Which of the following statements about matter at
room temperature is true?
a. A solid has a definite volume, but a liquid's
volume can change.
b. Both a solid and a liquid Have a definite shape.
c. A solid has a definite shape, but a liquid's shape
can change.
d. Both a solid and a liquid have volumes that can
change.
e. A solid's shape can change, but a liquid has a
definite shape.

Answer:

An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity, the more an atom or a substituent group attracts electrons.

Explanation:

Hope this helps :)

Answer:

c = 0.79 j/g.K

c = 1 j/g.K

T2 = 123.1 K

Explanation:

1)

Given data:

Mass of metal = 450 g

Heat loses = 34,500 j

Temperature drop = ΔT  = 97 K

Specific heat of metal = ?

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

34500 j = 450 g ×c × 97 K

34500 j = 43650 g.K ×c

c = 34500 j/43650 g.K

c = 0.79 j/g.K

2)

Given data:

Mass of metal = 25 g

Heat loses = 2600 j

Temperature drop = ΔT  = 103 K

Specific heat of metal = ?

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

2600 j = 25 g ×c × 103 K

2600  j = 2575 g.K ×c

c = 2600 j/2575 g.K

c = 1 j/g.K

3)

Given data:

Mass of water = 10 g

Heat absorbed  = 840 j

Initial temperature drop = 298 K

Final temperature = ?

Solution:

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

840 j = 10 g ×4.18 j/g.K × [T2 - 103 K]

840 j = 41.8 J/K ×  [T2 - 103 K]

840 J/41.8 J/ K = T2 - 103 K

20.1 k = T2 - 103 K

T2 = 20.1 K + 103 K

T2 = 123.1 K

Answer:

14. C ,  15. C. 16. B , 17. D They are all right

Explanation:

Answer:

CO

Explanation:

the rest are elements. CO is made up of one carbon atom and one oxygen atom

Answer:

That it is hard to compress

Explanation:

Answer:

Our Sun (a star) and all the planets around it are part of a galaxy known as the Milky Way Galaxy.

The given electronic configuration is that of an element named dysprosium.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Answer:

whats the question, can't help if I don't know the question

Answer:

ob

Explanation:

becoz when volume increases density decreases.

Answer:

Just as interesting as the effects of heat transfer on a system are the methods by which it occurs. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, as through a cooking pan, or slowly, as through the walls of a picnic ice chest. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet every heat transfer takes place by only three methods:

Conduction is heat transfer through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we know that thermal motion of the atoms and molecules occurs at any temperature above absolute zero.) Heat transferred from the burner of a stove through the bottom of a pan to food in the pan is transferred by conduction.

Convection is the heat transfer by the macroscopic movement of a fluid. This type of transfer takes place in a forced-air furnace and in weather systems, for example.

Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of Earth by the Sun. A less obvious example is thermal radiation from the human body.

:)

Further more info...

Conduction:

As  you walk barefoot across the living room carpet in a cold house and then step onto the kitchen tile floor, your feet feel colder on the tile. This result is intriguing, since the carpet and tile floor are both at the same temperature. The different sensation is explained by the different rates of heat transfer: The heat loss is faster for skin in contact with the tiles than with the carpet, so the sensation of cold is more intense.

Convection :

In convection, thermal energy is carried by the large-scale flow of matter. It can be divided into two types. In forced convection, the flow is driven by fans, pumps, and the like. A simple example is a fan that blows air past you in hot surroundings and cools you by replacing the air heated by your body with cooler air. A more complicated example is the cooling system of a typical car, in which a pump moves coolant through the radiator and engine to cool the engine and a fan blows air to cool the radiator.

Radiation :

You can feel the heat transfer from the Sun. The space between Earth and the Sun is largely empty, so the Sun warms us without any possibility of heat transfer by convection or conduction. Similarly, you can sometimes tell that the oven is hot without touching its door or looking inside—it may just warm you as you walk by. In these examples, heat is transferred by radiation. That is, the hot body emits electromagnetic waves that are absorbed by the skin. No medium is required for electromagnetic waves to propagate. Different names are used for electromagnetic waves of different wavelengths: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Answer:

Carbon dioxide - CO.

Benzene - C6H.

Carbon tetrachloride - CCl.

Methane - CH.

Ethylene - C2H.

Explanation: Some examples of atoms with nonpolar convalent bonds. Hope this was found useful!!

Non polar covalent compounds have no net dipole moment due to charge separation. Some examples are, CO₂, H₂, N₂,O₂ etc.

Covalent bonds are formed by the sharing electrons between atoms. Covalent bond is comparatively weaker than ionic bonds. Atoms of deficient number of electrons will combine by sharing their valence electrons and forms covalent bonds.

When one atom has more electronegativity, then the shared pair of electrons will  attracted into the electronegative atom. This creates a charge separation and a dipole moment.

However, if the electronegative atoms are linear in geometry from the central less electronegative atom then the dipole moment cancel each other and the compound become non polar as in the case of CO₂.

All gases in molecular states are covalently bonded and are non polar such as H₂, N₂,O₂ etc.

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Answer:

Is 4 an answer? If so, that is correct

Explanation:

Answer:

Boiling the subtance

Explanation:

To determine the nature of an unknown liquid the first thing you can do is boil it:

* If the sample is water, the boiling point must be near to 100°C

*When all pure water is evaporated, there is no residue, the glass must be empty.

* But if the sample is salt water, when all water is evaporated, you will see a solid white residue that, possibly, is salt.

Answer:

They become fast that they don't touch each other

Explanation:

That's it sorry that I can't help any further

An example of how water is used inside and around the home is brushing teeth before bed. Details about water management can be found below.

Water is a inexhaustible or renewable resource that can be used for domestic and personal purposes.

Water can be used around the home in the following ways:

Therefore, an example of how water is used inside and around the home is brushing teeth before bed.

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Answer:

If atoms gain electrons, they become negative ions, or anions. ... A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -

Explanation:

Answer:

Add and electron and a proton

Explanation:

You would have to add a proton and an electron to F to get it to be Ne

Answer:

The correct approach is Option B (Peer Review).

Explanation:

Other approaches do not apply to the example mentioned. Although the one mentioned is right.

Answer:

peer review

Explanation:

let me guess you're doing Edguity unit test

Answer:

I believe the carts will move towards each other, as positive and negative charges attract each other.

Explanation:

It is like a magnet when you put the opposite sides together. (North and South, South and North) or the plus goes to the minus and the minus goes to the plus.

If you take out the far left and right wedges, it may move a little away for a few seconds, but will move back together .

Another hypothesis is that if the sheets are flimsy, the sheets will attract each other, however, the sheets will join together at the top, but the carts will still stay at the same place.

Answer:

2.76 (full answer) 2.7617e-6

Explanation:

Answer:

The volume of car having density 3 g/mL and mass 75 g is 25 mL.

Explanation:

Given data:

Volume of car = ?

Density of car = 3 g/mL

Mass of car = 75 g

Solution:

The given problem will be solved through density formula.

Density:

Density is equal to the mass of substance divided by its volume.

Formula:

D=m/v

D= density

m=mass

V=volume

Now we will put the values in formula.

3 g/mL = 75 g/ v

v = 75 g/ 3 g/mL

v = 25 mL

The volume of car having density 3 g/mL and mass 75 g is 25 mL.

Answer:

B. more it will warp space

Explanation: