Which one of the following substances is an element?​

Answer:

B. review the evidence

Explanation:

To reach decision in criminal case,jurors must review evidence as it may contain some important information which could help in decision such as investigation of hairs,nails, etc which contain DNA through which decision making would be easy.

DNA  is a hereditary material  which is present in human beings as well as all other living organisms.  Every cell which is present in an organism's body has DNA  which is the same. Most of the DNA is situated in the cell's nucleus  and small amount of it can be found in the cell's mitochondria as well.

Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.

DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule  and a phosphate group. A base, phosphate  sugar are together called as nucleotides.

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Answer:

Yes

Explanation:

Answer:

can you show me a picture of the two spheres thanks!!

Answer:

Telophase

Explanation:

During telophase, a nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.

I hope this helps! (If not, I am very sorry!)

Answer:3

Explanation:

Answer:

2.2876e+24 or 2.2876000000000000000000000000 (same thing)

Explanation:

First we can do the exponents first

When there is an exponent on top of a number, it means that we need to multiply that number by the amount that the exponent says by itself.

10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 × 10 = .....

1E24 or 1,000,000,000,000,000,000,000,000

1,000,000,000,000,000,000,000,000 × 1.204 = ......

2.2876e+24 or

2.2876000000000000000000000000

~ 2.2876 r 2.288 or 2.28, or 2.3

Depends on how much you want to round it up to.

Answer:

sheer adhesion

Explanation:

edge 2021

Answer:

a change in an atom's nunclues usually producing a different elements.

on the other hand, involved only a rearrangedment of electrons and do not involve change in the nuclie

Explanation:

Hope it helps kindly follow me

Answer:

Explanation:

2S       +       3O₂       =       2SO₃

2moles      3 moles

2 moles of S react with 3 moles of O₂

5 moles of S will react with 3 x 5 / 2 moles of O₂

= 7.5 moles of O₂ .

O₂ remaining unreacted = 10 - 7.5 = 2.5 moles .

All the moles of S will exhausted in the reaction and 2.5 moles of oxygen will be left .  

Answer:

The total amount of heat needed to change 2250 grams of silver at 200 ºC to 0ºC is 5805 J.

Explanation:

The melting point of silver is 961.8 ºC, meaning that heat released is entirely sensible. Therefore, the amount of heat released by the sample of silver ([tex]Q[/tex]), measured in joules, is determined by the following formula:

[tex]Q = m\cdot c\cdot (T_{f}-T_{o})[/tex] (1)

Where:

[tex]m[/tex] - Mass, measured in kilograms.

[tex]c[/tex] - Specific heat of silver, measured in joules per grams-degrees Celsius.

[tex]T_{o}[/tex], [tex]T_{f}[/tex] - Initial and final temperatures, measured in degrees Celsius.

If we know that [tex]m = 0.225\,kg[/tex], [tex]c = 129\,\frac{J}{kg\cdot^{\circ}C}[/tex], [tex]T_{o} = 200\,^{\circ}C[/tex] and [tex]T_{f} = 0\,^{\circ}C[/tex], then the heat received by the sample of silver is:

[tex]Q = (0.225\,kg)\cdot \left(129\,\frac{J}{kg\cdot ^{\circ}C} \right)\cdot (0\,^{\circ}C - 200\,^{\circ}C)[/tex]

[tex]Q = -5805\,J[/tex]

The total amount of heat needed to change 2250 grams of silver at 200 ºC to 0ºC is 5805 J.

Answer:11.25g

Explanation:

Answer:

HERE IS UOUR ANSWER MATE.............

➡️High-Sodium Foods are :-

1) Smoked, cured, salted or canned meat, fish or poultry including bacon, cold cuts, ham, frankfurters, sausage, sardines, caviar and anchovies.

2) Frozen breaded meats and dinners, such as burritos and pizza.

3) Canned entrees, such as ravioli, spam and chili.

4) Salted nuts.

5) Beans canned with salt added.

➡️ Reducing sodium and increasing potassium in your diet can help control hypertension and lower your risk of cardiovascular disease and death. Lowering blood pressure reduces the risk of heart disease and stroke.

➡️Many fresh fruits and vegetables are rich in potassium:

1 . Bananas

2 . oranges

3 . Cantaloupe

4 . Honeydew

5 . Apricots

6 . Grapefruit

(some dried fruits, such as prunes, raisins, and dates, are also high in potassium)

7 . Cooked spinach.

8 . Cooked broccoli.

9 . Potatoes.

10 . Sweet potatoes.

11 . Mushrooms.

12 . Peas.

13 . Cucumbers.

➡️ A salt is a chemical compound consisting of an ionic assembly of cations and anions. Salts are composed of related numbers of cations and anions so that the product is electrically neutral.

Salt ( for chemistry) is a substance produced by the reaction of an acid with a base. A salt consists of the positive ion (cation) of a base and the negative ion (anion) of an acid.

➡️Most of the salt in food, as well as the salt in a shaker, is sodium chloride. Sodium chloride isan ionic compound with the chemical formula NaCl. Processed foods contain a lot of salt and therefore a lot of sodium (Na). As a result, many people consume too much of this alkali Earth metal.

High-sodium diets have been linked to high blood pressure. High blood pressure, in turn, increases the risk of stroke, heart attack, and kidney failure. Reducing sodium intake may help prevent these health problems.

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THIS QUESTION WAS TOOOO LONG.....

Explanation:

MARK ME AS BRAINLIST..........................

Answer:

4Al + 3O2 → 2Al2O3

Explanation:

Answer:

9.63×10²⁴ particles of H₂O

Explanation:

We'll begin by writing the balanced equation for the reaction. This is given below:

CH₄ + 2O₂ —> CO₂ + 2H₂O

From the balanced equation above,

1 mole of CH₄ reacted to produce 2 moles of H₂O.

Next, we shall determine the number of mole of H₂O produced by the reaction of 8 moles of CH₄. This can be obtained as follow:

From the balanced equation above,

1 mole of CH₄ reacted to produce 2 moles of H₂O.

Therefore, 8 moles of CH₄ will react to produce = 8 × 2 = 16 moles of H₂O.

Thus, 16 moles of H₂O were obtained from the reaction.

Finally, we shall determine the number of particles of H₂O produced. This can be obtained as follow:

Number of mole of H₂O produced = 16 moles

Number of particles produced =?

From Avogadro's hypothesis,

1 mole = 6.02×10²³ particles

Therefore,

16 mole = 16 mole × 6.02×10²³ particles / 1 mole

16 moles = 9.63×10²⁴ particles

Therefore, 9.63×10²⁴ particles of H₂O were produced.

Answer: Help

Explanation:

.

Answer:

Heterogeneous

Explanation:

you dont remember no ice in it

Answer:

genes I believe???? like genes transmitted from past relatives

0.25 L Barium nitrate solution contains 0.02 mol nitrate ions

Given

0.04 M Barium nitrate, Ba(NO₃)₂(aq)

Required

The volume of Barium nitrate

Solution

Ionization of Barium nitrate in 1 L solution :

Ba(NO₃)₂ ⇒ Ba²⁺ + 2NO₃²⁻

mol :

0.04             0.04    0.08

There is 0.08 mol of nitrate ions in 1 L solution

So for 0.02 mol nitrate ions :

= 0.02/0.08 x 1 L

= 0.25 L

Explanation:

[tex] { {.112201 \times \frac{?}{?} }^{?} }^{?} \times \frac{?}{?} \times \frac{?}{?} [/tex]

Answer:

2Al(NO3)3 + 3H2SO4 → Al2(SO4)3 + 6HNO3

Explanation:

i just looked up how to balance it, i dont really know how to balance it exactly

Answer: A-Copper.

Explanation:

Copper is the element that could be formed at the anode when a molten salt is electrolyzed due it's variable oxidation state.

An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.

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Answer:

the 2p5 should have filled up one more so it would be 2p6 ...which assuming it's not an excited electron?

Answer:

Explanation:

A form of severe weather is drought, which is a prolonged period of persistently dry weather (that is, absence of precipitation).This can cause wild fires which impact the growth of trees.They cause the tree the release carbon dioixide rather than store!

Answer:

combustion reaction

Explanation:

because we have a carbon based compound reaction with oxygen gas to produce carbon dioxide and water.

Answer:

The relationship between the frequency of a wave and the wavelength is an inverse relationship, therefore, if the wavelength of a wave increases and the velocity of the wave stays the same, the frequency of the wave decreases.

An example is the ocean wave, if the distance between successive wave crests, which is the wavelength, 'λ', of the wave, increases, while the velocity, 'v', of the wave coming to shore remains the same, the number of wave crest arriving at the beach in a given period of time, which is the frequency of the wave, 'f',  decreases according to the following equation;

f = v/λ

Explanation:

The frequency and wavelength have inverse relationship. With increase in wavelength there has been a decrease in frequency when speed has been kept constant.

Wavelength has been defined as the distance traveled by the wave in a unit time, while frequency has been defined as the rate of the repetition of the wave in unit time.

The relationship between the wavelength and frequency has been given by;

Wavelength = [tex]\rm \dfrac{speed}{frequency}[/tex]

Since the speed has been constant, there has been an inverse relationship between the frequency and wavelength. Thereby with increase in wavelength there has been a decrease in frequency and vice versa.

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Explanation:

.........................:)

The final volume of the gas at the final pressure can be determined using Boyle's law. The volume of the gas at a pressure of 2.75 atm is 1.03 ml.

Boyle's law states that, at constant temperature, the volume of a gas is inversely  proportional to the pressure of the gas.

Hence, PV = a constant.

Let P1 and V1 be the initial pressure  and volume and P2 and V2  be the final pressure and volume then we can write it as,

P1 V1 = P2 V2.

Given that, P1 = 1.89 atm

P2 = 2.75 atm

V1 = 1.50 ml

V2 = P1 V1 / P2

V2  = 1.89 atm × 1.50 ml/ 2.75 atm

      = 1.03 mL.

Therefore, the volume of the gas at a pressure of 2.75 atm is 1.03 ml.

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The specific heat capacity of copper metal : 0.390 J/g °C

Given

25 g metal

Δt metal = 18°C

15 g water

Δt water = 2.8 °C

Required

The specific heat capacity of copper metal

Solution

Q out = Q in

Q releases by metal = Q absorbed by water

m.c.Δt metal = m.c.Δt water(c water = 4.184 J/g °C)

25 x c x 18 = 15 x 4.18 x 2.8

c = 0.390  J/g °C

Answer:

answer d

Explanation:

methy group is in the second position while the double bond is in the third position