How many atoms are in 5 moles of Lithium?

a
35 atoms
b
3.0 *10^24 mol
c
3.0 * 10^24
d
35 g/mol

Answer:

Purple

Explanation:

Violet colour light has the highest frequency.

The frequency of violet colour light is. 5 × 10 14 Hz .

Yes Compounds are generally made of two or more atom or ion or species!

TRUE

The statement that "compounds must contain at least two element" is true.

A chemical compound is a substance composed of many identical molecules containing atoms from more than one chemical element and held together by chemical bonds.

As a result, a molecule composed of only one element's atoms is not a compound.

A chemical formula uses standard chemical symbols with numerical subscripts to specify the number of atoms of each element in a compound molecule.

The Chemical Abstracts Service assigns a unique CAS number identifier to many chemical compounds.

Organic compounds are crucial even though carbon is found in all living organisms.

They are the fundamental components of many of the earth's cycles. The carbon cycle, for example, includes the exchange of carbon between plants and animals during photosynthesis and cellular respiration.

Thus, the given statement is true.

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Answer:

The coefficient that must be placed against NaCl to balance this equation is 2.

Explanation:

You have the unbalanced equation:

BaCl₂(aq) + Na₂CO₃(aq) → BaCO₃(s) + NaCl(aq)

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.

Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts .

Left side:  1 barium Ba, 2 chlorine Cl, 2 sodium Na, 1 carbon C and 3 oxygen O.

Right side:  1 barium Ba, 1 chlorine Cl, 1 sodium Na, 1 carbon C and 3 oxygen O.

In this case, carbon, barium and oxygen have the same amount on both sides, so it only remains to balance the chlorine and the sodium.  

The coefficients in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter subscripts.

By multiplying the mentioned coefficient by the subscript, you get the quantity of each element present in the reaction.

To balance the chlorine and the sodium, you can modified the coefficients in front of the molecule NaCl  as it's shown in the following:

BaCl₂(aq) + Na₂CO₃(aq) → BaCO₃(s) + 2 NaCl(aq)

Then:

Left side:  1 barium Ba, 2 chlorine Cl, 2 sodium Na, 1 carbon C and 3 oxygen O.

Right side:  1 barium Ba, 2 chlorine Cl, 2 sodium Na, 1 carbon C and 3 oxygen O.

Finally, you have the same amount of each element on both sides.

The coefficient that must be placed against NaCl to balance this equation is 2.

Answer:

2

Explanation:

4 significant figures.

As the number is expressed in standard form, you only need to look at the coefficient.

This is because \(1.006 * 10^7 = 10060000\), so multiplying by 10 to the power of anything just results in zeros at the end of the number. A zero at the end is not a significant figure, so is ignored.

This means that you look at 1.006 for the significant figures.

The first non-zero digit is 1, so this is the first significant figure. There is then a zero, another zero, and finally a six. This is a total of 4 significant figures.

The number 1.006 x 10^7 has 4 significant figures. These include the '1', and the three digits following the decimal point - '0', '0', '6', which all contribute to its precision.

The number 1.006 x 10^7 includes significant figures which are digits carrying meaningful contributions to its measurement precision. This number has 4 significant figures: the '1', and the three numbers after the decimal point, '0', '0', and '6'. Every non-zero number is always significant; zeroes between two significant digits are significant. Here, the zeroes aren't placeholders but significant digits, thus contributing to the precision of the measurement.

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Answer:

1099.426

Explanation:

Chlorine has configuration 1s² 2s² 2p⁶ 3s² 3p⁵

We can find as after counting the number of electrons from the above equation find the Atomic number

i.e, 2+2+6+2+5 =17

Atomic number 17 represents chlorine in the periodic table.

Here are some facts about chlorine that you may find interesting

1)Chlorine is used to make a wide range of products, including plastics, paper, medicine, insecticides, disinfectants, textiles, dyes, and petroleum products. It is commercially extracted from brine solutions via electrolysis.

2)Sir Humphry Davy, a Cornish chemist, discovered chlorine as a chemical element in 1809.

3)Chlorine is used to kill harmful bacteria in drinking water and swimming pool water.

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In the given reaction, the limiting reactant is C₆H₆ (benzene).

To determine the limiting reactant as well as calculate the mass of HCl produced, compare the moles of each reactant.

The number of moles for each reactant:

Molar mass of Cl₂ = 35.5 g/mol + 35.5 g/mol = 71 g/mol

Moles of Cl₂ = mass of Cl₂ / molar mass of Cl₂

                     = 45 g / 71 g/mol

                     = 0.634 moles of Cl₂

Molar mass of C₆H₆ (benzene) = 12 g/mol + 6(1 g/mol) = 78 g/mol

Moles of C₆H₆ = mass of C₆H₆ / molar mass of C₆H₆

                        = 45 g / 78 g/mol = 0.577 moles of C₆H₆

Determine the stoichiometry between Cl₂ and HCl:

Cl₂ + C₆H₆ → C₆H₅Cl + HCl

Here, we can see that 1 mole of Cl₂ produces 1 mole of HCl.

Thus, the limiting reactant is C₆H₆ (benzene).

Calculate the mass of HCl produced:

Molar mass of HCl = 1 g/mol + 35.5 g/mol = 36.5 g/mol

Moles of HCl produced = moles of C₆H₆ = 0.577 moles

Mass of HCl produced = moles of HCl produced × molar mass of HCl

Mass of HCl produced = 0.577 moles × 36.5 g/mol

                                     ≈ 21.04 g

Therefore, approximately 21.04 grams of HCl will be produced.

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Answer:

Explanation:

An acid acts to increase the hydrogen ion concentration of a solution. A base acts to decrease the hydrogen ion concentration of a solution. A buffer acts to maintain a relatively stable concentration of hydrogen ions in a solution. As the hydrogen ion concentration of a solution decreases, the pH rises. As the pH of a solution increases, the concentration of hydroxide ions increases. The pH of a solution is defined as the negative logarithm of the hydrogen ion concentration.

Empirical formula is N₂O

An empirical formula for a compound is the formula of a substance written with the smallest integer subscript

Here given data is

N = 0.2144 g

O = 0.1224 g

We have to calculate the empirical formula = ?

So mass of compound/moles

Empirical formula =  0.2144 g/14g/mol = 0.0153 mol

Empirical formula =  0.1224 g/16g/mol = 0.0076 mol

Then smallest mole value is 0.0076 mol

Divide the nitrogen mole by smallest value then

N = 2.0008

O = 1

Then take the closest whole number

Then the ratio is 2 : 1

So the empirical formula is N₂O

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In 4.38 × 10^21 molecules of water, there are approximately 0.073 moles.

To calculate the number of moles, we can use Avogadro's number, which states that 1 mole of a substance contains 6.022 × 10^23 molecules. So, by dividing the given number of molecules (4.38 × 10^21) by Avogadro's number, we can find the number of moles.

Now, let's explain the process in detail. Avogadro's number is a constant that represents the number of particles (atoms, molecules, etc.) in one mole of a substance. It is approximately 6.022 × 10^23. Therefore, if we divide the given number of molecules by Avogadro's number, we can determine the number of moles.

In this case, we divide 4.38 × 10^21 molecules by 6.022 × 10^23 molecules/mole, resulting in approximately 0.073 moles.

Significant figures play an important role in reporting the answer. The given number of molecules has three significant figures (4, 3, and 8), so our answer should be reported with three significant figures as well. Therefore, the number of moles is approximately 0.073.

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The properties of hard and soft materials refer to their physical characteristics and behaviors.

These properties are related to factors such as the arrangement of molecules, bonding strength, and response to external forces. Here, we will discuss the general properties of hard and soft materials.

