How many moles of NH3 is required to react with 32.2 grams of O2?

Answer:

A. it gives up electrons

Explanation:

In a redox reaction, the reducing agent is the element or compound that undergoes oxidation and gives up electrons. The oxidizing agent is the element or compound that undergoes reduction and gains electrons.

Hope that helps.

Copper atoms (Cu) were created by reducing copper ions (Cu2+). An illustration of a reduction reaction is this. (Mg2+).To create Mg2+ ions, Mg atoms lost their electrons. An example of an oxidation reaction is this.

Oxidation and reduction occurred in test tube 5. Here is the equation for the reaction that took place:MgSO4 (aq) + Cu (s) CuSO4 (aq) + MgCuSO4's blue hue was neutralised to a solid copper hue. Copper atoms (Cu) were created by reducing copper ions (Cu2+). An illustration of a reduction reaction is this. Cu atoms are created when Cu2+ gains electrons. Due to the presence of magnesium ions (Mg2+), the solution was greenish-yellow.To create Mg2+ ions, Mg atoms lost their electrons. An example of an oxidation reaction is this. Two electrons were lost by the magnesium atom, leaving two electrons behind.

As a result, test tube 5 experienced both oxidation and reduction.It is possible to prove that oxidation, reduction, or both took place through the reaction's electron transfer and colour changes. A reduction reaction was seen when copper ions transformed into copper atoms. An oxidation reaction was evident when magnesium atoms transformed into magnesium ions.

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Answer:

80.% carbon and 20.% hydrogen

Explanation:

Ethane has molecular formula C2H6. So What is the composition of carbon and hydrogen in ethane. its alot to explain but yea thats wht i got

The activated complex in the following reaction is: FeCuSO4. The activated complex is a transition state that is an intermediate structure in a chemical reaction. Option C)

An activated complex is a structure that exists temporarily during a chemical reaction and corresponds to the top of the energy barrier that must be overcome for the reaction to proceed to completion.

The activated complex in the following reaction is: FeCuSO4. The activated complex is a transition state that is an intermediate structure in a chemical reaction. It is the structure with the greatest energy within the reaction process and is used to determine the rate at which the reaction occurs. An activated complex exists when the energy required to break the old bonds and form new ones has been absorbed. It has a specific configuration and energy content that is precisely defined.

A chemical reaction is the process by which atoms or groups of atoms in molecules interact to form new molecules. A chemical reaction is caused by the motion of electrons, which are negatively charged particles that surround atomic nuclei. The reaction proceeds through the formation of an intermediate species known as the transition state or activated complex. Reaction mechanisms are the sequence of steps involved in a chemical reaction. These steps describe the intermediate species formed as the reactants are converted to products. Hence option C) is correct.

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Answer:

Oppositely charged ions attract.

Explanation:

In an ionic bond oppositely charged ions attracts one another by electrostatic attraction.

Answer:

The trade was difficult with the old system.

Explanation:

The existing system for the measurement of goods did not work well in the trade because there are different system used by the people of different cities so metric system was used in the whole country in place of the old system of measurement during the French Revolution in order to make the trade easier and quick across the country. This metric system is extensively used in the trade as compared to the old system of measurement due to its easiness and fast.

The following which would not be an application of Stuart Wilkinson's theory as regards marrying the idea of useful robotic capabilities in terms of eating food is a recycling truck that feeds on petroleum and is denoted as option D.

This is referred to as a machine which is able to replicate certain human movements and functions automatically through the use of an external control device.

Since Stuart Wilkinson's theory intends to marry the idea of useful robotic capabilities in terms of eating food then a recycling truck that feeds on petroleum isn't accurate because petroleum isn't a source of food.

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Answer:

See below

Explanation:

.75 = 1/2^(40/h)      

log .75 / ( log 1/2) = 40 / h

h = half life =   96.37683 min

To solve this type of question we must know the concept of rate law. The half-life of a compound is 23 years for 75% of a given sample of the compound decomposes in 40 minutes.

There are two kinds of rate law in chemical kinetics one is differential rate law and other is integrated rate law

The rate law for first order kinetics is

\(k=\frac{2.303}{t}log\frac{a}{a-x}\)

Where

k - rate constant

t - time passed by the sample

a - initial amount of the reactant

a-x - amount left after the decay process

The expression for the half-life of the compound is

\(t_{1/2} = \frac{0.693}{K}\)

Where k is the rate constant

t = 40 minutes

a = 100 g

a-x = 100 g - 75g = 25 g

(Since it is given that 75% of the given compound decomposes)

Then,

\(k=\frac{2.303}{40}log\frac{100}{25}\)

=0.03years⁻¹

\(t_{1/2} = \frac{0.693}{0.03}\)

=23 years

Therefore, the half-life of the given compound is 23years.

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The option that correctly describes a covalent species that has four electron groups around the central atom are:

It should be noted that when a molecule have four electron groups and it is been found around the central atom and this will orients the four groups in the direction of a tetrahedron.

However when there are  four atoms attached to these electron groups, in Tetrahedral Geometry, molecular shape  will also be also tetrahedral.

Instance of this is Methane (CH 4), in conclusion, in the case whereby all four electron pairs are bonding pairs, then it can be concluded that the  shape of the system is tetrahedral.

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missing options:

The ideal bond angle for a four-electron system is 109.5°.

If all four electron pairs are bonding pairs, the shape of the system is tetrahedral.

The eletron are not bonding in the system.

A bent shape is observed if there are two bonding pairs and two lone pairs.

Answer: Yes!

To be considered a measurement, you need the number AND the unit. Without the unit, the measurement is just a number, and without the number, the measurement is just a word :)

Answer:

name four agricultural inputs are subsidized by the government

0.297 kJ of heat is needed to raise the temperature of 10g of aluminum from 22 degrees Celsius to 55 degrees Celsius.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

It is given by the formula -

                                                  Q = mcΔT

where, Q = amount of heat

m = mass

c = specific heat

ΔT = Change in temperature

Given,

mass = 10g

c = 0.901J/g⁰C

Initial temperature (T₁) = 22⁰C

Final Temperature (T₂) = 55⁰C

Q = mcΔT

= 10 × 0.901 × (55 -22)

= 297.33 J = 0.297 kJ

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The two statements that are true about the reaction are:

A catalyst is described as  a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.

If we happen to increase the temperature, it provides more kinetic energy to the reactant molecules and this makes it  more likely to overcome the activation energy barrier and engage in the reaction.

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Two examples of potential energy are gravitational potential energy and elastic potential energy.

Gravitational potential energy is the energy stored in an object due to its position in a gravitational field. For example, a book placed on a shelf has gravitational potential energy because it has the potential to fall to the ground due to the force of gravity.

Elastic potential energy is the energy stored in an object when it is deformed, such as when a spring is compressed or stretched. For example, a compressed spring has elastic potential energy because it has the potential to return to its original shape and release the stored energy when it is released.

Other examples of potential energy include chemical potential energy, which is the energy stored in the bonds between atoms in a molecule, and nuclear potential energy, which is the energy stored in the nucleus of an atom.

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The formula of manganese (IV) oxide is MNO2

The formula for manganese (IV) oxide is \(MnO_4\). Therefore, the correct option is A.

A manganese atom is bonded to four oxygen atoms to produce an inorganic compound known as manganese(IV) oxide with the chemical formula \(MnO_4\). It is often referred to as manganese dioxide. The +4 oxidation state of a manganese compound is indicated by the Roman numeral "IV" in the name.

Pyrolusite, a naturally occurring mineral, is a dark brown or black solid consisting of manganese(IV) oxide. Due to its favorable properties, it is often employed in a wide variety of applications. It acts as a catalyst, especially when breaking down hydrogen peroxide. Additionally, it is used to make batteries, ceramics, glass and pigments.

Therefore, the correct option is A.

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2. The pH is 4.22 × 10⁸. 3. pH is 7, 4. pOH is 9.7, 5. diprotic is explained below, 6. Amphoteric is explained below, 7. pH meter, 8. A buffer solution is explained below, 9. Titration is explained below, 10. Difference between strong and weak acids is explained below.

2. pH = -log[H⁺]

pH = -log(4.22 x 10⁻⁸)

pH ≈ 7.375

3. pH + pOH = 14

pH + 7 = 14

pH = 14 - 7

pH = 7

4. pH + pOH = 14

pOH = 14 - pH

pOH = 14 - 4.3

pOH ≈ 9.7

Now,

[H⁺] × [OH⁻] = 1.0 x 10⁻¹⁴

[OH⁻] = 1.0 x 10⁻¹⁴ / [H⁺]

[OH⁻] = 1.0 x 10¹⁴ / 10^(-pOH)

[OH⁻] = 1.0 x 10⁻¹⁴ / 10^(-9.7)

[OH⁻] ≈ 1.99 x 10⁻⁶ M

5. Being diprotic means that a molecule or ion can donate or release two protons (H⁺ ions) in an acid-base reaction.

6. Amphoteric refers to a substance that can act as both an acid and a base.

7. The pH can be measured using a pH meter or a pH indicator.

8. A buffer solution is a solution that can resist changes in pH when small amounts of acid or base are added to it.

9. Titration is a laboratory technique used to determine the concentration of a solution by reacting it with a solution of known concentration (titrant) of another substance.

10. A strong acid is an acid that completely ionizes in water, releasing all of its hydrogen ions. A weak acid is an acid that does not completely dissociate into ions when dissolved in water.

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Answer:

B

Explanation:

Answer:

this shows that the plates are very active in that region. The plate collide a lot.

Explanation:

Answer:

Explanation:

The molar volume of a gas at STP (Standard Temperature and Pressure), which is equal to 22.4 liters.

There are 6.02x10^23 molecules in 1 mole of Argon.

So for 1.51x10^24 molecules of Argon, the volume at STP should be

(1.51x10^24 / (6.02x10^23)) * 22.4

= 56.19 liters

Moles of Argon:-

Now

\(\\ \rm\Rrightarrow 2.5(22.4)=56L\)

Answer:

Glucose. Fructose. Galactose.

Explanation:

Glucose +fructose=succrose(normal sugar)

Glucose+Glucose= Maltose(wheat sugar)

Glucose+Galactose= Lactose(milk sugar)

Answer:

Explanation:

Carbon and water = carbon dioxide and hydrogen

Your speed could change in several ways as you jog along a park's path. Option 2.

One possible way is that you could speed up if you increase your pace or start running instead of jogging. This could happen if you feel more energized, motivated, or if you need to catch up with someone.

Conversely, your speed could slow down if you get tired, experience muscle fatigue, or encounter an uphill section of the path that requires more effort. Other factors such as weather conditions, terrain, or distractions can also affect your speed.

Therefore, the correct answer would be "all of these, except none of these," as there are various factors that can cause changes in your jogging speed along a park's path.

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Answer:

Explanation:

Here, we want to know the number of moles of water molecules present in the hydrate

Firstly, we need to get the percentage by mass of water

To get this, we have to divide the percentage lost to heating by the total mass and convert to a percentage

Mathematically, we have that as:

What this means is that the percentage by the molar mass of water is still 16.276%

To get the number of moles of water, let us call it n

The molar mass of water divided by the total mass of the hydrate as a percentage is equal to 16.276%

Thus, we have it that;

The molar mass of n moles of water is (18 * n = 18n g/mol : 1 mole of water has a mass of 18g)

For the anhydrous part, the molar mass is 278 g/mol

Thus, we have the percentage as:

From the above, we can get the value of n

Thus, we have that as:

The number of hydrate molecule is 3

To solve the dilution problem, we can use the formula:

C₁V₁ = C₂V₂

Where:

C₁ is the initial concentration,

V₁ is the initial volume,

C₂ is the final concentration, and

V₂ is the final volume.

Given:

C₁ = 12 M (concentration of the concentrated HCl),

V₂ = 500 mL (final desired volume),

C₂ = 2.0 M (final desired concentration).

Let's solve for V₁:

C₁V₁ = C₂V₂

(12 M)(V₁) = (2.0 M)(500 mL)

Cross multiplying:

12V₁ = 2.0 × 500

12V₁ = 1000

V₁ = 1000 / 12

V₁ ≈ 83.33 mL

Therefore, the chemist should measure out approximately 83.33 mL of concentrated 12 M HCl to produce 500 mL of 2.0 M HCl.\(\)

The temperature should be between 30 °F and 60 °F because the temperature outside is 39 °F, so the water in the pond should have a temperature range that includes this temperature.

Therefore, the answer is B.

Answer:

The solubility of alkaline earth metal hydroxides in water increases down the group because the size of the metal cation increases as you move down the group. This increase in size results in a decrease in the cation's charge density, which makes it less able to attract and hold onto hydroxide ions. As a result, the hydroxides become more soluble in water as you move down the group. Additionally, the lattice energies of the hydroxides decrease down the group, making it easier to break apart the crystal lattice structure and dissolve the hydroxides in water.

Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.