your hair stays wet after shower , molecules of water are actually sticking to your hair -explains why soil is able to hold water (and form mud).this property is sticking of water with unlike substance :

The answer of temperature change is mentioned below

The change in temperature is given by

 ΔT=Final Temperature −Initial Temperature  

Measurements of temperature

It is a measure of the degree of hotness or coldness of a body

To determine temperature changes,

the initial and final temperature of the iron and water is recorded.

For Iron

Iron at higher temperature is dipped in water

Water is at lower temperature so there will be change in temperature fo both

These data are recorded

Temperature change = Final temperature - Initial temperature.

a) Temperature change for metal =  200 -  100 = 100 0C

Temperature change for water = 22.5

Temperature change for both = 23.3

b)  For water 0.7

For iron Metal 76.6

To know more about temperature change

https://brainly.com/question/19724978

#SPJ1

Answer: initial temp of metal: 100 C, initial temp of water 22.4, final temp of both 27.1

Explanation:

Answer:bro u already have an answer why are you asking?

Explanation:

Answer:

yes

Explanation:

So the balanced equation is 2 Mg + O 2 2 MgO.. ... Example: 2Mg + O2 -> 2MgO Magnesium and oxygen combine to form the compound magnesium oxide.

Thus, to balance the O2 we put a 2 in front of the MgO. However, now there are 2 Mg's in the products and only one Mg in the reactants. To balance the Mg we then put a 2 in front of the Mg in the reactant. All atoms are now balanced in the reaction

Answer:

Yes.

Explanation:

Oxygen has 2 atoms, and so does Magnesium.

Hope this helped! Have a good night!

Answer:

hfghfhjcbnggf

Explanation:

layer1

layer 2

Answer:

Explanation:

The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.

Answer:

The nucleus of an atom is about 10-15 m in size; this means it is about 10-5 (or 1/100,000) of the size of the whole atom. ... (10-15 m is typical for the smaller nuclei; larger ones go up to about 10 times that.) Mass. Although it is very small, the nucleus is massive compared to the rest of the atom.

Explanation:

Answer:

How do amoeba respire.

Define Diffusion.

Answer: Bromine water

Explanation:

Alkanes are saturated hydrocarbons with single bond and the alkenes as unsaturated hydrocarbons with double bonds.

Bromine water is a chemical reagent which is used to distinguish between alkane and alkene.

It is of orange color in solution form and turns to colorless in alkene.

The alkanes to show any reaction with bromine water.

We need to write our reaction:

Ti + 2 F2 ==> TiF4

We have 2 reactants with 2 quantities of each one. To calculate the moles of TiF4 we need to know first which one is the limiting reactant.

We proceed like this:

Moles of Ti = 12.28 moles

Moles of F2 = 3.87 moles

We work with stoichiometry,

1 mol Ti --------- 2 x 1 mole F2

12.28 moles Ti ---------- X = 24.56 moles

According to this result, for 12.28 moles of Ti, we need 24.56 moles of F2, but we only have 3.87. So, The limiting reactant is F2 (we use this to calculate the number of moles of TiF4)

Moles of TiF4)

2 x 1 mole F2 -------------- 1 mole TiF4

3.87 moles F2 -------------- X = 1.94 moles

Answer: 1.94 moles TiF4

The expression 7.0x\(10^7\) ÷ 2.0x\(10^4\) can be expressed in proper scientific notation as 3.5x10^3.

To express the division 7.0x\(10^7\) ÷ 2.0x\(10^4\) in proper scientific notation, we need to perform the division and adjust the result to the appropriate format.

Dividing the numbers, we get:

7.0x\(10^7\) ÷ 2.0x\(10^4\)= 3.5x\(10^{(7-4)\)= 3.5x\(10^3\)

The result of the division is 3.5, and we adjust the exponent by subtracting the exponent of the divisor from the exponent of the dividend (7 - 4 = 3).

Therefore, the proper scientific notation representation of the division 7.0x\(10^7\) ÷ 2.0x\(10^4\) is 3.5x\(10^3\).

Scientific notation is a way to express numbers using a coefficient (in this case, 3.5) multiplied by a power of 10 (in this case, 10^3). It allows for more concise representation of very large or very small numbers.

In this case, the division resulted in a number that is smaller than the dividend and has a positive exponent, indicating a smaller magnitude compared to the original numbers. The coefficient represents the significant digits of the result, while the power of 10 represents the scale or magnitude of the number.

For more such questions on scientific notation visit:

https://brainly.com/question/28468914

#SPJ8

Answer:

pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.

Explanation:

hope this helps if not let me know have a great day

The number of oxygen atoms in a 120.0 g sample of diphosphorus pentoxide is 2.553 x 10^24. This answer has 4 significant digits and the unit symbol is "oxygen atoms".

To calculate the number of oxygen atoms in a 120.0 g sample of diphosphorus pentoxide (P2O5), we need to use the formula for the number of moles, which is:

n = m/M

Where n is the number of moles, m is the mass of the sample, and M is the molar mass of the compound.

The molar mass of P2O5 can be calculated by adding the molar masses of 2 phosphorus atoms and 5 oxygen atoms:

M = (2 x 30.97) + (5 x 16.00) = 141.94 g/mol

Now we can plug in the values into the formula:

n = 120.0 g / 141.94 g/mol = 0.8453 mol

To calculate the number of oxygen atoms, we need to multiply the number of moles by the Avogadro's number (6.022 x 10^23) and by the number of oxygen atoms in one molecule of P2O5 (5):

N = 0.8453 mol x 6.022 x 10^23 x 5 = 2.553 x 10^24 oxygen atoms

Therefore, the number of oxygen atoms in a 120.0 g sample of diphosphorus pentoxide is 2.553 x 10^24. This answer has 4 significant digits and the unit symbol is "oxygen atoms".

To know more about diphosphorus pentoxide, refer here:

https://brainly.com/question/28024394#

#SPJ11

Answer:

A type of an atom which has a different number of neutrons but the same atomic number, therefore making it the same element. This atom would still have the same properties as well. (Ex: Vanadium-51 is an isotope of Vanadium that has 51 neutrons but still has 23 protons, as its atomic number is 23.)

Isotopes are variants of an element that have the same number of protons in their atomic nucleus, identifying them as the same chemical element, but differ in the number of neutrons.

The variations in neutron numbers among isotopes lead to differences in their atomic masses, resulting in isotopes having slightly different physical properties while retaining similar chemical behavior.

For example, in the case of boron, the two isotopes listed may have the same number of protons (5), but one has 6 neutrons, and the other has 7 neutrons, leading to slightly different atomic masses.

Similarly, for carbon and oxygen, the isotopes exhibit variations in neutron numbers while maintaining the same number of protons, defining them as isotopes of the respective elements. Isotopes play a crucial role in various scientific fields, including radiometric dating, nuclear energy, and medical imaging.

To know more about Isotopes here

https://brainly.com/question/27475737

#SPJ3

The concentration of chloride ions when 2.5 g of FeCl is dissolved in 150 mL of water is approximately 0.54 M.

To determine the concentration of chloride ions when 2.5 g of FeCl is dissolved in 150 mL of water, we need to consider the molar mass of FeCl and perform some calculations.

The molar mass of FeCl is 55.85 g/mol (for iron) + 35.45 g/mol (for chlorine), which gives a total molar mass of 91.3 g/mol for FeCl.

First, we need to calculate the number of moles of FeCl present in 2.5 g of the compound. This can be done using the formula:

moles = mass / molar mass

moles of FeCl = 2.5 g / 91.3 g/mol = 0.027 moles

Next, we convert the volume of water from milliliters (mL) to liters (L):

volume of water = 150 mL = 150/1000 L = 0.15 L

Now, we can calculate the concentration of chloride ions (Cl-) using the formula:

concentration (Cl-) = moles of Cl- / volume of water

Since FeCl dissociates into one Fe3+ ion and three Cl- ions, the number of moles of Cl- is three times the moles of FeCl:

moles of Cl- = 3 * moles of FeCl = 3 * 0.027 moles = 0.081 moles

concentration (Cl-) = 0.081 moles / 0.15 L = 0.54 M.

For more such questions on concentration visit:

https://brainly.com/question/28564792

#SPJ8

The Ksp of SrCO3 is obtained as 1.6 * 10^-9.

The kind of salt used and the temperature of the solution both affect Ksp's value. It offers details on the maximum quantity of salt that can dissolve in the solvent under a specific set of circumstances.

A solution is referred to as supersaturated and the excess ions may precipitate out of solution if the concentration of the ions in it exceeds the value of Ksp.

We know that the Ksp for the SrCO3(s) can be obtained from;

Ksp = [Sr^2+] [CO3^2-]

Ksp = x^2

But  [Sr^2+] = [CO3^2-] = 4 * 10^-5 M = x

Thus;

Ksp = (4 * 10^-5)^2

= 1.6 * 10^-9

Learn more about Ksp:https://brainly.com/question/27132799

#SPJ1

Answer:

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place. Reaction rate is defined as the speed at which reactants are converted into products. Reaction rates can vary dramatically.

Explanation:

PLS MAKE ME AS BRAINLIST

It's answer is c. N2

The maximum bond energy is of N2 because N2 molecule is formed by 3 covalent bonds and O2 molecule is formed by 2 covalent bonds.

Hope it helps :)

Answer:

aluminium is all of isotope with 14 neutrons .

The following transition are n=5 to n=2 is balmer series, n=7 to n=2 is balmer series, n=5 to n=1 is lyman series, n=7 to n=1 is lyman series, n=3 to n=2 is balmer series, n=4 to n=3 is paschen series.

Energy level diagrams show us the various series of lines found in the hydrogen atom's spectrum. The diagram's horizontal lines represent various energy levels. An electron moves from a higher energy level to a lower energy level as shown by the vertical lines.

It is crucial that each transition correspond to a specific characteristic wavelength, as shown in the diagram. As a result, various transitions result in various line series. Among the different series acquired are the Lyman, Balmer, Paschen, Brackett, Pfund, and Henry series, to name a few.

to know more about wavelength visit

https://brainly.com/question/4112024

#SPJ4

The standard enthalpy change for the reaction 2A+B⇌2C+2D is  664 kJ/mol and The heat that is absorbed when 3.70 mol of A reacts is 2456.8  J

The heat changes that take place as reactants combine to generate a product are measured by the enthalpy of a reaction.

The following formula can be used to determine the enthalpy change of a reaction:

Hess's law states that

Enthalpy of reaction =  product's enthalpy - the reactant's enthalpy.

Considering the given reaction: 2A + B ⇌ 2C + 2D  

Enthalpy of reaction =  product's enthalpy - the reactant's enthalpy.

Enthalpy of reaction (ΔH°f) = (2 C + 2 D) - (2 * A + B)

Enthalpy of reaction  (ΔH°f)  = {[2(223) + 2(-523)] - [2(-245) + 2(-387)]}

Enthalpy of reaction  (ΔH°f)  = 664 kJ/mol

ΔH = q ÷ n

ΔH = molar enthalpy (heat) of solution

q = amount of energy (heat) released or absorbed

n = moles of solute

so. q = ΔH xn

q = ΔH xn

q = 664 kJ/mol x 3.70 mol

Q= 2456.8  J

Learn more about enthalpy of reaction at:

brainly.com/question/14291557

#SPJ1

Answer:

if eel u gngg ferr

Explanation:

asdads

If number of bonds is three (3) then bond angle is 120° and structure is trigonal and if number of bonds is four( 4) then bond angle will be 109° 28' and structure is tetrahedral.

The angle between two bonds in a complex molecule or between two orbitals that include bonding electron pairs encircling the core atom is the bond angle. It is calculated and represented in degrees using a spectroscopic method.

When a single electron pair there at central atom begins to resist the bound pair of electrons, the bond angle decreases and the bonds are slightly shifted inward. When there is a increase in back bonding, the bond angle increases.

To know more about bond angle visit :

https://brainly.com/question/6179102

#SPJ1

Answer:

Strong acids and bases completely dissociate into the respective ions, while weak acids and bases only partially dissociate into the H+ and OH- ions.

Answer: completely and dissociate

Explanation: Strong acids and bases completely dissociate into the respective ions, while weak acids and bases only partially dissociate into the H+ and OH- ions.

The cation, anion, and formula for the given compounds are as follows:

The formula of a compound is the formula that represents the compounds using the symbols of the elements and showing the ratio in which the elements combine to form the compound.

The ratio in which they combine is written as subscripts in the formula.

Learn more about the formula of compounds at: https://brainly.com/question/8007130

#SPJ1

Answer:

Life in the Han Dynasty (206 BCE - 220 CE) differed significantly from today in family, government, social structure, religion, and trade. For example, the Han Dynasty emphasized a patriarchal family structure, where the eldest male held authority, and filial piety was highly valued. In contrast, contemporary societies embrace more egalitarian family dynamics with shared decision-making.

The government system of the Han Dynasty relied on a centralized bureaucracy and emphasized meritocracy, while modern societies often adopted democratic systems. Socially, the Han Dynasty followed a hierarchical model influenced by Confucian principles, whereas contemporary societies strive for greater equality and social mobility.

Religion in the Han Dynasty combined Confucianism, Taoism, and Buddhism, whereas modern societies exhibit diverse religious beliefs. Lastly, trade in the Han Dynasty thrived along the Silk Road, while modern trade was globally interconnected and facilitated by technological advancements. These differences highlight the evolution of society over time.

Explanation:

Answer:

:)

Explanation:

Petroleum gas is mainly C3 and C4 based (propane and butane), whilst natural gas is predominantly C1 and C2 (methane and ethane). Petroleum gas is generally produced via the cracking of naphtha, which is one of the components separated during crude oil refining.

Petroleum is C3 or C4 (propane and butane) while Natural Gas is C1 and C2. (methane and ethane)

Petroleum is also produced differently then Natural Gas.

"Petroleum gas is generally produced via the cracking of naphtha, which is one of the components separated during crude oil refining." - socratic.org

The mass of hydrogen needed to produce 51.0 grams of ammonia is  ≈ 9.07 grams.

To determine the mass of hydrogen required to produce 51.0 grams of ammonia (NH3) using the Haber process, we need to calculate the stoichiometric ratio between hydrogen and ammonia.

From the balanced chemical equation:

3 H₂(g) + N₂(g) → 2 NH₃(g)

We can see that for every 3 moles of hydrogen (H₂), we obtain 2 moles of ammonia (NH₃).

First, we need to convert the given mass of ammonia (51.0 grams) to moles. The molar mass of NH₃ is 17.03 g/mol.

Number of moles of NH₃ = Mass / Molar mass

                     = 51.0 g / 17.03 g/mol

                     ≈ 2.995 moles

Next, using the stoichiometric ratio, we can calculate the moles of hydrogen required.

Moles of H₂ = (Moles of NH₃ × Coefficient of H₂) / Coefficient of NH₃

           = (2.995 moles × 3) / 2

           ≈ 4.493 moles

Finally, we can convert the moles of hydrogen to mass using the molar mass of hydrogen (2.02 g/mol).

Mass of H₂ = Moles × Molar mass

          = 4.493 moles × 2.02 g/mol

          ≈ 9.07 grams

Therefore, approximately 9.07 grams of hydrogen is needed to produce 51.0 grams of ammonia in the Haber process.

Know more about the mass of hydrogen here:
https://brainly.com/question/14083730

#SPJ8

Answer: no answer

Explanation: