What size volumetric flask would you use to create a 0.50 M
solution using 10.00 g of CaBr2

The increasing order of the crystal field splitting- I− < Br− < S2− < SCN− < Cl−< N3 < F−< NCO−< OH−<C2O42−< O2−< H2O < acac− < NCS− < CH3CN <gly <py < NH3 < en  < bipy  < phen  < NO2−  < PPh3 < CN− < CO.

The ligands (affections to a metal ion) are listed in the spectrochemical series according to the strength of their field. The series was created by superimposing various sequences acquired from spectroscopic research because it is impossible to generate the full series by examining complexes with the single metal ion.

The ligands cyanide and CO are classified as strong-field ligands, whereas the halides are weak-field ligands. Ligands such as water and ammonia are said to create medium field effects.

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Answer:

Option D

Explanation:

The switch safely opens and closes the circuit

samarium-147 decays to neodymium-143 in one step, but requires careful analysis; however, it can give the most accurate dates for Meteorites and lunar works. Smarium and neodymium are rare earth metals, and their isotopes can be used in rock dating.

meteorite is a tiny sliver of geographic matter which drops to the the planet's surface. The Asteroid Belt is responsible for the vast majority of meteorites that strike Earth. Witness as a large meteor travels to Ground, induces a detonation, as well as generates an impact. Isotopes are multiple or even more different kinds of atoms that share the same number of protons and placement in the periodic table, and that vary in nucleon figures because they have different figures of neutrons in their nuclei This can be completed by trying to fire high-speed particles into to the nucleus of an atom.

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The body fat of humans can be measured by the density in grams per mL. The volume of the fat with a density of 0.94 g/mL and mass of 5.2 lb is 2.50 L.

The volume is the factor of the dimension that inversely affects the density of the substance. The volume is given by the division of the mass by the density. It can be given in mL or cubic centimeters.

Given,

Mass of body fat = 5.2 lb

Density of human fat = 0.94 g/mL

At first, mass is converted from lb to grams as:

1 lb = 453.592 grams

So, 5.2 lb = 2358.68 grams

Secondly, volume is calculated as:

Volume = Mass ÷ density

V = 2358.68 grams ÷ 0.94 g/mL

= 2509.23 mL

Thirdly, volume from ml is converted to L as:

1 mL = 0.001 L

2509.23 mL = 2.50 L

Therefore, 2.50 liters of body fat has to be removed from the body.

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Answer:

2, 19, 12 and 14 are the coefficients.

Answer: D

Explanation:

Radiation from gamma decay has the most energy and the correct option is option D.

To become more stable, the nuclei undergo radioactive decay. In this process, the nuclei give off energy and may also emit charged particles of matter.

Types of radioactive decay include alpha, beta, and gamma decay. In alpha and beta decay, both particles and energy are emitted. In gamma decay, only energy, in the form of gamma rays, is emitted.

In the gamma decay, a nucleus changes from a higher energy state to a lower energy state through the emission of electromagnetic radiation.

Therefore, Radiation from gamma decay has the most energy and the correct option is option D.

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Answer:

69.23g

Explanation:

Find out how many moles is in 9.89g of H2.

number of moles = mass(g) / molar mass

1 is the molar mass of hydrogen (to the nearest whole)

relative molecular mass of H2: 2*1 = 2

number of moles of H2 = 9.89/2 = 4.945

1 mol of H2 is produced from 2 mol of Li

so

4.945 mol of H2 produces 9.89 mol of Li

mass(g) = number of moles * molar mass

7 is the molar mass of Lithium (to the nearest whole)

mass = 9.89 * 7 = 69.23

69.23 grams of Li are needed to produce 9.89 of H2

Answer:

See explanation and image attached

Explanation:

Alkenes undergo hydrogenation to give the corresponding alkanes. Where the structure of the original alkene is unknown, we can deduce the structure of the alkene from the structure of the products obtained when it undergoes various chemical reactions.

Now, the fact that we obtained 2-methylhexane upon hydrogenation and the two compounds had different heats of hydrogenation means that the two compounds were geometric isomers. The original compounds must have been cis-2-methyl-3-hexene and trans-2-methyl-3-hexene.

When reacted with HCl, the same compound C7H15Cl is formed because the stereo chemistry is removed.

However, we know that the trans isomer is more stable than the cis isomer hence the cis isomer always has a higher heat of hydrogenation than the trans isomer. Thus X is cis-2-methyl-3-hexene.

The characteristics of the conservation of energy and momentum allow to find the result for the movement of the balls, the correct answer is:

      D. The mechanical energy of the ball on the left is transferred through

the other balls to the ball on the right.

Mechanical energy is the sum of the kinetic energy and the potential energies. In the case that there is no friction, the mechanical energy is conserved.

The momentum is defined by the product of the mass and the velocity of the body, in an isolated system the momentum is conserved and the shocks can be of two types:

In the case indicated, when removing the ball, it gains a height, therefore if the initial mechanical energy is

          Em₀ = mgh

When it reaches the lowest point, just before it hits the ball its energy is:

           \(Em_f\) = 1 / 2m v²

          Em₀ = Em_f

          v = \(\sqrt{2gh}\)  

collides with the other ball and transfers its momentum in an elastic collision, the balls do not stick, as all the energy of the ball is kinetic, this energy is transferred to each ball until it reaches the last one, where the kinetic energy is transformed into potential energy a increases its height.

Let's analyze the answers:

A. False. This is a collision of particles there are no waves.

B. False. At the lowest point the ball on the left has kinetic energy.

C. False. It is a collision of particles, there are no waves.

D. True. The energy from the elastic collisions is transferred through each ball until it reaches the last ball.

In conclusion, using the characteristics of the conservation of energy and momentum, we can find the result for the movement of the balls, the correct answer is:

      D.  The mechanical energy of the ball on the left is transferred through the other balls to the ball on the right

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\(CO_{2}\)The following compounds' mole fractions (X) are (a)0.986 (b)0.750 (c)0.811 for the given solutions.

\(H_{2}SO_{4}\) mass is 19.4 g.

\(H_{2}SO_{4}\)'s molecular weight is 98.08 g/mol.

It's molecular weight is 19.4 g/98.08 g/mol, or 0.1979 mol.

Density times volume is 1.00 g/mL times 0.251 L and 251 g for water mass.

\(H_{2} O\) has a molecular weight of 18.02 g/mol.

Water moles are equal to 251 g / 18.02 g/mol, or 13.93 mol.

The solution's total moles are equal to 0.1979 mol plus 13.93 mol, or 14.13 mol.

Sulphuric Acid's mole fraction is equal to 0.1979 mol/14.13 mol, or 0.014.

Water mole fraction is equal to 13.93 mol / 14.13 mol, or 0.986 mol.

KBr's mass is 35.7 g.

KBr has a molecular weight of 119 g/mol.

The formula for KBr is 35.7 g/119 g/mol, which equals 0.300 mol.

16.2 g of water in mass

Water has a molecular weight of 18.02 g/mol.

Water moles are equal to 16.2 g / 18.02 g/mol, or 0.899 mol.

The solution has a total of 1.199 moles (0.300 mol + 0.899 mol).

The mole fraction of KBr is equal to 0.300 mol/1.199 mol, or 0.250

Water mole fraction is equal to 0.899 mol / 1.199 mol, or 0.750 moles.

\(CO_{2}\) mass = 233 g

It has a molecular weight of 44.01 g/mol.

Its moles are equal to 233 g / 44.01 g/mol, or 5.291 mol.

Water volume equals 0.409 L.

Water has a molecular weight of 18.02 g/mol.

(density × volume) / molecular weight (1.00 g/mL 409 mL) / 18.02 g/mol = 22.71 mol = number of moles of water

The solution's total moles are equal to 5.291 mol plus 22.71 mol, or 28.00 mol.

\(CO_{2}\) mole fraction = 5.291 moles / 28.00 moles = 0.189

\(H_{2} O\) mole fraction is 22.71 mol/28.00 mol, or 0.811 moles.

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Answer:

ΔE = q + w

here q = -136 kj

w = 146

so  ΔE = -136 + 146 = 10 kj

thus internal energy of system increases by 10 kj...

I hope this helps! :) I don't know if it's the right one

E. The  oxidation number of chlorine with 14 electron is written as 17, 37 CL⁺³.

Oxidation number of an atom/ion is the number of electrons an atom/ion that the molecule has either gained or lost compared to the neutral atom.

Chlorine is a non metal with atomic number of 17 (17 electron, and 17 proton).

Chlorine also has an oxidation number of -1.

When the number of electron of the chlorine has been reduced to 14, it implies that the chlorine ion has been reduced by losing 3 electrons.

The oxidation number of chlorine with 14 electron is written as follows;

= CL (14) = 17 CL⁺³

mass number = 17 + 20 = 37

= 17, 37 CL⁺³

Thus, the  oxidation number of chlorine with 14 electron is written as 17, 37 CL⁺³.

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Answer:

Kinetic energy is the energy by ethicalness of article's movement while Thermal energy is the inner energy of an item because of the motor energy of its particles.

Explanation:

Answer:

Thermal energy:

Thermal energy is a type of energy that is formed by the vibration of atoms and molecules inside matter. The faster they vibrate, the more energy they contain. They also gain more heat.

Kinetic energy:

Kinetic energy is the mass/energy that is in moving objects. When an object speeds up, it gains more kinetic energy. All moving objects contain kinetic energy. The moving object gains energy due to its motion.

