Which two formulas contain 4 atoms of hydrogen

When the hydrogen ions (H⁺) from the acid react with the hydroxide ions (OH⁻) from the base. The acid and base neutralize each other. The other ions from both dissolve. When the extra ions dissolved in water from its making evaporate and the ions join to form the compound know as salt.

An acid which causes the formation of a polyatomic ion undergoes dissociation to form hydrogen ions and anions.

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste.  HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

Learn more about acids,here:

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In accordance with Le Chatelier's principle, the removal of a product will shift the equilibrium to the right, the removal of a reactant will shift the equilibrium to the left and adding a catalyst will have no effect on the equilibrium position.

The principle being highlighted in this question is known as 'Le Chatelier's Principle', which states that if a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium will shift to counteract the change.

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Removing ammonia shifts the reaction to the right, removing hydrogen gas shifts it to the left, and adding a catalyst has no effect on the equilibrium position.

In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g):

Removing ammonia: This action reduces the concentration of the product (NH3), causing the reaction to shift to the right (toward products) to replace the removed NH3. Thus, removing ammonia results in a shift to the right.

Removing hydrogen gas: This action decreases the concentration of one of the reactants (H2), causing the reaction to shift to the left (toward reactants) to replenish the lost H2. Thus, removing hydrogen gas results in a shift to the left.

Adding a catalyst: A catalyst speeds up the rate of both the forward and reverse reactions equally and does not affect the position of the equilibrium. Thus, adding a catalyst results in no effect on equilibrium position.

To balance the given equation, we apply elemental balance and count each elements per side. There are 2 nitrogens in the left side so there should be 2 moles of NO2. Since there are already 4 moles of O in the right side, there should be 2 moles of O2. Hence answer is a. Place the coefficient 2 in front of oxygen and nitrogen dioxide.

Answer:

A. Place the coefficient 2 in front of oxygen and nitrogen dioxide.

Explanation:

Balancing equations is a consequence of the law

of conservation of mass, according to this law, the mass of the reactants must be equal to the mass of the products, this means that the quantity of the atoms found in the reactants must be equal to the quantity of the products In this case, for the equation to be balanced, a coefficient of 2 must be added to oxygen and nitrogen dioxide.

Change the core from wood to iron. This is because iron is a magnetic material while wood is not magnetic hence cant acquire magnetism. Other factors that would increase the strength of electromagnet would be; increasing the amount of electric current, and increasing the number of winding's.

HM, I think the answer would be D. This is just a guess, so please use it if ou want to answer D it's ok :D

Answer: d. all of the above

Explanation:

Private land is the land which is legally occupied by a single ownership. The government has no right over it. The single owner can use the land for the purpose of self benefit. A private land owner can use the land for the purpose of construction of homes, factories and use the land for the commercial businesses like fishing, farming and for other needs.

On the basis of the above explanation, d. all of the above is the correct option.

A)Carbon tetrahydride

Answer:

Carbon tetrahydride is the answer

Explanation:

In an ideal gas law, n represents number of gas molecules in given amount of gas at constant pressure with constant temperature.

Final answer:

In the ideal gas law, the variable 'n' represents the number of moles of a gas, which is essential in calculating the state of an ideal gas along with pressure, volume, and temperature.

Explanation:

In the ideal gas law, represented by the equation PV = nRT, the variable n stands for the number of moles of a gas. The ideal gas law restates the various individual gas laws into a single unified equation, which allows for the calculation of the state of an ideal gas when the pressure (P), volume (V), temperature (T), and number of moles (n) are known. The universal gas constant (R) relates these quantities and is a product of Avogadro's number (NA) and the Boltzmann constant (k).

= 9.45 × 10^23 molecules

The molar mass of Na2SO4 = 142.04 g/mol

Number of moles = mass/molar mass

                             = 223/142.04

                             =  1.57 moles

But;

1 mole = 6.02 × 10^23 molecules

Therefore;

1.57 moles = ?

= 1.57 × 6.02 × 10^23 molecules

= 9.45 × 10^23 molecules

The potential future effects of global climate change include more frequent wildfires, longer periods of drought in some regions and an increase in the number, duration and intensity of tropical storms.

Climate change has long been a myth of the left to trick you into following there crazy policies, "climate change" has been happening for 30,000 years. The great lakes used to be glaciers, now there lakes. Climate change is not man made. O2 has been in the atmosphere for thousands of years aswell, not only that, but we need O2 for plants. To answer your question, you should stand up to your teacher and give them the facts.

The boiling point of HF is 67.1°F and H2 is -423.2°F so HF is HIGHER than H2 and N2 boiling point is -320.4°F so HF is again HIGHER than N2.

Answer:

Boiling point of HF is greater than both H₂ and N₂.

Explanation:

Boiling point is the temperature at which the vapour pressure of a liquid becomes equal to atmospheric pressure.

Higher the intermolecular force of attractions between molecules of liquid, higher the boiling point.

Hydrogen molecule and nitrogen molecules are non polar covalent molecules. They have weak london dispersion forces in between them.

However in HF there is intermolecular hydrogen bond, which makes the HF molecule to have higher boiling point than both of them.

a is Cation

b is delocalised electrons

This diagram is a representation of physical property in metal called Malleable

c is the electrostatic force

V is the answer for this question

A pure substance is a form of matter with constant composition and properties. Examples include elements and compounds, each with fixed physical and chemical properties and cannot be separated by physical methods.

Without the context of visual imagery in the question, it is difficult to provide a precise answer to which image(s) represent pure substances. However, I can explain what a pure substance is. A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Examples of pure substances include elements like iron or copper, and compounds like water or sodium chloride. Pure substances have fixed physical and chemical properties like boiling point, melting point, and density. The special characteristic of pure substances in Chemistry is that they cannot be separated into other kinds of matter by physical methods.

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Rhizobium: are nitrogen-fixing bacteria that live in the nodules of legumes which convert nitrogen in soil into nitrogen compounds. so the answer is all the above i hope this helps

Answer:

All of the above

Explanation:

Rhizobium is an important diazotrophic bacteria in nitrogen cycle. They are involved in a symbiotic relationship with leguminous plants; they assist in nitrogen fixation in the roots of these plant by taking up nitrogen from the atmosphere and passing it into the plants (in the form of ammonia or amino acids) which allows the plant to grow in soil with low nitrogen. The plant in exchange provide organic acids for the bacteria which it uses for carbon and energy source.

From the above, we can deduce that

(a) rhizobium are nitrogen fixing bacteria

(b) they live in the nodules of legumes (hence the symbiotic relationship)

(c) convert nitrogen in soil into nitrogen compounds like ammonia or amino acids

hence, the correct option is all of the above

The answer is A. are tools that make work easier

The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass number of 35 amu. To calculate the average atomic mass, multiply the fraction by the mass number for each isotope, then add them together.

To calculate the average atomic mass of an element from percent abundances, convert the abundances to decimals, multiply each decimal by the atomic mass of the corresponding isotope, and sum the products.

The average atomic mass of an element can be calculated using the percent abundances of its isotopes. To do this, convert the percent abundances into decimal form by dividing by 100. Then, multiply each decimal abundance by the respective isotope's atomic mass. Finally, add the products together to get the average atomic mass of the element.

Your answer will be B because sodium and chlorine and both elements and two elements combine to make a compound

Answer : The correct option is, (B) element; element; compound

Explanation :

Mixture : It is defined as the substance that is made by the combination of two or more different components.

Pure substance : It is defined as a substance that is made by the combination of only one type of atom or only one type of molecule.

Compound : It is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.

Element : It is a pure substance which is composed of atoms of similar elements.

As per question, the sodium is the element that combines with the chlorine element to form sodium chloride as a compound.

Hence, the correct option is, (B) element; element; compound

I think this is the answer but he did the oil drop experiment, i hope this helps

Answer:

he used voltage adjustments to make charged oil drops float.

Explanation:

just did it on apex

That would be vegetables rotting and boiling an egg. . The others are physical changes.

Answer:

Reaction Rate

Explanation:

It means change in concentration of reactants or change in concentration of products per unit time.

Answer:

Reaction rate refers to the speed at which reactants are converted into products.

Explanation:

The complete question is:

"Which term refers to the speed at which reactants are converted into products?

A) reaction rate

B) activation energy

C) meta stable state

D) spontaneous reaction"

In a chemical process, substances called reactants are transformed into products as time passes. The reaction rate is defined as the change in the concentration of one of the reagents or products, in a time interval in which the change takes place. In other words, the speed of a chemical reaction is the speed with which products are formed (or with which reagents disappear).

Chemical kinetics is the area within physical chemistry that is responsible for studying the speed of a reaction, the factors that affect the speed of the reaction, and the mechanism that follows the reaction.

Reaction rate refers to the speed at which reactants are converted into products.

Concentration Definition. In chemistry, concentration refers to the amount of a substance per defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution. Concentration usually is expressed in terms of mass per unit volume.

The unit for measuring length should be chosen based on the size of the object. Small objects are suited to millimeters or centimeters, while large objects may require meters or kilometers. Units like inches, feet, centimeters, or meters are best for everyday objects.

The best unit for measuring the length of an object depends largely on the size of that object. For very small objects, units like millimeters or centimeters are often most suitable. For larger objects, meters or kilometers might be ideal. For objects of a size common to everyday experiences, like the length of a book or the height of a desk, inches or feet (in countries where the imperial system is used), or centimeters or meters (in countries where the metric system is used), may be the best choices. The choice of units should make the measurement easy to understand and compare with similar objects.

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The answer is

A. water

A. Water

hope this helps

The reaction will shift to the right (toward the products)

Answer:

The reaction will shift to the right (toward the products)

Explanation:

A gas in a liquid

Final answer:

A decrease in pressure has the greatest effect on solutions containing gases, as it causes a decrease in gas solubility, leading to the escape of gas from the solution, such as carbon dioxide bubbling from an opened soda can.

Explanation:

A decrease in pressure has the greatest effect on a solution that contains gases. This is because gases are highly responsive to changes in pressure, as described by gas laws. An increase in pressure leads to a decrease in gas volume, hence an increase in gas concentration in solution. When pressure is decreased, the reverse happens, and gas solubility decreases.

Consider opening a soda can; as the pressure above the liquid decreases, the carbon dioxide escapes due to the reduced solubility, causing bubbling. Therefore, solutions with dissolved gases, much like carbonated beverages, are the most affected by changes in pressure. This phenomenon is crucial in understanding the behavior of gas-liquid systems.

= 607.568 Torr

1 in of mercury is equivalent to 25.4 Torr

Therefore;

23.92 InHg will be equal to;

23.92 × 25.4

= 607.568 Torr

Gravitational potential energy is due to the position of an object above Earth's surface. The object has the potential to fall due to gravity. Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height

Gravitational potential energy is the energy an object possesses due to its position above the ground, calculated with the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is the height.

The type of potential energy that depends on height is called gravitational potential energy. When an object is raised against the pull of gravity, work is performed, resulting in an increase in potential energy. This energy is calculated using the formula PE = mgh, where m is the mass, g is the acceleration due to gravity, and h is the height the object is raised. For example, if you lift a car to the top of a parking garage, you are increasing its gravitational potential energy regardless of how the car is moved there.

Considering an object's potential energy available when a body of water is trapped behind a dam, it can be computed similarly. The gravitational potential energy is half the product of the mass, acceleration due to gravity, and the average height (mgh/2), since the height of the water smoothly transitions from h to zero as it drains out. Volume is the product of the area A of the captured water surface and the initial water height h, and the mass is the product of the density p and the volume.

In essence, objects have potential energy due to their position relative to other objects with mass, and the gravitational force provides a way to release this energy, as seen when an object is allowed to fall back to the ground, converting potential energy to kinetic energy.

I’m not sure exactly what question you’re trying to ask, but I’ll give two answers:

1. The mass is reported as 35.5 amu because atomic weights are reported based on the weights and abundances of the isotopes of that element. For example, Hydrogen (which is typically understood to have only one proton, aka 1 amu) has a weight of 1.004 amu. This is because heavier isotopes of this element do exist but in very small quantities; however, they can still influence the “averaged” weight.

2. The weight of an atom is intrinsic based on its makeup - the number of each component influence the overall weight of the atom. In this case, Chlorine is comprised of the right number of protons and neutrons in the right occurrence and organization such that a weight of 35.5 amu is reported.

Hope this helps!

The solution is included. If you wonder, n(x) means the number of moles of the substance x.

When 3.18 mole of chlorine reacts with excess aluminum, 2.12 mole of aluminum chloride are formed.

The question pertains to the stoichiometry of the reaction between aluminum (Al) and chlorine (Cl₂) to form aluminum chloride (AlCl₃). According to the balanced chemical equation, 2 Al (s) + 3 Cl₂ (g) → 2 AlCl₃ (s), it indicates that 3 moles of chlorine gas react with 2 moles of aluminum to produce 2 moles of aluminum chloride. Given that 3.18 moles of chlorine reacts with excess aluminum, it means we have more than enough aluminum to react with the provided chlorine. Therefore, leveraging the stoichiometric relationship from the balanced equation where 3 moles of Cl₂ yield 2 moles of AlCl₃, if we have 3.18 moles of Cl₂, we can calculate the moles of AlCl3 produced as follows: (2 moles AlCl₃ / 3 moles Cl₂) * 3.18 moles Cl₂ = 2.12 moles of AlCl₃.

D. density of the gas

Answer: C. temperature of the gas

Explanation:

The kinetic theory says that the kinetic energy of the gas molecules (directly related to "how much" the molecules are moving inside the gas) is directly related to the internal energy of the gas, which is related to the temperature.

This relation can be written, in the kinetic theory, as:

(1/2)m*v^2 = (1/2)*Kb*T

where Kb is a constant, and the therm in the left is the kinetic energy, so here we can see that the kinetic energy is proportional to the temperature, where (1/2)*Kb is the constant of proportionality