what is the mass of 9.6 x10^23 atoms of iron?

Answer:

6NO2+3H2O-------->3HNO2+3HNO3

Answer:

fungi

Yeasts are eukaryotic organisms that are included in a group of organisms called “fungi,” which also includes molds and mushrooms. Yeasts can have both positive and negative effects on fermented products consumed by humans and animals.

Explanation:

Answer:  Fungi

Explanation:

Yeasts are eukaryotic organisms that are included in a group of organisms called “fungi,” which also includes molds and mushrooms. Yeasts can have both positive and negative effects on fermented products consumed by humans and animals.

Answer:A

Explanation:

To do the experiment

The experimental setup is the part of the scientific method that is done to prove the hypothesis. The test variable of the experiment is the height of the tray as it may cause an effect. Thus, option C is correct.

The independent variable has been the test variable that does not depends on other variables and is manipulated by the researcher. It has no fixed value and parameter and is subject to alteration so as to cause an effect on the other variable.

The height of the tray is the independent variable and the mass of the sand is the dependent variable. The height affects the mass of the sand eroded at the bottom. The speed and amount of water have been the controlled variable.

Therefore, option C. the height of the tray with the sand is the independent variable.

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Answer:

The answer is negative .

Answer:2.14 moles

Explanation:

n=PV/RT

n=(3.2×16.2)÷(0.0821×(22+273.15)

n= 2.14 moles2

225

To calculate total pressure, simply sum the partial pressures of each gas.

Answer:

the particles must 1. collide

2. with sufficient energy

3. in proper orientation.

Explanation:

hope this helps

The presence of which Fe²⁺ ion usually produces a colored solution. Therefore, option C is correct.

An ion can be described as a chemical specie that exhibited a positive or negative charge. The term ‘ion’ can be referred to atoms or molecules with non-zero charges on them. Therefore, all atoms have more electrons than protons or more protons than electrons.

If the number of protons in atomic structure is greater than electrons are termed to hold a net positive charge and are referred to as cations. The ions that contain a greater number of electrons than protons in atomic structure hold a net negative charge are anions.

The electronic configuration of the iron is [Ar]3d⁶4s². As the iron atom losses 2 electrons in its valence shell, it becomes a cation  Fe²⁺ ion. As it has four unpaired electrons produces a colored solution.

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The molar mass of insulin is approximately 0.798 g/mol, calculated using the equation for osmotic pressure and the given values of mass and volume.

To calculate the molar mass of insulin, we can use the equation for osmotic pressure:

π = (n/V)RT

where π is the osmotic pressure, n is the number of moles of solute, V is the volume of the solution in liters, R is the ideal gas constant, and T is the temperature in Kelvin.

First, convert the given values to appropriate units:

25.0 mg = 0.025 g
5.00 mL = 0.005 L

Next, rearrange the equation to solve for n (number of moles):

n = (πV) / (RT)

Substituting the given values:

n = (15.5 mmHg * 0.005 L) / ((0.0821 L·atm/(mol·K)) * 298 K)

Calculate n:

n ≈ 0.0313 mol

Finally, divide the mass of insulin (0.025 g) by the number of moles (0.0313 mol) to find the molar mass:

Molar mass = 0.025 g / 0.0313 mol

Molar mass ≈ 0.798 g/mol

So, the molar mass of insulin is approximately 0.798 g/mol.


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Answer:

=> 2.8554 g/mL

Explanation:

To determine the formula to use in solving such a problem, you have to consider what you have been given.

We have;

mass (m)     = 16.59 g

Volume (v) =  5.81 mL

From our question, we are to determine the density (rho) of the rock.

The formula:

\(p = \frac{m}{v}\)

Substitute the values into the formula:

​\(p = \frac{16.59 g}{5.81 mL} \\ = 2.8554 g/mL\)

= 2.8554 g/mL

Therefore, the density (rho) of the rock is 2.8554 g/mL.

i think the answer is A and D

The biodiversity of the reef depends upon the location and corals die in the muddy water.

Coral reef:

These are the ecosystem of sallow water in the oceans. They made by reef building corals. It is one of the most diverse ecosystem.

Therefore, the biodiversity of the reef depends upon the location and corals die in the muddy water.

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Sodium (Na) requires the least amount of energy to remove the most loosely held electron from a gaseous atom in the ground state.

Why sodium requires least amount of energy to remove most loosely electrons?

One electron only makes up the outermost shell of sodium as its electronic configuration of sodium is 2,8,1. While bromine has seven electrons and calcium has two. Silver is also typically the least reactive. As a result, sodium is the element that can lose one electron with the least amount of energy.

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The empirical formula for the ccompound, given the data is C₇H₈

The mass OC carbon in the compound can be obtained as follow:

Mass of C = (12 / 44) × 4.10

Mass of C = 1.118 mg

Mass of H = (2 / 18) × 0.959

Mass of H = 0.107 mg

The empirical formula can be obtained as follow:

Divide by their molar mass

C = 1.118 / 12 = 0.093

H = 0.107 / 1 = 0.107

Divide by the smallest

C = 0.093 / 0.093 = 1

H = 0.107 / 0.093 = 1.15

Multiply through by 7 to express in whole number

C = 1 × 7 = 7

H = 1.15 × 7 = 8

Thus, the empirical formula of the compound is C₇H₈

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The correct statement is c. K > 1.

To assess whether a chemical or physical process is spontaneous or not, Gibbs free energy (G) is a thermodynamic number that combines the enthalpy (H) and entropy (S) of a system.

If G is negative, the process is spontaneous and doesn't require any outside energy. If G is positive, the process is not automatic and needs the energy to move on. The system is in equilibrium if G is zero.

If ΔG° (standard Gibbs free energy change) for a reaction is negative, it indicates that the reaction is thermodynamically favorable and spontaneous under standard conditions. In such cases, the equilibrium constant (K) for the reaction would be greater than 1. Therefore, the correct statement is c. K > 1.

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Answer: the direction of decreasing temperature

Answer:

Reduction

Explanation:

An easy thing to remember is:

Oxidation= adding oxygen

Reduction= taking away oxygen

Reduction (reduce)

The pressure that is the difference between the net hydrostatic pressure and the net colloid osmotic pressure

is called: net filtration pressure.

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Complete question: The difference between net hydrostatic pressure and net osmotic pressure is called the ______.

a. net osmotic pressure

b. interstitial fluid pressure

c. net hydrostatic pressure

d. net filtration pressure

Explanation:

The periodic table is an arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations and recurring chemical properties.

The concentration of the original solution is 15.63 M.

The original solution concentration can be found using the formula

\(C_1V_1 = C_2V_2,\)

where \(C_1\) is the original solution concentration,

\(V_1\) is the volume of the original solution,

\(C_2\) is the concentration of the sample solution, and \(V_2\) is the volume of the sample solution.

In this case,

\(C_1\)= (2.50 M)(100.0 ml) / (16.0 ml)

\(C_1\) = 15.63 M

Therefore, the concentration of the original solution is 15.63 M.  

\(C_1V_1 = C_2V_2,\) is based on the principle of conservation of mass, which ensures that the total number of solute particles remains constant when a solution is diluted or concentrated.

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Answer:

Atoms of sulfur = 9.60⋅g32.06⋅g⋅mol−1×6.022×1023⋅mol−1

Explanation:

because the units all cancel out, the answer is clearly a number, ≅2×1023 as required.

The amide group in salicylamide is electron withdrawing, the hydroxyl group on the ring is a highly active, electron donating substituent. The hydroxyl group donates electrons, guided entry iodide to a para position.

A substituent is an atom that are substituted for an atom here on parent chain of such a hydrocarbon in both chemistry and biochemistry constituting a moiety of the resulting new molecule.

Alkyl groups are substitutes created from alkanes. The names of alkyl groups and unbranched alkane chains are similar. Alkyl groups may branch as well. For instance, the butyl substituent has three constitutional isomers.

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A reducing chemical reaction adds an electron to the substrate.

Reduction is a term used to describe the yield of electrons, the accumulation of hydrogen, or the reduction of oxygen from the substrate.

When a reactant accumulates electrons during a reaction, it is called reduction. Reduction reactions include the addition of electrons to a substrate and the donor of the electrons is a reducing agent that itself brings oxidization. Therefore a reducing chemical reaction retains the addition of electrons to a substrate.

Oxidation-reduction (redox) reactions consist of the transfer of electrons between compounds while catabolic reactions are the type of reactions in which complex substances are split down into simpler units with the discharge of energy. Therefore these options are incorrect

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Answer:

Since the foil has a mass of 830 g, you can use the density to find its volume 830g ⋅ 1 cm3 2.70g = 307.4 cm3 You now know that the volume of the foil is

Explanation:

The density (more precisely, the volumetric mass density; also known as specific mass), of a substance is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: ρ=m/V where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is loosely defined as its weight per unit volume, although this is scientifically inaccurate – this quantity is more specifically called specific weight.

Answer:

Average atomic mass of X= 64.25 amu

Explanation:

Abundance of X-64 = 80%

Abundance of X-65 = 15%

Abundance of X-66 = 5%

Average atomic mass = ?

Solution:  

Average atomic mass of X = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass)  + (abundance of 3rd isotope × its atomic mass)  / 100

Average atomic mass of X= (80×64)+(15×65) +(5×66) /100

Average atomic mass of X =  5120 + 975 + 330 / 100

Average atomic mass of X  = 6425/ 100

Average atomic mass of X= 64.25 amu.

Answer:

The temperature will be 189.70 K.

Explanation:

Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:  

P*V = n*R*T

where P is the gas pressure, V is the volume that occupies, T is its temperature, R is the ideal gas constant, and n is the number of moles of the gas. The universal constant of ideal gases R has the same value for all gaseous substances.

In this case:

Replacing:

2 atm* 35 L= 4.5 moles* 0.082 \(\frac{atm*L}{mol*K}\) * T

Solving:

\(T=\frac{2 atm* 35 L}{4.5 moles* 0.082\frac{atm*L}{mol*K} }\)

T= 189.70 K

The temperature will be 189.70 K.

Answer:

1.2

Explanation:

Answer:

Explanation:

Neils Bohr in 1913 put forward his own model of the atoms based on the quantum mechanics originally developed by Planck.

Answer:

It showed that electrons could jump from one path to another

Explanation:

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