Which of the following elements would be most
likely to be both conductive AND magnetic in nature?
A. F
B. Ni
C. Na
D. Xe

Answer:

There are 22 hydrogen in 2,3,3,5-tetramethylhexane (C10H22)

From the left to the right of the skeletal structure:

1st Main Carbon = 3 hydrogen

2nd Main Carbon = 1 hydrogen

1st Branch Carbon = 3 hydrogen

3rd Main Carbon = 2 hydrogen

2nd Branch Carbon = 3 hydrogen

3rd Branch Carbon = 3 hydrogen

4th Main Carbon = 0 hydrogen

4th Branch Carbon = 3 hydrogen

5th Main Carbon = 1 hydrogen

6th Main Carbon = 3 hydrogen

Total = 22 hydrogen

Explanation:

This is the skeletal formula for 2,3,3,5-tetramethylhexane - the 2D chemical structure. It is an organic compound. The carbon atoms in the structure are known as the carbon backbone. The hydrogen atoms are linked to the carbon backbone. This provides each carbon atom with four bonds.

Answer:

Its either with itself to become fluoride Fl2 or with an alkali metal (elements in group 1) to achieve a stable electronic configuration or octet structure

Explanation:

Answer:

uijj uhh the yuk high uijj john

Answer:

The specific heat of substance is 0.90 j/g.°C.

Explanation:

Given data:

Mass of sample = 341.0 mg (341.0/1000 = 0.341 g)

Initial temperature = 8.4 °C

Final temperature = 21.5 °C

Heat needed = 4.03 J

Specific heat capacity of substance = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT = 21.5 °C - 8.4 °C

ΔT = 13.1 °C

4.03 J = 0.341 g × c ×13.1 °C

4.03 J = 4.4671 g.°C  × c

c = 4.03 J  /4.4671 g.°C

c= 0.90 j/g.°C

The specific heat of substance is 0.90 j/g.°C.

Answer:

Prokaryotes are unicellular organisms that lack membrane-bound structures, the most noteworthy of which is the nucleus. ... While prokaryotic cells do not have membrane-bound structures, they do have distinct cellular regions. In prokaryotic cells, DNA bundles together in a region called the nucleoid.

Answer:

#2, 4, & 5

Explanation:

In number 1 there are unequal Cu's

In number 3 there are unequal Cl's

Answer:

B,D,E

Explanation:

Answer:

Jupiter and Saturn has ammonia clouds in its atmosphere since the molecules of ammonia gas that are present in their atmospheres condense to form clouds. However, these ammonia clouds are more visible in Jupiter than in Saturn because of their lower altitude in Saturn.

Answer:

A

Explanation:

i took the exam

Answer: hope this helps!

Explanation:

Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore,  the enthalpy of reaction is -2219.9KJ/mol and the reaction is exothermic reaction.

Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances.

Mathematically,

C[tex]_3[/tex]H[tex]_8[/tex](g) + 5O[tex]_2[/tex](g) [tex]\rightarrow[/tex]3CO[tex]_2[/tex](g) + 4H[tex]_2[/tex]O(g)

Mathematically, the formula for enthalpy of a reaction can be given as

ΔH for reaction= 3 ×ΔH of CO[tex]_2[/tex] + 4  ×ΔH of H[tex]_2[/tex]O- ΔH of  C[tex]_3[/tex]H[tex]_8[/tex]+ 5 ×ΔH of O[tex]_2[/tex]

                        =  3 ×393.5KJ/mol+ 4  ×285.8- 103.8+ 5 ×0

                        =-2219.9KJ/mol

The  enthalpy of reaction is -2219.9KJ/mol. since the value of enthalpy has negative sign, the reaction is exothermic reaction.

Therefore,  the enthalpy of reaction is -2219.9KJ/mol and the reaction is exothermic reaction.

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Answer:

By Boiling Them soo water can evaporate and separates from salt.

Explanation:

They are indeed placed from the far left hand side of the periodic table in almost the same column. If you step around the table between left to right, the movement of electrons rises by one. When you progress down the line, the number of power increases by the one.

Answer:

The identity of unknown substance is Barium.

Explanation:

The given compound has a formula of MCl2. And the percentage of chlorine in this compound is said to be 34.1 %. But, we know that the mass of chlorine in this compound is, 35.5*2 = 71 g

Therefore, if we let x be the total mass of the compound, then:

34.1% of x = 71 g

(0.341)x = 71 g

x = 71 g/0.341

x = 208.2 g

Hence, the mass of other atom M, must be:

M = x - 71 g

M = 208.2 g - 71 g

M = 137.2 g

Now, we look into periodic table in group II. We find that the element is Barium with atomic mass of 137 g.

The identity of unknown substance is Barium.

Barium forms a metal chloride whose percentage of chlorine is 34.1 %. The unknown substance is barium chloride.