Note:

Sorry if this is a bad explanation but hopefully this helped!

Answer:

Solution given:

1:

1 mole of aluminum =26.98 gram

8 mole =26.98*8=215.84 gram

8.00 moles of aluminum =215.84grams.

2:

1 mole of aluminum chloride =133.34 grams

10.5 moles of aluminum chloride =133.34*10.5=1400.07 grams

10.5 moles of aluminum chloride =1400 grams.

#1

1mol.of Al=27g

8mol of Al=27(8)=216g

#2

Molar mass of AlCl3=133.5g/mol

1 mol of AlCl3=133.5g

10.5mol.of AlCl3=10.5(133.5)=1401.75g

Answer:

it is a bit hard question but i'll try to answer it

Explanation:

1) It has a lower freezing point (-39°C) and a high boiling point (35°C). ...

2) It is shiny liquid metal, hence can be easily seen through the glass of the thermometer tube.

3) It has a fairly large expansion for a small change in temperature.

4) It does not stick to the glass tube.

hope it helps you

Answer:

its 1.04

Explanation:

Answer:

The answer would be cation

Explanation:

Answer:

it's an anion

if it has more electrons than protons, then it has a negative net charge making it an anion

To solve this problem we need to know first how many mols of water we have. To do that we use the Ideal gas law with the that provided:

according to the chemical equation we know that 3 mols of water react with 2 mols of iron, we can use this information as a conversion factor to know how many mols of iron react with 1.166 mols of water:

and last we have to convert those mols into mass. To do that we use the molar mass of Iron 55.845g/mol:

the mas of Iron is 43.939g

Answer:

C

Explanation:

thts the right answwer im sure

Answer:

C

Explanation:

They take in carbon dioxide and make an oxygen. That's why they are encouraging people to plant. Less CO2 more oxygen

Answer:

Particles of The Same Composition

Answer:

Volume of a rectangular box= length × width × height

Volume = 1.0 ft

height = 1.5ft

width = 1.0ft

length = ?

1= 1×1.5 × l

l= 1/1.5

l = 0.667ft

length = 0.667ft

Hope this helps

Answer:

L =.67 ft

Explanation:

To find the length we can use the volume of a rectangle equation:

\(Volume = length*width*height\)

Given:

V = 1.0 ft

W = 1.5 ft

H = 1.5 ft

Find:

Length

We can rearrange the equation above to look like this:

\(\frac{V}{WH} = L\)

Then plug in the numbers

\(\frac{1.0ft}{(1.0ft)(1.5ft)} = L\)

Solve

\(L = .67ft\)

Answer:

pH = 5.76

Explanation:

We can solve this problem by using Henderson-Hasselbach's equation:

pH = pKa + log\(\frac{[SodiumAcetate]}{[AceticAcid]}\)

We are already know all the required information, thus we input the data given by the problem:

pH = 4.76 + log(20/2)

And finally calculate the pH:

pH = 5.76

The pH of that acetic acid solution is 5.76.

Answer: e. 4.8 h

Explanation:

Expression for rate law for first order kinetics is given by:

\(t=\frac{2.303}{k}\log\frac{a}{a-x}\)

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant  

a - x = amount left after decay process  

a) for rate constant

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

\(t_{\frac{1}{2}}=\frac{0.693}{k}\)

\(k=\frac{0.693}{0.77hr}=0.9hr^{-1}\)

b) for 160.0 g to decay to 2.07 g

\(t=\frac{2.303}{0.9}\log\frac{160.0}{2.07}\)

\(t=4.8hr\)

The time  required for a 160.0-g sample of 158Eu to decay to 2.07 g is 4.8 hours

Answer:

182.156g

Explanation:

grams = 49/.269 = 182.156g needed

Answer:

I think it's streak and cleavage.

Explanation:

I'm not the smartest so sorry if it's wrong.

The structure of fatty acids involves long carbon-based chains with a carboxyl group (―COOH) located in the end, triglycerides phospholipids contain a phosphate group and glycerol, while steroids are cyclic and they contain C atoms linked via 4 fused rings.

Lipids are a broad category of biomolecules that include fatty acids, triglycerides phospholipids, and steroids. For example, fatty acids are long carbonated chains that contain exactly identical CH2 groups in the interior of the molecule and a carboxyl group (―COOH) located at one extreme side.

Triglycerides phospholipids are composed of three fatty acids chains linked to a glycerol backbone and also a phosphate group that may confer polar properties to the molecule.

Finally, steroids are another important class of lipids composed of several carbon-based fused rings.

Therefore, we can conclude that fatty acids, triglycerides phospholipids, and steroids are structurally different lipids that are mainly composed of carbon-based structures.

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