Two factors that determine kinetic energy are
speed and distance
mass and speed
mass and distance
distance and time

Answer:

1.answer = pushing force

= pulling force

=gravity force

Answer:

will you help us with that one please

The masses of dimethylamine and dimethylammonium chloride we need to prepare 8. 00 l of pH = 12. 00 buffer is 905 gm.

A buffer solution is defined as an acid or a base aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa whose pH changes very little when a small amount of a strong acid or base is added to it.

For above given information, the dimethylamine (CH₃)₂NH and dimethylammonium chloride (CH₃)₂NH * HCl are mixed to prepare a buffer solution

The concentration of the components is given as 0.5M , Volume = 5L

No. of moles = CV = 0.5 * 5 =2.5 moles

2.5 moles of dimethylamine = mass/ Molecular weight

Molecular weight of dimethylamine = 45 gm

Therefore the mass of dimethylamine required = 45 * 2.5 = 112.5gm

4 moles of dimethylammonium chloride = 362 gm

Therefore the mass of dimethylammonium chloride required = 362*2.5 = 905 gm

Thus, the masses of dimethylamine and dimethylammonium chloride we need to prepare 8. 00 l of pH = 12. 00 buffer is 905 gm.

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Based on the molecular structure of water and the physical state that water exists in at different temperatures, the molecular sketch that is correct is sketch A which is the solid state.

The correct option i

Solid, liquid, and gaseous are the three main physical states in which water can exist. Water can be found as ice or snow in a solid state. Water exists as steam or water vapor in the gaseous state.

In solids, the molecules of water are arranged in a fixed crystalline pattern.

In liquids, the molecules of water are free to move about but within a given limit by intermolecular forces.

As gases, the molecule is not held back by any intermolecular forces.

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1) Diesel has a higher viscosity than petrol.

2) Petrol is more flammable than diesel.

3) The formula will be C₁₀H₂₂.

4) The equation is; 2C8H18+25O2→16CO2+18H2O.

Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.

Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.

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Answer:

Judging physically the amount of carbon iv oxide in air is enormously and unequally generated daily

Explanation:

There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. Therefore, as carbon dioxide is not a polluting gas, it cannot be shown easily on the pie chart or bar chart on the right.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds. The melting and boiling points are higher in ionic compounds.

Carbon dioxide is not a polluting gas. Rather it is a harmful gas which adds to the greenhouse effect. Since it cannot be called as a pollutant, it cannot be shown easily on the pie chart or bar chart on the right.

Therefore, as carbon dioxide is not a polluting gas, it cannot be shown easily on the pie chart or bar chart on the right.

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Acid-fast cell walls have a high content of lipids, including a waxy substance called mycolic acid.

The cell wall is composed of pectin when it is young, and when it matures it is formed from cellulose which is rigid. Cell walls are generally found in plants, but in the bacterium Myobacterium tuberculosis that causes tuberculosis, cell walls are also found.

Myobacterium tuberculosis has a wall composed of fat, polysaccharides and mycolic acid. Mycolic acid is a long-chain fatty acid linked to arabinogalactan by glycolipid bonds and peptidoglycan by phosphodiester bridges. The complex cell wall structure of these bacteria causes acid resistance.

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The field of chemistry that explains why bromine trifluoride reacts differently than water vapor during a reaction is called chemical kinetics.

What is Energy?

Energy is a fundamental concept in physics, often defined as the ability to do work. It can take many different forms, including thermal energy, kinetic energy, potential energy, electromagnetic radiation, and chemical energy, among others. Energy can be transferred from one system to another, and it can also be converted from one form to another. The SI unit of energy is the joule (J), although other units such as the calorie and the electronvolt are also used in specific contexts.

The field of chemistry that explains why bromine trifluoride reacts differently than water vapor during a reaction is called reaction kinetics. Reaction kinetics is the study of how fast chemical reactions occur and what factors affect the reaction rate. It takes into account factors such as the nature of the reactants, concentration, temperature, surface area, and the presence of a catalyst or inhibitor.

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The required volume of sample of neon occupy at these conditions of temperature and pressure is 25.2L.

Mass (W) in grams of helium gas will be converted into moles (n) by using the below equation:

n = W/M, where

M = molar mass = 4g/mol

n = 12g / 4g/mol = 3 mol

n = 24g / 4g/mol = 6 mol

And for this question as pressure and temperature for both the conditions is constant so ideal gas equation becomes:

V₁/n₁ = V₂/n₂, where

V₁ = initial volume = 12.6 L

n₁ = initial moles = 3 mol

V₂ = final volume = ?

n₂ = final moles = 6 mol

On putting these values, we get

V₂ = (12.6)(6) / (3) = 25.2 L

Hence required volume of neon gas is 25.2 L.

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The safety feature aimed at keeping nuclear radiation contained is steel-reinforced concrete.

A nuclear power plant is a building with reactors that contain controlled nuclear reactions to produce energy.

Nuclear power plants are able to generate warm water by using atomic properties of matter  (i.e.,m the process of nuclear fission), which is in turn converted into steam to move turbines.

The walls of nuclear power reactors are composed of steel-reinforced concrete in order to avoid radiation release.

In conclusion, the safety standard property that maintains nuclear radiation contained is steel-reinforced concrete.

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Answer:

Lyric

Explanation:

My best guess

Answer:

The enthalpy change (in kJ) if 0.812 mol B reacts with excess A is +202.3 kJ. This can be calculated by first determining the number of moles of A that are needed to react with 0.812 mol B. Since the mole ratio of A to B is 2 : 3, the number of moles of A needed is 0.812 mol B x (2/3) = 0.5413 mol A. Then, the enthalpy change can be calculated as 0.5413 mol A x (254.3 kJ/2 mol A) = 202.3 kJ.

The given question is incomplete, the complete question is:

A 10.0 L tank at 28.6 C is filled with 5.67 g of sulfur tetrafluoride gas and 4.66 g of carbon monoxide gas. You can assume both gases behave as ideal gases under these conditions. Calculate the total pressure in the tank. Round each of your answers to 3 significant digits.

Answer:

The correct answer is 0.541 atm.

Explanation:

Based on the given information, 5.67 grams of sulfur tetrafluoride gas and 4.66 grams of CO gas is filled in the tank having the capacity of 10 liters at 28.6 degree C or 273 + 28.6 = 301.6 K. The no. of moles can be determined by using the formula, n = weight/molecular mass.  

The moles of sulfur tetrafluoride = 5.67 grams / 108 gram per mole (The molecular mass of SF4 is 108 g/mol)

= 0.0525 moles

Similarly the moles of CO = 4.66 grams / 28 gram per mole (The molecular mass of CO is 28 g/mol)

= 0.166 moles

The sum of the moles = 0.0525 + 0.166 = 0.2185 moles

The total pressure can be calculated by using the formula,  

P = nRT/V

Here n is 0.2185 moles, R is 0.0821 L.atm/mol.K, T is 301.6 K and V is 10 Liters. Now putting the values we get,  

P = 0.2185 moles * 0.0821 L.atm/mol.K * 301.6 K / 10 L

P = 0.541 atm

Answer:

2.16 M

Explanation:

The molarity of the solution is 2.16 M. To calculate the molarity, you need to first determine the number of moles: 29.4 grams of NaCl is equal to 0.737 moles. Then, divide the number of moles, 0.737, by the volume of the solution, which is 250 mL. Multiplying the result by 1000 gives the molarity, which is 2.16 M.

yw

Molecules and the moles can be interconverted into each other with the help of the Avogadro's number. In 8.5 x 10⁻² moles of hydrogen fluoride, there are 51.17 × 10²¹ molecules.

Avogadro's number is the special number that converts the moles into molecules and vice versa. The value of the Avogadro's number is 6.02 x 10²³.

If 1 mole of HF has 6.02 x 10²³ molecules then,

8.5 x 10⁻² moles of HF will have:

(8.5 x 10⁻²) × 6.02 x 10²³) = 51.17 × 10²¹

Therefore, 51.17 × 10²¹ molecules are present in HF.

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Answer:

Chemical standard state

a. Temperature is 25C

b. Initial concentration of reactants and products is 1M

Biochemical standard state

a. Temperature is 25C

b. Initial concentration of reactants and products is 1M

Explanation:

The standard state is the reference state of a material which can be used to calculate its properties under other nonstandard conditions.

The biochemical standard state include;

a. Temperature is 25C

b. Initial concentration of reactants and products is 1M

Similarly, the chemical standard state include;

a. Temperature is 25C

b. Initial concentration of reactants and products is 1M

Hence the answer.

Answer:

Here are a few more examples:

Smoke and fog (Smog)

Dirt and water (Mud)

Sand, water and gravel (Cement)

Water and salt (Sea water)

Potassium nitrate, sulfur, and carbon (Gunpowder)

Oxygen and water (Sea foam)

Petroleum, hydrocarbons, and fuel additives (Gasoline)

Heterogeneous mixtures possess different properties and compositions in various parts i.e. the properties are not uniform throughout the mixture.

Examples of Heterogeneous mixtures – air, oil, and water, etc.

Examples of Homogeneous mixtures – alloys, salt, and water, alcohol in water, etc.

Explanation:

Answer:

smog,mud, cement?

Explanation:

Smoke and fog (Smog)

Dirt and water (Mud)

Sand, water and gravel (Cement)

The types of intermolecular bonds in the given compounds are:

NH₃ has a higher vapor pressure because of the extra hydrogen bonding present.

Intermolecular bonds are bonds that exist between the molecules of a substance.

The types of intermolecular bonds that exist between molecules of covalent compounds include:

The higher the number of intermolecular bonds, the higher will be the vapor pressure of a compound.

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Answer

1.06 mol

Explanation

A beaker contains 0.53 mol of potassium bromide in 648.9 mL of water

An additional 648.9 mL of water is added implies the volume of the water will become (648+648)mL = 1297.8 mL

Therefore, the number of moles of potassium bromide in 1297.8 mL will be:

There are 5.79 x 10²¹ representative particles in 2.62g of the molecular compound.

Determine the number of moles of the molecular compound.

We can use the formula:

moles = mass / molar mass

where mass is 2.62g and molar mass is 273g/mol.

moles = 2.62g / 273g/mol

moles = 0.00961 mol

Use Avogadro's number to convert from moles to representative particles.

We can use the formula:

representative particles = moles x Avogadro's number

where Avogadro's number is 6.022 x 10²³.

representative particles = 0.00961 mol x 6.022 x 10²³

representative particles = 5.79 x 10²¹

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Option D; Any pair of aldehyde or ketone reactants where one of the reactants has no alfa-hydrogens will lead to a single aldol product.

Aldehydes are carbonyl compounds that are produced both naturally and artificially and are present everywhere in the environment. Aldehydes are reactive species, therefore naturally, they are hazardous to the body. Any member of the family of organic compounds known as an aldehyde contains a carbon atom that also shares a single bond with a hydrogen atom, a double bond with an oxygen atom, and a double bond with another atom or group of atoms (designated R in general chemical formulas and structure diagrams). All aldehydes have what is known as the carbonyl group, a double bond between carbon and oxygen. Many aldehydes have pleasant aromas, and in theory, they are created by dehydrogenating (removing hydrogen) alcohols, which is how the word "aldehyde" originated.

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Explanation:

Force=mass *acceleration

F=300*5

f

F=1500N

The sample of air should be heated to 252 Kelvin (K) to increase its volume by 25%.

It is possible to determine the temperature to which the sample of air should be heated by using the concept of the ideal gas law. PV = nRT is the ideal gas law, and it relates the pressure (P), volume (V), number of moles (n), temperature (T), and gas constant (R). we can focus on the relationship between volume and temperature since the number of moles and pressure are assumed to be constant.

By showing the increase in volume as a percentage (25%), we can make the equation (V+0.25V)/T = V/T, where V represents the initial volume of the air.

On making the equation simple, we find  Tfinal / Tinitial = 1.25.

To solve for Tfianal, the final temperature,

Tfinal = Tinitail / 1.25

On substituting the initial temperature value of 315K into the equation, we will be getting;

Tfinal = 315K / 1.25

Tfinal = 252K

Hence, the sample of air should be heated to 252 Kelvin (K) in order to increase its volume by 25%.

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The nucleus of an atom is positively charged and contains most of the mass if the atom.

An atom is the smallest particle of a an element that can take part in a chemical reaction.

Atoms are made up of other smaller sub-particles which are:

The protons and neutrons are found in the nucleus of an atom

The electrons are found regions around the nucleus.

Due to the positive charge of the protons, the nucleus of an atom are positively charged and is massive.

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Answer:

Millimeter can be used to describe the width of a small piece of metal

Explanation:

The most appropriate unit to describe the width of a small piece of metal would be millimeters (mm). Millimeters are commonly used to measure small lengths or dimensions, such as the width of objects. This unit provides a precise and accurate measurement for small-scale items.

Ounces (oz) are typically used to measure weight or volume and may not be suitable for describing the width of an object.

Moles (mol) are used in chemistry to quantify the amount of a substance, so it is not relevant for measuring dimensions.

Milliliters (ml) are used to measure volume, specifically the capacity of liquids, and are not typically used to describe the width of a solid object.

Therefore, when discussing the width of a small piece of metal, millimeters (mm) would be the appropriate unit as it specifically measures small lengths or dimensions.

AI said C. Millimeter.

I hope this helped! :)

Answer: We must first compute the quantity of H2O that can result from the reaction of AL(CH)3 and H2SO4 in order to determine the mass of H2O produced.

Explanation:

Let's begin by formulating the reaction's balanced chemical equation:

Al2(SO4)3 + 6 H2O + 2 CH4 = 2 AL(CH)3 + 3 H2SO4

According to the equation, 2 moles of AL(CH)3 and 3 moles of H2SO4 combine to form 6 moles of H2O.

1.75 g of AL(CH)3 is equal to: 1.75 g / 78.0 g/mol = 0.0224 mol of AL(CH)3 as 1 mole of AL(CH)3 has a molar mass of roughly 78.0 g/mol.

2.00 g of H2SO4 is equal to: 2.00 g / 98.1 g/mol = 0.0204 mol of H2SO4 as 1 mole of H2SO4 has a molar mass of roughly 98.1 g/mol.

In order to calculate the amount of H2O produced, we must now identify the limiting reagent.

We contrast the moles of AL(CH)3 and H2SO4 in use. AL(CH)3 and H2SO4 have a stoichiometric ratio of 2 to 3. As a result, 3 moles of H2SO4 are required for every 2 moles of AL(CH).

The equation states that 2 moles of AL(CH)3 will yield 6 moles of water. Therefore, we can calculate the moles of H2O created for 0.0224 mol of AL(CH)3 as follows: 0.0224 mol AL(CH)3 (6 mol H2O / 2 mol AL(CH)3) = 0.0672 mol H2O

Finally, we may use the molar mass of H2O to convert its moles to grams. H2O has a molar mass of about 18.0 g/mol:

18.0 g/mol x 0.0672 mol H2O = 1.21 g H2O

As a result, the mass of H2O generated is roughly 1.21 grams if H2SO4 is the limiting reagent.

Answer:

146.85 g/mol

Explanation:

PV=nRT

n=mass/molar mass

covert from mmhg to atm = 0.184 atm

convert from ml to L= 0.108 L

convert from degree C to K= 456.15 K

convert from mg to g= 0.07796g

then rearrange the formula:

n=PV/RT

=(0.184)(0.108)/(0.08206)(456.15)

n= 5.308*10^(-4)

rearrange the n formula interms of molar mass:

Molar mass= mass/n

=0.07796/(5.308*10^-4)

molar mass= 146.85g/mol

Answer:

Molar mass = 20 g/mol

Explanation:

Given data:

Volume of gas = 108 mL

Mass of gas = 77.96 mg (77.96/1000 = 0.08 g)

Pressure of gas = 1140 mmHg

Temperature of gas = 183°C

Molar mass of gas = ?

Solution:

First of all we will calculate the number of moles of gas.

PV = nRT

R = general gas constant = 0.0821 atm.L/ mol.K

Now we will convert the units and then we will put the values in formula.

Volume of gas = 108 mL× 1 L/1000 mL= 0.108 L

Pressure of gas = 1140 mmHg× 1 atm / 760 mmHg = 1.5 atm

Temperature of gas = 183+273 = 456 K

PV = nRT

1.5 atm ×0.108 L = n × 0.0821 atm.L/ mol.K ×456 K

0.162 atm.L =  n ×37.44 atm.L/ mol

n = 0.162 atm.L/37.44 atm.L/ mol

n = 0.004 mol

Molar mass of gas:

Number of moles = mass/molar mass

0.004 mol = 0.08 g / molar mass

Molar mass = 0.08 g /0.004 mol

Molar mass = 20 g/mol

Answer:

The final volume in mL is 7.14 mL or 7.1 mL.

Explanation:

1.Use Boyle's Law(\(P_{1} V_{1}= P_{2} V_{2}\)). Re-arrange to solve for \(V_{2}\) for the final volume.

2. Plug in values. \(V_{2} =\frac{(2.7 atm)(4.5 mL)}{(1.7 atm)} = 7.14 mL\)