The total mass of the reactants is equal to the total mass of products. this is known as the conservation of what?

Communication skills were developed so knowledge could be passed along to younger generations.

Knowledge will pass from one generation to another with the help of education. The skill people give education to their youngers about fire and tools. In this way, skills of fire and tools pass from one generation to another.

So we can conclude that communication skills were developed so knowledge could be passed along to younger generations.

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Answer:

A

Explanation:

Answer:

O2 is limiting reactant

Explanation:

4 x Al = 107.924 gm

6 x O  = 95.994  gm

     you need ALMOST as many grams of O2 as Aluminum....

          you are short of O2  <======the limiting reactant

Answer:

electrolytic cell

Explanation:

Electrolytic cell used electrical energy to do electrolysis.

Then by using oxidation and reduction ions produced it does produce chemical changes

Option A

Answer:

falso

Explanation:

tiempo no determinado El circulation de elctrones

Answer: 1/12

Explanation:

A carbon-12 atom has a mass of 12 amu, so multiplying this by 1/12, we get 1 amu.

Answer:

5.158 mol/L

Explanation:

To find the molarity, you need to use the formula:

Molarity (M) = moles / volume (L)

You have been grams sodium carbonate. You need to (1) convert grams Na₂CO₃ to moles (via molar mass), then (2) convert moles Na₂CO₃ to moles HCl (via mole-to-mole ratio from equation), then (3) convert mL to L (by dividing by 1,000), and then (4) use the molarity equation.

Steps 1 - 2:

2 HCl + 1 Na₂CO₃ ----> 2 NaCl + H₂O + CO₂

6.5287 g Na₂CO₃         1 mole            2 moles HCl
--------------------------  x  -------------  x  -------------------------  =  0.12318 mole HCl
                                      106 g           1 mole Na₂CO₃

Step 3:

23.88 mL / 1,000 = 0.02388 L

Step 4:

Molarity = moles / volume

Molarity = 0.12318 mole / 0.02388 L

Molarity = 5.158 mole/L

**mole/L is equal to M**

Cyclohexenone is a useful starting material for drug synthesis. For each reaction. The major additional product for the reactions are respectively given as;

This is further explained below.

Generally, An electrophile is simply defined as a species of a chemical compound that may receive an electron pair from a carbonyl group in order to establish chemical bonds.

In conclusion, It is common practice to add 1,4 significance to the alkene of asymmetric nucleophiles when using organocuprate reagents in the process at the top.

Grignard reagents often add 1,2 to the carbonyl of asymmetric carbonyl compounds in the bottom reaction

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Cyclohexenone is a useful starting material for drug synthesis. For each reaction. The major additional product for the reactions are respectively given as;

A soft electrophile

A hard electrophile

Generally, An electrophile is simply defined as a species of a chemical compound that may receive an electron pair from a carbonyl group in order to establish chemical bonds.

In conclusion, It is common practice to add 1,4 significance to the alkene of asymmetric nucleophiles when using organocuprate reagents in the process at the top.

Grignard reagents often add 1,2 to the carbonyl of asymmetric carbonyl compounds in the bottom reaction

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The amount, in mL, of the concentrated acid required, would be 1.1875 mL

From the dilution equation:

m1v1=m2v2 where m1 and m2 = molarity before and after dilution, and v1 and v2 = volume before and after dilution.

m2 = 0.285M, m1 = 12.0M v2 = 50.0 mL

v1 = m2v2/m1 = 0.285x50/12 = 1.1875 mL

Thus, 1.1875 mL of the acid would be taken and diluted with water up to the 50 mL mark.

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Linking monomers together to form a polymer .This chemical reaction also forms water molecules.

This is a type of reaction which involves the linking of two or more monomers to form a polymer.

Dehydration reaction forms water molecules as part of the product thereby making it the most appropriate choice.

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Answer:

d the average kinetic energy of the particles

Answer:

C

Explanation:

Because NH3 has 8 valence electrons, and Hydrogen can only have 1 bond

The dead battery with a percentage composition of 70.0% Mn and 30.0% O has the empirical formula Mn₂O₃.

An empirical formula is the minimal relationship between the atoms in a chemical formula.

A dead alkaline battery is 70.0 % Mn and 30.0 % O. To find the empirical formula, we will divide each percentage by the molar mass of the element.

Then, we divide both numbers by the smallest one.

Finally, we multiply both numbers by 2 so that they are whole numbers.

The empirical formula of the compound is Mn₂O₃.

The dead battery with a percentage composition of 70.0% Mn and 30.0% O has the empirical formula Mn₂O₃.

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The grams of SO₂ that would be dissolved in 100 g of 40 degree water to make a saturated solution can be calculated by making solubility curve.

Mass is the quantity of matter of a physical body.

If you want to calculate the mass of Sulfur dioxide in 100 g of 40 degree, you have to make a solution curve.

With the increase in temperature, the solubility increases as well

Thus, the grams of SO₂ that would be dissolved in 100 g of 40 degree water to make a saturated solution can be calculated by making a solubility curve.

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[tex]PO_4^{-3}[/tex] and [tex]NH^{4+}[/tex] are polyatomic anions composed of two or more atoms.

A polyatomic ion is an ion composed of two or more atoms. Examples: The hydroxide cation ([tex]OH^-[/tex]) and the phosphate cation ([tex]PO_4^{3-}[/tex]) are both polyatomic ions.

[tex]PO_4^{-3}[/tex] and [tex]NH^{4+}[/tex] are the polyatomic anions because both contain more than 1 atom.

Hence,[tex]PO_4{-3}[/tex] and [tex]NH^{4+}[/tex] are polyatomic anions composed of two or more atoms.

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Answer:

What happens when a piece of hot metal is dropped in room temperature water. Over time the metal will cool and the water will heat up. Eventually the two objects will have the same temperature. They are then said to be in thermal equilibrium with one another.

Explanation:

i hope this helps you!!

Answer:

See below ~

Explanation:

The respective pairs are :

× Ribose ⇒ The sugar of RNA

× Double helix ⇒ Structures of DNA

× Watson & Crick ⇒ Proposed the double helix model

× Base pair ⇒ Adenine - Thymine pair

× Cytosine ⇒ The nucleotide pair of Guanine

Answer:

convert the 25.13 g of Fe2O3 into moles by dividing by its molar mass (159.69) to get that. When looking at the stoichiometric coefficients, we can see that for every 1 mole of Fe2O3, there needs to be 3 moles of CO.

Explanation:

Answer: (2)

Explanation:

There are 16 oxygen atoms on the reactant side but only 10 on the products side.

Taking into account the reaction stoichiometry, 2 moles of CaO are required to react with 2 moles of Ca(OH)₂.

In first place, the balanced reaction is:

CaO + H₂O → Ca(OH)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: If by stoichiometric reaction 1 mole of Ca(OH)₂ is produced by 1 mole of CaO, 2 moles of Ca(OH)₂ are produced by how many moles of CaO?

[tex]moles of CaO=\frac{2 moles of Ca(OH)_{2}x1 mol of CaO }{1 mole of Ca(OH)_{2}}[/tex]

moles of CaO= 2 moles

Finally, 2 moles of CaO are required to react with 2 moles of Ca(OH)₂.

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Answer:

See explanation.

Explanation:

Are you literally posting your entire you chemistry homework on this site, one question at a time? Anyways, the heat death refers to the second law of thermodynamics and entropy. Heat is constantly flowing from warmer to cooler objects and never the other way around. This heat flow increases entropy, which is constantly increasing. The universe will eventually disperse all of its heat energy away to continuously increase entropy and reach a limit as the temperature reaches 0 K at which point all molecular motion will cease and so will the life of the universe.

Answer:

hypothesis on the ultimate fate of the universe, which suggests the universe would evolve to a state of no thermodynamic free energy and would therefore be unable to sustain processes that increase entropy.

Explanation:

The atomic radii of the atoms in the group 1 increases down the group as we go from Hydrogen to Francium.

The total distance from the nucleus of an atom to the outermost orbital of its electron is known as its atomic radii or atomic radius.

As we go down the group, the number of orbits or shell increases.

Hence, atomic radii of the atoms in the group 1 increases down the group as we go from Hydrogen to Francium.

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The reaction that takes place in a nuclear fission reactor is as follows: 235/92 U + 1/0n 94/36Kr + 139/56 Ba + 3/0n.

A nuclear fission reactor is the place where nuclear chain reactions occur that produce energy by fission.

Nuclear fission is the nuclear reaction in which a large nucleus splits into smaller ones with the simultaneous release of energy.

Therefore, the option that involves the splitting of atoms into smaller ones is as follows: 235/92 U + 1/0n 94/36Kr + 139/56 Ba + 3/0n.

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[tex]~~~~~\text{pH} + \text{pOH} = 14\\\\\implies \text{pOH} = 14- \text{pH}\\\\\implies \text{pOH} = 14 - 11.8\\\\\implies \text{pOH} = 2.2\\\\\text{Now,}\\\\~~~~~~~\text{pOH}= -\log\left[\text{OH}^{-1}\right]\\\\\implies \left[\text{OH}^{-1} \right] = 10^{-\text{pOH}} = 10^{-2.2}~ = 0.006309~M\\\\\text{Hence the concentration of OG}^{-1}~ \text{is 0.006309~M}[/tex]

Kinetic energy in different forms occurred from the falling water that turned the generators at the dam to the hot air that was produced from your hair dryer this morning.

Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

Kinetic energy (water) to electric energy (dam) as the hydroelectric dam works.

Then, as the current travels from the plant to your crib, electric energy to heat energy (wire resistance).

Then, when you are using the dryer electric energy to heat energy (hot air) and sound energy (air particles vibrate due to the heat energy).

Therefore, Kinetic energy in different forms occurred from the falling water that turned the generators at the dam to the hot air that was produced from your hair dryer this morning.

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Answer:

3-methyl pentane

Explanation:

The longest chain of carbons is 5, so it will have the prefix pent-.

The first branch is on the 3rd carbon, and it is a 1 carbon branch. This means the branch will be called 3-methyl.

Now to find the suffix we need to count the carbons and the hydrogens. There are 6 carbons and 14 hydrogens, which follows the formula for an alkane ([tex]C{_n}H{_{n+2}}[/tex]). This gives it the suffix -ane.

Now we can name the compound:

3-methyl pentane

That is the answer

- Kan Academy Advance

Answer:

bottom :)

Explanation:

Question: How Many Protons, Neutrons, And Electrons Are In A Neutral Atom Of Copper, Cu, With An Atomic Number Of 29 And Mass Number Of 64? A. Protons = 64, Neutrons = 29, Electrons = 29 B. Protons = 35, Neutrons = 29, Electrons = 35 C.

The statements which best describe beta decay are: option 1, 2 and 4.

A beta particle can be defined as an isotope which typically undergoes radioactive decay through the emission of a radiation with a -1 charge.

Based on scientific information and records from radioactivity, we can infer that the statements which best describe beta decay are:

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Answer:

1,2,4

Explanation: