What was the practical effect of not having a legal identity

Answer:

Any unapposed interaction that will change the motion of an object.

Explanation:

My physics teacher had us write this down last week.

\(C_4H_1_0\) has fewer moles, it will be used up first. Therefore, the answer is B) \(C_4H_1_0\), butane.

The balanced equation shows that for every 13 moles of \(O_2\) reacted, 2 moles of \(C_4H_1_0\) will be used up. Therefore, we need to determine which reactant has fewer moles.

First, we need to convert the given masses to moles.

Moles of \(O_2\) = 78.1 g / 32 g/mol = 2.44 moles
Moles of \(C_4H_1_0\) = 62.4 g / 58 g/mol = 1.08 moles

Since \(C_4H_1_0\) has fewer moles, it will be used up first. Therefore, the answer is B) \(C_4H_1_0\), butane.

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At volume 6.78ml, pH will be equal to pKa of the acid.

According to the Henderson- Hasselbach equation,

pH= pKa + log {A-}/ {HA}

where {A-} is the concentration of conjugate base and

{HA} is the concentration of weak acid

At the equivalence point, the volume of base added is just enough to exactly neutralize all the acid.

At one half of this volume of added base, called the half equivalence point, enough has been added to neutralize half of the acid. Since, half of the acid reacted to form A-, the concentration of A- and HA-, at the half equivalence point are the same.

ph= PKA+log1

pH= pKa (log1=0)

Therefore, V eq = 13.57ml

V 1/2 eq= 13.57/2

=6.78ml

Hence, at volume 6.78ml, pH will be equal to pKa of the acid.

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Answer:

TRUE

Explanation

Negative punishment's or  reinforcement .

Negative reinforcement comes as a result of failing to take the necessary precautional measures , whether intentional or unintentional .

Forgetting is a natural circumstance hence if one forgets it means in the first place he has by passed the protocols anyway and he has to take the consequences  .

Sometimes it may be ignorance since it is in common knowledge to turn off  any machine and if possible you should unplug it from the power supply to avoid any shocks which may even be fatal if the source of power does not have mechanisms to control such situations i.e. shocks and power surges .

Psychological when one gets such a punishments he will always remember the ordeal since it inflicted pain on him and he will always take precautional measures before handling an electronic or power sources .

Answer:false

Explanation:

The oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.

In the reaction represented by the Cr₂O₇²⁻ ion, the element chromium (Cr) is reduced. Its oxidation number changes from +6 to +3.

In the Cr₂O₇²⁻  ion, each oxygen (O) atom has an oxidation number of -2. The overall charge of the ion is 2-, which means the total oxidation numbers of all the atoms should add up to -2. Since there are seven oxygen atoms, their total oxidation number is (-2) × 7 = -14.

To determine the oxidation number of chromium (Cr), we can set up the following equation;

2(Cr) + 7(-2) = -2

Simplifying the equation, we have;

2Cr - 14 = -2

By solving for Cr, we get;

2Cr = 12

Cr = 6

Initially, the oxidation number of chromium is +6. In the reaction, it is reduced, meaning its oxidation number decreases. The final oxidation number of chromium is +3.

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14.0067 u  is the molecular mass of Nitrogen.

What is molecular mass ?

Molar mass is the mass of one mole of a substance, defined as its atomic or molecular mass in grams.  It is defined as the number of units (atoms, molecules, ions, etc.) in a substance that contains the same number of units as 12 grams of pure carbon-12. The molar mass of a substance is important because it provides a conversion factor between the  mass of a substance and the number of moles of a substance, allowing chemical reactions and composition of compounds to be more easily calculated. Molar mass can be calculated by summing the atomic masses of all atoms in a molecule of a substance. For example, the molar mass of water (H2O) is 18.015 g/mol. This means that 1 mole of water weighs 18.015 grams .

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We have that the the liquid is

From the question we are told

Generally the equation is

2C_2H_5OH------CH3CH_2O-CH_2CH_3+H_20

Therefore

with ethanol at 140oC

The product is diethyl ethen

The reaction at 170 ethylene will give

C_2H_5OH-------CH_2=CH_2+H_2O( at a condition of H_2SO4 as catalyst and temp 170)

Therefore

The the liquid is

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Answer:

8

Explanation:

trust

Answer:

c)4 neutrons

Explanation:

The atomic mass of Lithium is 7.

we know,

atomic mass=no. of proton+ no. of neutron

So, no. of neutron = atomic mass - no. of proton=7-3=4

Note: Atomic number is the number of protons.

Hope, this helps you.

A person taking exogenous thyroid hormone would have increased thyroxine and decreased TRH (thyrotropin-releasing hormone) levels while taking this pill.

This is because the exogenous thyroid hormone provides additional thyroxine, leading to higher levels in the body. In response, the body's feedback mechanism detects the increased thyroxine levels and reduces the production of TRH to maintain hormonal balance.

When a person takes exogenous thyroid hormone (thyroxine), it means they are supplementing their body's natural thyroid hormone levels with an external source. In this scenario, if a person takes this pill, two specific changes are expected:

1. Increased thyroxine levels: Thyroxine is the primary hormone produced by the thyroid gland, and it plays a crucial role in regulating metabolism and other bodily functions. By taking exogenous thyroxine, the person's overall thyroxine levels increase in their body. This increase in thyroxine helps to compensate for any deficiency or imbalance in the body's natural thyroid hormone production.

2. Decreased TRH (thyrotropin-releasing hormone) levels: TRH is a hormone released by the hypothalamus, a region in the brain, and it stimulates the production and release of thyroid-stimulating hormone (TSH) from the pituitary gland. TSH, in turn, stimulates the thyroid gland to produce and release thyroxine. However, when a person takes exogenous thyroxine, the increased levels of thyroxine in the bloodstream provide negative feedback to the hypothalamus and pituitary gland. This negative feedback signals the hypothalamus to decrease the release of TRH, which subsequently leads to decreased levels of TRH in the body.

Overall, taking exogenous thyroid hormone results in increased thyroxine levels and decreased TRH levels due to the negative feedback loop involved in the regulation of thyroid hormone production and release. These changes aim to restore and maintain the balance of thyroid hormone levels in the body.

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The molecular weight of 4-cyclohexene-cis-1,2-dicarboxylic anhydride is 168.18 g/mol.

The molecular weight of 4-cyclohexene-cis-1,2-dicarboxylic anhydride can be calculated by adding up the atomic weights of all the atoms present in its chemical formula. The formula for this compound is C₉H₈O₃.

To calculate the molecular weight, we need to add the atomic weights of each of the atoms in this formula. Carbon (C) has an atomic weight of 12.01, hydrogen (H) has an atomic weight of 1.01, and oxygen (O) has an atomic weight of 16.00.

So, the molecular weight of 4-cyclohexene-cis-1,2-dicarboxylic anhydride is:

9(C) x 12.01 + 8(H) x 1.01 + 3(O) x 16.00 = 168.18 g/mol

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The half-life of Polonium-210 is 417 days.

We know that the half-life of polonium is 139 days. This means that half of the original amount of polonium will disintegrate every 139 days. Now, suppose that the original amount of polonium is P0. After 139 days, half of the amount will be disintegrated. This means that the amount remaining is P0/2. Again, after another 139 days, half of the remaining amount will disintegrate. This means that the amount remaining will be P0/4. Similarly, after 3 half-lives, which is 3 x 139 = 417 days, the amount remaining will be:

P0/2³ = P0/8

This means that 7/8 of the original amount of polonium has disintegrated.

Therefore, 95% of the original amount has disintegrated after 139 days x (3 + 0.2)

half-lives = 417 days.

Therefore, the duration for which you will be able to use the polonium after the sample arrives is 417 days.

The question you wrote is incomplete, maybe the complete question is:

Polonium-210

The half-life of polonium is 139 days, but your sample will not be useful to you after 95% of the radioactive nuclei present on the day the sample arrives has disintegrated. For about how many days after the sample arrives will you be able to use the polonium?

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The empirical formula for the ccompound, given the data is C₇H₈

The mass OC carbon in the compound can be obtained as follow:

Mass of C = (12 / 44) × 4.10

Mass of C = 1.118 mg

Mass of H = (2 / 18) × 0.959

Mass of H = 0.107 mg

The empirical formula can be obtained as follow:

Divide by their molar mass

C = 1.118 / 12 = 0.093

H = 0.107 / 1 = 0.107

Divide by the smallest

C = 0.093 / 0.093 = 1

H = 0.107 / 0.093 = 1.15

Multiply through by 7 to express in whole number

C = 1 × 7 = 7

H = 1.15 × 7 = 8

Thus, the empirical formula of the compound is C₇H₈

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Answer:

Oxidation: The combustion of food and releasing energy in the presence of oxygen is called oxidation. Breathing: The process of taking oxygen and throwing carbon dioxide is called breathing. Respiration: The process of burning of food taken by organisms in the body to release energy is called respiration.####

Answer:

These are the answers:.

Explanation:

Respiration has many meanings.

Hope it helps.

Answer:

Depending on the deformity it will depend on the amount of the ice that is melted,it the majority is melted that is relevant to the heated liquid melting the ice,so yes only the water formalities of the melted ice.

A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.

We have 2 containers connected by a valve.

One container has a volume of 3.00 L and contains O₂ at 4.00 atm. The other container has a volume of 2.00 L and contains Ne at 2.00 atm.

When the valve is opened, the total volume is the sum of the 2 containers.

\(V_2 = 3.00 L + 2.00 L = 5.00 L\)

Assuming constant temperature and ideal behavior, we can calculate the final pressure of each gas using Boyle's law.

O₂

\(P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{4.00atm \times 3.00L}{5.00L} = 2.40atm\)

Ne

\(P_1 \times V_1 = P_2 \times V_2\\\\P_2 = \frac{P_1 \times V_1}{V_2} = \frac{2.00atm \times 2.00L}{5.00L} = 0.800atm\)

The final pressure in the container will be the sum of the final pressures of the gases.

\(P = 2.40 atm + 0.800 atm = 3.20 atm\)

A 3.00-L container with O₂ at 4.00 atm is connected to a 2.00-L container with Ne at 2.00 atm, resulting in a final pressure of 3.20 atm in the container.

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The balanced equation for the reaction is N2(g) + O2(g) → 2NO(g).

The given value for the enthalpy change of the reaction is ΔH = 180.6 kJ. This value represents the heat released per mole of N2 reacted.

To determine the number of moles of NO produced, we need to calculate the moles of N2 reacted. Since the reaction is exothermic, the heat absorbed by the reaction is negative (-2976 kJ). However, it is not physically possible to have a negative number of moles. Therefore, we can conclude that no NO is produced in this case because the heat absorbed is insufficient to drive the reaction.

Using the equation ΔH = -2976 kJ/mol N2, we can set up a proportion:

180.6 kJ/1 mol N2 = -2976 kJ/x mol N2

Solving for x, we find:

x = (-2976 kJ * 1 mol N2) / (180.6 kJ) ≈ -16.46 mol N2

Since the reaction produces 2 moles of NO for every mole of N2, the number of moles of NO produced is twice the number of moles of N2:

Moles of NO = 2 * (-16.46 mol) ≈ -32.92 mol

The given reaction is N2(g) + O2(g) → 2NO(g), and the enthalpy change of the reaction is ΔH = 180.6 kJ. If the reaction absorbs 2976 kJ of heat, the number of moles of NO that can be produced can be calculated. By setting up a proportion, we find that approximately -16.46 moles of N2 are reacted. Since the reaction produces 2 moles of NO for every mole of N2, the calculated moles of NO would be approximately -32.92. However, negative moles are not physically possible, indicating that no NO can be produced in this case due to insufficient heat absorbed by the reaction.

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By using the specific heat capacity of water, the temperature of the water in the cup is found to reach 38.5℃ assuming the cup absorbs negligible heat as it is a perfect insulator.

The specific heat capacity of a substance is defined as the amount of heat (J) absorbed per unit mass (kg) when its temperature rises 1 K (or 1 °C).

The specific heat capacity of a solid is determined by its mass, temperature change, and solid nature.

Specific heat capacity is useful in calculating processing temperatures and the amount of heat required for processing, as well as in distinguishing between two polymeric composite materials.

No. of moles of CaO available = 10.1 / 56 = 0.18 mol

Since 1 mol reactant supplies 64.8 kJ, thus 0.18 mol gives = 11.69 kJ

Therefore, we have 11.69 kJ heat available

Now,

ΔH = mCΔT

where,

ΔH = heat supplied

C = specific heat

ΔT = rise in temperature

Therefore,

ΔT = ΔH/mC = 17.8

Thus,

Final temperature = 18 + 17.8 = 35.8℃

Result:

Hence, (B) 35.8℃ is the temperature of the water in the cup.

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Answer:

The balanced equation is Ca(OH)2 + (NH4)2SO4 → CaSO4 + 2NH3 + 2H2O

Explanation:

The balanced chemical equation for the reaction between calcium hydroxide (Ca(OH)2) and ammonium sulfate ((NH4)2SO4) is:

Ca(OH)2 + (NH4)2SO4 → CaSO4 + 2NH3 + 2H2O

In this reaction, calcium hydroxide reacts with ammonium sulfate to produce calcium sulfate, ammonia, and water.

Let's go through the process of balancing the equation:First, let's balance the calcium (Ca) atoms. There is one Ca atom on the left side and one Ca atom on the right side, so it is already balanced.Next, let's balance the sulfur (S) atoms. There is one S atom on the left side and one S atom on the right side, so it is also balanced.

Now, let's balance the hydrogen (H) atoms. There are two H atoms in each calcium hydroxide molecule, so we have 2H atoms on the left side. To balance this, we need to have 4H atoms on the right side. We can achieve this by adding a coefficient of 2 in front of H2O:

Ca(OH)2 + (NH4)2SO4 → CaSO4 + 2NH3 + 2H2O

Now, let's balance the oxygen (O) atoms. There are 2O atoms in each calcium hydroxide molecule, so we have 4O atoms on the left side. On the right side, there are 4O atoms from CaSO4 and 2O atoms from H2O, giving us a total of 6O atoms. To balance this, we need to add a coefficient of 3 in front of CaSO4:

Ca(OH)2 + (NH4)2SO4 → 3CaSO4 + 2NH3 + 2H2O

Now, let's check the nitrogen (N) atoms. There are two N atoms on the left side, and two N atoms on the right side, so they are balanced.Finally, let's check the charge balance. On the left side, we have two ammonium ions ((NH4)+), which gives a total charge of +2. On the right side, we have three calcium ions (Ca2+), which also gives a total charge of +2. So, the charges are balanced.

The balanced equation is:

Ca(OH)2 + (NH4)2SO4 → 3CaSO4 + 2NH3 + 2H2O

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we compare the moles of aluminum oxide produced from each reactant, and the smaller value will be the limiting reactant. The number of moles of aluminum oxide produced will be equal to the moles obtained from the limiting reactant.

To determine the number of moles of aluminum oxide produced, we need to calculate the number of moles of aluminum (Al) and oxygen (O2) and then determine the limiting reactant.

The balanced equation for the reaction is:

4 Al + 3 O2 -> 2 Al2O3

First, let's calculate the number of moles of aluminum (Al):

Molar mass of Al = 26.98 g/mol

Mass of Al = 10.0 grams

Number of moles of Al = Mass of Al / Molar mass of Al

Number of moles of Al = 10.0 g / 26.98 g/mol

Next, let's calculate the number of moles of oxygen (O2):

Molar mass of O2 = 32.00 g/mol

Mass of O2 = 19.0 grams

Number of moles of O2 = Mass of O2 / Molar mass of O2

Number of moles of O2 = 19.0 g / 32.00 g/mol

Now, we need to determine the limiting reactant by comparing the moles of aluminum and oxygen. The reactant that produces fewer moles of aluminum oxide will be the limiting reactant.

From the balanced equation, we know that the stoichiometric ratio of aluminum to aluminum oxide is 4:2, and the stoichiometric ratio of oxygen to aluminum oxide is 3:2.

Let's calculate the moles of aluminum oxide that can be produced from both reactants:

Moles of Al2O3 from Al = (Number of moles of Al) x (2 moles of Al2O3 / 4 moles of Al)

Moles of Al2O3 from O2 = (Number of moles of O2) x (2 moles of Al2O3 / 3 moles of O2)

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Energy sources have different advantages and disadvantages such as their impact on the natural environment, their high costs, their maintenance and their renewability.

There are many sources of energy available to power our daily lives. Here are four of the most commonly used sources, along with their advantages and disadvantages:

Fossil fuels have been the primary source of energy for centuries. They are reliable and provide a large amount of energy for a relatively low cost. However, the process of extracting, transporting and burning these fuels has serious environmental consequences. They are finite resources, and the increasing demand for them is leading to resource depletion, price volatility, and geopolitical conflicts.

Nuclear energy is a reliable, low-carbon source of energy that can generate large amounts of electricity. It does not produce greenhouse gases or other air pollutants, which makes it an attractive alternative to fossil fuels. However, nuclear accidents can have devastating environmental and human impacts. The radioactive waste produced by nuclear power plants also poses a significant challenge to disposal and storage.

Solar energy is a clean, renewable source of energy that is increasingly popular. It does not produce any emissions or pollution, and the costs of installation have decreased significantly in recent years. However, solar power generation is limited by weather conditions and geographic location. It also requires a significant initial investment and a large amount of space.

Wind energy is another clean, renewable source of energy that is growing in popularity. It is also relatively inexpensive and can generate a significant amount of electricity. However, like solar power, wind power generation is dependent on weather conditions and geographic location. Wind turbines can also be noisy and can impact wildlife and their habitats.

In conclusion, all sources of energy have advantages and disadvantages. Fossil fuels have been the primary source of energy for many years, but their environmental impact is becoming increasingly clear. Nuclear energy is a low-carbon source of energy, but poses significant risks. Solar and wind energy are both clean and renewable, but have limitations in terms of weather and geographic location. To achieve a sustainable energy future, we need to continue developing and implementing a mix of renewable and non-renewable energy sources while minimizing their negative impacts on the environment and society.

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Answer:

23

Explanation:

Answer:

0.118m

Explanation:

Answer:

a. The chemical symbols represent the chemical element and are 1 to 2 letters long.

Example: Er- Erbium

b. The chemical formulas identify each element by it's chemical symbol and indicates the proportionate number of atoms in each element.

Example: Salt- NaCI

c. A chemical equation is the symbolic equation of a chemical reaction in the form of symbols and formulas.

Example: H2+O=H2O (One water molecule)

Before using the flask, inspect it for cracks or imperfections. Use a clamp for stability when suspending the flask on a ring stand. Never heat a flask that is closed.

In a laboratory, glassware is the most prevalent item. Kitchen glassware used in homes is very different from laboratory glassware, which is made for specific uses and necessitates careful handling. It's vital to remember that scientific equipment, such as glassware, should only be used in laboratories and should never be utilized outside of the home.

Heat must be added to liquid mixes in decreased temperatures for rotary vacuum evaporators. Apply tape or screen protectors to the flask's spherical bottom to reduce harm from inadvertent breaks. Additionally, the recommended vacuum limitations shouldn't be exceeded.

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We can see from the calculation of the number of moles of the neon that we are going to have about  2.2 moles

The mole is a unit of measurement for substance amounts in chemistry. One mole is the volume of a substance that contains the same number of elementary particles as there are in 12 grams of carbon-12. These particles can be atoms, molecules, ions, or electrons. Avogadro's number, or about 6.022 x 1023 particles per mole, is the quantity of things.

We know that;

1 mole of the Ne occupies 22.4 L

x moles will occupy 48.41L

x = 2.2 moles

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The coefficient for sodium in the balanced equation would be 1.

When balancing a chemical equation, you want to make sure that the number of atoms of each element is the same on both sides of the equation. To do this, you can follow these steps:

          Na + Cl2 -> NaCl

     On the left side, there is 1 Na and 2 Cl.

      On the right side, there is 1 Na and 1 Cl.

        Na + Cl2 -> 2 NaCl

Thus, the coefficient of sodium is 1.

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To calculate the pH at equivalence in the titration of nitrous acid (HNO2) with NaOH, we need to determine the amount of nitrous acid and sodium hydroxide at the equivalence point and then calculate the resulting pH.

First, let's find the moles of HNO2 initially present in the 230.0 mL solution:
moles of HNO2 = volume (L) × concentration (M) = 0.2300 L × 0.0532 M = 0.012236 mol. Since the stoichiometry of the reaction is 1:1 between HNO2 and NaOH, the number of moles of NaOH required to reach the equivalence point is also 0.012236 mol.Now, let's calculate the total volume of the solution at the equivalence point. We assume that the total volume equals the initial volume plus the volume of NaOH solution added: total volume = 230.0 mL + volume of NaOH solution added. At the equivalence point, the moles of NaOH added equals the moles of HNO2 initially present. So we can use this information to find the volume of NaOH solution added: moles of NaOH = 0.012236 mol

concentration of NaOH = 0.2981 M
volume of NaOH solution added = moles / concentration = 0.012236 mol / 0.2981 M = 0.04111 L = 41.11 mL
The total volume at the equivalence point is 230.0 mL + 41.11 mL = 271.11 mL.Since the stoichiometry of the reaction is 1:1, the concentration of HNO2 at the equivalence point can be calculated as follows:
concentration of HNO2 = moles / total volume = 0.012236 mol / 0.27111 L = 0.0451 M
Now, we can calculate the pH at equivalence using the pKa of nitrous acid (HNO2): pH = pKa + log([NaOH] / [HNO2])
pKa = 3.35

[NaOH] = concentration of NaOH = 0.2981 M

[HNO2] = concentration of HNO2 = 0.0451 M
pH = 3.35 + log(0.2981 / 0.0451) = 3.35 + log(6.606)
Using logarithm properties, we can calculate: pH ≈ 3.35 + 0.82 ≈ 4.17

Therefore, the pH at equivalence in the titration of nitrous acid (HNO2) with NaOH is approximately 4.17 (rounded to 2 decimal places).

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Answer: 2.

Explanation: Because, if you multiply 1.22 by 0.91 or .91, you’ll get 1.1102.

*If this answer doesn’t help, let me know so I can configure this.