The diagram shows genetic structures.



Which label best represents the area marked Y?

chromosome
protein
gene
DNA

Answer:

The unknown amount of potassium chloride is 13.6 grams.            

Explanation:

The reaction of 14 grams of KNO₃ with KCl produces a total mass of 27.6 grams of the products.

The law of conservation of mass tells us that the total mass of the reactants must be the same that the total mass of the products. So, we can find the mass of KCl as follows:

[tex] m_{r} = m_{p} [/tex]

Where r is for reactants and p is for products

[tex] m_{KNO_{3}} + m_{KCl} = m_{p} [/tex]

[tex] 14 g + m_{KCl} = 27.6 g [/tex]

[tex] m_{KCl} = 27.6 g - 14 g = 13.6 g [/tex]

Therefore, the unknown amount of potassium chloride is 13.6 grams.           

I hope it helps you!

Answer:

what are the options?

Explanation:

In an ecosystem the urban heat island effect is caused by construction of tall buildings and concrete roads.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

where the main questions of these assmesnt

Explanation:

Answer:

[tex]4.08x10^{25} molecules[/tex]

Explanation:

Hello there!

In this case, since the understanding of the mole-molecules relationships is analyzed via the Avogadro's number:

[tex]1mol=6.022x10^{23}molecules[/tex]

Next, we can solve the following setup by starting with the 67.8 moles of helium and obtaining the required molecules as follows:

[tex]67.8mol*\frac{6.022x10^{23}molecules}{1mol}\\\\=4.08x10^{25} molecules[/tex]

Best regards!

Answer:

9.00 g H2O

Explanation:

Convert molecules to grams using stoichiometry

(3.01 * 10^23 molecules) * (1 mole H2O / 6.022 * 10^23 molecules) * (18.01 g / 1 mole H2O) = 9.00 g H2O

Answer:

answer  in picture

Explanation:

Answer: Gasoline

Explanation: Siri said so

The non-aqueous means it does not contain water. Among the given options gasoline is an example of a non-aqueous solution. The correct option is A.

The solution which is obtained by dissolving solute in any liquid other than water is defined as the non-aqueous solution. If solute is dissolved in solvent like benzene, alcohol, ether, carbon disulphide, acetone etc. forms a non aqueous solution.

The major difference between the aqueous and non-aqueous solution is that the solvent of an aqueous solution is water whereas in non-aqueous solutions, the solvent is any substance other than water.

The solvent of non-aqueous solution can be polar or nonpolar and depending on the polarity the solutes dissolve in the solvent. Here gasoline is an example of the non-aqueous solution. The gasoline is a crude oil which does not include water as an ingredient.

Thus the correct option is A.

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Answer:

Explanation:

Primary and secondary succession occur after both human and natural events that cause drastic change in the makeup of an area. Primary succession occurs in areas where there is no soil and secondary succession occurs in areas where there is soil.

In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed—disrupted—then recolonized following the disturbance.

Hope this helped :)

-Akito

Answer:

A catalyst is a chemical substance that alters the rate of chemical reaction not consumed by the reaction. Hence, a catalyst can be recovered chen unchanged at the ends of chemical reaction. Catalyst can be divided into two typ the basis whether it speeds up or slowdowns the rate of chemical reaction. The positive catalyst and negative catalyst.

Answer:

A catalyst is a chemical substance thatalters therate of chemical reactions not consumed by the reactions.

The greenhouse effect refers to global warming as a consequence of the accumulation of greenhouse gases.

Greenhouse gases are different types of gaseous elements that trap solar radiation on the Earth's surface.

The most important greenhouse gases include, among others, methane and carbon dioxide (CO2).

In conclusion, the greenhouse effect refers to global warming as a consequence of the accumulation of greenhouse gases.

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Answer: increasing the positive charge of the positively charged object and increasing the negative charge of the negatively charged object.

Explanation:

edge

Answer:

Your answer is A.

Explanation:

Answer:

1.806 x 10^24 atoms total

Explanation:

I believe the ans is (2) pH = 7.

Explanation:

At the equivalence point, the salt of strong acid and strong base is completely hydrolyzed which gives a neutral solution with pH 7 as H+ ion concentration is equal to OH- ion concentration.

Answer:

Tbe reddish brown substance might be the rust that formed overtime in a iron tap and over the course of time mixed with other dust and particles it might have formed another substance .

The reddish brown substance is iron oxide which is formed by the reaction of iron materials with water and air. This oxide layer above the surface of metallic parts is called rust.

The Fe is a reddish metal more reactive towards the air and water as well. Fe is a very common in the manufacturing of many household materials. However, by the action of air and water these metallic parts undergo corrosion.

Corrosion is a chemical change involving the formation of oxide layer over the metallic surface which eventually corrode the substance and make it unusable.

Fe reacts with oxygen of water or air forming the reddish brown iron oxide Fe₂O₃ that is what called the rust. Rust can be seen in needles, vehicle parts made of iron etc.

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Answer:

860. g CuCl₂

General Formulas and Concepts:

Atomic Structure

Stoichiometry

Explanation:

Step 1: Define

[Given] 6.40 mol CuCl₂

[Solve] g CuCl₂

Step 2: Identify Conversions

[PT] Molar Mass of Cu: 63.55 g/mol

[PT] Molar Mass of Cl: 35.45 g/mol

Molar Mass of CuCl₂: 63.55 + 2(35.45) = 134.45 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

860.48 g CuCl₂ ≈ 860. g CuCl₂

Answer:

bR2 since it is nonpolar

Answer:

2 experimental

Explanation:

Answer:

3 M

Explanation:

Molarity equation: M = n/v

n = moles of solute

v = liters of solution

9 moles of NaCl / 3 L

9/3 = 3 M

Answer:

22.2 g of MgF₂

Explanation:

We star from the reaction:

NaF → sodium fluoride

Mg → Magnesium

2NaF  +  Mg →  MgF₂  +  2Na

2 moles of sodium fluoride react to 1 mol of Mg in order to produce 1 mol of magnesium fluoride and 2 moles of sodium.

We convert mass of the reactant to moles:

30 g . 1mol / 41.98 g = 0.715 mol

We assume that Mg is in excess

As ratio is 2:1, if we have 0.715 moles of NaF we may produce the half of moles, of MgF₂

0.715 mol /2 = 0.357 moles of MgF₂

We convert moles to mass: 0.357 mol . 62.30g /mol = 22.2 g

Answer:

Sulfur would gain electrons

Explanation:

Atoms want to have a complete out valence shell and because sulfur only needs 2 more electrons to complete the outer shell it would take 2 more.

air that is cooling will cause the highest pressure

Explanation:

This is because heat has to escape a certain area and if the heat can't escape then more and more pressure will build up in a area.

Answer:

AlI3 is the chemical formula and the name of compound is Aluminium iodide.

Answer:

b.

Explanation: brainliest

Answer:

A.) produces the least amount of product.

Answer:

3, 2, 2,3

..........................

Answer:

1257.03 grams

Explanation:

mass=mole*molar mass

mass=7.4*169.87= 1257.03