:An atom

Explanation:

Because  molecules more spread out and have things that connnect them and are not bunched up togoether

And Atoms are all packed up like in the picture

Hope this helps!:D

The diagram shown is that of a molecule as it is made up of two different kinds of atoms.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.

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Explanation:

i think the answer might be D

Answer:

B.convection

Explanation:

Convection is the circular motion that happens when warmer air or liquid — which has faster-moving molecules, making it less dense — rises, while the cooler air or liquid drops down

Answer:

Depends since Chemical equation is not written clearly...

Explanation:

if if the comma represents an equal sign then I would assume that this would be a single replacement... however if this is all one equation I would assume it is a double replacement.

The type of chemical reaction shown in the question is a: A. Single replacement.

A chemical reaction can be defined as a chemical process involving the continuous transformation (rearrangement) of either the ionic, atomic or molecular structure of a chemical element, especially through the breakdown and formation of chemical bonds, in order to produce a new chemical compound.

In Chemistry, there are five (5) main types of chemical reaction and these include;

A single-replacement reaction is also referred to as a single-displacement reaction and it can be defined as a type of chemical reaction wherein a single (one) chemical element of the reacting chemical compound is replaced (substituted) by a similar chemical element.

Basically, a single-replacement reaction typically involves a single element ([tex]O_2[/tex]) replacing another element ([tex]Cl_6[/tex]) within a chemical compound ([tex]SeCl_6[/tex]).

[tex]SeCl_6+O_2[/tex]  ----> [tex]SeO_2 + 3Cl_2[/tex]

In conclusion, the above chemical reaction is a single-replacement reaction because oxygen gas replaces the chlorine molecules in selenium hexachloride.

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Answer:

La velocidad inicial es 55 [tex]\frac{m}{s}[/tex]y su aceleración es -10 [tex]\frac{m}{s^{2} }[/tex]

Explanation:

Un movimiento es rectilíneo uniformemente variado, cuando la trayectoria del móvil es una línea recta y su velocidad  varia la misma cantidad en cada unidad de tiempo . Dicho de otra manera, este movimiento se caracteriza por una trayectoria que es una línea recta y la velocidad cambia su módulo de manera uniforme: aumenta o disminuye en la misma cantidad por cada unidad de tiempo. Y la aceleración es constante y no nula (diferente de cero).

En este caso la posición del objeto esta dada por la expresión:

[tex]x=x0+v0*t+\frac{1}{2} *a*t^{2}[/tex]

donde x es la posición del cuerpo en un instante dado, x0 la posición en el instante inicial, v0 la velocidad inicial y a la aceleración.

En este caso, por un lado podes considerar:

Reemplazando obtenes:

[tex]90=v0*2+\frac{1}{2} *a*2^{2}[/tex]

[tex]90=v0*2+\frac{1}{2} *a*4[/tex]

[tex]90=v0*2+2*a[/tex]

Y por otro lado tenes:

Reemplazando obtenes:

[tex]120=v0*3+\frac{1}{2} *a*3^{2}[/tex]

[tex]120=v0*3+\frac{1}{2} *a*9[/tex]

[tex]120=v0*3+\frac{9}{2} *a[/tex]

Por lo que tenes el siguiente sistema de ecuaciones:

[tex]\left \{ {{2*v0+2*a=90} \atop {3*v0+\frac{9}{2} *a=120}} \right.[/tex]

Resolviendo por el método de sustitución, que consiste en aislar en una ecuación una de las dos incógnitas para sustituirla en la otra ecuación, obtenes:

Despejando v0 de la primera ecuación:

[tex]v0= \frac{90-2*a}{2}[/tex]

Reemplazando en la segunda ecuación:

[tex]120=\frac{90-2*a}{2} *3+\frac{9}{2} *a[/tex]

Resolviendo:

[tex]120=(90-2*a)*\frac{3}{2} +\frac{9}{2} *a[/tex]

[tex]120=135-3*a +\frac{9}{2} *a[/tex]

[tex]120-135=-3*a +\frac{9}{2} *a[/tex]

[tex]-15=\frac{3}{2} *a[/tex]

[tex]\frac{-15}{\frac{3}{2} } =a[/tex]

-10=a

Reemplazando el valor de a en la expresión despejada anteriormente obtenes:

[tex]v0= \frac{90-2*(-10)}{2}[/tex]

Resolviendo:

[tex]v0= \frac{90+20}{2}[/tex]

[tex]v0= \frac{110}{2}[/tex]

v0=55

La velocidad inicial es 55 [tex]\frac{m}{s}[/tex]y su aceleración es -10 [tex]\frac{m}{s^{2} }[/tex]

The type of clothe that you would wear when visiting the mesosphere are the winter clothes.

Mesosphere is used to describe the coldest part of the earth whose temperature is -85°C.

An individual that wants to visit such a cold area should wear clothes that would provide such with warmth such as the winter clothes.

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Answer:selenium

Explanation:

Answer: Nether

Explanation: Because if you have one pound of Calcium and one pound of selenium there both the same weight  

Explanation:

Ammonium Fluoride and Potassium Sulphate

Answer:

The third answer

Explanation:

Answer:

D

Explanation:

i mean it's just taking the words of the question and putting them into an equation

[tex]\huge\boxed{Option C}[/tex]

As per Question,

It is saying that Benzene(organic compound) reacts with nitric acid. So,

Benzene and Nitric Acid are Reactants,

Nitrobenzene is the Product.

_________________________________________________________

General way of showing the reaction is,

In the following Question,

Benzene is Reactant no. 1,

Nitric Acid is Reactant no.2,

Nitrobenzene is Product no 1,

Water is a By Product.

Answer:

(1) atomic numbers

Explanation:

The observed regularities in the properties of the elements on the periodic table are periodic functions of their atomic numbers.

The observed regularities in the properties of  the elements are periodic functions of their atomic numbers.

Modern periodic law states that "Properties of elements are a periodic function of their atomic number not by their atomic mass". Modern periodic law was proposed by Henry Moseley in 1913. Physical and chemical properties of elements depend on the number of electrons and their arrangement.

Thus properties of elements are periodic function of their atomic numbers and not atomic masses. If the properties of an element depend on number of proton and neutron then the properties are periodic function of their atomic mass so we can conclude that the observed regularities in the properties of  the elements are periodic functions of their  atomic numbers.

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75 for all

Explanation:

Answer:

Explanation: Li= Lithium, Na= Sodium, K= Pottasium, Rb= Rubdium Cs= Cesiuna, Fr= Fransium

6. Energy levels increases as if you move down a group during the number of electrons increases again.

7. A charge with higher and effective nuclear charge makes greater attractions to the electrons, pulling the electrons cloud closer to the nucleus makes it in a smaller atomic radius.

8. Ge= Germanium, He= Helium, O=Oxygen, Barium

Explanation:

Because the panthers live in the southeastern region of the United states they have increased in population in that region. They have been able to gain more food and have adapted more to there environments. Which allows to increase and reproduce more. That is why the Panthers in the southeastern United states have increased In population.     I hope this works for you and that it helps. I don't mind helping someone who has a question! From, me.

A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. More panthers were born than died explains the increase in the size of the panther population.

The jaguar, also known as the panther, tigre, or onza, is the world's largest and most powerful cat. Human activities endanger this cat, as they do the Florida panther (Puma concolor).

Because the anteater population will have fewer energy storage molecules available due to the smaller ant population, the anteater population will reproduce less.

Panthers can be found in the southeastern United States. The region's panther population has grown over the last 50 years. Because no animal eats panthers, the panther population is always growing.

Thus, More panthers were born than died explains the increase in the size of the panther population.

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Answer:

26.35 mmHg

Explanation:

Given data:

Initial pressure = 65.0 mmHg

Initial temperature = 740 K

Final temperature = 300 K

Final pressure = ?

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

65 mmHg / 740 K = P₂/300 K

P₂ = 65 mmHg× 300 K  / 740 K

P₂ = 19500 mmHg. K /740 K

P₂ = 26.35 mmHg

Answer:

c  solvents dissolve chemicals with the same polarity ( ex. both are polar)

Explanation:

Like dissolves like is one of the central rule that guides the solubility of one substance in another.

Explanation:

Many of the properties of organic molecules can be predicted based on the strength of their cohesive molecule-molecule interactions (i.e. how much the molecules want to stick together).  The boiling point (BP) and melting point (MP) of an organic molecule is related to: 1) the molecular weight of the molecule and 2) the "stickiness" of individual molecules for their neighbors.  

   For example, molecules in a liquid are held together by attractive interactions between molecules.  These interactions must be broken (by adding heat) in order to transition into the gas.  The stronger the cohesive interactions, the more heat that is necessary for the liquid-to-gas phase transition.  These same attractive molecule-molecule interactions have to be broken for a solid to liquid phase change.

Examples: (Rank the following molecules in terms of MP and BP.)

Introduction to intermolecular forces:

All of the attractive intermolecular forces are based on the electrostatic attraction of positive charges on one molecule with negative changes.  The stronger the charges, the stronger the attraction between molecules.

How to:

In general, comparisons can only be made between molecules with similar formulas or molecular weights.*  First, identify the functional groups in the molecules being compared.  Each functional group can form different types of intermolecular interactions (see the chart above).  Interactions higher up on the chart form stronger cohesive interactions and will have higher boiling points and melting points.

* Note that larger molecules usually have higher boiling points and melting points.  This is not because of their higher molecular weights but because they usually have greater surface areas with which to form more intermolecular interactions.  This is also why linear molecules tend to have higher MPs and BPs than branched (or more spherically shaped) molecules.  Linear molecules will have more surface area than a more spherically shaped molecule.

All three molecules have approximately the same molecular formula and molecular weights.  Only molecule A contains a strongly polarized or ionic functional group: an aldehyde.  The C=O group in aldehydes generate a strong molecular dipole (partial + and - charges).  Thus, it can form weak attractive dipole-dipole interactions, and A will have the highest boiling point and highest melting point in this series of compounds.

Molecules B and C are alkanes.  They can only form the weakest attractive dispersion interactions between their molecular surfaces.  Due to its long-thin shape, B will have a greater surface area and can form more dispersion interactions than the rounder C.  Therefore, B will have a higher boiling point and melting point than C.

Molecule A is ionic (it has charges).  Therefore, it can form the strongest ion-ion interactions and will have the highest boiling point and melting point.

Molecule B is a carboxylic acid with an acidic proton and basic lone pairs.  Therefore, it can form medium strength hydrogen bonding interactions, and it will have the next highest boiling point and melting point.

Molecule C is a carboxylic ester, which is a polar functional group.  However, it does not have an acidic proton.  Therefore, esters cannot form hydrogen bonds with themselves.  Instead, they can only form weak dipole-dipole interactions and will have the lowest boiling point and melting point in this series of compounds.

Answer:

Explanation:

By thinking about non covalent intermolecular interactions, we can also predict relative melting points. All of the same principles apply: stronger intermolecular interactions result in a higher melting point.

Explanation:

Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2). The reaction continues even when the solution becomes basic. The resulting solution is basic because of the dissolved hydroxide. 

Explanation:

Sodium metal reacts rapidly with water to form a colourless basic solution of sodium hydroxide (NaOH) and hydrogen gas (H2).