Can anyone answer these 4 questions?​

Answer:

Ag2SO4

Explanation:

Answer:

An ice cube melting is a physical change because melting doesn't change the composition of the element. Paper burning is a chemical change because combustion occurs. Bubbles forming in a soda does involve chemical changes. Hard-boiling an egg is a chemical change because the egg's composition changed.

Complete question is;

Glycerin, C3H8O3, is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 164 g glycerin to 338 mL H2O ​at 39.8°C?

The vapor pressure of pure water at 39.8°C is 54.74 torr and its density is 0.0992 g/cm³

Answer:

28 torr

Explanation:

Let's first find the number of moles of water in 338 mL.

Molar mass of water = 18 g/mole

Formula for number of moles = mass/molar mass.

Mass = density × volume = 0.0992 × 338 = 33.5296 g

Thus;

Number of moles = 33.5296/18 = 1.863 moles.

Let's use the same procedure to find the Number of moles of glycerine.

Molar mass of glycerine from online values = 92.1 g/mol

Thus;

n_glycerine = (mass)/92.1

We have mass and density as 164 g and 0.0992 g/cm³ respectively.

n_glycerine = 164/92.1

n_glycerine = 1.78

Total moles of solution = 1.863 + 1.78 = 3.643 moles

We are told that The vapor pressure of pure water at 39.8°C is 54.74 torr

Thus, since water dominates, then vapour pressure of solution = (1.863/3.643) × 54.74 ≈ 28 torr

Answer:

La electrólisis es un proceso físico por el que se descompone una sustancia en disolución a través de la corriente eléctrica. Para que la electrólisis sea posible es necesaria una fuente de alimentación continua, una disolución iónica y dos polos (ánodo y cátodo), que atraen hacia sí los iones de signo opuesto.

Explanation: Once swallowed, a drink enters the stomach and small intestine, where small blood vessels carry it to the bloodstream. Approximately 20% of alcohol is absorbed through the stomach and most of the remaining 80% is absorbed through the small intestine.

Answer:

Answer:

D. 2

Explanation:

On the right side of the equation:

Al has 1, Zn has 3, NO3 has 6

But on the left side:

Al has 1, Zn has 1, NO3 has 3

1. So, if we add a coefficient of 2 to Al(NO3)3, then NO3 now has 6-which is what it needs.

2. But now the Al on the right side of the equation is not balanced, so give it a coefficient of 2.

3. To make the Zn balance, just add a coefficient of 3 on the left side of the equation.

Which leaves us with:

2Al + 3Zn(NO3)2 --> 2Al(NO3)3 + 3Zn

And now there are the same number of each compound on both sides of the equation.

Good luck! If you have any questions on this answer leave a comment :)

[tex] \red{ \bold {\huge{ \textit{ \boxed {{\blue{QUESTION}}}}}}}[/tex]

WHAT IS KNOWN AS HYBRIDIZATION

[tex]\huge\boxed{\fcolorbox{red}{blue}{ ANSWER }}[/tex]

[tex] \orange{\underline{\huge{\bold{\textit{\green{\bf{HYBRIDIZATION}}}}}}} [/tex]

The hybrid orbitals r of same level .

The Hybridization takes place in between orbitals of equal or very less energy levels to form same level of energy in all orbitals.

The orbitals combine is always equal to The number of orbitals formed

The names of hybridized orbitals r kept according to the orbital which r combined to form them

sp orbital :- one s and one p combine to form sp orbital

[tex]s {p}^{2} [/tex]orbital :- one s and two p orbitals combine to form it..

[tex]\:\:\:\:\:\:\:\:\star DEVIL005\star[/tex]

Answer:

metro= 22g

Explanation:

Answer:

The answer would be [HCIO][OH-]

_________

[CIO-]

Explanation:

So, the answer would be (b).

Answer:

Similar charges seek to be the maximum distance possible from each other

Explanation:

On a charged sphere, there are like charges and these like charges are repelled by each other to the far ends of the sphere. Hence they are distributed uniformly in the sphere.

Answer:

What element is this. Would you mind inserting a picture or naming the element in the comments section

Formula of xenon trioxide = XeO3

Relative atomic mass: Xe = 131.29, O = 16

Question 1

number of moles = mass / molar mass

n of XeO3 = 9.07 / 131.29 + 3(16)

= 0.05059 mol

number of moles = number of particle / Alvagadro's constant

0.05059 = number of molecule / 6.02 x 10²³

number of molecules = 3.046 x 10²²

Question 2

number of moles = number of particle / Alvagadro's constant

number of moles = 3.22 x 10²² / 6.02 x 10²³

number of moles = 0.05349 mol

number of moles = mass / molar mass

0.05349 = mass / 131.29 + 3(16)

mass = 9.590g

Answer:

937.5g

Explanation:

No of moles = mass ÷ molar mass

According to this question, there are 15moles of the compound; AlCl

Molar mass of AlCl = 27 + 35.5

= 62.5g/mol

Using n = m/M.M

15 = m/62.5

m = 15 × 62.5

m = 937.5g

Answer:

Pb(NO₃)₂ + Na₂CrO₄ —> PbCrO₄ + 2NaNO₃

The coefficients are: 1, 1, 1, 2

Explanation:

Pb(NO₃)₂ + Na₂CrO₄ —> PbCrO₄ + NaNO₃

The above equation can be balance as follow:

Pb(NO₃)₂ + Na₂CrO₄ —> PbCrO₄ + NaNO₃

There are 2 atoms of Na on the left side and 1 atom on the right side. It can be balance by writing 2 before NaNO₃ as shown below:

Pb(NO₃)₂ + Na₂CrO₄ —> PbCrO₄ + 2NaNO₃

Now the equation is balanced.

The coefficients are: 1, 1, 1, 2

Answer:

10 m

Explanation:

From the question given above, the following data were obtained:

Velocity (v) = 14 m/s

Acceleration due to gravity (g) = 9.8 m/s²

Height (h) =?

Next, we shall determine the energy. This can be obtained as follow:

Velocity (v) = 14 m/s

Kinetic Energy (KE) =?

KE = ½mv²

KE = ½ × m × 14²

KE = ½ × m × 196

KE = m × 98

Finally, we shall determine the height. This can be obtained as follow:

Kinetic energy (KE) = m × 98

Acceleration due to gravity (g) = 9.8 m/s²

Height (h) =?

Since the object is falling from a particular height,

Potential energy (PE) = kinetic energy (KE)

PE = mgh

KE = m × 98

m × 9.8 × h = m × 98

Divide both side by m × 9.8

h = m × 98 / m × 9.8

h = 10 m

Thus, the bottle was dropped from a height of 10 m

Answer:

positive force → balanced force → negative force

Explanation:

np

Answer:

positive force → balanced force → negative force

Explanation:

:)))

Answer:

This is because peroxy oxygen bonded to hydrogen can easily undergo nucleophilic protonation with the carbonyl carbon to form an alcohol

Explanation:

A ketone is a functional group that contains a carbonyl group (carbon-oxygen double bond ( R1R2-C=O).

The carbonyl carbon doubly bonded to the oxygen is electron deficient as a result of difference in electronegativity between carbon and oxygen, hence is susceptible to nucleophilic attacks

R1R2 - C = O

where R1 and R2 are organic substituents.

The peroxy oxygen that is bonded to hydrogen (H -O-O-R) is the electron-rich centre and easily attacks electron-deficient centres like the carbonyl carbon in ketones to form an alcohol.

The bond between the hydrogen attached to the peroxy oxygen is broken and the resultant hydrogen ion undergoes protonation with the oxygen of the carbonyl group to form an alcohol

R1R2 - C = O + H - O-O - R =>

R1R2- CH - OH + R - O-O-R1

Answer:

A structure that obeys the octet rule for each molecule or ion is [tex]XeO_4[/tex]  

Explanation:

Here in [tex]XeO_4[/tex]   , Xenon  has  8 valence electrons and each oxygen atom has 6 valence electrons  

Lewis structure for [tex]XeO_4[/tex] is shown below :

Here , all atoms are having their complete octet .

All the atoms in this Lewis structure is having their complete octet .

Resonance structure is not required as all atoms are same that is oxygen .

Answer:

Please find the definition and further explanation below

Explanation:

Based on the ability for the solvent (liquid substance) to dissolve a solute (solid substance), a solution can either be unsaturated, saturated or supersaturated. A SATURATED SOLUTION is that which contains the maximum amount of solute a solvent can possibly dissolve.

In other words, a saturated solution can no longer dissolve anymore solute, and hence, any further solute added forms crystals or makes the solution supersaturated.

Answer:

heat mixture/stir

Explanation:

these are factors of dissolving of solvent faster

Answer:

highly reactive nonmetal

Explanation:

Fluorine is a member of group 7 elements on the periodic table called HALOGENS. Just like other members of its group like chlorine, iodine etc., fluorine is a nonmetallic element. Fluorine is regarded as the most reactive element on the periodic table because of its affinity to accept electrons i.e. most electronegative element.

According to this question, fluorine is an highly reactive nonmetal based on its location on the periodic table.

Answer:

highly reactive nonmetal

Explanation:

edge 21

Answer:

39.02 amu

Explanation:

The average atomic mass of an element can be calculated as follows :

[tex]X=\dfrac{9.67\times 38+78.68\times 39+11.34\times 40+0.31\times 41}{100}\\\\X=\dfrac{3902.29}{100}\\\\X=39.02\ amu[/tex]

So, the atomic mass of the element X is 39.02 amu.

Answer:

C2H4O2 + 2O2 ==> 2CO2 + 2H2O

Explanation:

Start with the carbons

C2H4O2 + O2 ==> 2CO2 + H2O There are 2 on the left, so you need 2 on the right.

Next deal with the hydrogens. You have 4 on the left so you have to make 4 on the right

C2H4O2 + O2 ==> 2CO2 + 2H2O

The oxygens are the real devil in this question. Be careful how you handle them. There are 2 * 2 = 4 from the CO2 and 2*1 = 2 from the water. The total is 6

Now you can't just put a 3 in front of the O2. There are 2 in the given chemical. So you don't need 6. You need 6 -2 = 4. But the oxygen is O2. You have to divide the 4 by 2 to get 2

C2H4O2 + 2O2 ==> 2CO2 + 2H2O  

And that's your answer.

Answer:

D. Microwave, Blue Visible Light, Ultraviolet, Gamma

Explanation:

colors longest to shortest are

red green blue violet

longest wavelength to shortest:

radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays.

Answer:

I belive C: essential amino acids

Explanation:

They can t be made from the body so they must be obtained my food