Metal objects, such as knifes or bullets, that come into contact with bones can leave trace evidence on them.
O True
O False

[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:

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.

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

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:

The result of preventing spindle fibers from forming is mitotic division stops in metaphase and cannot proceed to anaphase.

Colchicine is a drug use to remove swelling and decrease the amount of uric acid production.

It prevents the formation of spindle fibers during the cell cycle.

Thus, the correct option is C.

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Answer:

8 valence electrons

Explanation:

The new volume of the gas given the data from the question is  1/2X mL

Data obtained from the question

Initial volume (V₁) = X mL

Initial pressure (P₁) = 2 atm

New pressure (P₂) = 4 atm

New Volume (V₂) = ?

How to determine the new volume

The new volume of the gas can be obtained by using the Boyles’ law equation as illustrated below:

P₁V₁ = P₂V₂

2 × X = 4 × V₂

2X = 4V₂

Divide both side by 4

V₂= 2X / 4

V₂ = 1/2X mL

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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**

Answer:

C

Explanation:

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

Answer:

Decomposition begins at the moment of death, caused by two factors: 1.) autolysis, the breaking down of tissues by the body's own internal chemicals and enzymes, and 2.) putrefaction, the breakdown of tissues by bacteria.

Explanation:

hope it will help you

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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An ice storm is a temperature below freezing resulting from large amount of snow falling, i.e., options A and B.

Freezing rain causes ice storms. Raindrops travel into a tiny layer of below-freezing air near the earth's surface, where they freeze on contact with the ground, trees, automobiles, and other things.

Ice forms when cold rain freezes in contact with surfaces below the freezing point.

Thus, the correct options A and B.

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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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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:

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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[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]

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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Answer:

I think B sorry if wrong

Explanation:

have a good day

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:

ITS B

Explanation:

MY CONSCIOUS MIND IS TELLING ME

Answer:

So A: an addition to a base sequence at the beginning of a gene

Explanation:

This is known as point mutation and it does not have any significant change in the protein and it is least harmful type of DNA mutation.

Answer:

falso

Explanation:

tiempo no determinado El circulation de elctrones

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:

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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Answer:

E:ammonium chloride

F:sodium hydroxide

G:ammonia

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 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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