We have a Group II metal chloride with a general formula MCl₂. The molar mass of Cl⁻ is 35.45 g/mol. The mass of 2 moles of Cl⁻ is:

[tex]2 mol Cl^{-} \times \frac{35.45g Cl^{-} }{1mol Cl^{-} } = 70.90g Cl^{-}[/tex]

70.90 g represents 34.1% of 1 mole of MCl₂. The molar mass of MCl₂ is:

[tex]70.90gCl^{-} \times \frac{100gMgCl_2}{34.1gCl^{-} } = 208gMgCl_2[/tex]

208 g of MCl₂ contains 70.90 g of Cl⁻. The mass of M²⁺ in 1 mole of MCl₂ is:

[tex]mMCl_2 = mCl^{-} + mM^{2+} \\\\mM^{2+} = mMCl_2 - mCl^{-} = 208g-70.9 g = 137.1 g[/tex]

Barium has a molar mass of 137.3 g/mol, so M must be barium. The unknown substance is barium chloride.

Barium forms a metal chloride whose percentage of chlorine is 34.1 %. The unknown substance is barium chloride.

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Answer:

the observation point.

Explanation:

after the experiment, you observe the data and comparing and write out formulas for the given data.

Answer:

Atoms are neither created or destroyed.

Explanation:

The end result of a chemical change does not create or destroy any atoms. Matter cannot be created or destroyed, meaning the same amount of atoms exist before and after the change.

Explanation:

CuSO4.5H2O and CaSO4.2H2O

Answer:

CaSO4 is an example of anhydrous compound

Reason:

Calcium Sulphate (CaSO4) does not contain water in its crystal structure, unlike other minerals.

Answer:

The correct appropriate will be Option 1 (Acid anhydrides are less stable than esters so the equilibrium favors the ester product.)

Explanation:

The other options offered are not relevant to something like the scenario presented. So, the solution here is just the right one.

Answer:

It is one of the covalent bonds in which the electrons are shared equally; therefore, dipole moment exists between the atoms in a molecule and there is no charge separation between the atoms in a molecule.

Answer: A covalent bond in which the electrons are shared equally

Explanation:

A P E X

Answer:

The correct answer is "The β-sheet is a type of secondary structure that fulfills the hydrogen bonding requirements of amino acid side chains".

Explanation:

Hydrogen bonding are among the most common chemical bonds that occur between amino acids, where one atom of an amino acid acts as an hydrogen donor and the other acts as hydrogen acceptor. It is not true that β-sheet fulfills the hydrogen bonding requirements of amino acid side chains. β-strands are directional and form hydrogen bonds in antiparallel, parallel, or mixed arrangements. In the parallel form adjacent amino acids do not form hydrogen bonds, but they bond with the residues that flank the other.

The statement related to β-sheet that is considered to be false is that it should be the type of the secondary structure.

It is the bonding that should be arise mainly with the chemical bonds that lies between the amino acids where one atom should be acted as the donor of hydrogen and the other should be like an acceptor of hydrogen. Also, β-strands should be considered as directional and create the hydrogen bonds in the anti-parallel or mixed arrangements.

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Answer:

AWAWDWDAD

Explanation:

Answer:

c. baking soda

Explanation:

Answer:

Both processes produce equal entropy

Explanation:

Three compartments : A , B , C

A to the left, B in center, C on the right

compartment B is filled at 298 k  while A and C is empty

The process that produces more entropy is:  both processes and this is because the system is an isolated system with no heat matter and work exchange with the environment. and also entropy is independent of the path a process follows so either valve been open does not affect the entropy in the system because the change in the internal energy of an isolated system = 0

Answer:

Mg

Explanation:

Electronegativity increase to the right and top of the periodic table. So the element that is the most toward the left and bottom is the least electronegative.

Answer:

Methanol

Explanation:

Answer:

5 electron

It contains 6 electrons in 2p orbital, 6 electrons in 3p orbital and 5 electron in 4p orbital.

Answer:

[tex]P=5.8x10^2kPa[/tex]

Explanation:

Hello.

In this case, since chlorine gas is assumed to behave ideally, we can use the ideal gas equation in order to compute the required pressure:

[tex]PV=nRT[/tex]

In such a way, since the temperature must be in kelvins and the volume in liters for the universal gas constant:

[tex]T=5+273.15=278.15K\\\\V=8dm^3*\frac{1L}{1dm^3}=8L[/tex]

Thus, we first compute the pressure in atm:

[tex]P=\frac{nRT}{V}= \frac{2mol*0.082\frac{atm*L}{mol*K}*278.15K}{8L}\\\\P=5.7atm[/tex]

Thus, the pressure in kPa turns out:

[tex]P=5.7atm*\frac{101.325kPa}{1atm}\\\\P=5.8x10^2kPa[/tex]

Answer:

1.9472857e+56

Explanation: Ask Google

0.160 mols can be found in 50.0mL of 3.20M solution

Answer:

A

Explanation: