Substances that are more dense have ___________ (lower or higher) specific gravity.

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:

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:

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

Only the amount of gas is held constant.

Answer:

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

Explanation:

Answer:

I think it is oxygen

Hope it helps :)

Answer:

True

Explanation:

Answer: 3.68 x 10^21 particles

Explanation:

Based on Avogadro's law:

1 mole of any substance has 6.02 x 10^23 atoms

Since 1 mole is the same as molar mass of a substance

237 g = 6.02 x 10^23 atoms

1.45g = Z atoms

To get the value of Z, cross multiply:

(Z atoms x 237g) = (6.02 x 10^23 atoms x 1.45g)

237Z = 8.729 x 10^23

Z = (8.729 x 10^23 / 237)

Z = 3.68 x 10^21

Thus, there are 3.68 x 10^21 representative particles in 1.45 g of the molecular compound.

To find the number of representative particles in 1.45 g of a substance with a molar mass of 237 g/mol, first calculate the number of moles by dividing the mass by the molar mass, then multiply by Avogadro's number. The calculation shows there are approximately 3.69 × 10²± representative particles.

To calculate the number of representative particles in 1.45 g of a molecular compound with a molar mass of 237 g/mol, we need to use Avogadro's number and the concept of molar mass.

First, we determine the number of moles in 1.45 g:

Number of moles = mass (g) / molar mass (g/mol) = 1.45 g / 237 g/mol.

After finding the number of moles, we use Avogadro's number (6.02 × 10²³ particles/mol) to find the number of representative particles:

Number of particles = number of moles × Avogadro's number.

Therefore, we would calculate:

1.45 g / 237 g/mol = 0.0061180 moles.

Number of particles = 0.0061180 moles × 6.02 × 10²³ particles/mol.

After performing the multiplication, we find:

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

Answer:

C a loop

Explanation:

Answer:

I think its C

Explanation:

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: 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

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:

Any scientific theory must be based on a careful and rational examination of the facts. Facts and theories are two different things. In the scientific method, there is a clear distinction between facts, which can be observed and/or measured, and theories, which are scientists' explanations and interpretations of the facts.

Explanation:

A scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results.

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:

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:

3. The rate of formation of the products must equal the rate of formation of the reactants.

Explanation:

The reaction at the equilibrium represents the rate of formation of the products that is equivalent to the rate of formation of the reactants.

It is arise at the equilibrium at the time when the amounts of reactants or products should be same. The Chemical equilibrium refers to the dynamic process that represent the rate of formation of products via the forward reaction i.e. equivalent to the rate where the products should be reform reactions via the reverse reaction.

hence, the option 3 is correct.

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Answer:

Hi There The correct answer There are 3 kinds of solar eclipses: total, partial, and annular. There is a rare hybrid that is a combination of an annular and a total eclipse.

Hope it helps!

Answer:

There are 3 kinds of solar eclipses: partial, total, and annular.

A total solar eclipse occurs when the Moon completely covers the Sun, as seen from Earth.

This one happens when the moon covers part of the sun.

An annular solar eclipse occurs when the Moon appears smaller than the Sun as it passes centrally across the sun and leaves a ring of light around the moon.

Give Brainliest if you please

In pulling up a bucket of water, Harry uses chemical energy converted into mechanical energy, which transforms into gravitational potential energy as the bucket rises.

When Harry pulls up the bucket of water from the well using a pulley, a number of energy transformations occur. Initially, he uses the chemical energy in his body (obtained from the food he eats) to apply mechanical energy to the system (pulley and bucket). As the bucket begins to rise, the mechanical energy is transformed into gravitational potential energy. This is similar to water at a higher elevation having a higher potential energy than water at a lower elevation.

This process demonstrates a key principle in physics: energy is conserved and can be transferred or transformed from one form to another, but is never lost. So in this case, the chemical energy in Harry's muscles is converted into mechanical energy, which in turn is transformed into gravitational potential energy as the bucket is lifted higher in the well.

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Answer:

click all of the boxes

Explanation:

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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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:

by increasing the temperature

Answer:

2.09 atm

Explanation:

We can solve this problem by using the equation of state for an ideal gas, which relates the pressure, the volume and the temperature of an ideal gas:

[tex]pV=nRT[/tex]

where

p is the pressure of the gas

V is its volume

n is the number of moles

R is the gas constant

T is the absolute temperature

In this problem we have:

n = 0.65 mol is the number of moles of the gas

V = 8.0 L is the final volume of the gas

[tex]T=40C+273=313 K[/tex] is the temperature of the gas

[tex]R=0.082 atm L mol^{-1} K^{-1}[/tex] is the gas constant

Solving for p, we find the final pressure of the gas:

[tex]p=\frac{nRT}{V}=\frac{(0.65)(0.082)(313)}{8.0}=2.09 atm[/tex]

0.65 moles of O₂ at 40. °C and 2.1 atm occupy a volume of 8.0 L.

0.65 moles (n) of O₂ originally at 85°C is cooled. It occupies 8.0 L (V) at 40.°C (T). We will convert the final temperature to Kelvin using the following expression.

[tex]K = \°C + 273.15 = 40\°C + 273.15 = 313 K[/tex]

We can calculate the final pressure (P) exerted by the gas using the ideal gas equation.

[tex]P \times V = n \times R \times T\\\\P = \frac{n \times R \times T}{V} = \frac{0.65 mol \times (\frac{0.082atm.L}{mol.K} ) \times 313K}{8.0L} = 2.1 atm[/tex]

0.65 moles of O₂ at 40. °C and 2.1 atm occupy a volume of 8.0 L.

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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:

it mainly  depends what state of lithium chloride that you use to electrolysis, if you choose the aqueous state of lithium chloride then you'll have a produce of chlorine and oxygen at the anode, lithium and hydrogen is produce at the cathode but lithium will react with water to form lithium hydroxide

Explanation:

Final answer:

The electrolysis of molten lithium chloride results in the formation of lithium metal at the cathode and chlorine gas at the anode, involving the direct conversion of chemical energy into electrical energy through electrolysis.

Explanation:

The question is about describing the electrolysis of molten lithium chloride to produce lithium and chlorine gas. The process of electrolysis involves passing an electric current through molten lithium chloride (LiCl), resulting in the formation of lithium metal (Li) and chlorine gas (Cl₂). This process takes place in an electrolytic cell.

Overall reaction: 2LiCl(l) → 2Li(s) + Cl₂(g)

At the cathode: Li⁺ + e⁻ → Li(s)

At the anode: 2Cl⁻ → Cl₂(g) + 2e⁻

These reactions demonstrate the principle of electrochemistry where chemical energy is converted into electrical energy, and vice versa. The electrolysis of molten lithium chloride is an efficient way to produce pure lithium metal and chlorine gas, which have various applications in industries.

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:

B .

Explanation:

Answer:

D

Explanation:

I tried it and it worked :)