An animal can ____.

(A) only be prey or predator

(B) be both prey and predator

(C) choose to be prey or predator

Thanks if u help / this is for science they just didn’t have that

The pH at the equivalence point for the titration of 0.25 M HCOOH versus 0.25 M NaOH is 8.5.

Let's consider the following neutralization reaction.

HCOOH + NaOH ⇒ HCOONa + H₂O

At the equivalence point, 0.25 M HCOOH completely reacted with 0.25 M NaOH to form 0.25 M HCOONa.

HCOONa undergoes hydrolysis. The net ionic equation is:

HCOO⁻(aq) + H₂O(l) ⇄ HCOOH(aq) + OH⁻(aq)

Given the concentration of HCOO⁻ is 0.25 M (Cb) and the basic dissociation constant of HCOO⁻ is 4.8 × 10⁻¹¹ (Kb), we can calculate the concentration of OH⁻ using the following expression.

\([OH^{-} ] = \sqrt{Kb \times Cb } = \sqrt{(4.8 \times 10^{-11} ) \times 0.25 } = 3.5 \times 10^{-6} M\)

The pOH of the solution is:

\(pOH = -log [OH^{-} ] = -log (3.5 \times 10^{-6} ) = 5.5\)

The pH of the solution is:

\(pH = 14 -pOH = 14 -5.5 = 8.5\)

The pH at the equivalence point for the titration of 0.25 M HCOOH versus 0.25 M NaOH is 8.5.

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Answer: 2.4e+24

Explanation:

It could just as easily have been selected to be 1/24th of the mass of one atom of a carbon atom, or 1/10th the mass of a calcium atom, A sample of 250 grams is equivalent to 1.58 moles of potassium permanganate.

Answer

C.) slows down a reaction by increasing activation energy

Explanation

Inhibitors are compounds that modify the catalytic properties of the enzyme and, therefore, slow down the reaction rate, or in some cases, even stop the catalysis. Such inhibitors work by blocking or distorting the active site.

Inhibitors, on the contrary, increase the energy of activation of the reaction.

The correct option is

C.) slows down a reaction by increasing activation energy

The equation for the equilibrium constant (K) of the reaction studied in this exercise can be written as follows: K = ([\(CI_20\), 2-] * [\(H_20\)(1)]) / ([\(C0_4^ 2\)-] * [Ht])

In this equation, the concentrations of the species involved in the reaction are represented by the square brackets [ ]. The subscripts indicate the stoichiometric coefficients of each species in the balanced chemical equation.

The reaction being studied involves the following species:

\(C0_4^ 2\)- (ag) + 2Ht (ag) = \(CI_20\), 2- (ag) + \(H_20\)(1)

In the equilibrium constant expression, the concentration of \(CI_20\), 2- is multiplied by the concentration of \(H_20\)(1) and divided by the product of the concentrations of \(C0_4^ 2\)- and Ht. The stoichiometric coefficients in the balanced equation are used as exponents for the concentrations of the respective species.

It is important to note that the concentrations used in the equilibrium constant expression should be in molar units (mol/L) or expressed as partial pressures for gases.

Additionally, the equilibrium constant is specific to a given temperature, and its value provides information about the relative amounts of reactants and products at equilibrium.

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Answer:

B.K2(OH)2 i think that is the answer

Answer: Equator

Explanation:

The equator and the regions near the equator receive maximum solar radiation every year. These areas exhibit warm air. The warm air rises and the cools down then further at low pressure zone it might not be able to hold the water vapors. So the water vapors present in the air will cool down and condense in the form of clouds and the rain fall down.

Answer:

An addition reaction occurs when two or more reactants combine to form a single product.

Addition reactions occur with unsaturated compounds.

The general equation for an addition reaction: A+BA+B →→ C

Hydrohalogenation involves the addition of a hydrogen atom and a halogen atom to an unsaturated compound (containing a carbon-carbon double bond).

A polymer is made up of lots of smaller units called monomers. When these monomers are added together, they form a polymer. One way for polymerization to occur is through an addition reaction. Example: The polymerization of vinyl chloride monomers to form a polyvinyl chloride polymer.

Halogenation is very similar to hydrohalogenation but a diatomic halogen molecule is added across the double bond.