Hard materials:

Rigidity: Hard materials exhibit high stiffness and resist deformation under applied forces. They tend to maintain their shape and structure.

High strength: Hard materials have strong intermolecular or intramolecular forces, allowing them to withstand high stress and pressure without breaking or deforming.

High melting and boiling points: Hard materials often have high melting and boiling points due to the strong bonds between their atoms or molecules.

Brittle: Hard materials are often brittle, meaning they have low tolerance to tensile or bending forces and are prone to fracturing or shattering instead of deforming.

Low compressibility: Hard materials have low compressibility, meaning they do not easily compress or change volume under pressure.

Soft materials:

Flexibility: Soft materials are pliable and easily deformable under applied forces. They can be bent, stretched, or compressed without breaking.

Low strength: Soft materials have weak intermolecular or intramolecular forces, making them more susceptible to deformation or damage under stress.

Low melting and boiling points: Soft materials generally have lower melting and boiling points compared to hard materials.

Ductile: Soft materials are often ductile, meaning they can be drawn into thin wires or stretched into thin sheets without fracturing.

High compressibility: Soft materials can be easily compressed or change volume under pressure due to their loosely packed molecular structures.

It's important to note that these properties are generalizations, and there can be variations within each category. Some materials may exhibit properties that fall between hard and soft, or they may have unique combinations of properties. Materials' properties play a crucial role in various applications, as they determine their suitability for specific uses such as construction, manufacturing, and design.

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Answer:

Axel: Much of the water is in the air around us.

Explanation:

When a puddle of water forms on the ground, it indicates that much of the ground around it is saturated with water and as such, the water would not readily soak into the ground. Also, since the puddle was found in a park, it is not likely that the water has gone into a stream, river, pond, lake, or ocean.

Since, the day was a sunny, it means that the heat from the sun has caused the evaporation of the water molecules. However, the water vapor molecules do not just immediately rise up to the atmosphere to form clouds nor do they cease to exist, rather it is dispersed in the air around the surroundings and beyond. Formation of clouds by water vapor takes days to happen.

Also, the water has not changed to fog either as they form usually at cooler temperatures.

Answer:

true

Explanation:

Answer:

So basicly it is basic

Explanation:

Take the -logarithm of the concentration of hydrogen ions that are in the solution: pH=−log(1×10−8M)=8. Therefore, the pH of the solution is 8

Answer:

i think the answer is... A

Answer:

C is the correct option.

Explanation:

During reduction atoms gain of electrons

Oxidation loss of electrons

During a redox reaction some atoms gain electrons and some lose electrons. Therefore, option C is correct.

Redox reactions include a change in the oxidation state of the substrate. When electrons are lost or the oxidation state increases, it is called oxidation; when they are gained or the oxidation state decreases, it is called reduction.

A chemical process in which electrons are moved between two reactants is referred to as a redox reaction. The alteration in the oxidation states of the reacting species can be used to pinpoint this electron transfer.

Oxidation and reduction always occur jointly because any loss of electrons by one substance must be followed by a gain of electrons by another. Therefore, oxidation-reduction processes or simply redox reactions are other names for electron-transfer events.

Thus, option C is correct.

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Answer:

13.3 atm(assuming the temperature given is in Celsius)

Explanation:

First, the moles of each gas must be found. .25 mol He, .50 mol CO, .33 mol NO. Next, each set of mols must be plugged into the ideal gas law, PV=nRT, for each gas. Move it around so you get the pressure P=nRT/V. When you calculate everything, you should get 3.08atm He, 6.15atm CO, and 4.06atm NO. Add these together and you get the pressure of the container.

Answer:

A Intrusive

Explanation:

I go to K12 and they say that's the answer

The density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

To determine the density of ammonia gas (NH3) in a 6.0 L container at a pressure of 820 mm Hg, we need to use the ideal gas law equation, which relates pressure, volume, number of moles, and temperature for a given gas.

The ideal gas law equation is:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since we are given the pressure (820 mm Hg), volume (6.0 L), and assuming standard temperature and pressure (STP), we can use the values for R (0.0821 L·atm/(mol·K)) and convert the pressure to atm by dividing by 760 (1 atm = 760 mm Hg).

820 mm Hg / 760 mm Hg/atm = 1.08 atm

Now we can rearrange the ideal gas law equation to solve for density (d):

d = (P * M) / (RT)

Where M is the molar mass of ammonia (NH3), which is approximately 17.03 g/mol.

Substituting the values, we have:

d = (1.08 atm * 17.03 g/mol) / (0.0821 L·atm/(mol·K) * 298 K)

Simplifying the equation, we find:

d ≈ 0.805 g/L

Therefore, the density of ammonia gas in the 6.0 L container at a pressure of 820 mm Hg is approximately 0.805 g/L.

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Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer: There are \(145 \times 10^{23}\) atoms in 24 moles of Fe.

Explanation:

According to the mole concept, 1 mole of a substance contains \(6.022 \times 10^{23}\) atoms.

Therefore, atoms present in 24 moles of Fe are calculated as follows.

\(24 mol \times 6.022 \times 10^{23} atoms/mol\\= 144.52 \times 10^{23} atoms\\or, 145 \times 10^{23} atoms\)

Thus, we can conclude that there are \(145 \times 10^{23}\) atoms in 24 moles of Fe.

Answer:

126.0g of water were initially present

Explanation:

The electrolysis of water occurs as follows:

2H₂O(l) ⇄ 2H₂(g) + O₂(g)

Where 2 moles of water produce 2 moles of hydrogen and 1 mole of oxygen.

To find the mass of water we need to determine moles of oxygen and hydrogen, thus:

Moles Hydrogen:

14.0g H₂ ₓ (1mol / 2g H₂) = 7 moles H₂

Moles Oxygen:

112.0g O₂ ₓ (1mol / 32g) = 3.5 moles O₂

Based on the chemical equation, the moles of water initially present were 7 moles (That produce 7 moles H₂ and 3.5 moles O₂). The mass of 7 moles of H₂O is:

7 moles H₂O * (18g / mol) =

Explanation:

You have 112 g of Fe.

The atomic mass of Fe is 56 g/mol

112g Fe/ 56g/mol = 2 mol Fe  <---- you have to convert to moles of iron(iii) sulfate

From the balanced equation, you get that 2 moles of Fe react to produce 1 mole of Fe2(SO4)3

So, to convert:

2 mol Fe* (1 mol Fe2(SO4)3 / 2 mol Fe) = 1 mol Fe2(SO4)3

moles of Fe cancel and the answer is 1 mole of iron(iii) sulfate.

Valence electrons are the electrons in the outermost shell of an atom and are responsible for chemical reactions. In a chemical reaction, atoms gain or lose electrons to achieve a stable electron configuration, which is known as the octet rule. The number of valence electrons an atom has determines its chemical reactivity and how it will bond with other atoms. For example, atoms with only a few valence electrons, such as hydrogen, are highly reactive and will readily form chemical bonds, while atoms with many valence electrons, such as noble gases, are relatively unreactive and do not easily form chemical bonds.

Answer:

Yeah, if you have the atomic number and neutron number

\(mass = protons + neutrons\)

protons is the atomic number

The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.

Isotopes are atoms with the same number of protons but differing numbers of neutrons.

They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.

An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.

However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.

They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.

Thus, the correct option is A.

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Answer:

166.11 mol

Explanation:

I hope you mean molecules

1 mol of anything is 6.02 * 10^23

x mol of anything is 1 * 10^26

1/x = 6.02 * 10^23/1 * 10^26              Cross multiply

1 * 1*10^26 = 6.02*10^23 * x              Divide by 6.02*10^23

1*10^26/6.02 * 10^23 = x

x = 166.11 mol

Answer:

When we combine oxygen, and iron rust is produce.

Explanation:

The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.