If you add weight to an object, it will ________ to move it.

Answer:

Al₂O₃

Explanation:

When writing the correct compound, you need to take the charges of both ions into account.

Aluminum (Al) has an ionic charge of +3.

Oxygen (O) has an ionic charge of -2.

The ionic compound should have an overall charge of 0 (neutral). Evidently, the charges of the ions don't balance out if you were to form a compound with just one aluminum and one oxygen (making an overall charge of +3 - 2 = +1).

To fix this, make the charge of each ion the subscript of the other element.

This makes the compound:

Al₂O₃

Now, the aluminum is contributing +6 (2 x +3 = +6) and oxygen is contributing -6 (3 x -2 = -6). This balanced the compound and results in an ionic compound with no overall charge.

when ionic salts are dissolved in water, then the temperature of the resulting solution increases.

Amount of the temperature increases depending on the amount of salt dissolved in the water.

Ionic salts and different ionic compounds like will dissolve quicker the hotter the water it's far dissolved in. this is due to the fact hot temperatures make atoms pass quicker and the quicker they circulate, the easier they come apart.

The procedure of dissolving is endothermic whilst much less strength is launched when water molecules “bond” to the solute than is used to tug the solute apart. because less power is released than is used, the molecules of the answer flow more slowly, making the temperature lower.

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Answer:

Chlorine and Bromine are in the same group

Answer:

I think fluorine and neon

Answer:

identify the atoms on each side

count the atoms on its side

use coefficients to increase the atoms on each side

check to make sure you have the same number of each type of atom on each side

Answer:

3,4,2,1

Explanation:

So, sodium and chloride make up 39.3% and 60.7%, respectively, of NaCl.

Example:

What is the % composition of a compound with a total mass of 34.37 g, of which 21.43 g is phosphorous and 12.94 g is magnesium?

Mass percent of magnesium equals 12.94g/34.37g, or 37.6%

21.43g/34.37g or 62.4% of the mass is made up of P.

Magnesium and phosphorous make up 37.6% and 62.4%, respectively, of this compound's percent composition.

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The plastic container is likely to impact the integrity of the evidence i.e. a sample of DNA based on this storage method.

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In recent years, the output of ammonia has remained mostly steady. Ammonia output was projected to reach 150 million metric tonnes worldwide in 2022. With over 64.6 million metric tonnes produced, East Asia has the largest ammonia output.

Sodium metal is produced via the Castner method, which involves electrolyzing molten sodium hydroxide at a temperature of around 330 °C. At that temperature, the molten sodium would begin to dissolve in the melt; below that temperature, the liquid would harden.

One mole (or one gramme) of sodium chloride (NaCl) has a molecular weight of 58.44, making 58.44g the molecular weight of one gramme. You may create 1M NaCl by dissolving 58.44g of sodium chloride in a final amount of 1 litre.

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The correct option is (d) Carbon Dioxide.

Explanation:

The density of air is around 1.2 g/L, which means that any gas with a density above this value is more dense than air.

Carbon dioxide has a density of approximately 1.98 g/L, which is considerably more dense than air (composed of nitrogen and oxygen).

As a result, if a gas sample is determined to be more dense than air, it is likely to be carbon dioxide (CO2), which has a molecular weight of 44 g/mol.

Carbon dioxide is produced in the laboratory by many chemical reactions and is commonly employed in the food and beverage industries, such as carbonating soda and beer.

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Answer:

Toxic pollution

Explanation:

Gasoline is a harmful chemical

Answer: A. troposphere :)

hope this helps

Explanation:

<3

Sodium (Na) and chlorine (Cl) are the largest dissolved components in ocean water due to the abundance of sodium and chloride ions in the Earth's crust and the continuous input of these elements into the oceans through various processes. Sodium is one of the most common elements in the Earth's crust, and chlorine is widely distributed in rocks, minerals, and salts.

Over millions of years, weathering of rocks, volcanic activity, and erosion release these elements into rivers and ultimately into the oceans. The combination of sodium and chlorine ions results in the formation of sodium chloride, which is commonly known as table salt and contributes to the salinity of seawater.

The most abundant dissolved gas in ocean water is carbon dioxide (CO2). Carbon dioxide dissolves in the surface waters of the ocean through gas exchange with the atmosphere. It plays a crucial role in regulating the pH of seawater and is an essential component of the carbon cycle. Carbon dioxide is involved in various biological and chemical processes in the ocean, including photosynthesis by marine plants and the formation of calcium carbonate shells by marine organisms. Additionally, the increase in atmospheric carbon dioxide due to human activities has led to ocean acidification, which is a significant concern for marine ecosystems.

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Due to the fact that they combine to form the ionic compound sodium chloride (NaCl), also known as salt, sodium (Na) and chlorine (Cl) are the two most abundant dissolved elements in ocean water.

Thus, Salts are among the many dissolved compounds that water from rivers and streams transports into the ocean.

In particular, sodium and chloride ions have accumulated in the ocean throughout time, leading to the high concentration of these elements in seawater. Magnesium, calcium, potassium, and sulphate ions are among the other dissolved substances in ocean water.

Oxygen  is the dissolved gas that is most prevalent in ocean water.

Thus, Due to the fact that they combine to form the ionic compound sodium chloride (NaCl), also known as salt, sodium (Na) and chlorine (Cl) are the two most abundant dissolved elements in ocean water.

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Answer:

(1) Acid -------------------------------------> (G) When dissolved in water, its solution has a pH value less than 7. Acids are proton (H⁺ ion) donors.

(2) Alkali -----------------------------------> (E) The oxide, hydroxide, or carbonate of a metal that will react with an acid, forming a salt as one of the products (if a base dissolves in water it is called an alkali. Bases are proton (H⁺ ion) acceptors.

(3) Base ------------------------------------> (I) Its solution has a pH value of more than 7.

(4) Blast furnace ------------------------> (C) The huge reaction vessels used in industry to extract iron from its ore.

(5) Displacement reaction ----------> (R) A reaction in which a more reactive element takes the place of a less reactive element in one of its compounds or in solution.

(6) Mole -----------------------------------> (A) A very large number that is the amount of substance in the relative atomic or formula mass of a substance.

(7) Neutral -------------------------------> (J) A solution with a pH value of 7 which is neither acidic nor alkaline. Alternatively, something that carries no overall charge.

(8) Neutralization ----------------------> (F) The chemical reaction of an acid with a base in which a salt and water are formed. If the base is a carbonate of hydrogen carbonate, carbon dioxide is also produced in the reaction.

(9) Ore -------------------------------------> (P) Ore is rock which contains enough metal to make it economically worthwhile to extract the metal.

(10) Oxidation --------------------------> (B) A reaction where oxygen is added to a substance / or when electrons are lost from a substance.

(11) pH -------------------------------------> (O) A number which shows how strongly acidic or alkaline a solution is.

(12) Pipette ------------------------------> (N) A glass tube used to measure accurate volumes of liquids.

(13) Precipitate -------------------------> (K) An insoluble solid formed by a reaction taking place in solution.

(14) Reactant ---------------------------> (M) A substance we start with before a chemical reaction takes place.

(15) Reduction -------------------------> (S) A reaction in which oxygen is removed or electrons are gained.

(16) Salt ----------------------------------> (Q) A salt is a compound formed when some or all of the hydrogen in an acid is replaced by a metal.

(17) Strong acids ---------------------> (L) These acids completely ionize in solution and have a high concentration of H⁺ (aq) ions in solution.

(18) Universal indicator ------------> (H) A mixture of indicators that can change through a range of colors to show how strongly acidic or alkaline liquids and solutions are.

(19) Weak acids ---------------------->  (D) Acids that do not ionize completely in aqueous solutions.

The molarity of a solution that contains 10.1 g of caffeine dissolved in 932 ml of solution is 0.0558 mol/L.

The molarity of a solution is defined by the number of moles of solute per liter of solution. It is given by molar concentration formula:

M = n/ V where M is the molarity of the solution, n is the number of moles of the solute, and V is the volume of solution in L.

The number of moles of the solute is the mass of the solute divided by the molar mass of the solute.

Molar mass of caffeine = 194.19 g/mol

Mass of caffeine = 10.1 g

Hence,

The number of moles of caffeine = 10.1/194.19 = 0.052 mol

Volume of solution = 932 mL or 0.932L

Hence, the molarity of the solution is:

M = 0.052 mol/0.932 = 0.0558 mol/L

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Gold has a heavy enough nucleus that its electrons must travel at speeds nearing the speed of light to prevent them from falling into the nucleus. This relativistic effect applies to those orbitals that have appreciable density at the nucleus, such as s and p orbitals. These relativistic electrons gain mass and as a consequence, their orbits contract. As these s and (to some degree) p orbits are contracted, the other electrons in d and f orbitals are better screened from the nucleus and their orbitals actually expand.

