Which of these animals must gain heat to perform internal activities such as digestion? A) warm-blooded animal B) cold-blooded animal C) mixed-blooded animal D) cold-blooded and warm-blooded animals

Answer:

Molarity = 12 M

Explanation:

Given data:

Molarity of solution = ?

Number of moles of NaCl = 3.0 mol

Volume of solution = 250 mL (250/1000 = 0.25 L)

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Molarity = 3.0 mol / 0.25 L

Molarity = 12 M

Answer:

\(\boxed {\boxed {\sf 12 \ M \ NaCl}}\)

Explanation:

Molarity, which tells us the concentration of a solution, is found by dividing the moles of solute by the liters of solution.

\(M=\frac{moles \ of \ solute}{liters \ of \ solution}\)

1. Define Values

There are 3.0 Moles of NaCl. This is the moles of solute.

There are 250 milliliters of solution, but we need the liters.

    a. Convert mL to L

1 milliliter is equal to 0.001 liters. We can multiply the given number of              milliliters (250) by 0.001.

250 mL * 0.001 L/mL= 0.25 L

\(moles \ of \ solute = 3.0 \ mol \ NaCl \\liters \ of \ solution= 0.25 \ L\)

2. Calculate Molarity

Substitute the values into the formula.

\(M=\frac{3.0 \ mol \ NaCl}{0.25 \ L}\)

Divide.

\(M= 12 \ mol \ NaCl/L\)

3. Define Units

1 mole per liter is equal to 1 molar.

Our answer of 12 mol NaCl/ L is equal to 12 M NaCl

The molarity is 12 M NaCl

Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

THANKS

IF THE ANSWER IS CORRECT , THEN MARK ME AS BRAINLIST

Answer:  three very important kinds of things: coal, oil, and natural gas.

Explanation:

Fossils are the preserved remains of plants and animals whose bodies were buried in sediments.

The creation of fossil fuels—either oil, natural gas, or coal—from these fossils is determined by the type of fossil, the amount of heat, and the amount of pressure. Fossil fuels are hydrocarbons comprised primarily of the following elements: carbon and hydrogen and some sulfur, nitrogen, oxygen, and mineral matter.

Find more information about Fossils here:

brainly.com/question/11829803

To calculate the molarity of vinegar, we need to know the moles of acetic acid (the main component of vinegar) and the volume of vinegar used.

The change in volume during the titration is:

Change in volume = Final volume - Initial volume

                = 33.5 mL - 12.3 mL

                = 21.2 mL

Assuming that the density of vinegar is approximately 1 g/mL, we can convert the change in volume to grams:

Change in volume (mL) × Density (g/mL) = Mass (g)

21.2 mL × 1 g/mL = 21.2 g

Next, we need to convert the mass of acetic acid to moles. The molar mass of acetic acid (CH3COOH) is approximately 60.05 g/mol:

Moles = Mass (g) / Molar mass (g/mol)

     = 21.2 g / 60.05 g/mol

     ≈ 0.353 mol

Finally, we calculate the molarity of vinegar using the moles and total volume:

Molarity = Moles / Total volume (L)

        = 0.353 mol / 0.0212 L

        ≈ 16.65 M

Therefore, based on the information provided, the molarity of vinegar is approximately 16.65 M.

Answer:

CCl4 - Nonpolar

CH3OH - polar

NH3 - polar

CS2 - Nonpolar

Explanation:

One important thing that we should know is that polarity has to do with the presence of a resultant dipole moment in a molecule.

Dipole moment is a vector quantity, This means that its direction is also taken into account when discussing the dipole moment of molecules.

Hence, symmetrical molecules such as CS2 and CCl4 are non-polar even though they have polar bonds because their dipoles cancel out(zero resultant dipole moment).

On the other hand, NH3 and CH3OH are non-symmetrical molecules hence they possess an overall dipole moment and are polar molecules.

Answer

(a) 172.848 grams

(b) 168.584 grams

Explanation

The balanced equation for the reaction of aluminum with chlorine gas is:

(a) Mass of Al = 35 g

From the Periodic Table;

Molar mass of Al = 27 g/mol

Molar mass of AlCl₃ = 133.34 g/mol

From the balanced equation above; 2 moles Al produced 2 moles AlCl₃

So in grams, 2 mol x 27 g/mol = 54 g Al produced 2 mol x 133.34 g/mol = 266.68 g AlCl₃

Therefore, 35 g Al will form:

172.848 grams of aluminum chloride will be formed.

(b) Mass of Al = 42.8 g

Also from the Periodic Table; the molar mass of Cl₂ = 70.90 g/mol

From the equation above; 2 mol of Al requires 3 mol Cl₂.

In grams, 2 mol x 27 g/mol = 54 g Al requires 3 mol x 70.90 g/mol = 212.7 g Cl₂

Hence, 42.8 g Al will react with:

168.584 grams of chlorine will react completely with 42.8 g of aluminum

Answer:

See explanation

Explanation:

The reaction with \(OsO_4\) and \(NaHSO_3\)  will add two "OH" groups to the molecule. In the reaction (figure 1) we can see the different structures for the alkenes. In the Z alkene (cis) we have the 2 methyl groups on the same side. In the E alkene (trans) the 2 methyl groups are placed on opposite sides. In the products, all the "OH" groups are placed at the top. This indicates that the addition of the hydroxyl groups is "syn". In the syn reactions, all the groups are bonded on the same side therefore we will have a stereospecific reaction.

I hope it helps!

Answer: C

Explanation:

Answer: hope this helps

Explanation: you need to solve this first I believe

The sulfate ion has an overall charge of -2, this means that the tin cation must have a charge of +2 so that the charges will cancel out when the charges are transposed when writing the chemical formula of the compound.

Answer: ion

Explanation:

The factor that  doesn’t change the resistance of a wire is pressure. option A.

Resistance is a conductor's capacity to thwart the passage of current. It is controlled by the interplay of the applied voltage and the electric current passing through it. The amount of opposition any object applies to the flow of electric current is referred to as resistance.

The ohm, a unit of measurement for resistance, is represented by the Greek letter omega. According to Ohm's law, the voltage across two places is precisely proportional to the current flowing through a conductor between them.

Hence option A is correct.

Learn more about resistance at

https://brainly.com/question/17563681

#SPJ1

missing part;

The pressure

The length of the resistor.

The thickness of the resistor.

The temperature of the conductor.

Answer:

CsNO₃

Explanation:

The reactants are:

         Cesium chloride  = CsCl

          Silver nitrate  = AgNO₃

Products:

           Silver chloride  = AgCl

The other product:

 Now;

        CsCl  +    AgNO₃  →  AgCl  + ?

The other product is CsNO₃

So;

      CsCl  +    AgNO₃  →  AgCl  +    CsNO₃

The first equilibium is at 1.5 minutes.

This is where the concentrations of both reactants are constant.

Given that carbonic acid, H₂CO₃, has a pKa1 = 6.37 and a pKa2 = 10.33,  if you want to make pH 7  buffer solution starting with NaHCO₃ , we add 0.10M HCL .

a) NaHCO₃ is salt of weak acid and a strong base . the initial pH is greater than 7 means it is basic and we should add 0.10 M HCL to the pH which is 7.

Thus, Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33,  if you want to make pH 7  buffer solution starting with NaHCO₃ , we add 0.10M HCL .

To learn more about carbonic acid here

https://brainly.com/question/15172054

#SPJ1

For a chemical reaction C₂H₆ + 137 kJ → C₂H₄ + H₂, the chemical energy of the reactant and the chemical energy of the products are equal. Option D is correct.

In an exothermic reaction, energy is released as the reactants are converted to products. The negative sign on the enthalpy change (ΔH) indicates that the reaction is exothermic, meaning that energy is released by the system to the surroundings. This energy comes from the chemical energy of the reactants, and in this case, 137 kJ of energy are released.

The chemical energy of a substance is the energy stored in the bonds between its atoms. In this reaction, C₂H₆ (ethane) is converted to C₂H₄ (ethylene) and H₂ (hydrogen gas), which means that some of the bonds in the reactant molecule are broken and new bonds are formed in the product molecules.

The total amount of energy stored in the bonds of the reactants is equal to the total amount of energy stored in the bonds of the products, since energy cannot be created or destroyed, only converted from one form to another. Therefore, the chemical energy of the reactant and the chemical energy of the products are equal.

Hence, D. is the correct option.

To know more about chemical energy here

https://brainly.com/question/30288262

#SPJ1

Answer:

your answer should be B.273 K

Explanation:

Considering the definition of molar mass, there are 162 grams of Al in 6 moles of Al.

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

You want to determine the mass in 6 moles of Al. So, being the molar mass of Al is 27 g/mole, you can apply the following rule of three: If by definition of molar mass 1 mole of Al contains 27 grams, 6 moles of Al contains how much mass?

mass= (6 moles× 27 grams) ÷1 mole

mass= 162 grams

In summary, there are 162 grams of Al in 6 moles of Al.

Learn more about molar mass:

brainly.com/question/5216907

brainly.com/question/11209783

brainly.com/question/7132033

brainly.com/question/17249726

#SPJ1

The enthalpy (in kJ/mol) of the reaction, given that 0.026 moles of H₂O₂ at 25.0 °C is placed in a coffee cup calorimeter is 95.98 KJ/mol

First, we shall determine the heat energy of the reaction. Details below:

Q = MCΔT

Q = 30 × 4.18 × 19.9

Q = 2495.46 J

Finally, we shall determine the enthalpy of the reaction. Details below:

Q = n × ΔH

2.49546 = 0.026 × ΔH

Divide both sides by 0.026

ΔH = 2.49546 / 0.026

ΔH = 95.98 KJ/mol

Thus, the enthalpy of reaction is 95.98 KJ/mol

Learn more about enthalpy change:

https://brainly.com/question/24170335

#SPJ1

a) The saturated solubility level of KCl (aq) at 40°C is 35.7 g/100 mL of water.

b) No, the solution would not be saturated at 90°C. At this temperature, the solubility of KCl in water is higher than at 40°C. Therefore, more KCl can dissolve in 100 g of water at 90°C than at 40°C. To determine if the solution is saturated, we need to compare the amount of KCl that actually dissolved in the water to the maximum amount of KCl that can dissolve in the water at that temperature. If the amount of KCl that dissolved is less than the maximum amount, then the solution is unsaturated. If the amount of KCl that dissolved is equal to the maximum amount, then the solution is saturated. If the amount of KCl that dissolved is greater than the maximum amount, then the solution is supersaturated.

c) Two ways in which saturation can be achieved if only 40 g of KCl is added to 100 g of water at 90°C are:

i) Heating the solution to a higher temperature: As the temperature of the solution is increased, the solubility of KCl in water also increases. Therefore, by heating the solution to a higher temperature than 90°C, more KCl can be dissolved in the water until the solution becomes saturated.

ii) Allowing the solution to cool slowly: If the solutionis heated to a temperature higher than 90°C and then allowed to cool slowly, the solubility of KCl in water decreases as the temperature decreases. This means that as the solution cools, KCl will begin to precipitate out of the solution until the solution becomes saturated. Alternatively, if the solution is left undisturbed at 90°C and allowed to cool slowly, KCl will begin to precipitate out of the solution as it reaches its saturation point.

Answer:

\(\boxed {\tt 116}\)

Explanation:

To find the mass number of an isotope, add the number of neutrons and protons.

\(mass \ number = neutrons + protons\)

There are 66 neutrons and 50 protons in the this isotope of tin.

\(mass \ number = 66+50\)

Add 66 and 50.

\(mass \ number = 116\)

The mass number of this tin isotope is 116.

Answer:

Store the genetic instructions needed to specify traits.

In DNA, the primary function of chromosome is store the genetic instructions needed to specify traits.

DNA is a hereditary material  which is present in human beings as well as all other living organisms.  Every cell which is present in an organism's body has DNA  which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.

Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.

DNA bases are capable of pairing up with each other. Adenine pairs with thymine and guanine pairs up with cytosine .Each base is also attached to a sugar molecule  and a phosphate group. A base, phosphate  sugar are together called as nucleotides.

Learn more about DNA,here:

https://brainly.com/question/22499464

#SPJ6

Answer:

iodine pentachloride

Explanation:

a) The number of H⁺ ions is 10⁻⁹ and it is basic.

b) The number of H⁺ ions is 10⁻⁷ and it is neutral.

c) The number of OH⁻ ions is 10⁻¹³ and it is acidic.

Water's pH position indicates how acidic or introductory it is. The range is 0 to 14, with 7 acting as a neutral value. A pH of lesser than 7 denotes a base, while one of lower than 7 suggests acidity.

The pH scale really measures the proportion of free hydrogen and hydroxyl ions in water. Water that contains further free hydrogen ions is acidic, whereas further free hydroxyl ions makes water more introductory. Since chemicals in the water can alter pH, pH is a pivotal sign of a chemical change in the water. In" logarithmic units," pH is expressed. Each value signifies a10-fold variation in the water's acidity or basicness. Ten times as acidic as water because water has a pH of five.

a) [H⁺] = 1 x 10⁻¹⁴/1 x 10⁻⁵ = 10⁻⁹.

Since the [H⁺] < [OH⁻] the solution is basic.

b) [H⁺] = 1 x 10⁻¹⁴/1 x 10⁻⁷ = 10⁻⁷

since the [H⁺] = [H⁺]

The solution is neutral

c) [OH⁻] = 1 x 10⁻¹⁴/1 x 10⁺ = 10⁻¹³

since the [H⁺] > [OH⁻]

the solution is acidic

To know more about pH scale, click the link given below:

https://brainly.com/question/1433865

#SPJ4

In both plants and animals, the process of cellular respiration may be broken down into the following steps: Oxygen + carbon dioxide.

When plant cells undergo cellular respiration, oxygen is taken in through the plant's leaves from the surrounding atmosphere, and carbon dioxide is exhaled back into the atmosphere as a byproduct of the process. In contrast, when animal cells undergo cellular respiration, oxygen is taken in through the lungs, and carbon dioxide is exhaled through the lungs.

Therefore, a quick review, throughout the process of cellular respiration, plants and animals trade oxygen and carbon dioxide with one another.

Therefore, we may draw the following conclusion: Oxygen + carbon dioxide is a shorthand for the process of cellular respiration in plants and animals.

Know more about cellular respiration at,

https://brainly.com/question/13721588

The mole fraction of N₂ after the mixture of 4.0 L of N₂ at 15 atm with 4.0 L of H₂ at 7.0 atm is 0.68.

We can calculate the mole fraction of N₂ with the following equation:

\( X_{N_{2}} = \frac{n_{N_{2}}}{n_{t}} = \frac{n_{N_{2}}}{n_{N_{2}} + n_{H_{2}}} \)   (1)

The number of moles of N₂ and H₂ can be found with the ideal gas law:

\( PV = nRT \)

Where:

P: is the pressure

R: is the gas constant

T: is the temperature

V: is the volume

For nitrogen gas we have:

\( n_{N_{2}} = \frac{P_{N_{2}}V_{N_{2}}}{RT} \)   (2)

And for hydrogen:

\( n_{H_{2}} = \frac{P_{H_{2}}V_{H_{2}}}{RT} \)   (3)

After entering equations (2) and (3) into (1), we get:

\( X_{N_{2}} = \frac{\frac{P_{N_{2}}V_{N_{2}}}{RT}}{\frac{P_{N_{2}}V_{N_{2}}}{RT} + \frac{P_{H_{2}}V_{H_{2}}}{RT}} \)  

Since RT are constants, we have:

\( X_{N_{2}} = \frac{P_{N_{2}}V_{N_{2}}}{P_{N_{2}}V_{N_{2}} + P_{H_{2}}V_{H_{2}}} \)                

We know that:

\( P_{N_{2}} = 15 atm\)                

\( V_{N_{2}} = 4.0 L\)                

\( P_{H_{2}} = 7.0 atm\)                

\( V_{H_{2}} = 4.0 L\)          

so:

\( X_{N_{2}} = \frac{15 atm*4.0 L}{15 atm*4.0 L + 7.0 amt*4.0 L} = 0.68 \)                

Therefore, the mole fraction of N₂ is 0.68.

Find more here:

https://brainly.com/question/4147359?referrer=searchResults

I hope it helps you!

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

Know more about    characteristic  here:

https://brainly.com/question/28790299

#SPJ8

Answer:

I can say that knowledge of separating mixtures can help us in daily life and within society in the following ways:

1. Purification of water: Separation techniques are used to purify water for drinking and industrial purposes. It is essential to remove impurities from water to prevent diseases.

2. Recycling: Separation techniques are used to separate materials for recycling. This helps reduce the amount of waste in landfills and helps conserve resources.

3. Food industry: Separation techniques are used in the food industry to separate unwanted particles from food products. This helps ensure that the food we eat is safe and free from contaminants.

4. Medicine: Separation techniques are used in the pharmaceutical industry to separate and purify chemicals for use in medicine. This helps ensure that medicines are safe and effective.

5. Environmental protection: Separation techniques are used to remove pollutants from the environment. This helps protect our natural resources and prevent pollution-related health problems.

6. Oil and gas industry: Separation techniques are used to separate crude oil and natural gas into their various components. This helps in the production of energy and other useful products.

In summary, knowledge of separating mixtures is essential in our daily lives and within society. It helps ensure that we have access to safe and clean water, food, medicine, and energy, and also helps protect the environment.

Explanation: