Why is it necessary to know the temperature of the reactants and the products of a reaction in order to determine change in the Gibbs free energy of the reaction

44.44 grams of hydrogen are produced in this equation

This can be shown as :

Let's start by balancing the equation.

We can see that, as written, we have one oxygen coming in, but two (O2) on the product side.  

Let's try making it 2 H2O and see what happens:

That took care of the O's, but now we have two extra H's coming in.  So let's add a "2" to the H2 on the product side:

Now it is balanced.  4 hydrogens and 2 oxygens coming in, and 4 hydrogens and 2 oxygens going out.

Now we can calculate the amounts of both products.

We need to find the percent by mass of both hydrogen and oxygen in the water.

Since the formula for water is H2O, take the masses off of the periodic table: 2x1g for hydrogen (because there are 2 H in the formula); 1x 16g for oxygen (because there is 1 O in the formula), added together for a total of 18g.

Hydrogen’s Percentage is :

Oxygen's Percentage is :

Thus, Out of 50g of water, that makes 44.4g of Oxygen and 5.56 g of Hydrogen.

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Answer:

Scandium

Explanation:

According to the question to administer 160 mg of ibuprofen, you need 8 ml of Children's Motrin.

Ibuprofen is a non-steroidal anti-inflammatory drug (NSAID) commonly used for pain relief, fever reduction, and inflammation reduction. It is one of the most commonly used medications for these purposes. Ibuprofen is available in both prescription and over-the-counter forms, and is most commonly sold as tablets, capsules, and chewable tablets. Ibuprofen works by blocking the production of certain chemicals in the body that cause pain, fever, and inflammation.

The conversion factor to solve this problem is 1 ml of Children's Motrin for every 20 mg of ibuprofen. This is because 5 ml of Children's Motrin contains 100 mg of ibuprofen, so dividing 100 by 5 will give you the conversion factor of 1 ml for every 20 mg. Therefore, to administer 160 mg of ibuprofen, you need 8 ml of Children's Motrin.

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Self -driving cars are just like any other human invention. With respect to efficiency, every human invention has always been progressive. Hence, It is right to state that as far as ethical dilemmas  are concerned, there is nothing wrong with self-driving cars.

An ethical dilemma is a situation (more of a problem) where there is a conflict of tension between two opposition options each of which are not good ethically.

The above question is like asking, "why are C-19 vaccines not unethical?".

It is to be noted that most if not all inventions of man are amoral. Self-Driving cars are not intentionally created to destroy property or lives. As with most inventions, the damage is done in how they are used.

In the age of capitalism, there is yet to be any organization that is not biased economically in favor of itself.

The best that the government can do is to set up a team of industry experts that understand how the self-driving cars operate to audit, control, and check what cars are released for legal use on the streets.

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22.4L

of any gas contains 1 mol of that gas.

50.75g/10L*22.4L/1 mol= 113.68g/mol- this is the mole weight of your gas

1 mol/113.68g*129.3g=1.137403 mol

Set up a ratio

1.137403mol/x L=1 mol/22.4 L

X=25.477827L, or with sig figs, x=25.5L

The compound with the smallest lattice energy would be (b) RbCl, as it has the largest cation and anion and the lowest charge density.

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Answer: its D ! The arrows to the right of Earth should point up.

Explanation:

i took quiz

Answer:

its D i think

Explanation:

Answer:

the water is not warm enough for her

Explanation:

Given that

Her preferred temperature = 82°F

Thermometer in water reads = 24°C

Convert the preferred temperature to °C

°C=5/9 (82-32)

°C = 27.8 °C

Hence the water is not warm enough for her

The water is not warm enough for her to swim in.

We have to convert Emma's preferred temperature to °C

°C=  5/9 x (F - 32)

°C=5/9 (82-32)

°C = 27.8

Therefore the temperature is 27.8°C

This means that the temperature of the water is not warm enough for her

to swim in.

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Answer:

I believe its an NH4^+ ion & an NO3^- ion

Explanation:

hope this helps!

Answer:

5/8 M

Explanation:

NaOH + HCl ====> NaCl + H2O

in 25 mL of 0.5M acid, we have 1/80 Mol of HCl

it mean we must have 1/80 Mol of NaOH.

20 mL = 1/50 L

(1/80)Mol / (1/50)L = 5/8 M

Answer:

red dwarf

Explanation:

Answer:

D

Explanation:

Answer:To calculate the concentration of the Fe(NO3)3 solution after dilution, we can use the formula:

Explanation:

C1V1 = C2V2

C1 = Initial concentration of the solution

V1 = Initial volume of the solution

C2 = Final concentration of the solution

V2 = Final volume of the solution

Initial concentration (C1) = 3.0 M

Initial volume (V1) = 80 mL

Final volume (V2) = 1500 mL

Using the formula, we can solve for C2:

C1V1 = C2V2

(3.0 M)(80 mL) = C2(1500 mL)

Rearranging the equation to solve for C2:

C2 = (C1V1) / V2

C2 = (3.0 M)(80 mL) / 1500 mL

C2 ≈ 0.16 M

Therefore, the concentration of the Fe(NO3)3 solution after dilution is approximately 0.16 M.

we have an initial solution of Fe(NO3)3 with a concentration of 3.0 M and a volume of 80 mL. The goal is to dilute this solution to a final volume of 1500 mL and determine the concentration of the diluted solution.

To do this, we can use the dilution formula: C1V1 = C2V2, where C1 and V1 represent the initial concentration and volume, and C2 and V2 represent the final concentration and volume.

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Answer:

Speed =Distance /Time =1000/360=2.78m/s

The volume of 0.2M NaOH required to bring the pH of 20 mL of 5% acetic acid solution to 4.74, which is the pKa of acetic acid, is 5.85 mL.

Given that,Volume of acetic acid solution = 20 mLConcentration of acetic acid solution = 5%pKa of acetic acid = 4.74Volume of NaOH solution = ?Molarity of NaOH solution = 0.2MHere, we have to find out the volume of NaOH solution required to bring the pH of the given acetic acid solution to the pKa of acetic acid.

Now, let’s substitute the values in the Henderson-Hasselbalch equation;pH = 4.74 = pKa + log ([4.23 × 10-6]/[0.0005])pH = 4.74 = 4.74Hence, the volume of 0.2M NaOH required to bring the pH of 20 mL of 5% acetic acid solution to 4.74, which is the pKa of acetic acid, is 5.85 mL.

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Answer: equivalent amounts of sodium hydroxide and a solution of sodium hydrogen carbonate

Explanation:

Density is defined as the measure of the amount of mass in a substance per unit of volume.

In simpler terms, it is the amount of "stuff" (mass) packed into a given amount of space (volume). The formula for density is density = mass/volume, with units typically expressed in grams per milliliter (g/mL) or kilograms per cubic meter (kg/m³). A substance with a high density has more mass per unit volume than a substance with a low density. Density is an important property in physics, chemistry, and materials science, as it can help identify substances and predict their behavior in various situat

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-The complete question is, What is the best definition of density.--

From the arrangement of the options,  Solution A and Solution D are unsaturated.

In a saturated solution, the rate at which the solute dissolves equals the rate at which it precipitates or crystallizes. This indicates that under the existing circumstances, no more solute can be dissolved in the solvent.

Solution A:

Amount of solute added: 20 g

Solubility of solute: 37 g/100 g H₂O

Since the amount of solute added is less than the solubility, Solution A is unsaturated.

Solution D:

Amount of solute added: 7 g

Solubility of solute: 4 g/100 g H₂O

The amount of solute added is less than the solubility, so Solution D is unsaturated.

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C6H14 has a molecular weight of 86.18 g/mol (612.01 + 141.01) g/mol.

Weight is a measurement of the force of gravity acting on an object. It is inversely related to the mass and gravitational acceleration of an object. Despite the fact that the terms weight and mass are frequently used interchangeably in ordinary conversation, it is crucial to understand the difference between the two. Weight is a measurement of the force of gravity acting on an object, whereas mass was an indication of the quantity of matter that makes up that object.

A physical quantity called force defines the interaction of two systems or objects. It has both size (size) and direction because it is a form of vector quantity.

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Decomposition reaction represents the breakdown of single compound into more products.

A decomposition reaction is a type of reaction in which one reactant breaks down into two or more products. This can be represented by the general equation: H2O2 →  2H + 2O. In this example the breakdown of hydrogen peroxide occurs and  water and oxygen are formed.

Zinc reacts with dilute sulphuric acid to form zinc sulphate and hydrogen This hydrogen goes up into the atmosphere whereas the zinc sulphate remains.

Magnesium ribbon should be cleaned before burning in air because Magnesium metal combines with oxygen to form Magnesium Oxide (MgO) layer, which is a very stable molecule.

Arteries have thick, elastic walls, while veins have thin walls because arteries are under more pressure, as compared to veins that are under less pressure. Arteries are big in size whereas veins are small.

The role of valves in the heart is that these valves prevent the backward flow of blood.

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The false statement about the neuromuscular junction acetylcholine (ACh) receptor is c. The opening of the ACh receptor is all-or-none.

The degree to which the ACh receptor opens is dependent on both the amount of neuromuscular junction acetylcholine (ACh) present and the level of receptor activation; it is not an all-or-nothing response. The channel opens when ACh binds to the receptor, causing a conformational shift that permits ion flow.

The following claims are accurate:

ACh concentration affects whether an ACh channel will open, with a larger ACh concentration increasing the likelihood that the channel will open and ion flow.

The net ionic currents through all activated ACh receptors add up to make up the synaptic current, which is defined as the sum of all such currents.

Membrane voltage impacts the likelihood that an ACh channel will open: Membrane voltage has an impact on the likelihood that an ACh channel will open. In general, hyperpolarization lowers and depolarization enhances the likelihood of a channel opening.

The patch clamp method allows for the measurement of the current flowing through a single receptor, including ACh receptors. This method sheds light on the characteristics and functions of individual ion channels, including ACh receptors.

As a result, c is the erroneous assertion. All or none of the ACh receptor's opening occurs.

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The rate of consumption of I- in the first 15.0 seconds of the reaction is 0.227 M/s.

