2H₂O₂(1) + N₂H₂(1)→ 4H₂O(g) + N₂ (g) determine how many grams of N₂ are produced from the reaction of 8.92 g of H₂O₂ and 5.53 g of N₂H4.​

Answer:

P4S8 .

the chemical formula of Tetraphosporus osctasulfide is p4S8

The heat produced from 48 g Aluminium = -578

Given

Reaction

2 Al + 3 CuSO4 → 3 Cu + Al2(SO4)3 ∆H = -680 kJ

48 g of Aluminum

Required

Heat released

Solution

mol of Aluminium = mass : Ar Al

mol = 48 g : 27 g/mol

mol = 1.78

From the reaction, heat released for 2 moles Al, so for 1.78 Al, the heat released :

\(\tt \dfrac{1.7}{2}\times -680~kJ=-578~kJ\)

Dr. Trane's explanation is based on the psychodynamic perspective while Dr. Uni's explanation is based on the behavoiural perspective. The correct option is option C.

Psychodynamic perspective is a psychological approach that focuses on the unconscious mind and how it affects the behavior. According to the psychodynamic perspective, unconscious urges and conflicts that have their roots in early experiences shape how people behave. This approach is developed by Sigmund Freud.

Behavioral perspective

This is the psychological approach that focuses on observable behavior and the influence of the environment on an individual's actions. According to behaviorists, who also emphasize the significance of understanding and influencing behavior without probing interior mental processes, behavior is learnt through interactions with the environment. The early behaviourists are J.F Skinner, John B. Watson and Ivan Pavlov.

These perspectives are parts of psychoanalysis.

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Answer:

With the use of same chemicals, same gas will be produced while the use of different chemicals, different gases will be produced.

Explanation:

The same gas was produced in each assignment if the same chemicals are mixed with each other while different gases were produced in each assignment when different chemicals are allowed to mix. If every time, same chemicals and same concentration of chemicals are mixed together, the result will be the same means production of same gas but if different chemicals are allowed to mix, then the product will be the production of different gases.

Answer:

Some bacteria like rhizobium and blue green algae are able to fix nitrogen gas from the atmosphere to enrich the soil with nitrogen compounds and increase its fertility. The nitrogen-fixing bacteria and blue green algae are called biological nitrogen fixers.

Answer:

Diazotrophic bacteria or Cyanobacteria

Given parameters:

Volume of CuSO₄ = 250mL

Concentration of CuSO₄ = 2.01M

Unknown:

Mass of CuSO₄.5H₂O = ?

To solve this problem, we must write the chemical relationship between both species.;

             CuSO₄.5H₂O  →   CuSO₄ + 5H₂O

Now that we know the expression, it is possible to solve for the unknown mass.

First find the number of moles of CuSO₄;

         Number of moles  = Concentration x Volume

Take 250mL to L so as to ensure uniformity of units;

           Volume  = 250 x 10⁻³L

  Input the parameters and solve for number of moles;

        Number of moles  = 250 x 10⁻³  x  2.01 = 0.5mol

From the equation;

             1 mole of CuSO₄ is produced from 1 mole of CuSO₄.5H₂O  

So  0.5 moles of CuSO₄ will be produced from 0.5 moles of CuSO₄.5H₂O

Now let us find the molar mass of CuSO₄.5H₂O = 63.6 + 32 + 4(16) + 5(2x1 + 16)  = 249.6g/mole

Mass of CuSO₄.5H₂O = number of moles x molar mass

                                      = 0.5 x 249.6

                                     = 124.8g

The mass of CuSO₄.5H₂O is 124.8g

Each kind of scientist is matched with an aspect of the hot spring he or she is most likely to study as follows:

A scientific observation can be defined as an active acquisition of knowledge (information) through one of the sense organs, while using scientific tools and instruments.

In Science, there are two main types of scientific observation and these include the following:

A hot spring can be defined as a natural or an artificially-induced phenomena in which very hot groundwater flows out from the Earth's crust due to the heat present in the geosphere.  

In this exercise, you're required to match each kind of scientist with an aspect of the hot spring he or she is most likely to study as follows:

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Complete Question:

Match each kind of scientist with an aspect of the hot spring she or he might study.

A. Geologist

B. Ecologist

C. Sociologist

D. Meteorologist

1. Relationships between organisms and the hot spring.

2. Human behavior around the hot spring.

3. Rocks around and under the hot spring.

4. Atmosphere and weather around the hot spring.

The thing that cellular respiration and a piece of avocado turning brown is that both chemical changes.

Cellular respiration is a chemical process because there occurs the change of substances. The final byproducts of cellular respiration are ATP, water, and carbon dioxide which are result of chemical processes.

On the other hand, a piece of avocado oxidizing and turning brown is a chemical transformation that happens when the enzyme polyphenol oxidase in the fruit's cells combines with oxygen in the air. This irreversible process can be slowed down by preserving the avocado or using lemon juice.

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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.

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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:

Idon't know if this helps but I think it is a linear structure and if I am wrong I am so sorry

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. The volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. According to the balanced chemical equation, for every 2 moles of water (H2O) electrolyzed, 1 mole of oxygen gas (O2) is obtained. Since 1 mole of any gas occupies 22.4 L at standard temperature and pressure (STP), we can use the stoichiometry of the reaction to determine the volume of oxygen gas produced.

Given that 50 cm³ of gas is obtained at the anode, we need to convert this volume to liters:

50 cm³ = 50/1000 L = 0.05 L

Using the stoichiometric ratio of the balanced equation, we find that 2 moles of water produce 1 mole of oxygen gas. Therefore, 0.05 L of oxygen gas is equivalent to:

0.05 L × (1 mole/22.4 L) = 0.002232 moles

Thus, the volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

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Answer:

The polarity of a liquid refers to the separation of electric charge within the molecules of the liquid, resulting in a positive and negative end. Based on this, we can draw the following conclusion:

In conclusion, the polarity of a liquid is an important property that affects its behavior and interactions with other substances. Polar liquids have molecules with an uneven distribution of charge, resulting in positive and negative ends. This polarity influences various aspects, such as solubility, surface tension, and the ability to dissolve other polar substances. Additionally, polar liquids tend to exhibit stronger intermolecular forces, leading to higher boiling and melting points compared to nonpolar liquids. Understanding the polarity of a liquid is crucial for various fields, including chemistry, biology, and material science, as it helps explain and predict the behavior and properties of different substances in a wide range of applications.

Answer:

The polarity of a liquid refers to the separation of electric charges within the molecule, resulting in a molecule with a positive end and a negative end. The presence or absence of polarity in a liquid has significant implications for its behavior and interactions with other substances.

In conclusion, the polarity of a liquid plays a crucial role in determining its physical and chemical properties. Polar liquids, such as water, have an unequal distribution of charge within their molecules, leading to hydrogen bonding and strong intermolecular forces. These interactions give rise to properties like high boiling points, surface tension, and solubility, making polar liquids excellent solvents and essential for many biological processes.

On the other hand, nonpolar liquids, such as hydrocarbons, have a symmetrical distribution of charge and lack strong intermolecular forces like hydrogen bonding. As a result, they have lower boiling points, weaker interactions, and are typically less soluble in polar solvents. Nonpolar liquids are commonly used as solvents for nonpolar compounds and have different applications in various industries.

Understanding the polarity of a liquid is crucial in fields such as chemistry, biology, and materials science. It helps predict how substances will interact and dissolve in a given solvent, as well as how they will behave in chemical reactions. Additionally, polarity affects the physical properties of liquids, including their viscosity, conductivity, and surface behavior.

In summary, the polarity of a liquid is a fundamental characteristic that influences its behavior, solubility, and reactivity. Whether a liquid is polar or nonpolar has far-reaching consequences in various scientific disciplines and practical applications

Answer: 2.5 lit

Explanation:

The mean of the data set is approximately 4.0626, and the 90% confidence interval is [4.060925, 4.064275].

The sample mean (x) is calculated as follows:

x = (4.0620 + 4.0550 + 4.0650 + 4.0740 + 4.0550 + 4.0660) / 6

x ≈ 4.0626 (rounded to four decimal places)

The 90% confidence interval is calculated as follows;

Standard deviation (s):

(4.0620 - 4.0626)² = 0.00000036

(4.0550 - 4.0626)² = 0.00000576

(4.0650 - 4.0626)² = 0.00000006

(4.0740 - 4.0626)² = 0.00001328

(4.0550 - 4.0626)² = 0.00000576

(4.0660 - 4.0626)² = 0.00000012

average of the squared differences:

(0.00000036 + 0.00000576 + 0.00000006 + 0.00001328 + 0.00000576 + 0.00000012) / 6 ≈ 0.00000624

s = √(0.00000624)

s ≈ 0.002496

the standard error of the mean (SEM):

SEM = 0.002496 / √6

SEM ≈ 0.001018

For a 90% confidence interval, the z value is approximately 1.645.

ME = 1.645 * 0.001018 ≈ 0.001675

CI = x ± ME

CI = 4.0626 ± 0.001675

CI ≈ [4.060925, 4.064275]

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Answer:

\(n_{O_2}=3.84molO_2\)

Explanation:

Hello!

In this case, since the combustion reaction of methanol is:

\(CH_3OH+\frac{3}{2} O_2\rightarrow CO_2+2H_2O\)

In such a way, since there is 1:3/2 mole ratio between methanol and oxygen, we can compute the moles of oxygen that are needed to burn 2.56 moles of methanol as shown below:

\(n_{O_2}=2.56molCH_3OH*\frac{\frac{3}{2}molO_2}{1molCH_3OH} \\\\n_{O_2}=3.84molO_2\)

Best regards!

Answer:

Explanation:

Answer:

animal and plant are the example of eukaryotes

Answer:

Ba²+ (aq) + SO4²- (aq) --> BaSO4(s)

The net ionic equation for the formation of barium sulphate is Ba²⁺₍aq₎ + SO₄² ₍aq₎ → BaSO₄₍s₎. Therefore, option D is correct.

The inorganic substance having the chemical formula BaSO₄ is called barium sulfate. It is a tasteless, crystalline white substance that is insoluble in water. The main commercial source of barium and the materials made from it is the mineral barite, which is where it naturally occurs.

The use of barium sulfate aids in the diagnosis or discovery of issues with the esophagus, stomach, and bowels. It is a contrast material for radiography. To make the various bodily components clearly visible, contrast chemicals are used.

A barite-derived metallic compound with a silvery white color. In barium swallows and barium enemas, it is diluted with water to aid visualize the digestive tract on an x-ray.

Thus, option D is correct.

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Answer: Density is a measure

Explanation:  The more squashed together an object’s particles are, the denser it is.

The difference in lengths between the steel and copper bars at 41.0°C is 8.729 mm.

The difference in the lengths of the two bars can be calculated using the linear expansion equation;

ΔL = α × L × ΔT

where; ΔL = Difference in length

α = Coefficient of linear expansion

L = Initial length

ΔT = Change in temperature

Given; Initial length (L) = 1.500 m

Change in temperature (ΔT) = 41.0°C - (-12.0°C) = 53.0°C

The coefficient of linear expansion for steel is typically around 11 x 10⁻⁶ /°C, and for copper, it's around 16 x 10⁻⁶ /°C.

For the steel bar;

α (steel) = 11 x 10⁻⁶ /°C

For the copper bar;

α (copper) = 16 x 10⁻⁶ /°C

Now we can calculate the difference in lengths for both bars.

For the steel bar;

ΔL (steel) = α (steel) × L × ΔT

ΔL (steel) = 11 x 10⁻⁶ /°C × 1.500 m × 53.0°C

For the copper bar;

ΔL (copper) = α (copper) × L × ΔT

ΔL (copper) = 16 x 10⁻⁶ /°C × 1.500 m × 53.0°C

Converting the length difference from meters to millimeters (1 m = 1000 mm):

ΔL (steel) = 11 x 10⁻⁶ /°C × 1.500 m × 53.0°C × 1000 mm/m = 8.729 mm (rounded to three decimal places)

ΔL (copper) = 16 x 10⁻⁶ /°C × 1.500 m × 53.0°C × 1000 mm/m = 12.168 mm (rounded to three decimal places)

Therefore, the difference in the lengths of the two bars will be 8.729 mm.

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Answer:

The empirical formula for C12 H24 O6 is C2 H4 O.

Answer:

We are given the formula of the compound:

C12H24O6

The empirical formula of a molecular formula is the lowest whole number ratio between the number of atoms of each element

The ratio of C to H to O in the given formula is :

12 : 24 : 6

we notice that all 3 of the numbers have 6 in common. Dividing all three of the numbers by 6, we get:

2 : 4 : 1

Hence, the ratio of Carbon to Hydrogen to Oxygen in the empirical formula of the given compound is 2 : 4 : 1 ,

Empirical Formula = C2H4O

Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.

Alcohol can swiftly cross the blood-brain barrier after it is ingested, having an impact on the brain and neurological system. Depending on the quantity and frequency of drinking, alcohol's effects on the brain can range from minor disturbances in judgment and coordination to more serious consequences including loss of consciousness and, in the worst circumstances, death.

Long-term changes in brain structure and function, such as cognitive impairment and a higher chance of developing specific neurological and mental illnesses, can also result from chronic alcohol consumption.

Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.

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The losses in the pipe increases the power requirement of the pipe to

maintain a given flowrate.

Responses (approximate value);

(a) 2.598 m/s

(b) 181,058.58

(c) 0.025

(d) 227:1000

(e) 1,216.67 W

The given parameters are;

Pump efficiency, η = 80%

Length of the pipe, L = 15 m

Cross-sectional diameter, d = 7 cm

Reservoir temperature, T = 20°C = 293.15 K

\(\mathbf{K_{entrance}}\) ≈ \(\mathbf{K_{exit}}\) ≈ 1.0, \(\mathbf{K_{elbow}}\) ≈ 0.4

Volumetric flow rate, Q = 10 Liters/s = 0.01 m³/s

Surface roughness, ∈ = 0.15 mm

(a) The cross sectional area of the pipe, A = π·r²

Where;

\(r = \mathbf{\dfrac{d}{2}}\)

Which gives;

\(r = \dfrac{0.07 \, cm}{2} = \mathbf{0.035 \, cm}\)

\(Average \ water \ velocity, \ v =\mathbf{ \dfrac{Q}{A}}\)

Therefore;

\(v = \dfrac{0.01}{ \pi \times 0.035^2} \approx 2.598\)

(b) The viscosity of water at 20°C is 0.001003 kg/(m·s) given as follows;

Density of water at 20°C, ρ = 998.23 kg/m³

Reynolds' number, Re, is found as follows;

\(Re = \mathbf{\dfrac{\rho \cdot V \cdot D}{\mu}}\)

Which gives;

(c) The friction factor is given by the following formula;

\(\dfrac{1}{\sqrt{f} } = \mathbf{-2.0 \cdot log \left(\dfrac{\epsilon/D}{3.7} + \dfrac{5.74}{Re^{0.9}} } \right)}\)

Which gives;

(d) Friction head loss is given as follows;

\(h_f = \mathbf{f \times \dfrac{L}{D} \times \dfrac{V^2}{2 \cdot g}}\)

Which gives;

\(h_f = 0.025 \times \dfrac{15}{0.07} \times \dfrac{2.598^2}{2 \times 9.81} \approx \mathbf{1.84}\)

\(Other \ head \ losses, \ h_l= \sum K \cdot \dfrac{V^2}{2}\)

Which gives;

\(h_l=(1 + 1+0.4) \times \dfrac{ 2.598^2}{2} \approx \mathbf{8.0995}\)

Ratio between friction head loss and other head loss is therefore;

(e) The power required P is found as follows;

\(P= \mathbf{ \dfrac{\rho \cdot g \cdot Q \cdot H}{\eta}}\)

Which gives;

\(P= \dfrac{998.23 \times 9.81 \times 0.01 \times (1.84 + 8.0995)}{0.8} \approx \mathbf{ 1216.67}\)

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Answer:

physical and chemical.

If you are on 4.16 Chemical Reactions and have 18 questions, then go to the following on Quizlet for further help. Thanks and good luck!

Quizlet - "4.6 Chemical Reactions UT"

h t t p s : / / q u i z l e t . c o m / _ c 7 3 1 u j ? x = 1 q q t & i = 3 8 n a a s

All the given chemical reactions are considered to be chemical change as they are accompanied  by change in state and even evolution of gases.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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The heat capacity for the metals are;

Aluminum -  0.89

Copper - 0.11

Iron - 0.44

Lead - 0.12

The specific heat of a substance is denoted by the symbol "C" and is typically measured in units of J/g·°C (joules per gram per degree Celsius) or cal/g·°C (calories per gram per degree Celsius).

The specific h

We have that;

For Aluminum;

c = 4.184 * 39.85 * 4.7/11.98 * 72.9

= 783.6/873.3

= 0.89

For Copper;

c =  4.184 * 12.14 * 1.9/12.14 * 75.4

= 96.5/915.3

= 0.11

For Iron

c =  4.184 * 40.24 * 2.4/12.31 * 75.1

= 404.1/924.5

= 0.44

For Lead

c = 4.184 * 39.65 * 0.7/12.46 * 76.7

c = 116.1/955.68

= 0.12

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