please help i don’t know this at all i am in a test

Answer:

The Presence of inter molecular hydrogen bonding makes it to heat at higher temperature as energy required to break them , hence the high specific heat

Answer:

There's no graph attached to the question

Answer:

[tex]\boxed {\boxed {\sf 0.068 \ mol \ NaCl}}[/tex]

Explanation:

To convert from molecules to moles, Avogadro's Number must be used. This number is 6.022 *10²³. It tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance.

In this case, the particles are molecules of sodium chloride. We can make a ratio.

[tex]\frac {6.022*10^{23} \ molecules \ NaCl}{ 1 \ mol \ NaCl}[/tex]

Multiply by the given number of molecules.

[tex]4.1*10^{22} \ molecules \ NaCl *\frac {6.022*10^{23} \ molecules \ NaCl}{ 1 \ mol \ NaCl}[/tex]

Flip the fraction so the moles of sodium chloride cancel.

[tex]4.1*10^{22} \ molecules \ NaCl *\frac {1 \ mol \ NaCl}{6.022*10^{23} \ molecules \ NaCl }[/tex]

[tex]4.1*10^{22} *\frac {1 \ mol \ NaCl}{6.022*10^{23} }[/tex]

[tex]\frac {4.1*10^{22} \ mol \ NaCl}{6.022*10^{23} }[/tex]

[tex]0.06808369313 \ mol \ NaCl[/tex]

The original measurement of molecules has 2 significant figures, so our answer must have the same. For the number we calculated that is the thousandth place.

The 0 in the ten thousandth place tells us to leave the 8.

[tex]0.068 \ mol \ NaCl[/tex]

There are 0.068 moles of sodium chloride.

Answer: the answer is n= 0.487 mol

Explanation: i took the test and got it right

Answer:

D. Compounds

Explanation:

Because it's says that have 3 components

Answer:

Ca(NO3)2 + Na2C2O4 ---> <---- Ca + 2NO3 + 2Na + C2O4

Answer:

D Propane

Explanation:

Very weak intermolecular forces between alkane MOLECULES AND IT'S COLOURLESS GASES IN ROOM TEMPERATURE

Answer:

It's A) and E)

Explanation:

Did the assignment

Answer:

A. conversion of glycogen to glucose and

E. breakdown of ATP to form ADP

Explanation: I also did the assignment.

Answer:

1 mol of atoms = 6.022 ×1023 atoms. 3.5mol × 6.022 × 1023 atoms 1mol = 2.11 × 1024 atoms =.........

Explanation:

2160.64 atoms!

Answer: #1 2Al + 2S - Al2S2

Explanation: You have to make sure there are 2 of each on each side

Answer:

the same amount of protons

Answer:

Given

mass of H2O (m) =35.6g

molarmass (mr) = H2O ), 1x2+16=18g/mol

moles of H2O (n) =?

sln

n=m/mr

n=35.6g/18g/mol

n=1.978moles

the moles of H2O are 1.978moles

Answer:

For rusting, it is difficult to write an equation due to the complexity of the reaction. Thus, we can express the reaction like the following. According to the law of conservation of mass, the increased mass of nail and rust is the amount of oxygen.

Explanation:

I hope this helps:)

Answer:

4092 atoms of iron i am guessing

Explanation:

Answer:

Entropy increases as temperature increases. An increase in temperature means that the particles of the substance have greater kinetic energy. The faster moving particles have more disorder than particles that are moving more slowly at a lower temperature.

Explanation:

The entropy of the system increase as the temperature increase because at higher temperature there will be more randomness in the molecules.

Entropy can be described as a measure of spontaneous changes that take place in a system. In simpler words, entropy is the tendency of the universe towards disorder.

Entropy measures of randomness or disorder of a thermodynamic system and is represented by ‘S’. The value of entropy is dependent upon the amount of substance so it is an extensive property.

The change in the value of entropy depends on changes in quantities such as temperature, pressure, volume, and the number of moles of substance present in the system.

When the temperature of the system increases the kinetic energy of the molecules increases and they start to move faster. Therefore, the entropy of the geyser system increase as energy is added to the system.

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Answer:

the answer is C neutral

Explanation:

if the ph is lower then 7 its acidic

if its higher then 7 its basic

and a ph of 7 is neutral

Answer:

When the gas is heated, the particles will gain kinetic energy which will make them move faster.

Explanation:

Answer:

s+o2=so2

Explanation:

i hope it will help u

Answer:

Valence electrons increase as you go across the table (by periods)

Orbital Shells increase as you go down the table (rows)

Answer:

There are 11 protons in a sodium atom but only 3 in a lithium atom, so the nuclear charge is much greater. ... The only factor left is the extra distance between the outer electron and the nucleus in sodium's case. That lowers the ionization energy.

Answer:

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Answer:

j

Explanation:

Answer:

we need to see the diagram

Explanation:

Answer:

Explanation:

By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years

Answer:

A dipole-dipole force is when the positive side of a polar molecule attracts the negative side of another polar molecule.

A hydrogen bond is a dipole-dipole force and is an attraction between a slightly positive hydrogen on one molecule and a slightly negative atom on another molecule.

Answer:

Hydrogen bonds are dipole-dipole interactions in which at least one of the atoms involved is a hydrogen atom. Dipole-induced dipole bonds are those electric bonds that exist between a molecule with a permanent dipole moment and a molecule in which a temporary dipole moment has been induced.

Answer: N2F4

Explanation:

The amount of atoms of plutonium – 239 that would remain after 48240 years is 5 atoms

n = t / t½

n = 48240 / 24100

n = 2

N = N₀ / 2ⁿ

N = 20 / 2²

N = 20 / 4

N = 5 atoms

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Answer:

Copper sulphate is an acidic salt: It is the product of the reaction between a weak copper base and a strong acid , H2SO4

Litmus has a red colour in acidic solutions:

Conclusion: Acidic copper sulphate solution turns blue litmus to red

Baking soda is a basic salt : It is the reaction product of a weak acid , CO2 and a strong base , NaOH

Litmus has a blue colour in basic solutions:

Conclusion: basic baking soda solution turns red litmus to blue