How many grams are in 4.25 moles of NiS?

Explanation:

₇N = 1s² 2s² 2p³

Therefore,

Option C is correct ✔

Pyruvate is a byproduct of glycolysis.The oxidative deacetylation of pyruvate to produce carbon dioxide and acetyl CoA is catalyzed by the multienzyme complex dopamine dehydrogenase complex (PDH complex).Pyruvate + CoA + NAD+ ----> Acetate CoA + NADH + H++ CO2. Acetyl CoA ———- Citric Acid Cycle is the general equation for the reaction.

Coenzyme A is joined with the oxidized two-carbon acetyl group to generate acetyl CoA.

The pyruvate dehydrogenase (PDH) enzyme, which is a component of the multienzyme PDC and is frequently described to as a "gatekeeper" in the oxidation of carbohydrates, catalyzes the physiologically irreversible conversion of pyruvate to acetyl-CoA.

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Maddy made the error of multiplying by 10 rather than 100, which produced an answer that was 10 times off in the conversion of units.

The work of Maddy is flawed. We must multiply the value in grammes by 100 to convert it to centigrammes. Maddy gave the wrong answer of 7.5 cg by multiplying the weight in grammes by 10 rather than 100.

In order to convert 0.75 grammes to centigrammes, use the following formula:

100 cg/g x 0.75 g equals 75 cg

Consequently, 0.75 grammes is 75 centigrammes. Maddy made the error of multiplying by 10 rather than 100, which produced an answer that was 10 times off.

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Answer:

The Nucelous helps prevent bad cells in

Explanation:

Answer:

CH3CHO+H2O → CH3OCH3 - addition

CH,CICH CI + Zn → C2H4 + ZnCl2 - elimination

CH3CH3Br + OH – CH3CH3OH + Br - substitution

2CH2COOH >>(CH3CO)20 + H20 - condensation

Explanation:

An addition reaction is a reaction in which a specie is added across the double bond as we can see in CH3CHO+H2O → CH3OCH3.

In an elimination reaction, a small molecule is lost from a saturated compound to form the corresponding unsaturated compound as in CH,CICH CI + Zn → C2H4 + ZnCl2

In a substitution reaction, a chemical moiety replaces another in a molecule as in; CH3CH3Br + OH – CH3CH3OH + Br .

A condensation reaction is in which two molecules are joined together to form a bigger molecule as in; 2CH2COOH >>(CH3CO)20 + H20.

Answer:

addition

elimination

substitution

condensation

Explanation:

A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds

The evidence in figure 2 and table 1 which describes the changes in the rock after a year is the presence of a round edge.

This is referred to as the breaking down or dissolving of rocks and minerals on Earths surface through elements such as wind, water etc.

In the diagram given, the rock previously had a sharp edge but as time went on there was breakdown of the edges which resulted in it becoming round and is therefore the evidence that weathering most likely occurred in the rock.

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The heat that have been evolved is  888.4 kJ while the internal energy is 13 J

The heat of combustion is typically determined through a calorimetric experiment, in which a substance is burned in a calorimeter and the heat released is measured and quantified. The heat of combustion can also be calculated from the chemical equation for the combustion reaction, using the principle of the conservation of energy.

Number of moles of the propane = 25 g/62 g/mol

= 0.4 moles

If 1 mole of propane gives out 2221 kJ

0.4 moles of propane would give out  0.4 moles * 2221/1

= 888.4 kJ

We know that;

ΔE = q + w

= 25 - 12

= 13 J

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Answer:

Rubber

Rubber

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Answer:

The concentration takes 25.360 seconds to decrease to one-ninth of its initial value.

Explanation:

The decomposition of the compound has an exponential behavior and process can be represented by this linear first-order differential equation:

\(\frac{dc}{dt} = -\frac{1}{\tau}\cdot c(t)\)

Where:

\(\tau\) - Time constant, measured in seconds.

\(c(t)\) - Concentration of the compound as a function of time.

The solution of the differential equation is:

\(c(t) = c_{o} \cdot e^{-\frac{t}{\tau} }\)

Where \(c_{o}\) is the initial concentration of the compound.

The time is now cleared in the result obtained previously:

\(\ln \frac{c(t)}{c_{o}} = -\frac{t}{\tau}\)

\(t = -\tau \cdot \ln \frac{c(t)}{c_{o}}\)

Time constant as a function of half-life is:

\(\tau = \frac{t_{1/2}}{\ln 2}\)

Where \(t_{1/2}\) is the half-life of the composite decomposition, measured in seconds.

If \(t_{1/2} = 8\,s\), then:

\(\tau = \frac{8\,s}{\ln 2}\)

\(\tau \approx 11.542\,s\)

And lastly, given that \(\frac{c(t)}{c_{o}} = \frac{1}{9}\) and \(\tau \approx 11.542\,s\), the time taken for the concentration to decrease to one-ninth of its initial value is:

\(t = -(11.542\,s)\cdot \ln\frac{1}{9}\)

\(t \approx 25.360\,s\)

The concentration takes 25.360 seconds to decrease to one-ninth of its initial value.

Answer:

The CDC estimates the total economic burden of prescription opioid misuse in the United States is $78.5 billion a year.

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Answer:

A.) 28

Explanation:

The mass number is the number of protons and neutrons within a particular atom. The charge of the atom is irrelevant because the mass number is not affected by the number of electrons.

Unless this atom is an isotope (different number of neutrons), there should be an equal amount of protons and neutrons.

As such, since the mass number is 56, there should be 28 protons and 28 neutrons (56 / 2 = 28).

Ethyne gas undergo combustion reaction to give two moles of carbon dioxide and water as per the balanced equation written below:

\(\rm C_{2} H_{2} + \frac{5}{2} O_{2} \rightarrow 2CO_{2} + H_{2}O\)

Combustion is a type of reaction in which a gas burns in oxygen to give water and carbon dioxide. Hydrocarbons alkanes, alkenes or alkynes easily undergo combustion reaction and they can be used as fuels.

C₂H₂ is an alkyne names ethyne and it is an unsaturated hydrocarbon with triple bond between two carbon atoms. Ethyne gas reacts with oxygen to give two moles of carbon dioxide and one mole of water.

To balance the number of carbons the right side carbon dioxide is multiplied by 2 and the number of oxygens is balanced accordingly to get the balanced equation as follows:

\(\rm C_{2} H_{2} + \frac{5}{2} O_{2} \rightarrow 2CO_{2} + H_{2}O\)

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It's a chemical change.

Explanation:-

Formation of crystals of sugar from a sugary syrup is a chemical change. Because, we cannot get sugary syrup back from the sugar crystals. Yet, it is chemical change.

Answer:

mixtures are physically combined structures that are separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.

Explain:

yw

ask your mom and your family

Step 1

The reaction provided:

2 C4H10 + 13 O2 = 8 CO2 + 10 H2O (completed and balanced)

------------

Step 2

Information provided:

100 g of butane (C4H10)

----

Information needed:

The molar masses of:

C4H10) 58.12 g/mol

CO2) 44.01 g/mol

(the periodic table is helpful here)

------------

Step 3

By stoichiometry,

2 C4H10 + 13 O2 = 8 CO2 + 10 H2O

2 x 58.12 g C4H10 ------------ 8 x 44.01 g CO2

100 g C4H10 ------------ X

X = 100 g C4H10 x 8 x 44.01 g CO2/2 x 58.12 g C4H10

X = 303 g approx.

Answer: 303 g of CO2 produced

Answer:

it's answer is 2.564M

Explanation:

M= 250/58.5

=2.564M

Answer:

Calculate the mass in grams.

Answer: Calculate the mass in grams of calcium bromide the chemist has added to the flask. Round your answer to 3 significant digits.

Explanation:

Answer:

What are the following substances?

Explanation:

Answer:

since,hydrogen bonding requires a strongly electronegative atom bonded to a hydrogen atom,only HF willexhibit hydrogen bonding,as afluorine is sufficiently partially positive hydrogen that can form bondwith a lone pair an oxygen in water .

Hope this help u

Answer:

frogs don't spend all their time swimming, nor do they spend all ... The frog is capable of sitting perfectly still for hours on end, only to suddenly ... When a frog is resting or hunting, he will sit on whatever is handy.

Explanation:

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Answer:

by adding heat

Explanation:

Adding heat can cause ice (a solid) to melt to form water (a liquid). Removing heat causes water (a liquid) to freeze to form ice (a solid).

by adding heat

when water was changes to soild or a gas , we say change to a different state of the matter. Even though the waters physical from change its molecular stay the same

Answer:

1 Answer. 1 mole of ferric sulfate contains 2 moles of iron, and 12 moles of oxygen atoms, and three moles of sulfate ions.Sep 29, 2016

Explanation:

Answer: If the Sun had an even greater mass then it currently does, it would have a larger gravitational pull and since it's heat would be closer to Earth, both by magnitude and gravity, life on Earth wouldn't be possible and life on Mars would be reality. Also, when the sun would explode, it would have a larger supernova and possibly create a white dwarf (something that only happens to red supergiant stars when they die), with a gravitational force so strong it wold have two beams of light coming out it's north and south poles (like a black hole).

I hope this helps!

The periodic table of elements have a vertical column that tell you the number of groups and horizontal rows that tell you the number of periods.

Periodic table is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table contains elements that are arranged in seven horizontal rows, called periods and 18 vertical columns, called groups.

Elements in the same group have the same number of valence electrons while elements in the same period have the same number of electron shells.

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Answer:

Explanation:

Before proceeding to answering the questions, let's try and understand each term.

Gravitational energy can be defined as the potential energy an object has when placed in a high position (compared to been placed in a low position). Examples include; a knife been placed at the top of the cupboard, a ball at the top of a hill.

Nuclear energy can be defined as the energy released or consumed as a result of splitting or joining together of the nuclei (plural of nucleus) of atom(s). The process of splitting an atomic nucleus is called nuclear fission while the process of joining two nuclei of atoms is called nuclear fusion.

Radiant energy can be defined as the energy of electromagnetic wave. One of the properties of electromagnetic waves is that they travel through space. Examples include X-rays and light

Stored mechanical energy can be defined as the potential energy an object has as a result of the application of force. Examples include; a stretched rubber band, a compressed spring

Answer:

\(\huge\boxed{V = 2.3\ dm^3}\)

Explanation:

Given:

Moles = n = 0.275 moles

Temperature = T = 75 K

Pressure = P = 1.75 atm

Ideal gas constant = R = 8.314 J/mol K

Required:

Volume = V = ?

Formula:

PV = nRT

Solution:

Rearranging Formula

\(\sf V = \frac{nRT}{P} \\\\Putting \ values\\\\V = \frac{(0.275)(8.314)(75)}{1.75} \\\\V = \frac{4.00}{1.75} \\\\V = 2.3\ dm^3\)

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Taking into account the ideal gas law, the volume of the gas is 0.966 L.

An ideal gas is a theoretical gas that is considered to be composed of randomly moving point particles that do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

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, you know:

Replacing in the ideal gas law:

1.75 atm×V = 0.275 moles×0.082\(\frac{atmL}{molK}\)×75 K

Solving:

V= (0.275 moles×0.082\(\frac{atmL}{molK}\)×75 K)÷ 1.75 atm

V=0.966 L

Finally, the volume of the gas is 0.966 L.

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The answer is C.

The rate of the forward reaction and the rate of reverse reaction are equal at equilibrium.

Answer:

the last one i think

Explanation: