Which one is correct

radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. Your mind interprets the energies of light as different colors, from red to violet.

Answer:

0.5 moles OF CARBON WILL BE BURNT SHOULD 196.5 kJ OF HEAT IS LIBERATED IN THE REACTION.

Explanation:

The standard heat of combustion of a substance is the heat evolved when one mole of the substance is burned completely in oxygen under standard conditions.

From the reaction, -393kJ of heat is required to burn 1 mole of Carbon completely in oxygen.

C(s) + O2 (g) -----> CO2(g)        -393 kJ mol^-1

Should 196.5 kJ of heat was evolved by the reaction, the number of moles of carbon to be produced will be x moles;

-393 kJmol^-1 of heat was required to burn 1 mole of Carbon

196.5 kJ/mol of heat will burn x moles of carbon.

x = ( 196.5 * 1 / -393)

x = -0.5 moles

0.5 moles of carbon will be burnt when 196.5 kJ of heat is liberated

Answer:

This is a balanced equation because the same types of atoms and the same numbers of each atom are present on both sides of the equation. 8 S atoms are found on both sides of the equation, and 48 F atoms are found on both sides of the equation. S8 and 24F2 are the reactants; 8SF6 is the product. This is a combination reaction because two substances (S8 and 24F2) undergo a chemical union to form a more complex substance (8SF6).

S8+24F2→8SF6

Explanation:

Answer:

Common properties of hydrocarbons are the facts that they produce steam, carbon dioxide and heat during combustion and that oxygen is required for combustion to take place. The simplest hydrocarbon, methane, burns as follows: CH4 + 2 O2 → 2 H2O + CO2 + energy.

Explanation:

Answer:

Atoms of Zn (s) lose electrons and are oxidized. Atoms of Zn (s) lose electrons and are reduced. There is a net loss of mass. There is a net gain of mass.

Explanation:

Answer:

THE INITIAL VOLUME OF THE STOCK SOLUTION IS 0.0392 L OR 39.2 mL

Explanation:

To calculate the volume of a solution before dilution, we make use of the dilution formula;

C1 V1 = C2 V2

C1 = the concentration of the stock solution = 15 M

V 1 = the volume of stock solution = ?

C2 = concentartion of final solution = 2.35 M

V2 = volume of final solution = 250 mL = 250/ 1000 = 0.25 L

Rearranging the formula, we obtain;

V1 = C2V2 / C1

V 1 = 2.35 * 0.25 / 15

V1 = 0.5875 / 15

V1 = 0.0392 L

the initial volume of the stock solution is 0.0392 L or 39.2 mL

Answer: you will need 400 potatoes

Explanation:

Answer:

The correct answer to the following question will be Option B "8.4 mol".

Explanation:

The given values are:

Molarity of a solution = 0.021 M

Litres of solution = 400 L

Let the moles be "x".

As we know,

⇒  [tex]Molarity = \frac{Moles \ of \ solute}{Litres \ of \ solution}[/tex]

On putting the estimated values, we get

⇒  [tex]0.021=\frac{x}{400}[/tex]

On applying cross-multiplication, we get

⇒  [tex]x =0.021\times 400[/tex]

⇒  [tex]x=8.4 \ mol[/tex]

Answer:

The periodic table is an arrangement of chemical elements based on increasing atomic numbers.

Explanation:

The periodic table is an arrangement of chemical elements in order of increasing atomic numbers. According to the modern periodic law, the properties of elements is a periodic function of their atomic numbers.

The periodic table is arranged in columns and rows. The columns are called groups of elements. All elements in the same group have the same number of electrons on their outermost shell hence they possess the same chemical behavior. Elements across a period have the same number of shells thus they have the same maximum excitation level.

There are important trends across the periodic table such as atomic radius, ionic radius, electro negativity, electron affinity, melting and boiling points, metallic properties etc. All these depend on an elements position in the periodic table. periodic properties of elements increase or decrease across the period or increase or decrease down the group as the case maybe.

Hence, just as one can easily read off the date and make predictions based on dates shown in a calendar, a chemist can read off the properties of elements and make predictions about the reactivity and physical properties of elements based on their relative position in the periodic table.

Gradual changes that occur down the group in the periodic table are called group trends and they usually very significant in discussing the properties of members of a group.

Answer:

The periodic table is an arrangement of chemical elements based on increasing atomic numbers.

Explanation:

The periodic table is an arrangement of chemical elements in order of increasing atomic numbers. According to the modern periodic law, the properties of elements is a periodic function of their atomic numbers.

The periodic table is arranged in columns and rows. The columns are called groups of elements. All elements in the same group have the same number of electrons on their outermost shell hence they possess the same chemical behavior. Elements across a period have the same number of shells thus they have the same maximum excitation level.

There are important trends across the periodic table such as atomic radius, ionic radius, electro negativity, electron affinity, melting and boiling points, metallic properties etc. All these depend on an elements position in the periodic table. periodic properties of elements increase or decrease across the period or increase or decrease down the group as the case maybe.

Hence, just as one can easily read off the date and make predictions based on dates shown in a calendar, a chemist can read off the properties of elements and make predictions about the reactivity and physical properties of elements based on their relative position in the periodic table.

Gradual changes that occur down the group in the periodic table are called group trends and they usually very significant in discussing the properties of members of a group.

Explanation:

Answer:

they often form hydroxide ions

Explanation:

Answer:

Greenhouse gasses got their name from a greenhouse

Explanation:

Since greenhouses have plants inside in which the building lets sunlight in to the plants and greenhouse gasses trap heat. (sorry if my answer is confusing)

Answer:

The amount of energy produced is less than 454 kJ.

Explanation:

I do not know but if am wrong you can correct me. I need your help for business, english and chemistry questions on my profile. So can you and the other person who commented and go on my profile please...? the due date already gone 12 days ago.

Answer:

B

Explanation:

The answer is substitution

Answer:

I think its city y, I don't know if its right though.

Explanation:

Answer: a computer

Explanation:

Answer: The volume of product formed is 0.26 L

Explanation:

[tex]\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} H_2=\frac{0.02g}{2g/mol}=0.01moles[/tex]

[tex]2H_2(l)+O_2(l)\rightarrow 2H_2O(g)[/tex]

As [tex]O_2[/tex] is the the excess reagent, [tex]H_2[/tex] is the limiting reagent as it limits the formation of product.

According to stoichiometry :

2 moles of [tex]H_2[/tex] give = 2 moles of [tex]H_2O[/tex]

Thus 0.01 moles of [tex]H_2[/tex] will give =[tex]\frac{2}{2}\times 0.01=0.01moles[/tex]  of [tex]H_2O[/tex]

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 101.325 kPa = 1 atm

V = Volume of gas = ?

n = number of moles = 0.01

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]40^0C=(40+273)K=313K[/tex]

[tex]V=\frac{nRT}{P}[/tex]

[tex]V=\frac{0.01mol\times 0.0821L atm/K mol\times 313K}{1atm}=0.26L[/tex]

Thus the volume of product formed is 0.26 L

Answer:

the concentration is 10^(-8) M

The concentration of [H30+] in the solution when the pH of the solution is [tex]1.32*10^8\ m.[/tex]

Since The pH of a solution is 7.880

So here

pH = -log{H+}

{H+} = [tex]10^-PH[/tex]

[H30+] [tex]= 10^{-7.88}[/tex]

[tex]= 1.3182*10^-8\ mol\\\\= 1.32*10^-8\ m[/tex]

hence, The concentration of [H30+] in the solution is [tex]1.32*10^8\ m.[/tex]

Learn more about concentration here: https://brainly.com/question/23063846

Answer:

Pluto is farthest from the sun and hence it receives extremely low energy of sun. The surface temperature of Pluto is about -240 !!!

Answer:

0.46M NaS₂O₃ (Assuming KIO₃ solution with a concentration of 1.0M)

Explanation:

Based on the reaction:

6 Na₂S₂O₃ + KIO₃ + 5 KI + 3 H₂SO₄ → 3 Na₂S₄O₆ + 3 H₂O + 3 K₂SO₄ + 6 NaI

6 moles of  Na₂S₂O₃ react per mole of KIO₃

Assuming the molarity of the KIO₃ solution is 0,1M:

Moles of KIO₃: = 5.0x10⁻³L ₓ (0.1 mol / L) = 5.0x10⁻⁴ moles

As 6 moles of thiosulfate reacted per mole of iodate:

5.0x10⁻⁴ moles KIO₃ ₓ (6 moles Na₂S₂O₃ /  1 mole KIO₃) =

3.0x10⁻³ moles of Na₂S₂O₃. In 6.5mL (6.5x10⁻³L):

3.0x10⁻³moles Na₂S₂O₃ / 6.5x10⁻³ L = 0.46M NaS₂O₃

Answer:

positive

Explanation:

Explanation:

A proton has positive charge ...

Answer:

Sex

Explanation:

Answer:

Helium is lighter than Hydrogen and Helium is a much safer gas.

Answer:

Helium gas is known to be very light which makes it a preferred choice to hydrogen. Helium has low boiling point, low density, low solubility, high thermal conductivity and inertness. Since it is less dense, it is considered suitable for filling balloons.

Answer:

a) Trichloromethyl

b) Trinitrogen Pentoxide

c) Carbogen

Explanation:

Answer:

Volume is the  dependent  variable, and the

temperature of the gas is the  independent  variable.

Explanation:

Variables Independent Variable: temperature; Dependent Variable: volume

Constants: pressure and number of molecules

"Volume is the variable, and the temperature of the gas is the variable," it means that volume and temperature are both variables in a certain context or scenario.

A variable is a factor or quantity that can change or vary in value. In this case, volume and temperature are the variables being discussed.

Volume refers to the amount of space occupied by a gas. It can be altered by changing the physical conditions of the system, such as adding or removing gas molecules or changing the container size.

Temperature, on the other hand, refers to the measure of the average kinetic energy of the gas molecules. It determines the speed and energy of the gas particles. Temperature can be modified by adding or removing heat from the system.

Both volume and temperature play crucial roles in understanding the behavior of gases, particularly in gas laws such as Boyle's Law, Charles's Law, and the Ideal Gas Law.

Therefore, volume and temperature are being identified as variables that can be independently manipulated or observed to study the behavior of gases or analyze specific gas-related phenomena.

Know more about Boyle's Law:

https://brainly.com/question/21184611

#SPJ2

Your question is incomplete, but most probably your full question was.

"Volume is variable, and the temperature of the gas is variable". Explain this statement.

Answer:

answering what???

Explanation:

Answer:

I answered

Explanation:

Answer:

2-Methyl-5-nitrothiophene  

Explanation:

The 2- and 5-positions of thiophene are the most susceptible to electrophilic aromatic substitution.

Thus, the major product from the reaction of 2-methylthiophene with HNO₃ in acetic acid is 2-methyl-5-nitrothiophene.

Answer:

[tex]m_{undissolved}=27g[/tex]

Explanation:

Hello,

In this case, we first define the solubility as the maximum amount of a solute that is completely dissolved in an specific amount of solvent and it is temperature-dependent. Thus for potassium iodide, its solubility at 30°C is 153 g per 100 cm3 of water, therefore, with the given amount, the undissolved amount results:

[tex]m_{undissolved}=180g-153g=27g[/tex]

Best regards.