The magnesium reacts with the hydrochloric acid to produce a gas and a salt.​

Answer:

This is because Corn is grown on land and has important values to man .These values include as a source of food for man and animals. It is also used as raw materials for the production of certain goods such as flour etc.

It is an energy resource because fermentation of corn gives rise to ethanol fuel which is used as a source of power to run machines and other equipment.

Answer:

higher temperatures increase the speed of solubility

Explanation:

This is because if the temperature of liquid is high and you place a solute inside it dissolves faster than a low temperature

Higher temperature increases the speed of solubility affect the speed with which the solute dissolves. Therefore, option A is correct.

The term solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specific temperature.

Based on the concentration of solute dissolves in a solvent, solutes are divided into highly Soluble, sparingly Soluble or insoluble substance.

When a solvent is heated, the molecules gain kinetic energy. Because of the increased rapid motion, the solvent molecules collide with the solute more frequently and with greater force. Both factors accelerate the solute's dissolution.

This is because if the temperature of the liquid is high and a solute is placed inside, the solute dissolves faster than if the temperature is low.

Thus, option A is correct.

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Answer:

Hydrogen bonding

Explanation:

Hydrogen bonding is the intermolecular force that would affect melting point the most. Therefore, the correct option is option B.

The electro - magnetic forces of attraction but rather repulsion that act between atoms or other types of nearby particles are examples of intermolecular forces, which mediate interaction between molecules. When compared to intramolecular forces, which include covalent bonds and other forces that hold molecules together, these forces are weaker.

The intermolecular force, which depends on the kinetic energy between atoms as well as the tiny electrically charged positive and negative charges on various sections of a molecule, is the total of all the forces connecting two nearby molecules. Hydrogen bonding is the intermolecular force that would affect melting point the most.

Therefore, the correct option is option B.

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Answer:

The different objects that make up a circuit are called components. A circuit must have a power source, such as a battery, and the current flows through a conductor, such as a wire.

Explanation:

I hope that was useful.

Answer:all

Explanation:

Because a reaction does not starts by itself unless some force is applied

Answer:

1x10^-8 M

Explanation:

Since the solution turns blue, it mean the solution is a base.

Now, to know which option is correct, we need to determine the pH of each solution. This is illustrated below:

1. Concentration of Hydrogen ion, [H+] = 1x10^-2 M

pH =..?

pH = - log [H+]

pH = - log 1x10^-2

pH = 2

2. Concentration of Hydrogen ion, [H+] = 5x10-2 M

pH =..?

pH = - log [H+]

pH = - log 5x10^-2

pH = 1.3

3. Concentration of Hydrogen ion, [H+] = 5x10 M

pH =..?

pH = - log [H+]

pH = - log 5x10

pH = - 1.7

4. Concentration of Hydrogen ion, [H+] = 1x10-8 M

pH =..?

pH = - log [H+]

pH = - log 1x10^-8

pH = 8

A pH reading shows if the solution is acidic or basic. A pH reading between 0 and 6 indicates an acidic solution, a pH reading of 7 indicates a neutral solution while a pH reading between 8 and 14 indicates a basic solution.

From the above calculations, the pH reading indicates a basic solution when the hydrogen ion concentration was 1x10^-8 M.

Answer:

a. 0.02 moles  of NH₃, 0 moles of O₂, 0.08 moles of NO, 0.12 moles of H₂O

b. [tex]P_{NH_3}[/tex] = 12,576.5 Pa, [tex]P_{NO}[/tex] = 50,306.05 Pa, [tex]P_{H_2O}[/tex] =  74,459.1 Pa

c. The total pressure is 138,341.64 Pa

Explanation:

a. NH₃ + O₂  → NO + H₂O

The balanced chemical equation is first found to be

4NH₃ + 5O₂  → 4NO + 6H₂O

Therefore, we have;

4 moles of NH₃ reacts with 5 moles of O₂ to form 4 moles of NO and 6 moles H₂O

Dividing by the reactant with the highest number of moles which is 5 moles of oxygen gives;

4/5 moles  of NH₃ reacts with 5/5 moles of O₂ to form 4/5 moles of NO and 6/5 moles H₂O

Which is the same as 4/5 moles  of NH₃ reacts with 1 mole of O₂ to form 4/5 moles of NO and 6/5 moles H₂O

Multiplying by 0.100 gives;

0.1×4/5 moles  of NH₃ reacts with 0.1 mole of O₂ to form 0.1×4/5 moles of NO and 0.1×6/5 moles H₂O

The quantity of each gas in the container upon completion of the reaction is therefore;

(0.1 - 0.1×4/5) = 0.02 moles  of NH₃

0 moles of O₂

0.08 moles of NO

0.12 moles H₂O

b. Given that the temperature = 105°C, we have;

PV = nRT

P = nRT/V

Where:

n = Total number of moles = 0.02 + 0.08 + 0.12 = 0.22 moles

R = Universal gas constant = 8.3145 J/(mol·K)

T = Temperature = 105°C = 378.15 K

V = Volume = 5 litre = 0.005 m³

P = 0.22×8.3145×378.15/0.005 = 138,341.64 Pa

From Dalton's law of partial pressure, we have;

Partial pressure Pₓ = Xₓ × P

Where:

Xₓ = Mole fraction

Which gives for ammonia NH₃ with 0.02 moles;

Mole fraction = 0.02/0.22 = 1/11

[tex]P_{NH_3}[/tex] = 1/11 × 138,341.64  = 12,576.5 Pa

For the 0.08 moles of NO, we have

Mole fraction = 0.08/0.22 = 4/11

[tex]P_{NO}[/tex] = 4/11 × 138,341.64  = 50,306.05 Pa

For the 0.12 moles H₂O

P = 0.12×8.3145×378.15/0.005 = 74,459.1 Pa

Mole fraction = 0.12/0.22 = 6/11

[tex]P_{H_2O}[/tex] = 6/11 × 138,341.64  = 74,459.1 Pa

c. The total pressure = 12,576.5 Pa + 50,306.05 Pa + 74,459.1 Pa = 138,341.64 Pa.

Answer:

0.56M es la concentración de la solución restante

Explanation:

La molaridad de una solución es una unidad de concentración definida como la relación entre las moles de soluto (En este caso, dicromato de potasio) y el volumen de la solución.

Sabiendo que para el ion dicromato:

6M = 1N

La normalidad del ion dicromato se obtiene dividiendo entre 6 su molaridad.

Moles de dicromato en las dos soluciones son:

1. 0.250L × (1.24mol / L) = 0.310 moles de dicromato

2. 0.380L × (0.65eq / L) × (1eq / 6mol) = 0.042 moles de dicromato

Así, las moles totales de dicromato de potasio son:

0.310moles + 0.042 moles = 0.352 moles de dicromato

En un volumen de 250mL + 380mL = 630mL = 0.630L

La molaridad de la solución es:

0.352 moles / 0.630L =

Answer:

64.9 L

Explanation:

pls mark as brainliest

Answer:

The outermost shell of helium for example is filled with only two electrons. Hydrogen and lithium become stable by acquiring the electronic configuration of the nearest inert gas, which is helium. This is the duplet (or duet) rule.

Explanation:

Monomers and polymers

Most large biological molecules are polymers, long chains made up of repeating molecular subunits, or building blocks, called monomers.

The long chains formed by the process of polymerization are called monomers.

In biological macromolecules, polymerization is the chemical process through which relatively tiny and smaller molecules, known as monomers, unite to form a very big chainlike or network of molecules known as a polymer.  

These monomers undergo reactions with one another to form larger molecules known as polymers. The types of monomers in biological macromolecules include:

Each of these individual monomers is critical to the survival and evolution of life.

Therefore, we can conclude that the long chains formed by the process of polymerization are called monomers.

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Answer:

Troposphere

Explanation:

The troposphere is the lowest layer in the atmosphere, and where all the weather occurs. After the troposphere, there's the stratosphere, mesosphere, thermosphere, and exosphere.

I hope this helps!

Answer:

Troposphere is the lowest layer of the earths atmosphere.

Explanation:

Answer:

Ozone

Explanation:

The ozone layer protects the UV rays and also theres a hole in it near antarica which is causing global warming!

Off topic sorry lol:P

I hope this helps i got the answer correct

Remember to mark brainliest

Answer:

B

Explanation:

Option be is the only molecular structure with 4 carbon molecules and 10 hydrogen molecules

Answer:

reactants : before arrow sign

: CH4 and O2

product : after arrow sign

: CO2 and H2O

the answer is the second option

Answer:

Na2SO3 + H2O2 = Na2SO4 + H2O

The ionic equation of hydrogen peroxide reacting with sodium sulphide is Na₂SO₃ + H₂O₂ = Na₂SO₄⁻ + H₂O⁺.

A chemical equation known as an ionic equation expresses the constituents in an aqueous solution as dissociated ions. The ionic equation is written by using charge in them.

An example is  "NaCl" is "Na⁺ + Cl⁻".

To write an ionic equation, we should write by dissolving all soluble ionic chemicals into their corresponding ions. To demonstrate that an ion is present in the solution, it should be displayed with its charge and an (aq).  There is also a use of coefficient.

The reaction should be written as:

HS₂O₄ → 2H+ + (SO₄)²⁻

NaOH → Na+ + (OH)-

Na₂SO₄ → 2Na+ + (SO₄)²⁻

H2O exists in the molecular form

So we get 2H+ + (SO₄)²⁻ + 2Na+ + 2(OH)- →2Na+ + (SO₄)²⁻ + 2H₂O

Thus, the ionic equation is Na₂SO₃ + H₂O₂ = Na₂SO₄ + H₂O.

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Answer:

Vibration.

Explanation:

Answer:

vibration best describes it

Explanation:

Explanation:

96.485 columbs=1 faraday will

deposit 64/2g= 32 g cu ion

therfore it will require

96,485 ×2/32 =? coulombs or 1/16 of

Faraday= 1 / 16 mole of electrons .

Answer:

0.84kg of gatorade powder

Explanation:

From the question given, we were told that 0.6kg of gatorade powder required 5 gallons of water.

To obtain the mass of gatorade needed for 7 gallons of water, we simply do the following:

0.6kg of gatorade powder required 5 gallons of water.

Therefore, xkg of gatorade powder will require 7 gallons of water i.e

xkg of gatorade powder = (0.6 x 7)/5

xkg of gatorade powder = 0.84kg

Therefore, 0.84kg of gatorade powder will be required.

Answer:

The advantages of the pig's heart over the heart formed by the stem cells is that they come in many size so it is possible to have heart for every age group of people.

There are less chances of rejection as pigs also are mammals and moreover there will be no ethical issues as such because a huge number of pigs are slaughtered everyday for human consumption and if their heart can be used for some beneficial purpose it would be good cause.

The risks related to stem cell transplantation includes tumour formation, rejection of the transplanted stem cells, infection and haemorrhage which can be quite risky for the patients.

It is not that pig's heart is always acceptable but the chances are less as compared to stem cell.

Answer:

0.54 J/goC

Explanation:

Recall that we define the heat transferred as ;

H= mcθ

Where;

H= heat transferred = 112300J

m= mass of the metal= 240g or 0.24 Kg

c= specific heat capacity of the metal = the unknown

θ= change in temperature = (880°C-13°C) = 867°C

Substituting values and making the specific heat capacity the subject of the formula;

c= H/mθ

c= 112300/ 240×867

c= 0.54 J/goC

Hence, the specific heat capacity of the metal is 0.54 J/goC.

Answer:

114

Explanation:

bottom number minus top number. just did the test

Answer:

54°C

Explanation:

Hello,

To find the temperature of the gas, we would need a relationship between kinetic energy and temperature.

K.E = 3/2RT/Na

Where K.E = kinetic energy

R = ideal gas constant

T = temperature of the ideal gas

Na = Avogadro's number

2K.E₁ = K.E₂ (required)

Since both constant (R and Na) are equal,

K.E = T (direct proportionality)

But T = 27°C

T2 = 2 × 27 = 54°C

To double the kinetic energy of a helium gas at 27°C the temperature of the gas should be increased to 54°C

Answer:

3,5-dimethyl-2-octene

Explanation:

The parent chain will be choosen based on the highest value. In this case, if we count from top to bottom, we'll get seven carbon, however if we count from the second carbon, going left and then down, we'll get eight carbon. So the parent chain is octene

The double bond is located at the second carbon and the methyl groups are located on carbon 3 & 5. Since there are two methyl groups, we add di- in front of methyl to indicate two methyl groups present.

Note: The functional group has to be prioritise and it needed to be a part of the parent chain. In this case, the functional group is the double bond. (alkene)

Answer:

A. AgNO3

I hope it's helps

Answer:

Approximately [tex]-205.7\; \rm kJ[/tex].

Explanation:

This question can be solved using Hess's Law.

Start by considering: how can the first three reactions (with known [tex]\Delta H[/tex] values) be combined to produce the reaction [tex]\rm CH_4\; (g) + 4\; \rm Cl_2\; (g) \to CCl_4\; (g) + 4\; HCl\; (g)[/tex]?

Here's one possible combination:

In other words, if [tex](1)[/tex], [tex](2)[/tex], and [tex](3)[/tex] denote the three reactions with know [tex]\Delta H[/tex] values, respectively, then [tex]1 \times (1) - 1 \times (2) + 2\times (3)[/tex] will give the required reaction [tex]\rm CH_4\; (g) + 4\; \rm Cl_2\; (g) \to CCl_4\; (g) + 4\; HCl\; (g)[/tex].

By Hess's Law, the [tex]\Delta H[/tex] value of the reaction [tex]\rm CH_4\; (g) + 4\; \rm Cl_2\; (g) \to CCl_4\; (g) + 4\; HCl\; (g)[/tex] will thus be:

[tex]\begin{aligned}&1 \times \Delta H_1 - 1\times \Delta H_2 + 2\times \Delta H_3\\ &= 1 \times 74.6\; \rm kJ - 1 \times 95.7\; \rm kJ +2 \times (-92.3\; \rm kJ) \\ &= -205.7\; \rm kJ\end{aligned}[/tex].

vice versa: atoms are elements, so elements are made of atoms specifically 1 atom or multiple of the same kind