Hydrogenation involves adding hydrogen to an alkene. During hydrogenation the double bond is broken (as with hydrohalogenation and halogenation) and more hydrogen atoms are added to the molecule

The properties of a natural resource that make it useful for humans as a material or energy source is the ability to convert mass into energy and vice versa.

The expression natural resources make reference to all types of matter and energy extracted from nature that can be used to produce goods and services.

Some examples of natural resources include for example irreversible resources such as fossil fuels (i.e., oil, or coal, gas, minerals such as metals, rocks, etc) as well as those based on the use of reversible energy such as eolic air energy, solar radiation or sunlight, soil and hydric resources or water.

Therefore, with this data, we can see that natural resources can be defined as any material and or energy obtained from nature that may be irreversible or reversibly used to produce goods and services.

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Answer:

hydrogen

Explanation:

can i have brainliest please

The total mass of the products will equal the total mass of the reactants.

A calorimeter is a device used to measure the heat of chemical reactions or physical changes. It works by measuring the heat absorbed or released during a reaction or process by monitoring changes in temperature.

Calorimeters can be used to study a wide range of chemical reactions, including combustion, acid-base reactions, and reactions involving enzymes.

Calorimetry is an important technique in the study of thermodynamics, and it has many practical applications.

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Answer:

Explanation:

When the Lewis base  (CH3)2NH reacts with Lewis acid Lewis acid (CH3CH2)3C⁺  which is also a carbocation , a new bond is formed as follows by the donation of a loan pair of electrons by the nitrogen atom of

(CH3)2NH . Here (CH3)2NH donates electrons so it acts as base and the second group accepts electrons so it is acid .

THe structure of the product formed is shown in the file attached .

Answer:

i hope u find what your looking for

0.1875grams/cm3 is the density of the cube below if

the mass is 45g7.

A material substance's density is its mass per unit volume. D is density, M is mass, and V is volume, therefore the formula for density is d = M/V. In terms of grammes per cubic centimeter, density is frequently expressed. As an illustration, the density of water is 1 g/cc, whereas the density of the Earth is 5.51 g/cc.

As kilos per cubic metre, density can also be calculated (in metre-kilogram-second or SI units). As an illustration, air has a density of 1.2 kilograms per cubic metre. Textbooks and manuals contain lists of the densities of common solids, liquids, and gases. The mass of a body can be calculated from its volume using density, and vice versa. The mass is equal to the volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d). You may calculate a body's weight by multiplying its mass by the acceleration of gravity, which is typically of more practical significance than its mass.

Derive the mass and volume of this sugar cube

Mass = 45 grams

sides are h=16m

                L=5cm

               W=3cm

ρ = m/V

ρ = density, kg/m3, or g/(cm)3

m = mass, in kg or g

V = volume, in m3 or (cm)3

Here, ρ = density, m = mass, and v = volume.

ρ = 45/16×5×3

Density of the cube is 0.1875grams/cm3

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Though this question is a matter of opinion, I can provide a possible answer to help guide you in your writing, by choosing the ecology, atmospheric science and geological fields of earth science.

These fields of study or career paths are especially interesting since they often lead to new discoveries regarding the history of our planet, or insights into the possible future of the Earth. Allow me to offer some examples:

Therefore, we can conclude for the reasons listed above that these 3 career paths are some of the possible choices you can use when deciding your own three most interesting fields in Earth science.

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hola, esta pregunta es bastante difícil pero está bien, no lo sé, lo siento :) :)

All the options are solved and answer is written below

A reaction between two or more compounds to form products made after chemical change is called a chemical reaction.

It is given that

A chemical reaction was carried out by mixing 25 g of pure CaCO₃ and 0.75 mole of pure HCl

CaCl₂ , H₂O and CO₂  are the products obtained.

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O

Mole ratio CaCO₃ : HCl : CaCl₂ : H₂O = 1 : 2 : 1 : 1

Molar mass of CaCO₃  = 100 g/mol

Molar mass of HCl  = 36.5 g/mol

Molar mass of H₂O = 18 g/mol

Molar mass of CaCl₂= 110.98 g/mol

Moles of CaCO₃ = 25/100 = 0.25 moles

Moles of HCl present = 0.75 mole

For 0.25 moles of CaCO₃ 0.5 moles of HCl is required , as the moles of HCl is present in excess therefore

a. CaCO₃ is the limiting reactant

b. mass of CaCl₂ produced

Moles of CaCl₂  produced = 0.25 moles

1 mole means 110.98 gm

0.25 mole means 0.25* 110.98 = 27.74 gm

c. moles of water molecules formed

for 0.25 moles of CaCO₃ 0.25 moles of water will be formed

d.Volume of Co produced at STP

PV = nRT

P= 1 atm

V=?

R = 0.0821 atm L/K/mol

V = 0.25 * 0.0821 * 273 /1

V = 5.6 liter

e. The mass of NaOH required to absorb CO₂ produced in the reaction

Ratio of NaOH:CO₂ = 2 :1

0.5 moles will be required , i.e.

0.5 *40

20 grams of NaOH will be required.

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The pH of the solution is 10.82.

To solve this problem, we need to determine the concentration of the hydronium ion (\(H_3O^+\)) in the solution. This can be done using the following steps:

Write the balanced chemical equation for the reaction between HBr and CH₃NH₂.

HBr + CH₃NH₂ → CH₃NH₃⁺ + Br⁻

Write the expression for the base dissociation constant (Kb) for CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

Calculate the concentration of hydroxide ions (OH⁻) in the solution using the Kb value and the concentration of CH₃NH₂.

Kb = [CH₃NH₃⁺][OH⁻]/[CH₃NH₂]

4.4 × 10⁻⁴ = x² / (0.400 M)

x = 6.63 × 10⁻³ M

[OH⁻] = 6.63 × 10⁻³ M

Calculate the concentration of \(H_3O^+\) using the equilibrium constant for the reaction between HBr and \(H_2O\).

\(HBr + H_2O = H_3O^+ + Br^-\)

\(Kw = [H_3O^+][OH^-] = 1.0 * 10^{-14}\\[H_3O^+] = Kw/[OH-] = 1.51 * 10^{-11}\)

Calculate the pH using the concentration of \(H_3O^+\).

\(pH = -log[H_3O^+]\\pH = -log(1.51 * 10^{-11})\)

pH = 10.82

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Answer:

The weight percent of NaCl in the container​ is 21.5%

Explanation:

Given that,

Mass of NaCl = 168.90 gram

Mass of water = 616.00 grams

We need to calculate the weight percent of NaCl in the container​

Using formula of percentage of weight

\(weight\ \%\  of\ component\ of\ the\ solution =\dfrac{weight\ of\ the\ component\ in\ the\ solution}{total\ weight\ of\ the\ solution}\times100\)

Put the value into the formula

\(weight\ \%\  of\ component\ of\ the\ solution =\dfrac{168.90}{168.90+616.00}\times100\)

\(weight\ \%\  of\ component\ of\ the\ solution=21.5\%\)

Hence, The weight percent of NaCl in the container​ is 21.5%

Explanation:

p=mv

=(4.237)(2.5x10^-2)^3

=6.6x10^-5 kgm-3

The water in a garden hose flows at a rate of 10.0 liters per minute. Therefore, 158 gal/hr is the flow rate in gallons per hour.

Flow rate is the amount of liquid that travels in a given length of time. Furthermore, the flow rate is affected by the channel through which the liquid is travelling, the area of the pipe, as well as the velocity of something like the liquid. Furthermore, the formula is. Fluid dynamic rate = pipe or channel area x liquid velocity.

The volume flow value is the rate of liquid (water flow rate formula) passing through every place in an area over time.

1 gal = 3.79 L

60 min = 1 hr

10.0 L/min x 60 min/hr x 1 gal/3.79 L = 158 gal/hr

Therefore, 158 gal/hr is the flow rate in gallons per hour.

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Answer:

14g of Y to form the compound XY₂

Explanation:

In the compound XY, you have 1 mole of X and 1 mole of Y. Thus, you can imagine the molar mass of X is 2g/mol and molar mass of Y is 7g/mol.

Now, in the compound XY₂, you have 1 mole of X but 2 moles of Y.

If you have 2g of X, in this case you will need:

2 moles Y * (7g / mol) =

14g of Y to form the compound XY₂

The amount of element Y needed to form compound XY2 is; 14g of element Y.

From the law of conservation of mass which states that;

Matter can never be created nor destroyed.

By stoichiometry;

Since:

7 g of element Y to form compound XY(y =1)

a g of element Y to form compound XY2(y =2)

In essence,

a g = (2 × 7g)/1

a = 14g

Therefore, 14g of element Y is needed to form compound XY2.

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Answer: The answer is incus

Answer:

See explanation

Explanation:

a)  The average kinetic energy of the molecules of a gas depends on the temperature and the molar mass of the gas. However, at the same temperature, all gases have the same average kinetic energy. Hence Xe and Ne atoms have the same average kinetic energy.

b) To decrease the kinetic energy of Xe atoms the temperature must be changed. When the temperature is changed, Xe a lower average kinetic energy due to its larger molar mass.

c) All gases occupying the same volume have equal number of particles at the same temperature and pressure according to Avogadro's law. Therefore, since Xe and Ne occupy the same volume at the same temperature but different pressures they do not contain the same number of particles. Xe gas contains more particles because there are more moles of Xe gas present than moles of Ne gas. The greater the number of moles of gas present, the more the number of gas particles present.

Answer:

The answer is 82

Explanation:

Dude in the stop says so

Sodium dichromate is the empirical formula for the chemical.

An allotrope of carbon with the chemical formula carbon 6, benzotriyne or cyclo[6]carbon is a hypothetical molecule. Six carbon atoms form the molecule's ring, which is joined by alternating triple and single bonds.

We must identify the compound's simplest whole-number atom ratio in order to obtain the empirical formula. To begin, we can convert the masses of each element to moles as follows:

moles of sodium = 29.84 g / 22.99 g/mol = 1.299 mol

moles of creatinine = 67.49 g / 52.00 g/mol = 1.298 mol

moles of oxygen = 72.67 g / 16.00 g/mol = 4.542 mol

sodium.creatinine.oxygen = 1.299 mol / 1.298 mol : 1.298 mol / 1.298 mol : 4.542 mol / 1.298 mol

sodium.creatinine.oxygen = 1.001 : 1.001 : 3.500

sodium.creatinine.oxygen = 1001 : 1001 : 3500

sodium.creatinine.oxygen = 1001/GCF : 1001/GCF : 3500/GCF

sodium.creatinine.oxygen = 143 : 143 : 500.

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Answer:

2C2 H6 +7O2=4co2+6h2o+heat

The grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g. None of the options provided match the calculated value of 466.64 g.

To determine the grams of magnesium hydroxide (Mg(OH)2) needed to yield 8.00 moles of magnesium chlorate (Mg(ClO3)2), we need to consider the balanced chemical equation for the reaction between magnesium hydroxide and chlorine.

The balanced equation is as follows:

2 Mg(OH)2 + 6 Cl2 → 2 Mg(ClO3)2 + 2 H2O

From the balanced equation, we can see that 2 moles of Mg(OH)2 react with 6 moles of Cl2 to produce 2 moles of Mg(ClO3)2.

Therefore, the stoichiometric ratio is 2 moles of Mg(OH)2 : 2 moles of Mg(ClO3)2.

To calculate the grams of Mg(OH)2 needed, we can use the stoichiometric ratio and the given moles of Mg(ClO3)2.

Given:

Moles of Mg(ClO3)2 = 8.00 moles

Using the stoichiometric ratio, we have:

8.00 moles Mg(ClO3)2 × (2 moles Mg(OH)2 / 2 moles Mg(ClO3)2) = 8.00 moles Mg(OH)2

To convert moles to grams, we need to multiply by the molar mass of Mg(OH)2.

The molar mass of Mg(OH)2 = (24.31 g/mol) + (2 * 16.00 g/mol) = 58.33 g/mol

Grams of Mg(OH)2 = 8.00 moles Mg(OH)2 × 58.33 g/mol = 466.64 g

Therefore, the grams of magnesium hydroxide needed to yield 8.00 moles of magnesium chlorate is approximately 466.64 g.

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Answer:

14.9 mol

Explanation:

To find the number of moles in a given mass of a sample of sodium chloride (NaCl), we can multiply the number of grams in the sample by the molar mass of sodium chloride, which is 58.44 g/mol.

871 g × (1 mol / 58.44 g)

= 871/58.44 mol

≈ 14.9 mol

Note that we rounded to 3 significant figures in the final answer because that is how many significant figures were given in the mass measurement of the sodium chloride sample.