Substances that are good conductors of heat and electricity at room temperature usually
have delocalized electrons moving freely from atom to atom. Which type of bonding
occurs in these substances?
O covalent
electric
ionic
metallic
ASAP PLEASEE

Answer:

1) increases

2)increases

3) Decreases

4) increases

5) increase

6) decreases

Explanation:

Let us remember that in a solid, the molecules of the substance are trapped in fixed positions hence the entropy of a solid is less than that of liquid as well as less than the entropy of a gas.

Reaction (1) and (2) deal with a change of state from solid to liquid or gas leading to increase in entropy.

In reaction (3) the aqueous reactants convert into a liquid product leading to a decreases in entropy.

Reaction (4) and (5) has to do with change of a solid to a gas as well as an increase in volume leading to an increase in temperature.

For reaction(6), a solid is formed so entropy decreases

Answer:

a

Explanation:

Answer:

C6H12O6 the third choice

According to the given information , the molecular formula or the chemical formula of glucose is C₆H₁₂O₆.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

There are four types of chemical formula:

1)empirical formula

2) structural formula

3)condensed formula

4)molecular formula

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Answer:

2.138 x 10^26 atoms Na

Explanation:

atoms Na = 355 mol Na x (6.022 x 10^23 atoms Na/1 mol Na) = 2137.81 x 10^23 atoms Na = 2.138 x 10^26 atoms Na

Answer:

The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion.

Answer:

Al2o3 grams to moles

Explanation:

You can view more details on each measurement unit: molecular weight of Al2O3 or grams This compound is also known as Aluminium Oxide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Al2O3, or 101.961276 grams.

d) 0.

5 out of 8 would be paired already because it has 5 electrons, then the other 3 would be filled by the 3 hydrogens.

Answer:

they are bacteria

Explanation:

Answer:

Good bacteria keeps you healthy by supporting your immune function and controlling inflammation. Certain types of good bacteria can also: Help your body digest food. Keep bad bacteria from getting out of control and making you sick.

Explanation:

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Answer:

5.4

Explanation:

V1=5.0

T1=25+ 273=298

V2= z(unknown)

T2=5+273=278

V1/T1 =V2/T2

V2=V1T2/T1

=5*298/278

=5.4

Answer:

[;

Explanation:

Mudflows (geosphere) and flooding may occur downstream from volcanoes and may inundate streamside communities (biosphere).

Answer:

we need to see the diagram

Explanation:

Explanation:

1 mol of an atom (irregardless of the element) contains the Avogadro's number of atoms. This is given as;

1 mol = 6.022 * 10^23 atoms

For a neutral atom;

NUmber of protons = Number of electrons

The relationship between proton and neutron is given as;

Mass Number = Protons + Neutrons

Ag-108

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 47

Electrons = 47

Neutrons = Mass Number - Protons = 108 - 47 = 61

Pt-195

Atoms =  6.022 * 10^23 atoms

Protons = Atomic Number = 78

Electrons = 78

Neutrons = Mass Number - Protons = 195 - 78 = 117

Answer:

B. Germanium

Explanation:

Since the carbon group element consists of carbon, germanium, etc. Germanium is in the same group as carbon.

Answer:

pop, emotional, heart touching, freestyle and rap music is what I LOVE!!!!!

Answer:

166,600J

Explanation:

Kinetic energy (K.E), which is the energy due to motion of a body, can be calculated by using the formula;

K.E = 1/2 × m × v²

Where;

K.E = kinetic energy (joules)

m = mass of body (kg)

v = speed or velocity (m/s)

According to this question, the mass of the roller coaster is 833.0 kg while its velocity/speed is 20.0m/s.

K.E = 1/2 × 833 × 20²

K.E = 1/2 × 833 × 400

K.E = 1/2 × 333200

K.E = 166,600

Therefore, the kinetic energy of the roller coaster car is 166,600J.

Answer:

Both similes and metaphors are a poetic device because authors can be seen using them while writing their poem to give the reader a deeper understanding of the character and the setting. Metaphor is a figure of speech that talks about one this but refers to another. On the other hand, a simile is a figure of speech that compares two things together. Usually using the work "like" or "as".

Hoped it helped! Have a great day!

Answer:

12.5

1.95x10^-10

1.5

0.5

in that order

Explanation:

The answer is gold.

Substance: Specific Heat (C) in joules per gram/degrees centigrade:

Water (ice) 2.05

Iron 0.46

Aluminium 0.90

Gold 0.13

Copper 0.39

Ammonia (liquid) 4.70

Ethanol 2.44

Gasoline 2.22

Water (liquid) 4.18

Water (vapor) 2.08

Air (25 degrees Celsius) 1.01

Oxygen 0.92

Hydrogen 14.30

To know that we clear the equation q=m*C*Δt for the specific heat (C) and solve the equation. Keep in mind that we need to use the heat (520 J) in Joules since the values from the question and the table are in Joules.

q/m∗ΔT = C = 520J/200g∗(45degC−25degC) =

0.13J/gdegC

As you can see, the substance that has this specific heat is GOLD.

The value of specific heat for the given data in the question will be for gold:-

[tex]C= 0.13\ \dfrac{J}{g^oC}[/tex]

Specific heat can be defined as the amount of heat one kg or gram substance can absorb or release for a unit temperature difference.

The formula for the heat will be:-

[tex]Q=mc\Delta T[/tex]

m= Mass of substance

c= specific heat of the substance

[tex]\Delta T[/tex]= Temperature difference

Now the given data is

m= 200 g

Q= 520 J

[tex]\Delta T[/tex]=  (45-25)=20

[tex]Q=mc\Delta T[/tex]

[tex]520=200\times C\times 20[/tex]

[tex]C= \dfrac{520}{200\times 20} =\dfrac{520}{4000} =0.13\ \dfrac{J}{g ^oC}[/tex]

Since the value of specific gold  is  [tex]0.13\ \dfrac{J}{g ^oC}[/tex]

Thus the value of specific heat for the given data in the question will be for gold:-

[tex]C= 0.13\ \dfrac{J}{g^oC}[/tex]

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Answer:

We use radio waves for communicating or a for television and radio. We use Heat waves to heat things. We uses heat waves everyday for heat up food in the microwave and drying clothing when using the dryer or when drying our hair with a hairdryer. Infrared light is used by electrical heaters, cookers for cooking food, and by infrared cameras which detect people in the dark.

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Answer:

3.11 is the pH of the solution

Explanation:

The ionised form of the acetic acid is the acetate ion. To solve this problem we need to solve H-H equation:

pH = pKa + log [A⁻] / [HA]

Where pH is the pH of the buffer

pKa = -log Ka  = 4.74

[A⁻] = Concentration of acetate ion = 0.002M * 2.3% = 4.6x10⁻⁵M

[HA] = Concentration of acetic acid = 0.002M *(100-2.3)% = 0.001954M

Replacing:

pH = 4.74 + log [4.6x10⁻⁵M] / [0.001954M]

pH = 3.11 is the pH of the solution

Answer:

single displacement

Explanation:

Answer:

C2H2O1

Explanation:

I got it right on plato :>

C2H6O1 is the correct answer.

Answer:

Answer:

Asan po yung choices?

Answer:

A

Explanation:

Answer:

no

Explanation:

Small marble chips reacts faster

The best way for helping the earth water supply that should be last for future generations should be considered option b. where it decrease the residential water usage.

The average American family should be used for more than 300 gallons of the water per day at home. Approximately 70% of the use should arise indoors,

Moreover, outdoor water should be accounted for 30% of household that should be high in drier parts for the country and it should be more water intensive landscape.

Therefore, the option b is correct.

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Answer:

Answer: everything except E

Explanation: There was no dramatic change in temperature and i just took the assignment.

According to the law of conservation of matter, matter cannot be created not be destroyed. In this experiment, no matter loss will occur but there will be rapid evolution hydrogen gas and the balloon will expand.

According to conservation of matter, matter can neither be created nor be destroyed but its state and properties can be changed. The total mass of the reactants will be equal to the total mass of the products.

Magnesium is a second group element and is a metal. Metal reacts with  hydrogen halides to form metal halides and hydrogen gas as the reaction written below:

[tex]Mg +2 HCl \rightarrow MgCl_{2} +H_{2}[/tex]

The evolved hydrogen gas in this reaction tries to diffuses out the sealing and thus the balloon cover expands.  And thus the solid magnesium metal disappears to form magnesium chloride.

The evolution of gases is exothermic and therefore,  the temperature outside increases suddenly.  There we can see bubbles of hydrogen  in the reaction system.

Therefore, the changes that occur in the experiments are, rapid evolution of gases, solid metal disappears, sealing cover expands and there occur a rapid change in temperature. Thus options A,C,D,E are correct.

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