Can somebody please help me!!

Answer:

bernacles on a while.

Explanation:

These crustaceans stick to the bodies of baleen whales during their larval stage, when they are still able to swim, and establish a commensal relationship with the mysticetes, since they neither harm nor benefit the host that hosts them, whom they will accompany throughout their lives. .

Answer:

The entropy increases!!!

Explanation:

a pex

The entropy increases in the reaction.

The entropy increases in the reaction if the total number of product molecules are greater than the total number of reactant molecules.

2C3H6(g) + 9O2(g) → 6C02(g) + 6H2O (g)

In the above reaction, the product molecules are greater than the reactant molecules. Hence, entropy increases.

Hence, we can conclude that option A is the answer.

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Answer: If [tex]\Delta G[/tex] for a reaction equals zero, the reaction is at equilibrium.

Explanation:

When a thermodynamic closed system tends to do the maximum amount of non-expansion work then the energy used to do this work is called Gibb's free energy.

The expression for [tex]\Delta G[/tex] can be written as follows.

[tex]\Delta G = \Delta H - T \Delta S[/tex]

where,

[tex]\Delta H[/tex] = enthalpy change

T = temperature

[tex]\Delta S[/tex] = entropy change

This means that [tex]\Delta G[/tex] is the difference between heat released in a process and the amount of heat released in a reversible manner for the same process. So, when the value of of [tex]\Delta G[/tex] comes out to be equal to zero then it means no heat is released or absorbed.

Hence, the reaction is stable or at equilibrium.

Thus, we can conclude that the value of [tex]\Delta G[/tex] = 0 then it means that the reaction is at equilibrium.

The solution in which the most calcium fluoride dissolves is 1M HNO3(aq).

Option (B) is correct.

A system in equilibrium is subjected to change (change in concentration/pressure of reactants/products, temperature, etc.) according to Le Châtelier's principle.

To counterbalance the change and restore equilibrium, the System advances in a direction.

In solution, HNO is a strong acid that will dissociate fully to generate H+ and No3-.

This increasing concentration of H+ will cause the second equilibrium reaction in question to reverse direction, resulting in the production of additional HF.

As a result of the drop in F- concentration, the dissolution equilibrium process of Caf2 moves forward, dissolving more valid CaF2 to produce Ca2+ and F_ and thereby boosting Caf2 solubility.

Thus, HNO3 (B) is the correct option.

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Answer:

75.6

Explanation:

Answer:

transpiration

Explanation:

Answer:

Transpiration

Explanation:

Answer:

speed

Explanation:

Speed is the rate at which something moves. The speed of light is faster than the speed of sound.

Answer:

f = 0.65 hz

Explanation:

Given that,

The distance between adjacent crests, wavelength = 2.4 m

6 crests are observed to move past a given point along the medium in 9.1 seconds.

We need to find the frequency of these waves.

We know that,

Frequency = no. of waves per second.

[tex]f=\dfrac{6}{9.1}\ Hz\\\\=0.65\ Hz[/tex]

So, the frequency of these waves is equal to 0.65 Hz.

Answer:

Volume of solution = 4 liter

Explanation:

Given:

Molarity = 5 M

Number of moles = 20 moles

Find:

Volume of solution

Computation:

Moles of solute mixed per litre of solution is known as molarity. A 1 M sample is the one in which 1 molecule of solvent is soluble in one liter of solution volume.

M = Mol / L

5 = 20 / L

Volume of solution = 4 liter

Answer:

I think it's Nitrogen is right answer

Answer: The standard enthalpy of formation  of [tex]H_2O(g)[/tex] is  -252.1 kJ/mol.

Explanation:

The balanced chemical reaction is,

[tex]Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(g)[/tex]

The expression for enthalpy change is,

[tex]\Delta H=[n\times H_f_{products}]-[n\times H_f_{reactantss}][/tex]

Putting the values we get :

[tex]\Delta H=[2\times H_f{Fe}+3\times H_f{H_2O}]-[1\times H_f{Fe_2O_3}+3\times H_f{H_2}][/tex]

[tex]67.9kJ=[(2\times 0)+(3\times H_f{H_2O})]-[(1\times -824.2kJ/mol)+3\times 0kJ/mol)][/tex]

[tex]H_f{H_2O}=-252.1kJ/mol[/tex]

Thus standard enthalpy of formation  of [tex]H_2O(g)[/tex] is  -252.1 kJ/mol.

Answer:

Answer Below Hope Its Correct.

Explanation:

A weather front is a transition zone between two different air masses at the Earth's surface. Each air mass has unique temperature and humidity characteristics. Often there is turbulence at a front, which is the borderline where two different air masses come together. The turbulence can cause clouds and storms.

Instead of causing clouds and storms, some fronts just cause a change in temperature. However, some storm fronts start Earth's largest storms. Tropical waves are fronts that develop in the tropical Atlantic Ocean off the coast of Africa. These fronts can develop into tropical storms or hurricanes if conditions allow.

Fronts move across the Earth's surface over multiple days. The direction of movement is often guided by high winds, such as Jet Streams.  Landforms like mountains can also change the path of a front.

There are four different types of weather fronts: cold fronts, warm fronts, stationary fronts, and occluded fronts.

Answer:

If you constructed graphs, what trends do they indicate in your data?

Answer:

Carbon is moving into the air

Answer:

C water vapor.

or saturated water vapor ( steam )

Answer:

The following are the Hazmat products warnings that are allowed:

Fully Regulated Aerosol Placard

Fully Regulated Flammable  

Fully Regulated Flammable Solid Placard

Lithium-Ion/Metal Battery label

Explanation:

Hazmat products are substances and materials that are dangerous and poses a risk to people when stored, handled or transported from one location to another at any given time.

Those products are meant to be handled with utmost care, and any carelessness on the individual in question could lead to harm. For example, regulated flammable liquid like kerosene needs utmost care when stored to avoid causing fire outbreak in the location where it is stored.

Answer:

133.340538.

Explanation:

The answer is 133.340538. We assume you are converting between grams AlCl3 and mole. You can view more details on each measurement unit: molecular weight of AlCl3 or mol This compound is also known as Aluminium Chloride. The SI base unit for amount of substance is the mole.

Answer:

3.27*(10^-5) M

Explanation:

For 25°C:

[H3O+] *[OH-] =(10^-14)-->

[OH-]=(10^-14)/[H3O+]-->

[OH-]=(10^-14)/(3.06*10^-10)-->

[OH-]=3.27*(10^-5) M

Answer: [tex]Ca(NO_3)_2[/tex]

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

A double displacement reaction in which on e of the product is formed as a solid is called as precipitation reaction.

The balanced chemical equation for a precipitation reaction is:

[tex]2Na_3PO_4(aq)+3Ca(NO_3)_2(aq)\rightarrow Ca_3(PO_4)_2(s)+6NaNO_3(aq)[/tex]

The salt that should be participated in the double displacement reaction should form the insoluble compound(s) i.e. Ca(NO3)2.

It is the one where the ions should be exchanged. The salts should be soluble in water that should be designated by symbol and can be insoluble in water also same in the solid form. The same should be presented by (s) when the chemical formulas are mentioned. Also, it is one of the product that should be created known as the precipitation reaction.

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Answer:

It is the closest sir.

Have an amazing day and enjoy. P.S Good luck!

Explanation:

Let's chek the orders where mercury and rest planets present

Mercury is closest to sun so gravitational force is most

Answer:

0.030 moles N2O and 1.3 grams N2O

Explanation:

Attatched is an image of the explanation. Hope this helps!

Answer:

1. The balanced chemical reaction is:

[tex]HNO_3(aq)+NaOH(aq)\rightarrow NaNO_3(aq)+H_2O(l)[/tex]

2. The balanced chemical reaction is:

[tex]2HI(aq)+Sr(OH)_2(aq)\rightarrow SrI_2(aq)+2H_2O(l)[/tex]

Explanation:

Hello there!

In this case, according to the given chemical reactions, it is necessary to keep in mind the cations and anions are switched around as a result of the bonds rearrangement in these neutralization reactions; therefore, we can proceed as follows:

1. The balanced chemical reaction is:

[tex]HNO_3(aq)+NaOH(aq)\rightarrow NaNO_3(aq)+H_2O(l)[/tex]

Because all atoms are in the same amount at each side of the equation and the resulting salt is soluble.

2. The balanced chemical reaction is:

[tex]2HI(aq)+Sr(OH)_2(aq)\rightarrow SrI_2(aq)+2H_2O(l)[/tex]

Because all atoms are in the same amount at each side of the equation and the resulting salt is soluble.

Best regards!

Answer:

7

Explanation: i just guessed because i need some points

Answer:

ΔH°r = -483.64 kJ

Explanation:

Let's consider the following balanced equation.

2 H₂(g) + O₂(g)  ⇒ 2 H₂O(g)

We can calculate the standard enthalpy change of the reaction (ΔH°r) using the following expression.

ΔH°r = ∑ΔH°f(p) × np - ∑ΔH°f(r) × nr

where

ΔH°f: standard heat of formation

n: moles

p: products

r: reactants

ΔH°r = ΔH°f(H₂O(g)) × 2 mol - ΔH°f(H₂(g)) × 2 mol - ΔH°f(O₂(g)) × 1 mol

ΔH°r = (-241.82 kJ/mol) × 2 mol - 0 kJ/mol × 2 mol - 0 kJ/mol × 1 mol

ΔH°r = -483.64 kJ

Answer:

For Mass N, Mass H, and Mass O, the mass is 28.0 g N, 4.0 g H, and 48.0 g respectively

Explanation:

The computation of the mass of each element is given below:

As we know that

A1 mole of ammonium nitrate i.e. 2 mol N, 4 mol H, 3 mol

Now we multiply each of above  by the molar masses

For N

= 14.0 g/mol × 2

= 28.0 gN

For H

= 1.0 g/mol × 4

= 4.0 gN

ANd, for O

= 16.0 g/mol × 3

= 48.0 gN

Hence, For Mass N, Mass H, and Mass O, the mass is 28.0 g N, 4.0 g H, and 48.0 g respectively

Answer:

(C) when bonds in food are broken, energy is released

Answer:

energy

Explanation:

Energy is used to do work or produce change. Friction and velocity do not do this.

Answer:

A. 32.6 g/mol

Explanation:

First convert the volume of gas to moles using the ratio 1 mol / 22.4 L at STP.

0.070 L • (1 mol / 22.4 L) = 0.00313 mol

Now divide the grams of gas by the moles of gas:

0.102 g / 0.00313 mol = 32.6 g/mol

Answer:

2.5 mL

Explanation:

Step 1: Given data

Step 2: Calculate the amount of the active ingredient in the medicine

The concentration of the active ingredient is 5% v/v, that is, there are 5 mL of the active ingredient per 100 mL of the medicine. The volume of the active ingredient is 50 mL of the medicine is:

50 mL Med × 5 mL AI/100 mL Med = 2.5 mL AI

Answer:

it will crack because if the water inside of a rock freezes the water would start to expand and start stretching it causing it to break

Explanation: