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Answer:

decrease temperature of the oxygen

Explanation:

Answer: I believe it it decrease temp of oxygen

Explanation:

Answer:

0.22moles

Explanation:

Given parameters:

Volume of gas = 4.92L

Unknown:

Number of moles  = ?

Condition = STP

Solution

At STP, the number of moles of a given gas is expressed as;

     Number of moles  = [tex]\frac{volume given}{22.4}[/tex]  

 Number of moles  = [tex]\frac{4.92}{22.4}[/tex]   = 0.22moles

Answer:

A

Explanation:

The translation of the question is

250 g of alcohol have been put in a glass together with 2 g of iodine, which dissolve completely. Calculate the concentration of the solution in% by mass?

Answer:

The %mass by mass of the given solution is 0.794%

Explanation:

We are given

Mass of solute(Iodine) = 2g

Mass of the solvent (Alcohol) = 250g

Since the Iodine dissolves completely in Alcohol

Total mass of the solution = 250 + 2 = 252g

the formula of concentration of the solution in  % by  Mass is given by

%[tex]\frac{w}{W} = \frac{Mass of the solute*100}{Total mass of the solution}[/tex]

%w/W = [tex]\frac{2*100}{252}[/tex]

          = 0.794%

Therefore the %mass by mass of the given solution is 0.794%

In container E, the pressure will be higher than container D

Given

Container with :

Required

The higher pressure container

Boyle's Law  stated that :

At a constant temperature, the gas volume is inversely proportional to the pressure applied  

[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]

From the diagram (picture), it shows that the volume of container D is greater than container E, so the pressure applied to container D will be less than the pressure applied to container E

Answer:

def don't understand that sorry

Explanation:

Hydrochloric acid is HCl.

Hydrogen is H2.

Mole ratio is the numbers infront of them, which is 6 : 3.

Answer:Hydrochloric acid is HCl.

Hydrogen is H2.

Explanation:

Answer:

B 100 cm3

Explanation:

The balanced equation is given as;

2H2(g)+ O2(g) --> 2H2O(g)

From the reaction stochiometry, 2 cm3 of H2 would react with 1 cm3 of O2 to form 2 cm3 of H2O

Before Reaction --> 100cm3 of H2,   25cm3 of O2,  0cm3 of H2O

During Reaction --> 50cm3 of H2,    25cm3 of O2,   50cm3 of H2O

(Oxygen is sed uup in the reaction)

After Reaction   --> 50cm3 of H2,    0cm3 of O2,     50cm3 of H2O

Total volume left = Unreacted H2 (50cm3)  +  50cm3 of H2O formed

Total Volume left = 50  + 50  =  100cm3

The total volume of gas present at the end of the reaction is 100 cm³

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

The balanced equation is given as;

2H₂(g)+ O₂(g) → 2H₂O(g)

From the reaction stoichiometry, 2 moles of H₂ would react with 1 mole of O₂ to form 2 moles of H₂O

Before Reaction:  100cm³ of H₂,   25cm³ of O₂,  0cm³ of H₂O

During Reaction:  50cm³ of H₂,    25cm³ of O₂,   50cm³ of H₂O

(Oxygen is used up in the reaction)

After Reaction:  50cm³ of H₂,    0cm³ of O₂,     50cm³ of H₂O

Total volume left = Unreacted H₂ (50cm³)  +  50cm³ of H₂O formed

Total Volume left = 50  + 50  =  100cm³

Hence, The total volume of gas present at the end of the reaction is 100 cm³

To learn more about chemical reactions, click here:

https://brainly.com/question/6876669

The pressure at the bottom : 19600 N/m²

Given

A ground water tank has its height 2m

Required

The pressure at its bottom

Solution

Hydrostatic pressure is the pressure caused by the weight of a liquid.  

The weight of a liquid is affected by the force of gravity.  

The hydrostatic pressure of a liquid can be formulated:  

[tex]\large{\boxed{\bold {P_h ~ = ~ \rho.g.h}}[/tex]

Ph = hydrostatic pressure (N / m², Pa)  

ρ = density of liquid (kg / m³)  

g = acceleration due to gravity (m / s²)  

h = height / depth of liquid surface (m)  

ρ = density of water (kg / m³) = 1000

g = acceleration due to gravity = 9.8 m/ sec²

The pressure

[tex]\tt P=1000\times 9.8\times 2=19600~N/m^2[/tex]

Answer:

...............

Answer:

chemical energy

Explanation:

Answer:

a liquid with weak intermolecular forces and a high temperature

Explanation:

According to encyclopedia Britannica, "Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature. The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid."

This implies that the vapour pressure of a liquid tends to increase as the temperature of the liquid increases. Recall that vapour pressure also depends on the magnitude of intermolecular forces. The greater the magnitude of intermolecular forces, the lower the vapour pressure hence water has very much higher vapour pressure than ethane.

Answer:

A liquid with weak  intermolecular forces and a high temperature

Explanation:

I just took the test and got it right

Answer:

that is a false sentence

Answer:

I'm sure you've already finished the est but the real answer is true, I took the k12 test and got that one correct, hope this helps anyone!

Explanation:

Answer: 1 gallon

Explanation:

Answer:

1 gallon

Explanation:

because gallons are constisting of cups and 1 cup wont be enough for a fish to swim

Answer:

c lined with aluminum foil

Answer:

3.5 milligram

Explanation:

From;

N/No = (1/2)^t/t1/2

Where;

N = amount of Po-210 that remains unchanged after 414 days

No = 28.0 milligram of Po-210 originally present

t = 414 days

t1/2 = half life of Po-210 = 138 days

Substituting values;

N/28 = (1/2)^414/138

N/28 = (1/2)^3

N/28 = 1/8

8N = 28

N = 28/8

N = 3.5 milligram

Answer:

i don't knoblol

Explanation:

i don't know lol

Answer:

a compound of high molecular weight derived either by the addition of many smaller molecules, as polyethylene, or by the condensation of many smaller molecules with the elimination of water, alcohol, or the like, as nylon. a compound formed from two or more polymeric compounds.

Explanation:

HOPE IT HELPS YOU:))

Answer:

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

Explanation:

Answer:

Explanation:

8

Explanation:

C2H5OH is ethanol, which is a compound.

Answer:

B) 1.6 g

Explanation:

**********************************************

Answer:

Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.

Explanation:

Hope this helped!!!

-BB

please  mark me brainly

Answer:

It's an element. :)

Explanation:

Answer:

becomes negatively charged

Explanation:

this is because when an object receives electrons it becomes negatively charged and the object that loses electrons becomes positively charged.

Answer:

First one because by adding more electrons it makes something more negative. So it becomes negatively charged

Answer:

The answer is: Atomic radii decreases from left to right across a period and increases from top to bottom in a group.

Explanation:

Answer: The moles of nitrogen dioxide produced are 96.3

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{3714L}{22.4L}=165.8moles[/tex]

[tex]4NH_3(g)+7O_2(g)\rightarrow 4NO_2(g)+6H_2O(g)[/tex]

According to stoichiometry:

7 moles of oxygen [tex](O_2)[/tex] produce = 4 moles of nitrogen dioxide [tex](NO_2)[/tex]

Thus 168.5 moles of oxygen [tex](O_2)[/tex] will produce = [tex]\frac{4}{7}\times 168.5=96.3[/tex] moles of nitrogen dioxide [tex](NO_2)[/tex]

Answer:

It melts some of the ice cream and it makes it easier for him to scoop the ice cream out

Explanation:

Answer:

See explanation

Explanation:

When left to stand, a solution of  Iron II chloride is converted to Iron III chloride by oxidation in air.

The Iron III chloride is composed of weak field ligands in its coordination sphere. These weak field ligands mostly occur in a high spin configuration hence, the central iron atom can be converted from Fe[(H20)6]^2+ .2Cl^-(high spin d6) to Fe^3+[(H20)6]^3+ .3Cl^-(high spin d5).