The given balanced chemical equation is:

H2O2(aq) + 3I-(aq) + 2H+(aq) → I3-(aq) + 2H2O(l)

From the stoichiometry of the balanced equation, we can see that the ratio between I- and H2O2 is 3:1. This means that for every 1 mole of H2O2 reacted, 3 moles of I- are consumed.

In the given time interval of 15.0 seconds, the concentration of I- decreases from 1.000 M to 0.773 M. The change in concentration is:

Δ[I-] = [I-]final - [I-]initial = 0.773 M - 1.000 M = -0.227 M

To find the rate of consumption of I-, we divide the change in concentration by the time interval:

Rate = Δ[I-] / Δt = -0.227 M / 15.0 s = -0.0151 M/s

The negative sign indicates the decrease in concentration of I-. However, since rate values are usually reported as positive values, we take the absolute value:

Rate = 0.0151 M/s

Therefore, the rate of consumption of I- in the first 15.0 seconds of the reaction is 0.0151 M/s or approximately 0.227 M/s.

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Answer:

1.12x10-10 or 0.63 ewan

Explanation:

Correct option is C)

The distance of centre of mass from carbon atom is,

xcm=m1+m2m1x1+m2x2

=12+1612×0+16×1.1

=0.63A˚

Thus, the centre of mass is 0.63A˚ from carbon atom.

The distance between a carbon atom and an oxygen atom in the co molecule is 0.63

Distance is the measurement of the farness of two objects from each other.

The distance between the molecules can be calculated by the given formula

\(xcm = m_1+m_2m_1\times 1+m_2 \times 2\)

Putting the values in the equation

\(xcm = 12+1612 \times 0+16 \times 1.1 = 0.63 A^\circ\)

Thus, the distance between a carbon atom and an oxygen atom in the co molecule is 0.63

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where it was formed and. conditions it was formed under

Answer:

It would sink because the density of the ball, 0.802 g/cm3, is greater than the density of gasoline.

On comparing the densities of both ball and gasoline, the density of the plastic ball is larger than that of petrol, it would sink in a container of petrol.

Mass is a physical property of matter that measures the amount of substance in an object. It is typically measured in grams (g) or kilograms (kg).

The density of the plastic ball can be calculated using the formula:

Density = Mass / Volume

Density of the plastic ball = 15.8 g / 19.7 \(\rm cm^3\) = 0.801 g/ \(\rm cm^3\)

The density of gasoline is about 0.7 g/ \(\rm cm^3\)

Since, the density of the plastic ball is greater than the density of gasoline, the plastic ball would sink in a container of gasoline.

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Answer: electricity energy

Explanation:

Answer:

electricity

Explanation: took the test

The reagents which are used to carry out the chlorination of benzene are   cl2/fecl3 and cl2/nacl

Chlorination is the process of disinfecting drinking water by introducing chlorine to eradicate viruses, germs, and parasites. To get drinking water with safe levels of chlorine, various techniques can be utilized. Chlorination is the technique of disinfecting and eradicating bacteria from drinking water by adding chlorine to it.

To get drinking water with safe levels of chlorine, various techniques can be utilized. Chlorine can be found as solid calcium hypochlorite (Ca(OCl)2), sodium hypochlorite solution (NaOCl), or compressed elemental gas. Chlorine is added to water as part of the chlorination process, however the chlorinating substance need not be pure chlorine.

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Answer:

18 electrons

Explanation:

Answer:

18 electrons

Explanation:

Ca has 20 electrons. Ca^2+ has 18 electrons

Answer:

Para ser mas exactos una reaccion quimica es donde los reactivos se transforman en productos.

Explanation:

Durante las reacciones quimicas, ocurren ciertas transformaciones que hace que se tome o se libere energia del medio, generando que los reactivos de la reaccion, es decir los compuestos iniciales, en un determinado espacio y tiempo bajo ciertas condiciones de presion y temperatura exactas se transformen en productos.

Para la quimica, la misma cantidad de materia que se encuentra en los reactivos se mantendra en los productos, es por eso que cada reaccion quimica debe respetar las reglas de la estequiometria y estar balanceadas a la perfeccion.

Answer:

1. Isotopes are atoms of an element that consist of the same number of protons but a different number of neutrons.

2. No. of protons = 13

 No. of neutrons = 27 - 13

                            = 14

3. refer to attached file

4(a). Since the noble gases can be found in group 18 of the periodic table, it suggests that they have a complete octet (a full valence shell of electrons), and this allows them to be stable gases that show the least reactivity.

4(b). Since the number of protons and electrons are equal in an atom, the opposite charges are balanced and thus, there is no net charge on the atom (neutrons present in the atom have no charge). Hence, an atom is electrically neutral.

5. Mass no. of X = 6 + 6

                           = 12

   Mass no. of Y = 6 + 8

                           = 14

6. mass number = no. of protons in the nucleus of an atom + no. of neutrons in the nucleus of an atom

atomic number = no. of protons in the nucleus of an atom

isobars = atoms of elements which have the same mass number but different atomic numbers

isotopes = atoms of elements which have the same number of protons but a different number of neutrons