What is sound energy? Give two examples.

Answer:

T₂ = 101.13 K OR

- 172.02  °C

Explanation:

Given data:

Initial pressure of gas = 755 Kpa

Initial temperature = 30.0°C

Final temperature = ?

Final pressure = 252 Kpa

Solution;

Initial temperature = 30.0°C (30+273 = 303 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

755 Kpa / 303 K = 252 Kpa / T₂

T₂ = 252 Kpa ×303 K / 755 Kpa

T₂ = 76356 KPa.K / 755 Kpa

T₂ = 101.13 K

Kelvin to °C:

101.13 K - 273.15 = - 172.02  °C

Answer:

The 2nd one

Explanation:

ITS THE RIGHT ANSWER

Acids and bases can be measured using a pH scale. The scale has a range of 0 to 14. An indicator called Litmus paper is used to determine if a chemical is an acid or a basic. Here H₂CO₃ is an acid and its pH is less than 7 whereas KOH is a base whose pH is more than 7. The correct option is C.

The H⁺ ion concentration's negative logarithm is known as pH. As a result, the meaning of pH is justified as the strength of hydrogen. In most cases, the strength of acids and bases is quantified using their pH values.

The activity of the hydrogen atoms determines the pH level since this activity is a reliable predictor of the acidity or alkalinity of the water. The pH scale has a range of 0 to 14, with 7.0 being neutral.

Thus the correct option is C.

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Answer:

I think it is oxygen

Hope it helps :)

The question pertains to the normal boiling point of a liquid, which is the temperature at which its vapor pressure equals 1 atm (101.3 kPa). Given the vapor pressure is 50 kPa at 40°C, the normal boiling point must be higher than 40°C, making 60°C the correct answer.

The question concerns the normal boiling point of a liquid, which is defined as the temperature at which a liquid’s vapor pressure equals the atmospheric pressure. In a closed system at 40°C, a liquid has a vapor pressure of 50 kPa, but the normal boiling point occurs when its vapor pressure reaches 101.3 kPa, the typical atmospheric pressure. Given that the vapor pressure of the liquid at 40°C is less than 101.3 kPa, and knowing that vapor pressure increases with temperature until it reaches atmospheric pressure (allowing the liquid to boil), the liquid's normal boiling point must be higher than 40°C. Therefore, the answer is (4) 60°C, as it’s the only option provided that is higher than 40°C.

Answer:

Answer is explained below in the explanation section.

Explanation:

In this whole planet, there are three main determinants which determine the shape, topography and soil features on the surface of Earth. Which are as follows:

1. Weathering

2. Erosion

3. Deposition

All three processes occur simultaneously irrespective of any dependence. In addition, due to weathering, erosion and deposition together affects the land and particular supportive ecosystem.

Likewise in Texas, due to these processes, it has form ten different landforms or eco-regions.

For instance, take weathering into account and its effect on ecoregions of Texas.

In summer, we have hot weather, it means precipitation of water or transition of wet to dry. Windy weather accompanied with erosion cut the mountains and rocks and builds a particular topography suitable for a particular ecosystem. Furthermore, if there are no plants or bushes and soil is exposed to water and wind then erosion is very easy to take place.

So, water, temperature, wind, rivers are extremely powerful agents for weathering , erosion and deposition.

Final answer:

Weathering, erosion, and deposition collectively influence Texas's ecoregions by shaping landscapes, such as creating caves in the Hill Country, forming desert pavement in West Texas, and enriching soils along the Gulf Coast.

Explanation:

The physical processes of weathering, erosion, and deposition play significant roles in shaping the ecoregions of Texas. Weathering breaks down rocks and minerals into smaller pieces through mechanical and chemical processes. For example, the limestone of the Texas Hill Country undergoes chemical weathering through the acidic rainwater, creating characteristic features such as caves and sinkholes.

Erosion is the process by which weathered material is moved from one location to another. In the arid regions of West Texas, eolian erosion by wind can lead to the formation of desert pavement, where fine particles are blown away, leaving a layer of larger rocks. This protects the soil underneath from further erosion.

Finally, deposition is when eroded materials are laid down in new locations. Along the Gulf Coast of Texas, river sediments are deposited, building up the coastal plains and contributing to the growth of deltas. Here, deposition leads to nutrient-rich soils that support diverse ecosystems and human agriculture.

Answer:

B .

Explanation:

Answer:

D

Explanation:

I tried it and it worked :)

Answer: The Molarity of the Chloride ion in a 5M  [tex]AlCl_3[/tex] solution is 15 M

Explanation:

Molarity is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n= moles of solute

[tex]V_s[/tex] = volume of solution in ml

[tex]AlCl_3\rightarrow Al^{3+}+3Cl^-[/tex]

Now as 1 mole of [tex]AlCl_3[/tex] gives 3 moles of [tex]Cl^-[/tex]

5 moles of [tex]AlCl_3[/tex] gives =[tex]\frac{3}{1}\times 5=15[/tex] moles of [tex]Cl^-[/tex]

Thus Molarity of the Chloride ion in a 5M [tex]AlCl_3[/tex] solution is 15 M

Answer:

The weird one that looks like a B is a symbol for a beta ray.

"He" and the infinity looking a represents an alpha particle.

6= Beta ray

7 & 8= alpha particle

Answer:

0.071 mole

Explanation:

As discovered from Avogadro's hypothesis, 1 mole of any substance contains 6.02x10^23 molecules.

This simply means that 1 mole of H3PO4 also contains 6.02x10^23 molecules.

If 1 mole H3PO4 contains 6.02x10^23 molecules,

Then, xmol of H3PO4 will contain 4.3x10^22 molecules i.e

Xmol of H3PO4 = 4.3x10^22/6.02x10^23 = 0.071 mole

From the calculations made above, 4.3x10^22 molecules of H3PO4 have 0.071 mole of H3PO4

Using Avogadro's number, you can find there are approximately 0.71 moles in 4.3 x [tex]10^{22}[/tex] molecules of H3PO4.

To find out how many moles are in 4.3 x [tex]10^{22}[/tex] molecules of H 3 PO 4, you want to use Avogadro's number, which is 6.022 x [tex]10^{23}[/tex] molecules per mole. To find the number of moles:

Number of moles = (Number of molecules) / (Avogadro's constant)

4.3 x [tex]10^{22}[/tex] molecules H3PO4 / (6.022 x [tex]10^{23}[/tex] molecules/mole) = 0.71 moles H3PO4.

So, there are approximately 0.071 moles in 4.3 x[tex]10^{22}[/tex] molecules of H3PO4.

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Answer:

The process of dissolving increases entropy because the solute particles become separated from one another when a solution is formed.

Answer: 0.53g

Explanation:

No of moles= volume ×molarity/1000

We have the volume and the molarity

Volume=4L

Molarity=1.7M

No of moles = 4×1.7/1000

No of moles= 0.0068moles

Remember also that

No of moles= mass given/molar mass

Molar mass of Al(OH)3

Al= 27

O=16

H=1

Molar mass = Al+(O+H)3

Molar mass= 27+(16+1)3

Molar mass= 27+(17)3

Molar mass = 27+51

Molar mass= 78g/mol

To get the mass

Mass given = no of moles × molar mass

Mass= 0.0068×78

Mass= 0.53g

Answer:

click all of the boxes

Explanation:

Hey there!

The two types of ions are anions and cations.

Anions are negative and cations are positive (cheesy, but CAT-ions are PAWS-itive helps me remember).

If there are more electrons than protons, then the negative charge will be higher than the positive charge. So, the ion will overall be negative.

This means the atom is an anion.

Hope this helps!

Answer:

True

Explanation:

Answer:

8 m

Explanation:

by using well known formula

[tex]s=\frac{W}{F}=\frac{56}{7}=8[/tex]

To determine the distance a sled can be pushed with 7 N of force and 56 J of work done, you divide the work by the force, which yields a distance of 8 meters.

To find out how far you can push a sled by applying a force of 7 N, which resulted in 56 J of work, you use the work formula:

In the above, W = 56 J and F = 7 N. To find the distance (d), you rearrange the formula to solve for d:

Now plug in the values:

Therefore, you can push the sled 8 meters by exerting a force of 7 N if the amount of work done was 56 J.

Answer:

C a loop

Explanation:

Answer:

I think its C

Explanation:

Only the amount of gas is held constant.

FOLLOW ME FOR CLEARING YOUR NEXT DOUBT

Answer:

C. Aspirin

Explanation:

If you are using A pex, this is the correct answer.

Reasoning: Soap is not an acid so thats out of the question. I'm not sure if washing soda or antacid are acidic but even if they were, Aspirin is definitely an acid and is way more commonly used than those two.

Answer:

Explanation:

Does the width of a rubber band affect how far it will stretch?

How does the thickness of a material affect insulation?

Do all objects fall to the ground at the same speed?

Answer:

sorry can you please add the questions

Explanation:

but to identify an hypothesis is when before the experiment you are gonna put what you think might happen

Answer:

—262.71°C

Explanation:

Step 1:

The following data were obtained from the question:

Number of mole (n) = 2.4 moles

Pressure (P) = 2.70 atm

Volume (V) = 0.750 L

Temperature (T) =?

Gas constant (R) = 0.082atm.L/Kmol

Step 2:

Determination of the temperature.

Using the ideal gas equation, the temperature can be obtained as follow:

PV = nRT

2.7 x 0.750 = 2.4 x 0.082 x T

Divide both side by 2.4 x 0.082

T = (2.7 x 0.750) /(2.4 x 0.082)

T = 10.29K

Step 3:

Conversion of Kelvin temperature to celsius temperature.

Temperature (celsius) = temperature (Kelvin) - 273

temperature (Kelvin) = 10.29K

Temperature (celsius) = 10.29 - 273

Temperature (celsius) = —262.71°C

Answer:

10.28Kelvin

Explanation:

Using the ideal gas equation;

PV = nRT

P is the pressure

V is the volume of the gas

n is the number of moles

T is the temperature in Kelvin

R is the Gas constant

Given n = 2.4moles

P = 2.70atm

V = 0.750L

R = 0.0821atm.L/mol.K

From the formula above:

T = PV/nR

T = 2.70×0.750/2.4×0.0821

T = 2.025/0.197

T = 10.28K

Answer:

B. Rocks can be formed and altered by the activity of organisms

Explanation:

Answer: Carbon dioxide react with water to produce carbonic acid

so it is a combustion reaction

Explanation: pls mark as brainliest

Answer:

1) 3-methylpentane   2)Butyne

Explanation:

On the first molecule, we have a methyl group on the 3rd carbon, so you will have "3-methhyl". It's a 5 carbon molecule with no double bonds, so "-pentane" is required.

On the second molecule, we have a simple 4 carbon molecule with a triple bond which makes it an Alkyne. 4 carbons makes the prefix "but-" and a alkyne males the ending "-yne".

Answer:

There is a transfer of electrons between the two atoms which creates a strong bond

Explanation:

Typically these bonds result between a metal and a nonmetal which transfer electrons, because of the transfer of electrons and opposite sigsn (+/-) between the atoms in an ionic bond they tend to form quite a strong attraction to eachother. Look up coulombic attraction for more understanding!

1.38 moles of oxygen

Explanation:

Thermal decomposition of Lead (II) nitrate is shown by the balanced equation below;

2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂

The mole ration of Lead (II) nitrate to oxygen is 2: 1

Therefore 2.76 moles of  Lead (II) nitrate will lead to production of? moles of oxygen;

2: 1

2.76: x

Cross-multiply;

2x = 2.76 * 1

x = 2.76 / 2

x = 1.38

Answer:

562g

Explanation:

Molar mass of Ca = 40g/mol

1 mol gives 6.02×10^23 atoms

Xmol of Ca gives 8.46×10^24 atoms

X= 14.05 mol

No of mol= mass/molar mass

Mass = 40 ×14.05 = 562g.

Answer:

The pH of the solution is 2.60.

Explanation:

The pH gives us an idea of the acidity or basicity of a solution. More precisely, it indicates the concentration of H30 + ions present in said solution. The pH scale ranges from 0 to 14: from 0 to 7 corresponds to acid solutions, 7 neutral solutions and between 7 and 14 basic solutions. It is calculated as:

pH = -log (H30 +)

pH= -log (0,0025)

pH=2.60

Answer:

pH of solution is: 12.82

Explanation:

The reaction of hydrochloric acid with calcium hydroxide is:

Ca(OH)₂ + 2 HCl → H₂O + CaCl₂

Where 2 moles of hydrochloric acid react with 1 mole of calcium hydroxide

Moles of HCl and moles of Ca(OH)₂ are:

Moles HCl:

0.02500L × (0.155mol / L) = 3.875x10⁻³moles HCl

Moles of Ca(OH)₂:

0.03500L × (0.112mol / L) = 3.92x10⁻³moles Ca(OH)₂

Moles of Ca(OH)₂ that react are:

3.875x10⁻³moles HCl × (1 mol Ca(OH)₂ / 2 mol HCl) = 1.9375x10⁻³ mol Ca(OH)₂

Thus, moles of Ca(OH)₂ that remain are:

3.92x10⁻³moles Ca(OH)₂ - 1.9375x10⁻³ mol Ca(OH)₂ = 1.9825x10⁻³ mol Ca(OH)₂

Moles of OH⁻ are:

1.9825x10⁻³ mol Ca(OH)₂ × (2mol OH⁻ / 1mol Ca(OH)₂) = 3.965x10⁻³ mol OH⁻

As volume is 25mL + 35mL = 60mL ≡ 0.060L. Molar concentration of OH⁻ is:

3.965x10⁻³ mol OH⁻ / 0.060L = 0.066M OH⁻.

pOH = -log [OH⁻]

pOH = 1.18

pH = 14-pOH

pH of solution is: 12.82

Answer:

pH = 12.80

Explanation:

Step 1: data given

Volume of a 0.155 M Ca(OH)2 = 25.00 mL = 0.025 L

Volume of a 0.112 M HCl = 35.00 mL = 0.035 L

Step 2: The balanced equation

Ca(OH)2 + 2HCl → CaCl2 + 2H2O

Step 3: Calculate moles

Moles = molarity * volume

Moles Ca(OH)2 = 0.155M * 0.025 L

Moles Ca(OH)2 = 0.003875 moles

Moles HCl = 0.112 M * 0.035 L

Moles HCl = 0.00392 moles

Step 4: Calculate the limiting reactant

For 1 mol Ca(OH)2 we need 2 moles HCl to produce 1 mol CaCl2 and 2 moles H2O

HCl is the limiting reactant. It will completely be consumed. (0.00392 moles) Ca(OH)2 is in excess. There will react 0.00392 / 2 = 0.00196 moles

There will remain 0.003875 - 0.00196 = 0.001915 moles Ca(OH)2

Step 5: Calculate molarity of Ca(OH)2

Molarity = moles / volume

Molarity Ca(OH)2 = 0.001915 moles / (0.060 L)

Molarity Ca(OH)2 = 0.0319 M

For 1 mol Ca(OH)2 we have 2 moles OH-

Molarity of OH- = 2*0.0319 = 0.0638 M

Step 6: Calculate pH

Since Ca(OH)2 is a strong base

The ph will be the pH of a strong base

pOH = -log[0.0638)

pOH = 1.20

pH = 14 -1.20 = 12.80

Answer:

Molarity tell us about the concentration of moles of solute in a solution.

Explanation:

Chemical substances are measured in terms of mole. Mole is defined as the amount of substance which contains 6.022×10²³ particles, ions or atoms. In System of international, amount of substance is measured in moles. So molarity tells us more information about amount of solute in a solution as compared to percent solution.

Answer:

Molarity tell us about the concentration of moles of solute in a solution.

Explanation:

.

The strong acid and strong base has high rate constant of dissociation. Weak acid and base are the one whose rate constant for the dissociation is low, they do not dissociate readily in water. The red cabbage juice can be used to determine the strength of acids and bases.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base are the solution which releases hydroxide ion OH⁻ ion when dissolved in water

Red cabbage juice contain a pigment called anthocyanin. Acidic solutions turns purple color of anthocyanin red. Basic solutions turns purple color of anthocyanin greenish-yellow. There will be no change in color in neutral solution.

Therefore, red cabbage juice can be used to determine the strength of acids and bases.

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