A substance freezez at -58°C. Therefore, the substance melts at

According to Avogadro, one mole of a material consists :

6.022x10∧23 atoms. Avogadro's number is this. Use dimensional analysis to determine the number of atoms present in two moles of sodium.

Na x 2.0 moles

6.022⋅10

23g1

mol=1.20

10.24 Na atoms.

The mass of 6.022 10 23 atoms, molecules, or formula units make up one mole of a material, which is known as the molar mass. This value is given in grammes per mole.

The SI unit for calculating a material's amount is the mole. It is symbolised by the letter mol. The volume of material that includes the same number of distinct things is another name for it. The molar mass of a substance is its mass expressed in grammes per mole.

learn more about molar mass refer

https://brainly.com/question/21334167

#SPJ9

An elastic collision is one in which the system does not experience a net loss of kinetic energy as a result of the collision.

To learn more about : elastic collision  

Ref : https://brainly.com/question/7694106

#SPJ9

In the given weigh on a balance and recorded masses 2.25g is the accuracy and precision of the balance

A balance used to weigh quantities to a very precise number, usually up to one milligram and accuracy is the balance related to the measurement uncertainty of each reading.

Here given data is three students are given = 200g weight and record the following masses = 150g, 151g, 150g

We have to calculate accuracy and precision of the balance = ?

So accuracy and precision of the balance = sum of data/no of measurement

Here sum of data means = 150g, 151g, 150g and no of measurement = 200g

accuracy and precision of the balance =  150g+151g+150g/200

accuracy and precision of the balance = 2.25g

Know more about accuracy and precision

https://brainly.com/question/1695768

#SPJ1

Answer:

Probably because there is more helium to burn. After billions of years there's only gonna be helium so no more of that firey energy.

I think....

Elements in the same group share many chemical and physical properties, such as the follows:

Elements are the simplest chemical substances that cannot be decomposed in a chemical reaction or by any chemical means and made up of atoms all having the same number of protons.

Elements are arranged in order of their atomic number on the periodic table. The periodic table is arranged in groups (vertical columns) and periods (horizontal rows).

Elements in the same group possess the same chemical properties, which include;

Learn more about elements at: https://brainly.com/question/14347616

#SPJ1

The mass of gold is 193g.

Density is defined as the mass of a material substance per unit volume. The equation for density is d = M/V, where d stands for density, M for mass, and V for volume. It is generally measured in grams per cubic centimeter. Density provides an easy way to calculate a body's mass from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d).

Now, in the given question,

Density of gold = 19.3 g/cm³

Volume of gold = 10 cm³

Since,  Density = Mass/Volume

Therefore, Mass of gold = Density of gold × Volume of gold

                                        = 19.3g/cm³ × 10 cm³

                                       = 193g.

Hence, the mass of gold is 193g.

Read more about Density:

https://brainly.com/question/3324293

#SPJ1

A problem that is usually posed in the form of a method.

What exactly is the scientific method? What are the stages of a scientific method?

A scientific method is a set of steps designed to assist you in solving problems and answering questions. The scientific method is comprised of the following stages:

In order to apply the rule or law generally: The term "principle" or "law" refers to a thoroughly verified fact pertaining to a scientific finding or phenomenon. Its prediction has proven to be trustworthy.

To know more about the scientific method, visit the given link:

https://brainly.com/question/24215195

#SPJ4

The statement that explains what must be done the observe the chemical property of a substance is as follows: Change it into a different substance (option A)

The chemical property of a substance is any of a material's properties that only becomes evident during a chemical reaction.

Chemical reaction is a reaction that typically involves the breaking or making of interatomic bonds, in which one or more substances are changed into others.

This suggests that chemical properties cannot be observed via change of state or phase but can only be observed when the substance changes into a different substance i.e. undergo a chemical reaction.

Learn more about chemical properties at: https://brainly.com/question/1935242

#SPJ1

Answer:

What represents the average kinetic energy of the molecules of any gas? Choose the correct answer.

=Temperature

I HOPE IT HELP YOU

Answer:A student drops a bottle of shampoo because his hands were slippery from the shampoo. Other than its slippery feel, what other tests would confirm which type of compound was in the shampoo? Choose the two statements that apply.

A. It tastes bitter.

B. It reacts with metals.

C. It turns red litmus blue.

D. It turns blue litmus red

Explanation: ans B. It reacts with metals. mark me as  brainliest

The average atomic mass in amu of a large sample of the isotope Palomarium- 46:46.00159 amu

The weighted average mass of the atoms in a naturally occurring sample of an element is the average atomic mass, also known as atomic weight.

Unified atomic mass units are typically used to express average masses (u).

Let

46Palomarium = 46.00159 = x%

48Palomarium = 47.98621 = 1-x%

⇒ 46.9939 = (46.00159)x + (47.98621) (1-x)

⇒ 46.9939 = -1.98462x + 47.98621

⇒-0.99231 = -1.98462x

⇒ x = 0.50 = 5.%

and 1-x = 1-0.50 = 50%

avg atomic mass = 46.00159 (0.5) + (47.98621) (0.5)

= 46.9939 amu

To know more about atomic masses, visit:

https://brainly.com/question/17067547

#SPJ4

The electron is a subatomic particle with a negative one elementary charge electric charge. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.

For each of the ions listed, identify the total number of electrons for each

You must keep in mind that when an ion bears a positive charge, the number of electrons is lower than the number of protons in order to compute the number of electrons in the positive-charged ion. Therefore, you must subtract the magnitude of charge (which is frequently expressed as a superscript on the right side of the symbol) from the atomic number or proton number in order to obtain the number of electrons.

To know more about Electrons, click on the link below:

https://brainly.com/question/28499666

#SPJ9

The correct answer is MgH2.

In most cases, a metal reacting with a non-metal results in the formation of ionic compounds. As is common knowledge, metals always contain extra electrons on their outermost shells while non-metals never do. Metals thus transfer their electrons to non-metals, allowing both to reach the required octave.

Mg, a metal, contains two electrons in its outermost valence shell (E.C-2, 8, 2), while hydrogen, a gas, only has one electron in its outermost shell in the compound MgH2 (E.C- 1). As a result, Mg receives two electrons, achieving its stable state and satisfying the octet rule. On the other side, hydrogen gets one electron per atom, achieving the electrical structure of helium and becoming stable.

MgH2 is an ionic compound as a result.

To learn more about magnesium hydride refer the link:

https://brainly.com/question/24101450

#SPJ9

The scientific problem that the student is trying to investigate is the boiling point affected by the strength of particle attraction. So the correct option is A.

A liquid partially vaporises into the airspace above it at any temperature up until the vapour the liquid's pressure at that temperature, which is a characteristic value. The vapour pressure rises as the temperature rises, and when the liquid reaches the boiling point, vapour bubbles develop inside the water and come to the surface.

A liquid's boiling point changes depending on the pressure being applied; the normal boiling temperature is the point at which the vapour pressure is comparable to the average atmospheric pressure at sea level (760 mm [29.92 inches] of mercury). Water boils at sea level at 100° C (212° F). Lower boiling point temperatures are seen at greater elevations.

Therefore, the correct option is A.

Read more about boiling point, here

https://brainly.com/question/28203474

#SPJ1

Answer:

The answer in standard form is 5200

Explanation:

It's extremely easy once you learn how to do it! Let me teach you! To change a number from scientific notation to standard form, move the decimal point to the left if you have a negative exponent, and to the right if you have a positive exponent. For example 5.2 × 10^-3 would be 0.0052 because the exponent is negative, so you over the decimal to the right however many times it says (whatever number the exponent is is how many places you move the decimal). So, the decimal is moved to the left 3 times, stopping it at 0.0052. And positive exponents are done the same way: only you move to the right and you will not get a decimal answer (its an actual number). You should move the point as many times as the exponent indicates. You answer should ever include the power of ten, because that only makes another problem to convert to standard form.

Hope that helps! Have an amazing rest of your day! Please award me Brainliest!! :)

Water and alcohol has no colour. Water has no smell but alcohol smell like musty. Salt more dissolve in water as compared to alcohol.

The water is colourless as well as odorless means it has no smell. Water can dissolve salt because the positive ion of water molecules attracts the negative chloride ions and the negative ion of water molecules attracts the positive sodium ions while on the other hand, the alcohol is colourless means it has no colour. The smell of alcohol is musty and sharp. Salt dissolves less in alcohol, because alcohol molecules have less ions as compared to water. Alcohol is non-polar like oil and salt is polar so it does not dissolve or very little in alcohol.

So we can conclude that Water and alcohol has no colour. Water has no smell but alcohol smell like musty. Salt more dissolve in water as compared to alcohol.

Learn more about alcohol here: https://brainly.com/question/947751

#SPJ1

Acids i think... because I know for sure H3PO4 is a acid and so is Hbr...

Answer:

B. Acids

Explanation:

All of them are acids because H3PO4 is phosphoric acid, HBr is hydrobromic acid, H2SO4 is sulfuric acid, and HNO3 is nitric acid.

Pls. give me a lot of points I took a lot of time to help you. :)

The order of decreasing rate of effusion of gases is as follows :Hydrogen, Neon, Oxygen, and Argon.

Rate of Effusion :

The rate of effusion is inversely proportional to the square root of the molecular mass and the rate of effusion of a gas is directly proportional to the speed of the movement of gas.

It can be mathematically expressed as

         rate of effusion ∝   1  

                                       √M  

This means that if two gases are at same pressure and temperature, the ratio of their rate of effusion is inversely proportional to ratio of square roots of mass. So, lighter gases will diffuse more quickly. The molecular masses of the gases are,

molecular mass of H₂= 2 g

molecular mass of O₂ =32 g

molecular mass of Ar = 39.94 g

molecular mass of Ne = 20.17 g

If we take ratios of these, for example between hydrogen and oxygen -

rate of effusion of hydrogen = √32 = 4

rate of diffusion of oxygen        √2       1

Hydrogen effuses four times more rapidly than oxygen.

The rate of effusion is highest in Hydrogen and lowest in Argon.

The order of decreasing rate of effusion of gases is as follows:

Hydrogen, Neon, Oxygen, and Argon.

To learn more about rate of effusion,

brainly.com/question/28601637

#SPJ4

Answer:

Option 3

Explanation:

Because electrons have the same charge, they repel. So, if possible, the electrons should be in different orbitals.

Correct option is 3 for the arrangement for a 2p sublevel with only 3 electrons.

Atomic orbitals unite to generate an equal number of hybrid orbitals during the formation of certain compounds, a process known as orbital hybridization. In terms of both atomic theory and quantum physics, an atomic orbital is a function that explains the location and wave-like activity of an electron in an atom.

The probability of finding an electron in any atom in any region around the nucleus may be calculated using this function. A mathematical function known as a molecular orbital can be used to describe the location and wave-like activity of an electron inside a molecule.

This function may be used to determine chemical and physical attributes such as the probability of finding an electron in a specific region. In addition to being entirely destroyed, orbital bombardment also does damage to any army.

To learn more about orbitals from the given link:

brainly.com/question/18914648

#SPJ9

One isotope of a metallic element has the mass number 64 and 34 neutrons in the nucleus. the cation derived from the isotope has 28 electrons. So the atomic number will be 30.

Mass number of isotope = 64

Number of neutrons = 34

So number of protons = 64 - 34 = 30

Hence atomic number of metal = 30

Thus metal is = zinc

Now as it is forming cation with 28 electrons it means it has lost two electrons so it must have a dipositive charge.

The symbol of metal ion will be Zn^+2

The number of protons in an atom's nucleus or the number of electrons in an electrically neutral atom is the atomic number of that atom. An atom of sodium, for instance, has 11 protons and 11 electrons. Therefore, the atomic number of the Na atom is equal to the sum of its protons and electrons, or 11.

Learn more about atomic number:

https://brainly.com/question/28488147

#SPJ4

Question: GoodMorning: ) ✨ Explain why there are different colors of visible light ?

Answer: WAVELENGTHS OF VISIBLE LIGHT

As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.Light is made up of different wavelengths, or colors, and white light is a combination of all of them. When a ray of white sunlight hits a patch of beach ball, the paint absorbs most of the wavelengths. It reflects the rest. For example, if the patch is blue, it reflects the blue wavelengths and absorbs all the others.

Explanation: Here are the 7 from shortest to longest wavelength.

Violet - shortest wavelength, around 400-420 nanometers with highest frequency. ...

Indigo - 420 - 440 nm.

Blue - 440 - 490 nm.

Green - 490 - 570 nm.

Yellow - 570 - 585 nm.

Orange - 585 - 620 nm.

Red - longest wavelength, at around 620 - 780 nanometers with lowest frequency. Electromagnetic waves have many different wavelengths and frequencies that span a range known as the electromagnetic spectrum (Fig. 1.1). Light is a narrow range of electromagnetic waves that the eye can detect. Light of different wavelengths produces different perceptions of color.

Have An Awesome Day/Night<3

The bond that exists between two oxygen atoms to make the O2 molecule is described as two covalent bonds and two lone pairs of electrons are present on each individual oxygen atom.

A double bond in chemistry is a covalent bond between two atoms that involves four bonding electrons, rather than two as in a single bond.

In the oxygen molecule, O2, the oxygen atoms that make up the molecule are bonded together by sharing two pairs of electrons. Each oxygen atom has 6 valence electrons, if they share two of their valence electrons with each other, they each have 8 valence electrons.

In this way, the so-called octet rule is fulfilled, where atoms gain, lose or share electrons with other atoms to have 8 valence electrons and thus acquire a noble gas configuration.

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

Learn more about the atom at: brainly.com/question/17545314

#SPJ4

Answer:

It would be C, Potential energy, kinetic.

Explanation:

The formulae of the metal according to the law of multiple proportions are XCl₂ and XCl₃, and X is Fe so FeCl₂ and FeCl₃

We have the two chlorides that are XyClw and XyClz. We have to show that the ratios w to z are in small whole numbers.

Compound A = 12.7 g X and 7.1 g Cl, then X must be 5.56 g

Compound B = 16.3 g X and 10.7 g Cl, then X must be 5.56 g.

7.1 x (12.7/16.3) = 5.53 g Cl for each gram of X

10.7 x (12/7/16.3) = 8.34 g Cl for each gram of X. Then what is the ratio of the two Cl numbers: Now, divide both numbers by the smaller one. That is

5.53/5.53 = 1.00

8.34/5.53 = 1.508.

Rounding off 1.508 to 1.50, then you can see that 1.0 to 1.5 is actually 2 to 3 and those are small whole numbers. Within experimental error, the law of multiple proportions is proved to be true.

The compounds must be XCl₂ and XCl₃, and X is Fe so FeCl₂ and FeCl₃ are the compounds.

To learn more about the law of multiple proportions, visit: https://brainly.com/question/28458716

#SPJ9

Emperical formula and molecular formula of compound X, both will be same that is C₅H₁₀O

An Empirical formula is the chemical formula of a compound that gives the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms in a compound .

CₓHᵧOᶻ + nO₂ ---> CO₂ + H₂O

Moles of CO₂= 1.10/44 = 0.025 ( it comes from the Mass of CO₂ divided by Mr of CO₂) 
moles of H₂O=  0.45/18 = 0.025 (Mass of H₂O divided by Mr of H₂O)
moles of compound X= 0.43/86 = 0.005 (Mass of X divided by Mr of X)

So we get the ratio  = 1:5:5, respectively  ratio of X burned, to CO₂ produced, to H₂O produced .

So the equation here becomes like this

=> CₓHᵧOᶻ + nO₂ ---> 5CO₂ + 5H₂O

 Since ratio of compound X burned to CO₂ produced is 1:5, must be 5 carbon atoms in X if 5CO₂ produced. 
Since ratio of compound  X burned to H₂O produced is also 1:5, must be 10 hydrogen atoms in X if 5H₂O produced.

so the Emperical formula becomes C₅H₁₀O

learn more about Emperical formula here-

https://brainly.com/question/13058832

#SPJ9

The cake should weigh 265 grams ordinarily. However, it could weigh less.

According to the law of conservation of mass, masses can neither be created nor destroyed during the course of chemical reactions. However, masses can be converted from one form to another.

Going by this law, the mass of the resulting cake from the illustration should be the cumulative mass of the ingredients of the cake.

However, during the process of baking, some mass might have been converted to gas and escaped into the atmosphere. Thus, the final cake may weigh less than the cumulative mass of the ingredients.

In the absence of conversion of mass to gas and no ingredient spillage during the entire process, the mass of the cake should be the cumulative mass of the ingredients.

Thus:

Mass of the cake = 150 + 70 + 45

                            = 265 grams

More on the law of conservation of mass can be found here; https://brainly.com/question/13383562

#SPJ1

The molar mass of the compound is 67.5 g/mol which chemist has synthesized.

To find the molar mass of the compound,

Using ideal gas law,  PV = nRT and can also be written as PM = dRT.

where,

P refers to the pressure which is measured in atmospheres (atm),

T refers to the temperature which is measured in kelvin (K),

R is the ideal gas law constant ,i.e, 0.0821 atm(L)/mol(K)

M is know as the molar mass (g/mol)  

d is the density (g/L).

Given data :

P = 2.88 atm

d = 7.71 g/L

R = 0.0821 atm(L)/mol(K)

T = 36 C = 36+273 K = 309 K

According to the ideal gas law,

Formula to find the molar mass can be written as -

          M = dRT

                   P

          M = (7.71 x 0.0821 x 309)

                              2.88

          M = 67.83 g

Therefore,

Molecular Formula = ClO₂

The molar mass of ClO₂ = 35.5+2 x 16 = 67.5 g.

To learn more about molar mass,

brainly.com/question/18649516

#SPJ4

Based on measurements, the following statements are described as True or False:

1. Weight is a measure of the pull of gravity on an object is True.

2. Scientists use English units of measurement is False.

3. The prefix centi- stands for one hundredth (1/100) is True.

4. A graduate is used to measure mass is False.

5. The basic unit of length in the metric system is the meter is True.

6. Volume is a measure of the amount of matter in an object is False.

7. One kilogram is less than one gram is False.

8. A measurement has two parts is True.

9. A unit is an amount used to measure something is True.

10. Most countries use the metric system. is True.

The weight of a substance is the pull of the gravity on the body.

The weight of a body is the product of the mass of the body and the acceleration due to gravity.

In measurements of the the properties of objects, the universally accepted unit used by scientists is the SI Units of measurement.

The prefix centi-  used in measurements such  as centimeter stands for one hundredth (1/100).

When measuring the mass of an object, a balance is used to measure the mass.

The basic unit of length in the metric system is the meter.

Mass is a measure of the amount of matter in an object whereas volume is the amount of space a given mass of the object occupies.

The unit of measuring mass is kilogram. One kilogram is equal to 1000 grams.

A measurement has two parts; a number and the unit. For example, mass of 2 kg.

A unit is an amount or value used to measure something.

Most countries use the metric system with some few exceptions such as the US.

Lear more about weight at: https://brainly.com/question/169242

#SPJ1

Answer:

Covalent bonds are the strongest bonds in nature and under normal biological conditions have to be broken with the help of enzymes. This is due to the even sharing of electrons between the bonded atoms and as with anything equally shared there is no conflict to weaken the arrangement.

Explanation:

Bonding electrons are described as electrons that participate in chemical bonds. Chemical bond, a strong attraction between atoms, ions, or molecules, might be the subject here. Atoms sharing electron pairs form a covalent or molecular connection. An attraction between the atomic orbitals of atoms in a molecule is called a bonding molecular orbital.

Which bonding type results in stronger bonds? What is your evidence?

A covalent bond is created when the difference between two atoms' electronegativities is too small for an electron transfer to occur and produce ions. Bonding electrons are collectively referred to as the electrons that are present between the two nuclei. The "glue" that binds the atoms into molecular structures is the bound pair.

It is the most powerful link. By sharing an electron, the two atoms in such a bond are joined together.

One Hydrogen atom with one valence electron and one Chlorine atom with seven valence electrons, for instance, make up the HCL molecule. In this instance, hydrogen and chlorine share an electron to create a single bond.

To know more about Electron bonding, click on the link below:

https://brainly.com/question/12732708

#SPJ1