Write a balanced chemical equation for Na2CO3 reacting with MgCl2*6H2O

Answer:

When the electrons in the atom are excited, for example by being heated, the additional energy pushes the electrons to higher energy orbitals. When the electrons fall back down and leave the excited state, energy is re-emitted in the form of a photon

Explanation:

The reaction listed below will Gibbs free energy always be negative is an endothermic reaction that increases in entropy. The correct option is C.

Gibbs free energy in thermodynamics is used to calculate the total amount of energy that can be used in doing work in a thermodynamically closed system within a constant temperature and pressure.

\(\Delta G=\Delta H-T \Delta S\)

Endothermic reactions are those reactions in which the energy is saved and doesn't go out into the environment and the thermodynamic system is closed, and the entropy will be increased therefore the delta G will be negative.

Thus, the correct option is C. An endothermic reaction that increases in entropy regarding when Gibbs free energy always is negative.

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Answer: An exothermic reaction that increases in entropy

Explanation:

• There is gunpowder inside the packets of fire works that causes the explosions when in contact with open flame.

• fireworks are packed with careful combinations of chemicals such as ,potassium nitrate, (saltpeter),, sulphur,, and ,charcoal.

• Different colours are made by mixing different chemicals such as, ,Calcium,Strontium, Barium,Boron, Alumiinum, Copper and Sodium.

• These are the chemicals that you can predict to find in the 4th of July Magical flames .

Answer:

B. a covalent bond.

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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The number of moles of gas produced from the reaction of 2.00g of potassium with an excess amount of water is 0.025 moles.

The reaction of potassium with an excess amount of water is:

2K + 2H\(_2\)O \(\rightarrow\) 2KOH + H\(_2\)

To calculate the moles of hydrogen gas first we need to calculate moles of potassium in 2.00g

No. of moles = (mass) / (molecular mass)

The mass given is 2.00 g and the Molecular mass is 39.09 units

∴ No. of moles = (2) / (39.09) = 0.05

From the above reaction, we get that 2 moles of potassium give 1 mole of hydrogen gas. Thus, 0.05 moles of potassium gives 0.025 moles of hydrogen gas.

Therefore, the no. of moles of hydrogen gas produced is 0.025 moles.

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Answer:

don't get the question2

Answer:

36 L

Explanation:

Step 1: Given data

Step 2: Calculate the volume of the first container

If we assume ideal behavior and constant temperature, we can calculate the volume of the first container using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₁ = P₂ × V₂ / P₁

V₁ = 17 kPa × 15 L / 7 kPa = 36 L

Answer:

empirical formula = CH2O

molecular formula = C2H4O2

We have that  the correct wedge and dash conformation for the following Newman projection is

IV

From the Diagrams above

Two CH_3 groups points on opposite sides in plane

Two Br are on same side  of plane

Two H also on same side of the plane so the plausible  structure is IV

Therefore

The Correct option is IV

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Answer:

You forgot to add a screenshot buddy.

Explanation:

Answer: I think the answer is C)

Explanation:

Solute = vitamin C

Solvent = water

If the metal was not heated long enough, the calculated specific heat of the metal will be different from then measured specific heat capacity of the metal, and there will be error in measurement of the specific heat capacity of the metal

The specific heat capacity of a metal is the quantity of heat required to raise the temperature of a unit mass of the metal by 1 kelvin.

The heat capacity of a metal and its specific heat capacity is given by the following formula.

Q = mcΔθ

c = Q/mΔθ

where;

When a metal is heated for a long period of time, it acquires thermal energy which causes its temperature to increase.

As the temperature of the metal increases, the difference in temperature of the metal increases as well. The increase in the temperature difference of the metal causes a decrease in the specific heat capacity of the metal.

However, if the metal was not heated long enough, the difference in temperature of the metal will be small and the value of the specific heat capacity will increase.

When the value of the specific heat capacity increases, it will be different from the calculated specific heat of the metal and cause error in measurement of specific heat capacity of the metal.

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Answer : The correct answer is option (3) \(5.68\times 10^{-19}J\)

Explanation: Given,

Wavelength =  350 nm = \(350\times 10^{-9}m\)         \((1nm=10^{-9}m)\)

Now we have to determine the energy of photon.

Formula used:

\(E=\frac{hc}{\lambda}\)

where,

E = energy  of photon

h = Planck's constant =  \(6.63\times 10^{-34}J.s\)

c = speed of light =  \(3\times 10^{8}m/s\)

\(\lambda\) = wavelength of photon

Now putting all the given values in this formula, we get:

\(E=\frac{(6.63\times 10^{-34}J.s)\times (3\times 10^{8}m/s)}{350\times 10^{-9}m}\)

\(E=5.68\times 10^{-19}J\)

Therefore, the energy of photon is, \(5.68\times 10^{-19}J\)

The Medal of Honor is the best navy decoration and highest volume.

The President of the USA The Victoria go is the holy grail for Medal of Honor creditors because there are the best in lifestyles. Bearing the inscription For valor and called a VC, this medal turned into first offered for conspicuous bravery' in 1856 and later backdated to the Crimean conflict of 1854. The outstanding service pass is the second maximum army ornament that may be provided to a member of the American military, for intense gallantry and risk of lifestyle in actual combat with an armed enemy force.

The Bronze Star Medal dates lower back to world battle II. these days, it is the fourth-maximum ranking award a provider member can obtain for a heroic and meritorious deed performed in an armed battle. For individuals who acquire the BSM, it's far a sign of their sacrifice, bravery, and honor at the same time as serving their us of a

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In the formation of the sodium chloride, there is the loss of one electron from the sodium atom to the chlorine atom.

An ionic bond is the kind of bond that is formed between a metal and a non metal. The metal is known to donate electrons to the non metal. In the actual sense, the compound that is formed is an ion pair because the metal is positively charged while the non metal is negatively charged.

In the case of the sodium chloride, we know that the both elements, sodium and chlorine are highly reactive. Hence the sodium atom would quickly loose electrons to the chlorine atom and then the sodium chloride compound is formed.

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Answer:

•Molecular formula = emprical formula × n

•n= Molar Mass÷ Emprical formula mass

===========

Given Molar Mass= 39g

Emprical formula mass of CH =12+1= 13 g

-> n = 39 / 13

=3

Now Molecular formula= emprical formula × n

=CH × 3

=C3H3

Because oil lacks a charge and is not drawn to the polar water molecules, it is a nonpolar material.

The more prevalent soluble contaminants are organic matter, sodium chloride, sodium sulphate, sodium carbonate, magnesium chloride, calcium chloride, calcium sulphate, and calcium bicarbonate. Sand, clay, and organic materials are some common examples of insoluble impurities.

Solids that may create a solution when combined with the appropriate liquid are said to be soluble (or soluable) solids. Because of this, the soluble substances in the liquid (such as water, oil, kerosene, etc.) dissolve. such as sugar and water or salt and water. Solids that do not dissolve in water are known as insoluble solids.

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The rate of disappearance in chemistry describes how quickly a reactant is used up or vanishes during a chemical reaction. \(C_{O} 2\)therefore appears at a rate of 0.26 Ms-1.

O2 and CO combine to generate \(C_{O} 2\) according to a balanced equation: 2CO + O2 2CO2.

The balanced equation's stoichiometry states that 2 moles of \(C_{O} 2\) are created for every 1 mole of oxygen consumed. Thus, the rate of \(C_{O} 2\) emergence is twice as fast as the rate of O2 extinction.

If O2 dissipates at a rate of 0.13 Ms1, then \(C_{O} 2\) appears at a rate of 0.13 Ms1 x 2 = 0.26 Ms1.

\(C_{O} 2\) therefore appears at a rate of 0.26 Ms-1. This is frequently determined by tracking the reactant's concentration over time and using the equation to get the rate of change in concentration.

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The heat energy required to boil 75.25 g of ethanol is 62.1775 kJ.

To calculate the heat energy required to boil 75.25 g of ethanol, we need to use the formula:
Q = m × ΔHvap

Where Q is the heat energy required, m is the mass of ethanol, and ΔHvap is the heat of vaporization for ethanol.
Substituting the given values into the formula, we get:
Q = 75.25 g × 0.826 kJ/g
Q = 62.1775 kJ

This means that we need to supply 62.1775 kJ of heat energy to the ethanol to convert it from a liquid to a gas. The heat of vaporization is a measure of how much heat energy is required to break the intermolecular forces between the molecules of a liquid and convert it to a gas at a constant temperature. In the case of ethanol, it takes 0.826 kJ of heat energy to vaporize one gram of the liquid.

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The ions of Noble gases, group VIII elements have a full octet configuration on their outermost shell and as such are highly stable.

The periodic table is a systematic arrangement of elements in order of their atomic numbers into a set of 8 columns each called groups and a set of 7 rows each called a period.

Elements are arranged in different groups according to the number of Valence electrons they have.

The same is evident in group 7 elements are highly electronegative and have high electron affinity and as such are unstable and reactive.

Consequently, the Noble gases ion has a stable Valence electron configuration.

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In the given reaction, the limiting reactant is hydrogen gas. 3 moles of hydrogen gas produces 2 moles of ammonia, thus 9 moles will produce 6 moles of ammonia that is equal to 102 g.

Ammonia is an inorganic gas formed by the combination of nitrogen gas and hydrogen gas. The balanced chemical equation for the reaction is written below:

\(\rm N _{2} + 3 H_{2} \rightarrow 2 NH_{3}\)

As per the given reaction, hydrogen gas is needed more in this reaction, and it is the limiting reactant which determines the product yield. Here, 3 moles of hydrogen gas produces 2 moles of ammonia. Thus, 9 moles of hydrogen gas produces:

(9 × 2) / 3 = 6 moles.

Molar mass of ammonia = 17 g/mol

Thus mass of 6 moles = 17 g/mol × 6 moles = 102 g.

Therefore, the largest amount of ammonia that can be produced from 9 moles of hydrogen gas is 102 g.

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Answer:

P + O2 --> P2O5

Explanation:

For a simple match burning you can use the following equation: P + O2 --> P2O5 To balance the reaction you have to make sure you have the same amount of each element on both sides.

Answer: 0.725g

Explanation: mass = (5.83*10^21/6.02214076*10^23)*74.92 g = 0.725 g

The molarity of a 0.5 liter solution that contains 3.84 moles of NaCl would be 7.68 M.

Molarity is simply the ratio of the number of moles of solutes per liter volume of a solution.

In other words, molarity is a measure of the concentration of a solute in a solution. It is commonly denoted by the symbol "M" and expressed in units of mol/L.

Molarity = mole/volume

Where the volume is in liters.

In this case:

Molarity of the NaCl solution = 3.84/0.5

                                                = 7.68 M

Thus, the molarity of a 0.5 Liter solution that contains 3.84 moles of NaCI is 7.68 M.

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Answer:

The answer is cytoplasm and the nucleus

Explanation:

Answer:

nucleus

Explanation: