I will give 10 points

Answer:

There are more nutrients available in estuaries. There are more nutrients available in estuaries.

Explanation:

Answer:

1.4 L

Explanation:

From the question given above, the following data were obtained:

Initial volume (V1) = 1.3 L

Initial temperature (T1) = 280 K

Final temperature (T2) = 303 K

Final volume (V2) =?

With the above data, we can obtain the new volume of the gas by using the Charles' law equation as shown below:

V1 /T1 = V2 /T2

1.3/280 = V2 /303

Cross multiply

280 × V2 = 1.3 × 303

280 × V2 = 393.9

Divide both side by 280

V2 = 393.9/280

V2 = 1.4 L

Thus, the new volume of the gas is 1.4 L

Answer:

You're answer is B.

Explanation:

Covalent Bonds share a negative and positive ion.

In covalent bonding, electrons are shared because sharing allows them to achieve a noble gas configuration. Therefore, option (A) is correct.

A covalent bond is created by the equal sharing of electrons from both bonded atoms. The pair of electrons contributing to this type of bonding is known as shared pair.

Covalent bonds are also known as molecular bonds. Sharing of bonding pairs will make sure that the atoms attain stability in their outer shell as the atoms of noble gases.

Elements with very high ionization energies are not capable of transferring electrons and elements with very low electron affinity cannot accept electrons. Such atoms tend to share their electrons with the other atoms of the same element in a way that both atoms can achieve octet configuration in their valence shell.

This type of association through sharing of electrons between different or the same kinds is called Covalent Bond. Covalent bonds rarely dissociate spontaneously after formation.

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Answer: the accepted value for the density of aluminum

Explanation:

took the test

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{4.8 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.8}{6.02} \\ = 0.797342192 \\ [/tex]

We have the final answer as

Hope this helps you

Answer: D. 8.0 x 10^-1 moles

Explanation:

Answer:

the time taken for the radioactivity of a specified isotope to fall to half its original value.

Answer:

a)oxygen and chlorine

b) H20+NaCl= NaOH + O+ Cl

c) Cl2+ Ca(OH)2=CaOCl2+CaCl2 +HCL

Explanation:

electricity splits up the molecules for water and hydrogen displaces chlorine because its is more reactive.

d. Ba₃(PO₄)₂(s)+6HNO₃(aq)

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product  

To predict whether this reaction can occur or not is one of them, the precipitation reaction. A precipitation reaction occurs if two ionic compounds which are dissolved reacted to produce one of the products of the ion compound does not dissolve. Formation of these precipitating compounds that cause reactions can occur  

Because A precipitate is formed, then compounds of CO₃²⁻ and PO₄³⁻ except for Compounds of Li +, Na +, K +, Rb +, Cs +, and NH₄ + are generally included in the insoluble compound

So the reaction :

3Ba(NO₃)₂(aq)+2H₃PO₄(aq)⇒Ba₃(PO₄)₂(s)+6HNO₃(aq)

A precipitate is formed ⇒ Ba₃(PO₄)₂

The polar end of soap can be bonded with the polar end of water. Hence it can be mixed with water and can be washed away. Hence, option D is correct.

Soap is acting as a surfactant in water and oily surface of dirt. A lengthy chain of fatty acids is saltified with sodium or potassium to form a soap molecule. Soap is made up of two components: an ionic component and a long carbon chain.

The characteristics of the two molecules that make up soap are highly dissimilar. These two pieces are referred to as soap's hydrophobic tail dissolves in oils and is naturally water-repellent. It has an ionic makeup.

The second part hydrophilic head, or water-loving portion of the soap molecule, dissolves in water. It is composed of a very long hydrocarbon chain. Therefore, the hydrophilic head of soap molecule easily binds with water and can be washed away.

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Answer:

Ion channel proteins allow ions to diffuse across the membrane. A gated channel protein is a transport protein that opens a "gate," allowing a molecule to pass through the membrane

Explanation:

The right options is a cation and an anion !

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule.

Answer:

Explanation:

Fractional distillation uses the different boiling points of the main elements of air. As the liquid air is heated, the elements change from liquid to gas and separate from one another. At this point, the carbon dioxide will become solid and drop from the cooled air, leaving nitrogen, oxygen and argon in the air.

Answer:

Fractional distillation

Explanation:

Answer: no you need a balance skall to make it the correct balance that you want. yes the hypothesis is correct because you change the balance with your balance scale so obviously it's going to make your hypothesis higher.

Explanation: I HOPE THAT HELPED.

Hello there!

Your answer is C.

Answer:

The right option is; A. It is younger than the rock layer below.

Explanation:

A rock layer deposited on top of another rock layer is younger than the rock layer below. This is based on the law of superposition which states that in any undeformed sequence of rocks that are laid down in layers, the youngest layer of rock will be on top of the sequence, while the oldest layer will be at the bottom of the sequence.

Answer:

When you add so much solute that no more dissolves you have a SATURATED SOLUTION.

Answer:

iIt is called as point of saturation or saturated solution

Answer:

Gas

Explanation:

Because Crude oil can usually be found in the ground as a liquid and in the air is gas can be kerosene.

Answer:

3.38 moles of O2.

Explanation:

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

4CH2OH + 5O2 → 4CO2 + 6H2O

From the balanced equation above,

4 moles of CH2OH required 5 moles of O2 for complete combustion.

Finally, we shall determine the number of mole of O2 needed to react with 2.7 moles of CH2OH. This can be obtained as follow:

From the balanced equation above,

4 moles of CH2OH required 5 moles of O2 for complete combustion.

Therefore, 2.7 moles of CH2OH will require = (2.7 × 5)/4 = 3.38 moles of O2 for complete combustion.

Thus, 3.38 moles of O2 is required.

The atomic mass of lead : 207 g/mol

The mass of this basic particle is expressed in atomic mass units  

This atomic unit uses the standard atomic mass, that is, the C-12 isotope

1 atom C-12 = 12 atomic mass units

The atomic mass of an element (amu = u = g/mol) = the mass in grams of one mole of an element.

The mass of 0.2 mol of Lead equals 41.4 grams​, so the atomic mass :

[tex]\tt \dfrac{41.4}{0.2}=207~g/mol[/tex]

Answer:

The correct option is;

c. Bromine, zinc, calcium, radium

Explanation:

The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups

The location of each of the elements are;

Zinc: Period 4, Group 12

Calcium: Period 4, Group 2

Radium: Period 7, Group 2

Bromine: Period 4, Group 17

Therefore, the element with the largest atomic radius = Radium

The element with the smallest atomic radius = Bromine

Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc

The rank of the elements from smallest to largest atomic radius is therefore;

Bromine, zinc, calcium, radium.

Answer:for my ap3x test the answer was the molecular formula

Explanation:

Ap3x

Answer:

the molecular formula

a p e x

Answer:

103.4 moles of hydrogen

Explanation:

Given data:

Moles of C₁₂H₂₂O₁₁ = 4.70 mol

Number of moles of hydrogen present = ?

Solution:

one mole of C₁₂H₂₂O₁₁  contain 22 moles of hydrogen. Thus in order to determine total number of moles in 4.70 moles of C₁₂H₂₂O₁₁ we will multiply the 22 moles of hydrogen with 4.70 moles of C₁₂H₂₂O₁₁.

1 mole of C₁₂H₂₂O₁₁ = 22 moles of Hydrogen

4.70  × 22 moles

103.4 moles of hydrogen

Answer:

7.62 plug into the equation for freezing

0= 592/7.62x x 90

0 = 77.69x x 90

x=0

therefore according to balton's law, it is required to have 0 + 27.222222222 (balton's number) to get the energy required.

answer is 27.222222 rounded 27. cheers.

Answer:

A. Kinetic Energy

Explanation:

Thermal energy is when the molecules and atoms are vibrating faster due to higher temperatures.

Kinetic energy fits this because the meaning of it is the energy of a moving object.

Since thermal energy comes from moving molecules and atoms, it is therefore a for of kinetic energy.

Answer:

Nomenclature Rules

Explanation:

Answer: Its actually the geneva rules

Explanation:

Answer:

A physical change is any change in matter that involves the substance going from one physical state to another. The reference to a physical state involves solids, liquids, and gases.

Explanation:

Answer:

GIVE BRAINLIEST PLEASE!!!  Answer - 50cm^3 of oxygen

Explanation:

They need (almost) equal amounts of substance to react

hope this helps <3