what is meant by polimer​

Answer:

Igneous rock to metamorphic rock

Metamorphic rock to igneous rock

Sedimentary rock to metamorphic rock

Explanation:

In changing a rock through the listed processes heat is highly required.

Transformation from a rock to igneous rocks requires the most heat because the rock body must be molten.

Answer:

its true methane is used as a fuel gas

Explanation:

1. LDFs

2. Intermolecular Forces

3. Intramolecular Forces

4. Linear

5. Tetrahedral

Edit: I'm new to this site and idk how to use it properly. I'm not sure about 2 and 3 currently because these forces are between molecules as well so INTERmolecular would be used twice (?)

Answer:

latent heat of condensation will have the same absolute value as the latent heat of vaporization. The latent heat of condensation will be negative. The latent heat of condensation is a characteristic property that can be used to identify a substance.

Explanation:

Answer:

energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.

Explanation:

Answer:

The actual reason that the application of salt causes ice to melt is that a solution of water and dissolved salt has a lower freezing point than pure water. When added to ice, salt first dissolves in the film of liquid water that is always present on the surface, thereby lowering its freezing point below the ices temperature. Ice in contact with salty water therefore melts, creating more liquid water, which dissolves more salt, thereby causing more ice to melt, and so on.

Answer:

Veins

Explanation:

Veins, which usually look blue, return blood to the heart.

Answer:

B) we will convert the 10 g of NaCl into moles.

Explanation:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

we will convert the 10 g of NaCl into moles.

Number of moles of NaCl:

Number of moles = mass/molar mass

Number of moles = 10 g/ 58.44 gmol

Number of moles = 0.17 mol

1 Kg = 1 L

Molarity = 0.17 mol / 2 L

Molarity = 0.085 mol/L

Molarity = 0.085 M

Answer:

B. Convert the 10g of NaCl to moles of NaCl

Answer:

Hot springs are hot because of geothermal heat.  The Hot springs are acidic because hydrogen sulfide and carbon dioxide get in touch with water they evaporate which causes acid.

Explanation:

Answer:

c lined with aluminum foil

Answer:

The amount of 10.5 g magnesium carbonate is needed to make 5.0g of magnesium oxide.

So, option D is correct.

Given that, Magnesium carbonate decomposes on heating to form magnesium oxide and carbon dioxide as

                  MgCO₃ → MgO + CO₂

Molar mass of MgCO₃ = 24 + 12 + 48 = 84 g/mole

Molar mass of  MgO = 24 + 16 = 40g/mole

40 gram MgO is produced  from 84 gram of MgCO₃

1 gram of MgO produced  from  [tex]\frac{84}{40}=2.1[/tex] gram of MgCO₃

Therefore, 5 gram of MgO produced  from [tex](5*2.1=10.5gram)[/tex] of MgCO₃

Thus, option D is correct.

Learn more about molar mass here:

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Answer:

Explanation:

Given data:

Mass of alcohol = 400 g

Specific heat capacity of alcohol = 2.43 J/g°C

Initial temperature of alcohol = 16°C

Mass of water = 400 g

Specific heat capacity of water = 4.19 J/g°C

Initial temperature of water = 85°C

Final temperature of mixture = ?

Solution:

Equation:

m₁c₁ (T₂-T₁ ) = m₂c₂(T₂-T₁)

by putting values,

400 × 4.19  × (T₂ -  85°C) = 400 × 2.43  × (T₂ - 16°C)

1676  × (T₂ -  85°C) = 972 × (T₂ - 16°C)

Answer:

See explanation and image attached

Explanation:

The IUPAC system of nomenclature enables the structure of molecules to be written seamlessly from the name of the compound. Hence it is commonly called the systematic nomenclature.

The parent chain here is propane. It is substituted at the 2- position by a methyl group and at the 3-position by 4-chlorophenyl group as we can see in the image attached to this answer.

Answer:

my best guess is b

Explanation:

typically the lower the pitch the longer the wave line inbetween the inclines are

Answer:

you must go to jones im doing the same test

Explanation:

The chemical formula of sodium hydroxide is NaOH, and its molar mass is 40.01 g/mol. It is the alkali salt of sodium, and its structure is shown below:

It is an ionic compound consisting of sodium cation (Na+) and hydroxide (OH-) anion.

Answer:

the number of moles of atom is 0.91584

Answer:

pN₂ = 695 torr; pO₂ = 625 torr

Explanation:

Step 1: Calculate the moles of each gas

The molar mass of N₂ is 28.01 g/mol.

56 g × 1 mol/28.01 g = 2.0 mol

The molar mass of O₂ is 32.00 g/mol.

56 g × 1 mol/32.00 g = 1.8 mol

Step 2: Calculate the total number of moles

n = nO₂ + nN₂ = 1.8 mol + 2.0 mol = 3.8 mol

Step 3: Calculate the partial pressure of each gas

We will use the following expressions.

pN₂ = P × X(N₂)

pN₂ = 1320 torr × (2.0 mol/3.8 mol)

pN₂ = 695 torr

pO₂ = P × X(O₂)

pO₂ = 1320 torr × (1.8 mol/3.8 mol)

pO₂ = 625 torr

B. Kids should go to school for 12 years.

Scientific statements are those statements that must be falsifiable which means that able to be proven false while on the other hand, tautology is a statement that is true. The sun revolves around the earth” is an example of scientific statement because this statement can be falsifiable in the light of evidences and researches. Hypothesis is a statement that may be true or false. We can verify it by doing experiments.

So we can conclude that option B is the sentence that represents a scientific statement.

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In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

A chemical change is a change where something new can be formed and normally can not be changed back. Examples of a chemical change are precipitates being formed, gases being formed, quick temperature change rust, bubbling, foaming, burning, etc. A physical change is a change where nothing new is formed and normally can be changed back. For example you painted a wooden block red. If you want, you can always change the color again. Nothing chemically or permanantly happened to it. More examples of a physical change are; color change, change of state, luster, shape, size, hardeness, etc.      

                                                                                           :)

Answer:

a. 137.93 dm3

b. 150.61 L

Answer:

C₈H₁₈

Explanation:

The theoretical yield of the reaction : 151.64 g

The limiting reactant :  N₂

The excess reactant : H₂

Reaction

N₂+3H₂⇒2NH₃

A method that can be used to find limiting reactants is to divide the number of moles of known substances by their respective coefficients(mol ratio), and the smaller become a limiting reactant

mass of N₂=125 g

mol N₂(MW=28 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{125}{28}=4.46[/tex]

mass H₂ = 125 g

mol H₂(MW= 2 g/mol) :

[tex]\tt mol=\dfrac{125}{2}=62.5[/tex]

From the equation, mol ratio N₂ : H₂ = 1 : 3

Limiting reactant : N₂ : H₂ =

[tex]\tt \dfrac{4.46}{1}\div \dfrac{62.5}{3}=4.46\div 20.8[/tex]

N₂  : limiting reactant

H₂ : excess reactant

mol NH₃ based on limiting(N₂) (from equation N₂ : NH₃ = 1 : 2)

[tex]\tt mol~NH_3=\dfrac{2}{1}\times 4.46=8.92[/tex]

mass NH₃ (MW=17 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=8.92\times 17=151.64[/tex]

Answer:

Explanation: Analog signal is continuous in nature as it is well defined for every specific time. More specifically, it is the one defined continuously for a range of values with time. These are represented as a sinusoidal waveform. The figure below represents an analog signal:

analog signal

As we can see here that the signal is continuous in nature as its every value is specified for each particular interval of time, thus, is referred as the continuous-time signal. For the purpose of recording the analog signals, the actual signal must be preserved as only in that case we can record the accurate analog signal.

However, whenever in any application there arises a need to change an analog signal into a digital one then through sampling this can be achieved. In the sampling technique, this signal is sampled at certain fixed time intervals and the sampled voltage is converted into digital values.

Definition of Digital Signal

A type of signal which is non-continuous in nature as it is defined only for a set of discrete times is known as a digital signal. More simply, we can say, it is specified at some particular time instants only. Thus, here the information is represented as a set of discrete values. The figure given below shows the signal representation in digital form:

digital signal

Here it is clear that the data is discretely positioned in time axis thus is shown in the form of bits i.e., 0 and 1. This means that here the signal performs the sudden transition between 0 and 1 where these two values correspond to the two voltage levels. For the purpose of recording the signals, in the digital one, only the samples of the actual signal are taken and not the whole signal.

Key Differences Between Analog and Digital Signal

Analog and digital signals are differentiated mainly on the basis of their way to carry the information. Analog signals represent the information as a continuous function of time. As against, digital signals are represented discretely at specific time intervals.

Analog signals deteriorate more easily than digital one as their susceptibility towards noise is higher.

The devices that operate on an analog signal need more power for transmission and reception than the devices that work on the digital signal.

The information represented by the analog signal is comparatively more accurate than the digital signal due to its continuous range of values.

Analog signals are transmitted at a slower rate than digital signals as the information holds more values thus is precise.

An analog signal is defined by the amplitude, phase, frequency, etc. While the digital signal is mainly associated with bit rate, bit intervals, etc.

The sinusoidal representation of the analog signal makes it difficult to understand or get decoded thus encryption is not required in analog signals. But as the digital signals are in the form of square waves, thus, it can be decoded easily hence need to be encrypted for secured communication.

On the basis of processing, it is said that the continuous nature of the signal offers easy processing of the analog signal. However, the discrete nature of the signal offers difficultly in the processing of the digital signal.

Conclusion

Thus, the above discussion concludes that due to the way of representing the signal, the two are differentiated. And because of this, the two types of signals possess different properties and are used in different applications. Like analog signals are used in radio wave transmission and reception whereas digital signals are used in the field of digital electronics.

Answer:

Mass = 12.27 g

Explanation:

Given data:

Mass of NaCl are required = ?

Volume of AgNO₃ = 346 mL (346 mL× 1L/ 1000 mL = 0.346 L)

Molarity of AgNO₃ = 0.607 M

Solution:

Chemical equation:

NaCl  + AgNO₃     →    NaNO₃ + AgCl

Number of moles of AgNO₃:

Molarity = number of moles / volume in L

0.607 M = number of moles / 0.346 L

number of moles =  0.607 M × 0.346 L

number of moles =  0.21 mol

now we will compare the moles of NaCl and AgNO₃.

                       AgNO₃         :          NaCl        

                           1                :            1

                       0.21              :            0.21

Mass of NaCl:

Mass = number of moles × molar mass

Mass = 0.21 mol × 58.44 g/mol

Mass = 12.27 g

Answer:

sun shine

Explanation:

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time

Answer:

Sunlight

Explanation:

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered more than the other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. ... Also, the surface of Earth has reflected and scattered the light.

Answer:

Since 1 L equals to 1000 microlitres, and 1 microlitre equals to 1 gram, there are 56 * 1000 = 56000 grams of chlorine gas in 56 L of chlorine gas.

Explanation:

Hope this helped!

Answer:

Just to prove that the persons answer on top of mine is correct :D

Explanation:

Answer:

Explanation:

8

Explanation:

it's answer is false

hope it helps you