............................hhh look at the picture

Answer:

the answer is 58.5g

Explanation:

23+35.5=58.5g

Answer:

1.25e-7

Explanation:

Answer:

[tex]1212.42\ \text{mph}[/tex]

Explanation:

We need to convert [tex]542\ \text{m/s}[/tex] to [tex]\text{miles/hour}[/tex]

[tex]1\ \text{mile}=5280\ \text{ft}[/tex]

[tex]1\ \text{ft}=12\ \text{inches}[/tex]

[tex]5280\ \text{ft}=5280\times 12=63360\ \text{inches}[/tex]

[tex]1\ \text{inch}=2.54\ \text{cm}=0.0254\ \text{m}[/tex]

[tex]63360\ \text{inches}=63360\times 0.0254=1609.344\ \text{m}[/tex]

So

[tex]1\ \text{mile}=1609.344\ \text{m}\\\Rightarrow 1\ \text{m}=\dfrac{1}{1609.34}\ \text{miles}[/tex]

[tex]1\ \text{hour}=60\times 60\ \text{seconds}\\\Rightarrow 1\ \text{s}=\dfrac{1}{3600}\ \text{hour}[/tex]

[tex]542\ \text{m/s}=\dfrac{\dfrac{542}{1609.34}}{\dfrac{1}{3600}}=1212.42\ \text{mph}[/tex]

The speed of the gas molecules is [tex]1212.42\ \text{mph}[/tex].

Three uses of coal:

1. Electricity generation

2. Steel production

3. Cement manufacturing and as a liquid fuel

Hope it helps!

24 ml of HCl is produced. when propane is react with chlorine it forms 24 ml of HCl.

Propane, also referred to as liquefied petroleum gas, or LPG, is a gas that is typically compressed and kept in liquid form. It is virtually odorless, harmless, and colorless; an identifying odor is added to make it detectable.

Although propane is frequently used for space and water heating, cooking, and as fuel for engines found in fleet cars, buses, forklifts, and farm irrigation engines, its usage are expanding quickly as a result of new technological advancements.

Propane is referred to as propane autogas when it is utilized as a car fuel.

Therefore, 24 ml of HCl is produced. when propane is react with chlorine it forms 24 ml of HCl.

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Explanation:

Volume of gas = 2.50 L

Temperature = 273 K

Pressure = 1 atm

Moles of gas = ?

Solution:

PV = nRT

n = PV/RT

n = 1 atm× 2.50 L / 0.0821 atm. L. K⁻¹.mol⁻¹ . 273 K

n = 2.5 atm. L /22.4 atm. L. mol⁻¹

n = 0.112 mol

Answer:

Mass is an extensive physical property, it depends on the amount of matter being measured. It is physical because it can be measured without changing a substance's chemical identity.

Answer:D

Explanation:

Among all the given options, option A is correct option that is C[tex]_4[/tex]H[tex]_{10}[/tex] + O[tex]_2[/tex] →CO[tex]_2[/tex] + H[tex]_2[/tex]O.  Combustion of hydrocarbons releases the carbon stored in fossil fuels into the atmosphere as carbon dioxide gas.

Chemical reaction, the transformation of one or more chemicals (the reactants) into one or more distinct compounds (the products). Chemical elements or chemical compounds make up substances. In a chemical reaction, the atoms that make up the reactants are rearranged to produce various products.

Chemical reactions are indeed a fundamental component of life itself, as well as technology and culture. Burning fuels, melting iron, creating glass as well as pottery, brewing beer, producing wine, and making cheese are just a few examples of ancient processes that involved chemical reactions. C[tex]_4[/tex]H[tex]_{10}[/tex] + O[tex]_2[/tex] →CO[tex]_2[/tex] + H[tex]_2[/tex]O represent Combustion reactions.

Therefore, the correct option is option A.

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Ur answer

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Pure copper will be left in the vial when CuCl_2 (Copper Chloride,) a solid powder, is reacted with Aluminum (Al), a solid, in a solution.

Hence, option D is correct.

A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.

Aluminium reacts with copper(II) chloride, [tex]CuCl _2[/tex], to form copper metal and aluminium chloride, [tex]AlCl _3[/tex].

Hence, option D is correct.

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The melting point of pure lead : 327 °C

Given

Amount of tin and melting point of solder

Required

The melting point

Solution

The composition of solder = tin and lead

So if it is 100% tin, 0% lead or 0% tin, 100% lead

From the table it is shown that when the position is 100% tin in the solder, the melting point of the solder is 232 °C, so it shows that the melting point of pure lead is obtained when% tin in solder = 0 (100% lead in solder), so that the melting point is obtained. : 327 °C

Answer:

In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons. As these planets grew in the early solar system, they were able to capture smaller objects with their large gravitational fields.

Explanation:

Answer:In the outer solar system, the gas giants Jupiter and Saturn and the ice giants Uranus and Neptune have dozens of moons. As these planets grew in the early solar system, they were able to capture smaller objects with their large gravitational fields. *Moons of planets and dwarf planets.

Explanation: .

Answer:

Gold

Explanation:

Gold(I) chloride is a compound of gold and chlorine with the chemical formula AuCl

Answer:

Explanation:

The highlighted elements of the periodic table belong to the alkali metal element family. The alkali metals are recognized as a group and family of elements. These elements are metals. Sodium and potassium are examples of elements in this family.

hope this helps

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is "mol." This site uses an exact value of 6.0221415 x 10 23 for Avogadro's number. This is the number of atoms in 1 mole of a chemical element.

Hope I helped :)

Answer:

The answer is B

Explanation:

The moon is in-between the sun and the Earth during a new moon.

Answer:It has the lowest effective nuclear charge of the four new elements.

The electronic configuration of the Organesson element is  [Rn]5f¹⁴6d¹⁰7s²7p⁶ so it has fully filled valence shell. As the last element in the periodic table, it has the largest atomic radius and the lowest effective nuclear charge. Therefore, option (C), (D), and (E) is correct.

The electron configuration gives information on how electrons are distributed in different energy levels of an atom of an element. In the electron configuration of an element, the number of electrons can be written as a superscript of electron-containing atomic subshells. For example, the electron configuration of magnesium is written as 1s²2s²2p⁶3s².

The principal quantum number (n) in electron configuration decides the maximum number of electrons that can fill in an electron shell. It is calculated from the formula 2n², where ‘n’ is the principal quantum number of the shell.

The atomic orbitals at lower energy must be fully filled before occupying an orbital at higher energy.

The atomic number of the Organesson element is 118 and the electronic configuration is [Rn]5f¹⁴6d¹⁰7s²7p⁶. Therefore, the valence shell of Organesson is fully filled. As the last element in the periodic table, it has the largest atomic radius and the lowest effective nuclear charge.

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Your question is incomplete, but most probably the complete question was,

Which statements would be expected to be true for Organesson (Og)? Select all that apply.

A. It is relatively unreactive.

B. It has a high electron affinity.

C. It has a full valence shell of electrons.

D. It has the largest atomic radius of the four new elements.

E. It has the lowest effective nuclear charge of the four new elements.

23.6 mol NaCl

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

1.42 × 10²⁵ molecules NaCl

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

23.5802 mol NaCl ≈ 23.6 mol NaCl

Answer:

Answer is endothermic.

Explanation:

I hope it's helpful!

Answer:

Three states of matter is liquid, solid and gas.

I haven't learned atoms, I just learned the states in 5th grade.

Answer:

the three states of matter are

1. solid ( atoms are closely packed )

2. liquid ( atoms are loosely packed )

3. gas ( atoms are very loosely packed )

Answer:

Q1) solids are strong, gasses are weak

Explanation:

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Answer:

Solids are strong, gases are weak

Explanation:

The attraction between molecules of a solid and gas are different in that those of solids are strong and gases are very weak.

The intermolecular attraction in gases are the weakest of the three states of matter. For the solid, they present the strongest attraction.

Answer:

[tex]\boxed {\boxed {\sf About \ 1.94 *10^{-8} \ mol \ H_2S}}[/tex]

Explanation:

To convert from molecules to moles, Avogadro's Number must be used.

This number tells us how many particles (atoms, ions, molecules, etc.) are in 1 mole of a substance. For this problem, it is moles of hydrogen sulfide.

We can use the number as a fraction.

[tex]\frac { 6.022 *10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S}[/tex]

Multiply by the given number of molecules.

[tex]1.17*10^{16} \ molecules \ H_2S *\frac { 6.022 *10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S}[/tex]

Flip the fraction so the molecules of hydrogen sulfide will cancel out.

[tex]1.17*10^{16} \ molecules \ H_2S *\frac {1 \ mol \ H_2S }{ 6.022 *10^{23} \ molecules \ H_2S}[/tex]

[tex]1.17*10^{16} *\frac {1 \ mol \ H_2S }{ 6.022 *10^{23} }[/tex]

[tex]\frac {1.17*10^{16} \ mol \ H_2S }{ 6.022 *10^{23} }[/tex]

[tex]1.94287612*10^{-8} \ mol \ H_2S[/tex]

The original measurement of molecules had 3 significant figures so we must round our answer to that.

For the number we calculated, that is the hundredth place. The 2 in the thousandth place tells us to leave the 4 in the hundredth place.

[tex]1.94 *10^{-8} \ mol \ H_2S[/tex]

There are about 1.94*10⁻⁸ molecules of hydrogen sulfide.

Answer:

The molecular equation shows each of the substances in the reaction as compounds with physical states written next to the chemical formulas. The

complete ionic equation shows each of the aqueous compounds as separate ions. Insoluble substances are not separated and these have the symbol (s) written

next to them. Water is also not separated and it has a (l) written next to it. Notice that there are ions that are present on both sides of the reaction arrow –>

that is, they do not react. These ions are known as spectator ions and they are eliminated from complete ionic equation by crossing them out. The remaining

equation is known as the net ionic equation. For example: The reaction of potassium chloride and lead II nitrate

Molecular Equation: 2KCl (aq) + Pb(NO3)2 (aq) -> 2KNO3 (aq) + PbCl2 (s)

Complete Ionic Equation: 2K+ (aq) + 2Cl-

(aq) + Pb2+ (aq) + 2NO3–

(aq) -> 2K+

(aq) + 2NO3

–

(aq) + PbCl2 (s)

Net Ionic Equation: 2Cl-

(aq) + Pb2+ (aq) -> PbCl2 (s)

Explanation:

Answer:

3.798g of H₂O

Explanation:

In 1 mole of CuSO₄.4H₂O there are 4 molecules of water. The heat produce the releasing of 4 waters of hydration. To solve this question we need to convert the mass of CuSO₄.4H₂O to moles using its molecular mass (231.67g/mol). The moles of CuSO₄.4H₂O times 4 are the moles of water:

Moles CuSO₄.4H₂O:

12.21g CuSO₄ * (1mol / 231.67g) = 0.0527 moles

Moles H₂O:

0.0527 moles * 4 = 0.2108 moles of water

Mass (Molar mass H₂O = 18.015g/mol):

0.2108 mol * (18.015g / mol) =

Answer:

for 1st question the answer is maybe 4th or 1st ( I think 4th ).

and for the 2nd question 4th ( consumers ) option is the answer

and the answer of third question is omnivores.

Answer:

1) The transfer or flow of energy.

2)Consumers

3)Omnivores

May it help you

Answer:

Explanation:

Almost all the elements combine to form compounds, although the reactivity may vary from element to element. These combinations take place because almost all the elements are unstable. ... By gaining or losing electrons, ionic compounds are produced. Sharing of electrons results in the formation of covalent compounds

Answer:

chlorine dioxide is empirical formula for CLO2.

Answer:

c) 1.55 ×10⁻² moles

Explanation:

Given data:

Number of moles of sodium = ?

Number of atoms = 9.34 ×10²¹ atoms

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

Moles of sodium atoms:

1 mole contain 6.022× 10²³ atoms

9.34 ×10²¹ atoms × 1 mol / 6.022× 10²³ atoms

1.55 ×10⁻² moles