Since the 6s orbital with one electron is contracted, this electron is more tightly bound to the nucleus and less available for bonding with other atoms. The 4f and 5d orbitals expand, but can't be involved in bond formation since they are completely filled. This is why gold is relatively unreactive.

Hope it helps

Gold is relatively inert metal because, the one valence electron in 6s orbital  is not available for bonding since it is more attracted by nucleus. The 4f and 5d orbitals are completely filled and does not involve in bonding.

Some elements tends to be unreactive compared to the other by their extra stability factors. This unreactness is called inertness. The 18th group elements are all inert since they are highly stable due to completely filled electronic configuration.

Gold is 79th element in periodic table. It is a transition metal located in d-block. The electronic configuration of gold is [Xe] 4f¹⁴ 5d¹⁰ 6s¹. There is only valence electron which is in the 6s orbital.

The 4s orbital experience more nuclear pull which leads to the unavailability of the valence electron. The 4f and 5d orbitals are completely filled and does not involve in chemical bonding. That's why gold is called inert metal.

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Answer:

D

Explanation:

Bases have a bitter taste, slippery when touched and they can form hydronium ions. (they can conduct electricity.)

Answer:

The Sunlight

Oxegyn

Heat in soi

Explanation:

Answer:

sun, air, and heat.

Explanation:

hope this helps!

Answer:

false

Explanation:

Answer:

false

Explanation:

These characteristics serve as guidelines for assessing the health and quality of aquatic environments, supporting the well-being of fish and other aquatic organisms.

Water temperatures below 86°F (30°C) for warm-water fisheries and below 68°F (20°C) for cold-water fisheries: Different fish species have different temperature preferences for optimal growth and survival. Warm-water fisheries generally thrive in higher water temperatures, while cold-water fisheries prefer cooler temperatures. Water temperatures outside these ranges can stress fish and disrupt their natural habitat.

Dissolved oxygen levels above 5 mg/L: Oxygen is essential for aquatic organisms, including fish, to breathe and carry out their metabolic processes. Adequate dissolved oxygen levels are necessary to support healthy aquatic ecosystems. Oxygen can enter the water through aeration from the atmosphere, photosynthesis by aquatic plants, and mixing with flowing water.

pH between 6 and 9: pH is a measure of the acidity or alkalinity of water. Most aquatic organisms, including fish, have adapted to function within a specific pH range. A pH between 6 and 9 is generally considered suitable for supporting diverse aquatic life. Extreme pH levels outside this range can be detrimental to aquatic organisms.

Streams should be "free from" sediments: Excessive sedimentation in streams can negatively impact aquatic ecosystems. Sediments can smother fish eggs, suffocate benthic organisms, and reduce water clarity, which affects photosynthesis and the availability of food sources. Healthy streams have a natural balance where sediment inputs are minimal, allowing for clear water conditions.

These characteristics serve as guidelines for assessing the health and quality of aquatic environments, supporting the well-being of fish and other aquatic organisms. However, it's important to note that specific water quality requirements may vary for different species and ecosystems.

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When a balloon expands, the external pressure remains relatively constant due to the nature of gases and their behavior under certain conditions. To understand this concept, we need to consider the principles of gas laws, particularly Boyle's Law and Pascal's Law.

Boyle's Law states that at a constant temperature, the product of the pressure and volume of a gas is constant. In simpler terms, as the volume of a gas increases, its pressure decreases, assuming the temperature remains constant. This principle helps explain why a balloon expands when it is filled with air or any other gas.

When you inflate a balloon, you are increasing its volume by introducing more gas molecules into it. As more gas molecules are added, they start to exert force on the walls of the balloon.

However, the pressure inside the balloon also increases due to the increased number of collisions between the gas particles and the balloon's inner surface. These internal collisions create a pressure that counteracts the force exerted by the expanding balloon.

At the same time, the balloon's surface area also increases as it expands. Your intuition is correct that an increased surface area theoretically provides more opportunities for gas particles to collide with the balloon's walls.

However, the external pressure on the balloon remains relatively constant due to Pascal's Law, which states that the pressure in a fluid (in this case, the surrounding air) is transmitted equally in all directions.

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1. The answer is 217 K and the law is Charles law.

2. The law that is behind this is the Charles law. The temperature was increased and the volume increased accordingly.

Charles' Law, is a basic gas law in physics and chemistry that explains the relationship between the temperature and volume of a gas at constant pressure.

Charles' Law states that the volume of a gas is precisely proportional to its absolute temperature for a set quantity of gas under a constant pressure.

We know that;

V1/T1 = V2/T2

V1T2 = V2T1

T2 = 200 * 407/375

= 217 K

The law that is involved is Charles law

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The molarity of the HCl 0.104 M

Molarity of a solute is defined as the ratio of number of moles of solute to the volume of solution (L). Solute molarity is sometimes omitted by enclosing the solute chemical formula in square brackets. For example, the concentration of chloride ions in solution can be written as  [Cl⁻]. Molarity allows you to convert between the volume of a solution and the moles (or mass) of a solute.

For the given case,

HCl + NaOH --> NaCl + H2O

Since,

M₁V₁ = M₂V₂

M₁ = concentration of NaOH

V₁ = volume of NaOH

M₂ = concentration of HCl

V₂ = volume of HCl

Substitute the given values in the equation mentioned above:

26.18 × 0.0995 = M₂ × 25.00

2.60491 = 25 M₂

M₂ =  0.104 M

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the real gas pressure for above question was 91.4atm

what is van der waals equatio?

The Van der Waals equation (or Van der Waals equation of state) is an equation of state used in chemistry and thermodynamics that extends the ideal gas law to take into account the effects of interactions between molecules in a gas as well as accounting for the finite size of the molecules.

The ideal gas law views gas molecules as point particles that interact only with their surroundings and not with one another, which means that when they collide, they do not occupy any space or change their kinetic energy.

The volume V occupied by n moles of any gas has a pressure P at a temperature T determined by the following relationship, according to the ideal gas law, where R is the gas constant:

PV=nRT

(pxn2a/v2) (v-nb)=nRt

p 10x1.36/2.41x2.41-10x0.0318

p 13.6/2.41x2.092

nRt=p2.69

10x0.08206x300/2.69

=91.4atm

therefore the real gas pressure =91.4atm

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Answer:

H3PO4 + 3KOH ----> K3PO4 + 3H2O

Explanation:

The valency of K element is + 1 while that of PO4 compound is -3

Hence, at least 3 K atoms are needed to combine with PO4 to form K3PO4 compound.

Hence, the revised equation will be

H3PO4 + 3KOH ----> K3PO4 + 3H2O

Now, the number of atoms and charges of each element is a given equation are equal on both the left and right hand side.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{4.88 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{4.88}{6.02} \\ = 0.810631229...\)

We have the final answer as

Hope this helps you

Answer:

1. Foods that have changes that are chemically introduced.

2. corn soybeans apples etc

3. sot they last longer or look better

4. new dna is placed in them and their seeds

5. they are not as good for humans

Explanation:

Answer:i think its Humans can cause some animals to become extinct, changing the food chain.

Explanation:

The pH of the buffer solution prepared using formic acid and its conjugate base is 3.705 (approx).Hence,

the correct option is (c) 3.71.

A buffer solution was prepared using formic acid and its conjugate base.

A volume of 21.50 mL of 0.185M formic acid was mixed with 24.25 mL of 0.150M formate.

The pKa of this reaction is 3.75.

The equation of formic acid with its conjugate base is:

HCOOH ⇋ H⁺ + HCOO⁻Initially,

the moles of formic acid, and its conjugate base can be determined as follows:

Moles of formic acid,

HCOOH

= 0.185 x (21.5/1000)

= 0.0039775 moles Moles of formate, HCOO⁻

= 0.150 x (24.25/1000)

= 0.0036375 moles

Using the Henderson Hasselbalch equation,pH

= pKa + log [A⁻]/[HA]

Where, [A⁻]

= Concentration of conjugate base i.e., HCOO⁻[HA]

= Concentration of acid i.e., HCOOH pKa

= 3.75

Substituting the values into the equation,pH

= 3.75 + log (0.0036375/0.0039775) pH

= 3.75 + (-0.045) pH

= 3.705.

The pH of the buffer solution prepared using formic acid and its conjugate base is 3.705 (approx).Hence,

the correct option is (c) 3.71.

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Answer:

can you answer mine i will help you! please

Explanation:

Answer:

10.99s

Explanation:

Given parameters:

Speed of the fly = 9.1m/s

Distance flown = 100m

Unknown:

Time taken to fly this distance = ?

Solution:

Speed is distance divided by the time;

  Mathematically;

            Speed  = \(\frac{distance}{time}\)  

             Time  = \(\frac{distance}{speed }\)  

Insert the parameters and solve;

        Time  = \(\frac{100}{9.1}\)   = 10.99s