how do you solve that ​

Answer:

True

Explanation:

If you were to change up the order the answer may be incorrect

The scientific process is linear and most commonly follows the same sequence of steps in the same order. However, it need to follow all the steps for all scientific process. Hence, the statement is false.

A scientific process is a well designed approach to investigate or analyze the problem and to test a relevant hypothesis. The steps included in the scientific process starts from a scientific question.

The question then generates a hypothesis based on the observations and standard data. The testing is conducted with well designed experiment with all practical tools available.

The experimental results are thoroughly evaluated and the reaches with a conclusion. The results are communicated through various journals. This is the general way of a scientific process. But not every scientific strictly need to follow this. Hence, the statement is false.

Find more on scientific process:

https://brainly.com/question/1347425

#SPJ6

The net ionic equation for the reaction between aqueous solutions of phosphoric acid (H₃PO₄) and potassium hydroxide (KOH) is:

2H⁺(aq) + 2OH⁻(aq) → 2H₂O(l)

In this reaction, two hydrogen ions (H⁺) from the phosphoric acid combine with two hydroxide ions (OH⁻) from the potassium hydroxide to form two water molecules (H₂O).

When H₃PO₄ dissociates in water, it releases three H⁺ ions, while KOH dissociates to produce one OH⁻ ion. The balanced molecular equation is:

H₃PO₄(aq) + 3KOH(aq) → 3H₂O(l) + K₃PO₄(aq)

However, the net ionic equation focuses on the species directly involved in the reaction, excluding spectator ions that do not undergo any change. In this case, the spectator ions are the K⁺ and the phosphate ion (PO₄³⁻). Therefore, the net ionic equation only includes the hydrogen and hydroxide ions, resulting in the equation mentioned above.

The net ionic equation accurately represents the essential species and stoichiometry involved in the reaction between phosphoric acid and potassium hydroxide.

learn more about net ionic equation here:

https://brainly.com/question/32721028

#SPJ11

The subatomic particle that plays the greatest part in determining the properties of an element is the electron (B).

The properties of an element are primarily determined by its atomic structure. Elements are characterized by the number of protons, neutrons, and electrons they possess.

Protons and neutrons are located in the nucleus of an atom, while electrons orbit around the nucleus in energy levels or shells.

The electron configuration of an atom, specifically the arrangement and distribution of electrons in the outermost shell, is what primarily influences the chemical and physical properties of an element. The behavior of atoms in chemical reactions, bonding patterns, and electrical conductivity are all related to the movement and interactions of electrons.

Although protons and neutrons contribute to factors such as atomic mass and stability, the electron's involvement in chemical reactions and interactions is most significant in determining an element's properties.

Therefore, the subatomic particle that plays the greatest part in determining the properties of an element is the electron (B).

Learn more about atomic structure here: brainly.com/question/14214017

#SPJ11

Answer:

Rods

Explanation:

Rods are photoreceptor cells in the eye that help us see in low light but play little to no role in color vision. Therefore, they would help Phineas to see shades of grey and large shapes in the dark,

Answer:

rods

Explanation:

Arrhenius theory of acids and bases proposed by Svante Arrhenius in 1884 states that when an acid is added to water, hydrogen ions (H+) are produced. The correct answer is c. hydrogen ions.

According to Arrhenius theory of acids and bases, which was proposed by Swedish scientist Svante Arrhenius in 1884, an acid is a substance that dissociates in water to produce hydrogen ions (H+) while a base is a substance that dissociates in water to produce hydroxide ions (OH-). Therefore, when an acid is added to water, hydrogen ions (H+) are produced. Selecting the correct option from the given optionsAccording to Arrhenius,  The correct option from the given options is c. hydrogen ions. Hence, the correct answer is option c. hydrogen ions.

To know more about Arrhenius theory of acids and base Visit:

https://brainly.com/question/15387513

#SPJ11

Answer:

A

Explanation:

They react violently with water

According to the electronic configuration and position in periodic table the alkali metals group has the most reactive elements.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

Learn more about electronic configuration,here:

https://brainly.com/question/29757010

#SPJ2

Answer:

Cells are uncountable becasue they move around your body, make up your skin and other organs as well. And because when you grow, the cells multiply, and that makes it very hard for scientists to count cells in a human's body.

Explanation:

Hope this helped!

When 50 NBr3 molecules and 57 NaOH formula units react according to the given balanced equation, the result is the formation of 150 NaBr formula units.

According to the balanced equation provided:

2 NBr3 + 3 NaOH -> N2 + 3 NaBr + 3 HOBr

From the equation, we can see that 2 moles of NBr3 react with 3 moles of NaOH to form 3 moles of NaBr.

To determine the number of NaBr formula units formed, we need to convert the given quantities into moles.

Given:

Number of NBr3 molecules = 50

Number of NaOH formula units = 57

To convert the number of NBr3 molecules to moles, we need to divide the given quantity by Avogadro's number. Similarly, for NaOH formula units, we can directly consider them as moles.

Using Avogadro's number (6.022 x 10^23 molecules/mol), we can calculate the number of moles for NBr3 and NaOH:

Number of moles of NBr3 = 50 / (6.022 x 10^23)

Number of moles of NaOH = 57

Now, we can use the mole ratios from the balanced equation to determine the number of moles of NaBr formed. From the equation, we know that 2 moles of NBr3 react to form 3 moles of NaBr.

Number of moles of NaBr = (Number of moles of NBr3) x (3 moles of NaBr / 2 moles of NBr3)

Finally, we can convert the number of moles of NaBr to the number of NaBr formula units using Avogadro's number:

Number of NaBr formula units = (Number of moles of NaBr) x Avogadro's number

Calculating these values, we find that 50 NBr3 molecules and 57 NaOH formula units react to form 150 NaBr formula units.

To learn more about Avogadro's number click here: brainly.com/question/18948587

#SPJ11

Answer:

0.363 g

Explanation:

2As + 3Cl₂      →   2AsCl₃

calculate the number of moles of arsenic

Number of moles = mass/ molar mass

Number of moles =  0.150 g/ 75 g/mol

Number of moles = 0.002 mol

compare the moles of arsenic with arsenic chloride.

                         As             :             AsCl₃

                          2              :                2

                        0.002        :              0.002

Mass of arsenic chloride produced:

Mass = number of  moles × molar mass

Mass = 0.002 × 181.28 g/mol

Mass = 0.363 g

Mass of arsenic chloride produced is 0.363 g when 0.150 g of arsenic reacts with excess chlorine.

Arsenic trichloride is an inorganic compound with the formula AsCl₃, also known as arsenous chloride or butter of arsenic.

This poisonous oil is colourless, although impure samples may appear yellow. It is an intermediate in the manufacture of organoarsenic compounds

Given data:

Solution:

Chemical equation:

2As + 3Cl₂      →   2AsCl₃

Let's, calculate the number of moles of arsenic ;

Number of moles = mass/ molar mass

Number of moles =  0.150 g/ 75 g/mol

Number of moles = 0.002 mol

Now we will compare the moles of arsenic with arsenic chloride.

                         As             :             AsCl₃

                          2              :                2

                        0.002        :              0.002

Mass of arsenic chloride produced:

Mass = number of  moles × molar mass

Mass = 0.002 × 181.28 g/mol

Mass = 0.363 g

Therefore,Mass of arsenic chloride produced is 0.363 g when 0.150 g of arsenic reacts with excess chlorine..

Learn more about Mole concept here ;

https://brainly.com/question/22540912

#SPJ2

Answer:F =MAX

Explanation:I did that

Answer:

F=MAX

Explanation:

I DID THAT TODAY AT 9:05AM FRIDAY 1/22/2021    

The volume of the unit cell in a body-centered cubic crystal of element X can be calculated as 1.96 x 10^-22 cubic meters.

In a body-centered cubic (BCC) crystal structure, there is one atom at each of the eight corners of the unit cell and one atom at the center of the unit cell. The atom at the center of the unit cell is shared between eight adjacent unit cells.

The diagonal of the unit cell can be calculated using the radius of the atom. In a BCC structure, the diagonal (d) of the unit cell is equal to four times the radius (r) of the atom.

d = 4r = 4 * 125 pm = 500 pm

To convert picometers (pm) to meters (m), we divide by 10^12:

d = 500 pm / (10^12 pm/m) = 5 x 10^-10 m

The volume of the unit cell (V) can be calculated using the formula:

V = (d^3) / (4√3)

V = (5 x 10^-10 m)^3 / (4√3) = 1.96 x 10^-22 cubic meters

Therefore, the volume of the unit cell in a body-centered cubic crystal of element X is approximately 1.96 x 10^-22 cubic meters.

Learn more about crystal structures here: brainly.com/question/31826580

#SPJ11

The order with respect to A in the given reaction is 2. The order with respect to B in the given reaction is 2. The overall reaction order is 4.

The rate law of a chemical reaction expresses how the rate of the reaction depends on the concentrations of the reactants. In the given reaction, the rate law is stated as rate = k[A]^2 [B]^2, where k is the rate constant and [A] and [B] represent the concentrations of A and B, respectively.

The order with respect to A is determined by the exponent of [A] in the rate law, which is 2 in this case. This means that the rate of the reaction is directly proportional to the square of the concentration of A. Thus, doubling the concentration of A would result in a fourfold increase in the rate of the reaction, and halving the concentration of A would lead to a decrease in the rate by a factor of four. Similarly, the order with respect to B is determined by the exponent of [B] in the rate law, which is also 2 in this case. Therefore, the rate of the reaction is directly proportional to the square of the concentration of B.

The overall reaction order is the sum of the individual orders with respect to each reactant. In this case, the order with respect to A and B is 2, and when added together, the overall reaction order becomes 4. Understanding the order with respect to each reactant and the overall reaction order is crucial for understanding the rate behavior of the reaction and designing appropriate reaction conditions or mechanisms. In this particular reaction, the rate is highly dependent on the concentrations of both A and B, with their squares contributing significantly to the overall reaction rate.

To learn more about rate law of a chemical reaction click here:

brainly.com/question/31562647

#SPJ11

The balanced equation for the neutralization reaction between NaOH and H2SO4 can be given as follows: H2SO4 + 2NaOH → Na2SO4 + 2H2OThe stoichiometry of the reaction shows that 1 mole of H2SO4 reacts with 2 moles of NaOH.

We can calculate the moles of NaOH that reacted as follows:0.164 M NaOH = 0.164 moles/Liter

Therefore, the number of moles of NaOH present in 32.63 mL can be calculated as follows:

0.164 moles/L * 0.03263 L

= 0.00535 moles

Now we know that 0.00535 moles of NaOH were present in 25.00 mL of H2SO4. Since the stoichiometry shows that 1 mole of H2SO4 reacts with 2 moles of NaOH, we can calculate the number of moles of H2SO4 that were present in 25.00 mL of H2SO4 as follows:

0.00535 moles of NaOH * 1 mole of H2SO4/2 moles of NaOH

= 0.002675 moles of H2SO4

Now that we know the number of moles of H2SO4 present in 25.00 mL of solution, we can calculate the molarity of the solution as follows:

Molarity = Moles of solute/Volume of solution (in liters)

Molarity = 0.002675 moles/0.02500 Liters

= 0.107 M H2SO4

Therefore, the molarity of the H2SO4 solution is 0.107 M.

To know more about stoichiometry, visit:

https://brainly.com/question/28780091

#SPJ11

Moles of water consumed: 2 moles. Moles of H2 produced: 1 mole. Moles of potassium required to produce 17.0 moles of H2: 17.0 moles. Moles of KOH produced if 3477.9 moles of H2O are consumed: 3477.9 moles

According to the balanced equation, 2 moles of potassium (2K) react with 2 moles of water (2H2O) to produce 2 moles of KOH (2KOH) and 1 mole of H2 (H2). Therefore, for every mole of potassium reacting, 1 mole of water is consumed and 1 mole of H2 is produced.

To calculate the moles of water consumed when one mole of potassium reacts, we use the stoichiometric coefficients from the balanced equation, which gives us 2 moles of water consumed.

Similarly, when one mole of potassium reacts, we find that 1 mole of H2 is produced.

To determine how many moles of potassium are required to produce 17.0 moles of H2, we can set up a ratio using the stoichiometric coefficients. From the balanced equation, we know that 2 moles of potassium react to produce 1 mole of H2. Therefore, we have:

2 moles of potassium / 1 mole of H2 = x moles of potassium / 17.0 moles of H2

Solving for x gives us x = 17.0 moles of potassium.

Finally, to calculate the moles of KOH produced when 3477.9 moles of H2O are consumed, we again use the stoichiometric coefficients. From the balanced equation, we know that 2 moles of KOH are produced for every 2 moles of water consumed. Therefore, we have:

2 moles of KOH / 2 moles of water = x moles of KOH / 3477.9 moles of H2O

Simplifying this gives us x = 3477.9 moles of KOH.

Learn more about stoichiometry here: brainly.com/question/28780091

#SPJ11

Answer:

The last one, Positive charge occupies a very small volume in the atom.

Explanation:

Answer:

B

Explanation:

G=gas while mass means the molecular weight

Biphenyl has a higher boiling point than naphthalene due to stronger intermolecular forces between its molecules such as dispersion forces and π-π interactions, present in the biphenyl molecule.

The higher boiling point of biphenyl compared to naphthalene can be attributed to the structural differences between the two compounds and the resultant differences in intermolecular forces. Biphenyl consists of two phenyl (C6H5) rings connected by a single bond. Each phenyl ring has a delocalized π electron system, which creates regions of electron density above and below the plane of the molecule. These π electron systems allow for strong dispersion forces and π-π interactions between adjacent biphenyl molecules. The extended surface area of the molecule and the presence of these strong intermolecular forces contribute to a higher boiling point for biphenyl.

On the other hand, naphthalene is a fused aromatic hydrocarbon composed of two benzene rings. It also exhibits dispersion forces and π-π interactions, but the molecular shape of naphthalene is different from biphenyl. Naphthalene has a planar structure with a central carbon bridge, resulting in a smaller surface area compared to biphenyl. The reduced surface area and weaker intermolecular forces in naphthalene lead to a lower boiling point compared to biphenyl.

In summary, the higher boiling point of biphenyl compared to naphthalene can be attributed to the larger surface area and stronger intermolecular forces, such as dispersion forces and π-π interactions, present in the biphenyl molecule.

To learn more about intermolecular forces click here:

brainly.com/question/31797315

#SPJ11

Answer:

Larger predators would cause the rabbit to run faster to outrun their predator, so speed is a variation. Also their environment where they might need to blend in with their surroundings so skin color.

At the point after glycolysis and the citric acid cycle, but before the electron transport chain and oxidative phosphorylation, most of the energy from the original glucose molecule is stored in NADH.

During glycolysis, a glucose molecule is partially broken down into two molecules of pyruvate, generating a small amount of ATP and NADH. The pyruvate then enters the mitochondria, where it is converted to Acetyl-CoA, which enters the citric acid cycle (also known as the Krebs cycle).

In the citric acid cycle, Acetyl-CoA is further broken down, producing NADH, ATP, and FADH2. These electron carriers (NADH and FADH2) carry high-energy electrons that are used in the electron transport chain.

Before the electron transport chain and oxidative phosphorylation, the carbon skeleton of glucose has been completely broken down to CO2, and most of the energy from the glucose molecule is stored in the high-energy electron carriers NADH and FADH2. NADH, in particular, carries a significant amount of the energy derived from glucose breakdown.

Therefore, at this stage, most of the energy from the original glucose molecule is stored in NADH.

Learn more about cellular respiration here: brainly.com/question/32872970

#SPJ11

Answer:

The wavelength of x-ray is 1 ×10⁻¹⁰ m.

Explanation:

Given data:

Frequency of xray = 3×10¹⁸ Hz

Wavelength of xray = ?

Solution:

Formula:

Speed of light = wavelength × frequency

c = λ × f

λ = c/f

This formula shows that both are inversely related to each other.

The speed of light is 3×10⁸ m/s

Frequency is taken in Hz.

It is the number of oscillations, wave of light make in one second.

Wavelength is designated as "λ" and it is the measured in meter. It is the distance between the two crust of two trough.

Now we will put the values in formula.

λ = 3×10⁸ m/s  / 3×10¹⁸ Hz

Hz = s⁻¹

λ = 1 ×10⁻¹⁰ m

The wavelength of radiation is 1 ×10⁻¹⁰ m.

The volume of a 0.540 M NaOH solution that contains 12.5 g of NaOH is approximately 0.718 L.

To calculate the volume of the solution, we can use the formula:

Volume (L) = Mass (g) / Concentration (Molarity) * Molar Mass (g/mol)

First, we need to determine the molar mass of NaOH, which is 22.99 g/mol for sodium (Na), 16.00 g/mol for oxygen (O), and 1.01 g/mol for hydrogen (H). Adding these values together gives us a molar mass of 39.99 g/mol for NaOH.

Now, we can substitute the given values into the formula:

Volume (L) = 12.5 g / 0.540 M * 39.99 g/mol

Simplifying the calculation:

Volume (L) = 0.718 L

Therefore, the volume of the 0.540 M NaOH solution that contains 12.5 g of NaOH is approximately 0.718 L.

To learn more about volume of the solution click here: brainly.com/question/14710169

#SPJ11

The density of nitrogen gas at 15°C is 1.16 g/L. When nitrogen gas is collected over water, the total pressure is equal to the sum of the vapor pressure of water and the partial pressure of nitrogen gas. The vapor pressure of water at 15°C is 12.8 torr. Therefore, the partial pressure of nitrogen gas is 732.2 torr (745 torr - 12.8 torr).

The density of nitrogen gas is calculated using the ideal gas law equation as follows:PV = nRTwhere P is the pressure in atm, V is the volume in L, n is the number of moles, R is the gas constant (0.0821 L·atm/K·mol), and T is the temperature in Kelvin (K).The volume of the container is not given in the problem. Hence, we cannot directly calculate the density. However, we can rearrange the equation to solve for density instead of volume as follows:density (ρ) = (n × M) / Vwhere n is the number of moles, M is the molar mass, and V is the volume in L.

We can assume that the volume of water displaced is negligible. Therefore, the volume of the container is equal to the volume of nitrogen gas. We can also assume that the nitrogen gas behaves ideally. Hence, we can use the ideal gas law to calculate the number of moles as follows:PV = nRTn = (PV) / RTwhere P = 732.2 torr, V = volume of the container in L, R = 0.0821 L·atm/K·mol, and T = (15°C + 273.15) = 288.15 K. Molar mass of nitrogen gas is 28 g/mol.Using these values, we can calculate the density of nitrogen gas as follows:density = (n × M) / V = (PV / RT) × M / V= (732.2 torr × V / (0.0821 L·atm/K·mol × 288.15 K)) × (28 g/mol / 1000 g/L) / V= (732.2 torr × 28 g/mol) / (0.0821 L·atm/K·mol × 288.15 K × 1000) = 1.16 g/LTherefore, the density of nitrogen gas after filling this container is 1.16 g/L.

Nitrogen gas is collected over water at 15°C. The total pressure is 745 torr. The density of nitrogen gas after filling this container can be determined using the ideal gas law equation. The total pressure is equal to the sum of the vapor pressure of water and the partial pressure of nitrogen gas. The vapor pressure of water at 15°C is 12.8 torr.

Therefore, the partial pressure of nitrogen gas is 732.2 torr (745 torr - 12.8 torr).The volume of the container is not given in the problem. However, we can use the ideal gas law to calculate the number of moles of nitrogen gas. We can also assume that the volume of water displaced is negligible and that the nitrogen gas behaves ideally. The molar mass of nitrogen gas is 28 g/mol. Using these values, we can calculate the density of nitrogen gas as 1.16 g/L.Therefore, the density of nitrogen gas after filling this container is 1.16 g/L.

The density of nitrogen gas after filling this container over water at 15°C is 1.16 g/L.

To know more about ideal gas law :

brainly.com/question/30458409

#SPJ11

The mass of iron(III) nitrate that must be dissolved in the same mass of water to produce the same depression in freezing point as that of glycine is 9.23g. When glycine dissolves in a solution, it produces depression in freezing point, which means that the freezing point of the solution is less than the freezing point of pure solvent.

Iron (III) nitrate also exhibits this property. The van't Hoff factor for iron (III) nitrate in water is 4 because it dissociates into four ions in the solution, i.e. Fe3+ and three NO3- ions. In order to calculate the mass of iron(III) nitrate required to produce the same depression in freezing point, we will use the formula:

ΔTf = Kf × molality

Where, ΔTf is the depression in freezing point Kf is the freezing point depression constant molality is the concentration of solute in solution in mol/kg. Assuming that the mass of glycine and water are both equal, we can determine the molality of the solution using the given freezing point depression value:

ΔTf = Kf × molality
-0.0255 °C = 1.86 °C/m × molality
molality = -0.0255 °C / 1.86 °C/m
molality = 0.0137 mol/kg

Now we can calculate the number of moles of glycine in the solution:

0.0137 mol/kg × 1 kg = 0.0137 mol
Since glycine is a non-electrolyte, it does not dissociate into ions and therefore has a van't Hoff factor of 1. Now we can use the van't Hoff factor of iron(III) nitrate and the molality of the solution to determine the number of moles of iron(III) nitrate required to produce the same depression in freezing point as that of glycine:

0.0137 mol × (1/4) × (x/0.1 kg) = x × 0.3438 mol/kg

Where x is the mass of iron(III) nitrate required in grams.

Solving for x, we get:

x = 9.23 g

The mass of iron(III) nitrate that must be dissolved in the same mass of water to produce the same depression in freezing point as that of glycine is 9.23g.

To learn more about van't Hoff factor visit:

brainly.com/question/30540760

#SPJ11

They all are liquid (at room temperature), all are homogeneous mixture.

Answer:

V ≈ 70.5 cm³

Explanation:

Density = Mass / Volume

Step 1: Define

Mass = 0.630 kg = 630 g

Density = 8.94 g/cm³

Volume = ?

Step 2: Substitute and Evaluate for V

8.94 g/cm³ = 630 g / V

V = 70.4698 cm³

Step 3: Simplify

We are given 3 sig figs.

70.4698 cm³ ≈ 70.5 cm³

The concentration of B at equilibrium cannot be determined solely based on the information provided. Therefore, the answer is "e. none of these."

To determine the concentration of B at equilibrium, we need to know the equilibrium constant (K) for the given reaction. The equilibrium constant is a ratio of the concentrations of the products to the concentrations of the reactants, each raised to the power of their respective stoichiometric coefficients.

However, in this case, the equilibrium constant is not given. Without the value of K, we cannot calculate the concentration of B at equilibrium. The concentration of A alone does not provide enough information to determine the concentration of B.

Therefore, the correct answer is "e. none of these," as we cannot determine the concentration of B at equilibrium based on the given information.

To learn more about equilibrium click here: brainly.com/question/32029862

#SPJ11

Answer:

Copper

Explanation: