GROUP NUMBER
ELEMENT
Potassium
Fluorine
Silicon
Radon
Gold
Beryllium
Oxygen
Neon
Rubidium
Tungsten
Arsenic
Calcium
Sodium
Aluminum
Chromium
Iodine
Helium
Nitrogen
Iron
Zinc

Answer:

HCl is the limiting reactant

Explanation:

To find the limiting reactant of a reaction we must find the moles of each one as follows:

Moles Mg (Molar mass: 24.305g/mol)

4.8g Mg * (qmol / 24.305g) = 0.20 moles Mg

Moles HCl (Molar mass: 36.46g/mol)

6.00g HCl* (1mol / 36.46g) = 0.165 moles HCl

Based on the chemical reaction, for a complete reaction of 0.20 moles of Mg are necessaries:

0.20 moles Mg * (2mol HCl / 1mol Mg) = 0.40 moles HCl

As there are just 0.165 moles of HCl:

Answer:

True

Explanation:

A chemical change is otherwise known as a chemical reaction. A chemical change is characterized by the formation of new substances, evolution of heat and change in chemical composition of substances. The change in the composition of substances during a chemical change is the result of the making and breaking of chemical bonds during a chemical change.

A chemical change is not easily reversible because it involves changes in chemical composition of substances.

An example of a chemical change is the combination of sodium hydroxide and hydrochloric acid according to the reaction equation;

HCl(aq) + NaOH (aq) -----> NaCl(aq) + H2O (l)

We easily notice the change in the chemical composition of each of the substances involved in the reaction.

Answer:

The forest products industry plays a major role in the Swedish economy, and accounts for between nine and 12 percent of Swedish industry's total employment, exports, sales and added value. It includes companies within the pulp and paper industry, as well as the wood-mechanical industry.

Answer:

1 mole = 28.0101

Hence,

82.4 = around 2.8 mole

Have a great day <3

Answer:

mushroom are a type of fungi

Explanation:

Answer:

A

Explanation:

I had this in a test

Answer:

0.06moles/litres

Explanation:

molarity = no of moles / volume in litres = 3.00*10^-2/(450/1000)=0.06 moles/litres

Answer:

0.07mol/dm^3

Explanation:

Please mark as brainliest

Answer:

2Zn2+3O2 ----> 2ZnO+2SO2

Explanation:

Answer: Igneous rocks may be simply classified according to their chemical/mineral composition as felsic, intermediate, mafic, and ultramafic, and by texture or grain size: intrusive rocks are course grained (all crystals are visible to the naked eye) while extrusive rocks may be fine-grained (microscopic crystals) or glass.

Explanation: Hope this helped! :)

Answer:

Igneous rocks may be simply classified according to their chemical/mineral composition as felsic, intermediate, mafic, and ultramafic, and by texture or grain size: intrusive rocks are course grained (all crystals are visible to the naked eye) while extrusive rocks may be fine-grained (microscopic crystals) or glass ( ...

Answer:

There are three types of hydropower facilities: impoundment, diversion, and pumped storage. Some hydropower plants use dams and some do not. The images below show both types of hydropower plants.

Explanation:

Answer:

I can not see the file

Explanation:

Answer:  An electrochemical cell that produces electricity from a spontaneous oxidation-reduction reaction

Explanation:

Galvanic cell is a device which is used for the conversion of the chemical energy produced in a redox reaction into the electrical energy.

Galvanic cell consists of two half cells known as anode and cathode. Oxidation takes place at anode and reduction takes place at cathode. The two half cells are connected by a salt bridge which contains an electrolyte which maintains the electrical neutrality.

Answer:

The crystal field stabilization energy for the octahedral ion hexacyanomanganate(III) , if the wavelength of maximum absorption for the ion is 600 nm is - 1987.59kJ/mole

Explanation:

Lets calculate -:

 Crystal field stabilization energy -

                    [tex]E=\frac{hc}{\pi }[/tex]

   where h = planks constant = [tex]6.626\times10^-^3^4 Js[/tex]

             c= velocity of light = [tex]3\times10^8m/second[/tex]

           [tex]\pi =wavelength=600nm=600\times10^-^9m[/tex]

           [tex]E=\frac{6.626\times10^-^3^4\times3\times10^8}{600\times10^-^9}[/tex]

                =[tex]0.033\times10^-^1^6 J/ion[/tex]

              = [tex]0.033\times10^-^1^6\times6.023\times10^2^3[/tex]

             = [tex]0.198759\times10^7 J/mole[/tex]  = [tex]1987.59\times10^3J/mole[/tex]

             = [tex]1987.59kJ/mole[/tex]

 Thus , the crystal field stabilization energy for the octahedral ion hexacyanomanganate(III) is  1987.59kJ/mole  

Explanation:

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According to the Avogadro's number, there are 3.011×10²³ atoms in 0.5 mole of aluminium.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number, on substituting values in formula, 0.5×6.023×10²³=3.011×10²³ atoms.

Thus, there are 3.011×10²³ atoms in 0.5 mole of aluminium.

Learn more about Avogadro's number,here:

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Answer:

–132.55 °C

Explanation:

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

Initial volume (V₁) = 30.8 L

Initial temperature (T₁) = –67 °C

Final volume (V₂) = 21.0 L

Final temperature (T₂) =?

Next, we shall convert –67 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = –67 °C

Initial temperature (T₁) = –67 °C + 273

Initial temperature (T₁) = 206 K

Next, we shall determine the final temperature of the gas. This can be obtained as follow:

Initial volume (V₁) = 30.8 L

Initial temperature (T₁) = 206 K

Final volume (V₂) = 21.0 L

Final temperature (T₂) =?

V₁/T₁ = V₂/T₂

30.8 / 206 = 21 / T₂

Cross multiply

30.8 × T₂ = 206 × 21

30.8 × T₂ = 4326

Divide both side by 30.8

T₂ = 4326 / 30.8

T₂ = 140.45 K

Finally, we shall convert 140.45 K to celsius temperature. This can be obtained as follow:

T(°C) = T(K) – 273

T₂ = 140.45 K

T₂ = 140.45 K – 273

T₂ = –132.55 °C

Thus, the new temperature of the gas is –132.55 °C

Answer:

yes.

Explanation:

Energy transfer will continue until the objects are at the same temperature. There are 3 ways in which thermal energy can be transferred from one object/substance to another, or from a system to its surroundings: Conduction. Convection.

All materials do not respond to heat in the same way because every material is made up of different arrangements of atoms and different substances, and different substances respond differently when reacting with heat.

Heat is a form of energy that is produced by the burning of something. It is thermal energy that increases the warmth of a body or an atmosphere.

As long as the objects are not at the same temperature, energy transfer will continue. Three methods exist for transferring thermal energy from one thing or thing to another, or from a system to its surroundings: Conduction. Convection.

Thus, because each material is made up of a unique combination of atoms and substances, and because each substance reacts to heat in a unique way, no two materials react to heat in the same way.

To learn more about heat, refer to the below link:

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Answer:

Farenheit

Explanation:

STP is used to measure standard temperature and pressure -- it uses Kelvin for temperature, not Farenheit.

Answer:

True

Explanation:

Answer:No, the Cell Membrane does I'm pretty sure

Explanation:

Answer:

its a option neutralization takes place between acid and base plz mark me branliest

Answer:

The answer is definitely D

Explanation:

Answer:

The heat of reaction is basically the energy that is being released and or absorbed when chemicals are transformed in a type of chemical reaction. However, the heat of reaction or also called reaction enthalpy is mostly or typically expressed as a molar enthalpy in kJ/mol and or as just a specific enthalpy in kJ/kg or kJ/L.

Answer is in the photo. I can only upload it to a file hosting service. link below!

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Answer: compressibility

Explanation:

The ratio of the measured molar volume of a real gas to the measured molar volume  of an ideal gas is known as​ compressibility.

Compressibility is defined by the symbol Z and is calculated by the formula :

[tex]Z=\frac{PV}{nRT}[/tex]

For a gas with ideal behavior, molar volume of an ideal gas is equal to the molar volume of a real gas so Z= 1.

Answer:

C）52g KCl in 100g water at 80°C

Explanation:

A saturated solution is one that contains as much solute as it can dissolve in the presence of excess solute at that particular temperature.

A solutibility curve is a graph that shows the variability with temperature of the solubility of a solute in a given solvent. A solutibility curve can provide information of whether a solution formed frommthe solute and solvent are saturated or not at a given temperature.

From the solubility curve in the attachment below:

A) A saturated solution of NH₄Cl will contain about 52 g solute per 100 g sat 50 °C. Thus, a solution of 40 g NH₄Cl in 100 g water at 50 °C is an unsaturated solution.

B) A saturated solution of SO₂ at 10°C will contain about 70 g of solute in 100 g of water. Thus a solution of 2g SO₂ in 100g water at 10°C is an unsaturated solution.

C) A saturated solution of KCl at 80 °C will contain about 52 g of solute in 100 g of water. Thus, a solution of 52g KCl in 100g water at 80°C is a saturated solution.

D) A saturated solution of Kl at 20 °C will contain about 145 g of solute in 100 g of water. Thus, a solution of 120g KI in 100g water at 20°C is an unsaturated solution.