g/cm3 is a unit of density. Density is which type of property.

Question 3 options:

physical; extensive


chemical; intensive


physical; intensive


chemical; extensive

Answer:

Venus

Explanation:

From the sun outwards is   Mercury   Venus  Earth  and then Mars

6.02 x 10^23 atoms = 1 mole

3.2526443 x 10^23 / 6.02 x 10^23 = 0.54 mole

Non-combustible

eg:-glass,water,stone, Portland cement etc ...

Answer:

Noncombustible

Explanation:

So

Some examples are ,glass ,stone

Answer:

The blanks can be completed with words in the following sequence

1) elements

compound

2) atom

3) matter

4) compound

5) chemistry

6) reactants

product

Explanation:

In H2SO4, atoms of hydrogen, sulphur and oxygen represent different elements that are combined to form the compound.

The smallest indivisible unit of matter that still retains all the properties of matter is an atom. Matter is anything that has weight and occupy space.

Atoms combine in fixed ratios to form compounds. Chemistry studies matter scientifically and pays specific attention to the changes that matter undergoes.

Considering the reaction of photosynthesis, water and carbon dioxide combine to give glucose so the water and carbon dioxide  are reactants while the glucose is the product of the reaction.

Explanation:

For one thing, Net volume = Final volume - Initial volume

The result of this calculation follows the rule of subtraction.

(For addition and subtraction problems, the answer should be rounded to the same number of decimal places as the measurement with the least number of decimal places.)

So, in case in point is:

Trial 2

Initial = 1.2 mL

Final = 2.45 mL

Net = 2.45 - 1.2 = 1.25 = 1.3 (follow the rule from above)

Please, take a look and apply the rule mentioned.

------

The average volume per drop is well done (3 significant figures)

------

Answer:

C

Explanation:

It can already be seperated because the mixture hasn't disolved into the water yet.

Algunas acciones viables para utilizar los recursos ambientales de forma racional y con el objetivo de reducir la contaminación son:

Es fundamental para la preservación y mantenimiento del medio ambiente y la calidad de vida de las generaciones actuales y futuras. El desarrollo de acciones sostenibles promueve la protección del medio ambiente, los ecosistemas y los recursos naturales.

Por lo tanto, todas las personas e instituciones económicas pueden promover la sostenibilidad a través de prácticas fáciles de ejecutar que ayuden a preservar y proteger el medio ambiente.

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The graduated cylinder is used to measure the volume of KOH and H2SO4 when accurate volume measurement is not required.

In the laboratory certain graduated apparatus are used to measure liquids. These graduated apparatus used to measure liquids include;

Sometimes, we are not really looking for a strictly accurate volume of liquid and we can use a graduated cylinder to measure the volume of liquid in such cases.

However, when we need to have strictly accurate volume measurement, we need a pipet or a buret.

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Answer: OMG EMMM, PLZ ANSWER ME, I REALLY MISS U , plz come back...

Explanation:

An atom's ground state is its lowest energy conceivable state, in which all of its electrons are at their lowest possible energy levels.

The energy levels of the atoms match the rows of the Periodic List of Elements when you look at it. The last electrons of the two elements on the top row, hydrogen and helium, are filling their initial energy level.

The second energy level of the eight components in the second row is being filled. The chemical characteristics of an element are determined by its outermost electrons.

Starting with the level nearest to the nucleus, the energy levels were built up. By using the Aufbau Principle, electrons are filled in by moving from the initial lowest-energy level to a second, slightly higher energy level, and finally to the third, even higher energy level.

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Answer:

and the siren goes wee-woo to what ever the circut

decides.Explanation:

The molar masses of Mg and Fe are:

Magnesium oxide:

Mass of oxygen = 1

Mass of magnesium = 1.5

Molar mass of magnesium = (1.5 / 1) × 16 = 24

Iron oxide:

Mass of oxygen = 1

Mass of iron = 3.5

Molar mass of iron = (3.5 / 1) × 16 = 52

The accepted molar masses of Mg and Fe are 24.305 g/mol and 55.845 g/mol, respectively. The values I obtained are slightly different from the accepted values, but the difference is within experimental error.

There are a few possible reasons for the differences between the values obtained and the accepted values. One possibility is that the compounds used were not pure. Another possibility is that an error was made in calculations. Finally, it is also possible that the accepted values are not accurate.

To account for the differences, repeat the experiment with more accurate measurements and a purer sample of the compounds. Also check the accepted values to make sure they are accurate.

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Burning, 4800 cm3 of sulfur dioxide in air produces 4.8L of sulfur trioxide. Three varieties of sulfur trioxide can be discovered.

Sulfur trioxide is the chemical compound with the SO formula. "Unquestionably, the much more commercially significant" sulfur oxide has been said to exist. It is produced in enormous quantities as a precursor to sulfuric acid.

2SO₂ + O₂ →  2SO₃

The limiting reactant

Molar ratio between SO₂ and SO₃ which is 2:2.

1000cm³ = 1L

4800cm³ × 1L/1000cm³

= 4.8L

Thus,  4.8L is the volume.

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Answer:

2, strong acid

Explanation:

Data obtained from the question. This includes:

[H+] = 0.01 M

pH =?

pH of a solution can be obtained by using the following formula:

pH = –Log [H+]

pH = –Log 0.01

pH = 2

The pH of a solution ranging between 0 and 6 is declared to be an acid solution. The smaller the pH value, the stronger the acid.

Since the pH of the above solution is 2, it means the solution is a strong acid.

Answer:

C. reproduction​

Explanation:

Answer:

KBr is limiting reactant.

Explanation:

Given data:

Mass of  KBr =4g

Mass of Cl₂ = 6 g

Limiting reactant = ?

Solution:

Chemical equation:

2KBr + Cl₂      →    2KCl + Br₂

Number of moles of KBr:

Number of moles = mass/molar mass

Number of moles = 4 g/ 119 gmol

Number of moles = 0.03 mol

Number of moles of Cl₂:

Number of moles = mass/molar mass

Number of moles = 6 g/ 70 gmol

Number of moles = 0.09 mol

Now we will compare the moles of reactant with product.

              KBr            :            KCl

                2              :              2

            0.03            :            0.03

             KBr            :              Br₂

                2             :               1

             0.03           :          1/2×0.03= 0.015

               Cl₂             :            KCl

                 1              :              2

            0.09            :           2/1×0.09 = 0.18

               Cl₂             :              Br₂

                1              :               1

             0.09           :            0.09

Less number of moles of product are formed by the KBr thus it will act as limiting reactant while Cl₂  is present in excess.

Most of the weather of the world is based upon changes in the moisture, pressure or temperature of the troposphere.

The layer closest to the surface of the Earth is troposphere. This layer goes up to twenty kilometers above the Earth. The troposphere is very essential as it contains the weather of the Earth and also greenhouse gases to maintain the temperature on Earth.

Troposphere layer has the air humans breathe and the clouds in the sky. The air is densest in this lowest layer and the troposphere has three-quarters of the mass of the entire atmosphere. The air in troposphere is 78% nitrogen and 21% oxygen.

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Answer:

A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation:

The mass of Hg in the sample is 17.1g.

One of the fundamental quantities in physics and the most fundamental feature of matter is mass. The quantity of matter in a body is referred to as its mass. The kilogram, the standard international unit of mass (kg). You can write the mass formula as follows:

Mass = Density × Volume

The water weighs 1400 g. And one night later, we grew by one. Therefore, multiplying X 12.2 by 1400 multiplied by a million. We therefore possess 0.01708 grammes of mercury. When converted to milligrams, this amount equals 17.1 milligrams of mercury.

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The values of entropy δs for the water, the surroundings, and the universe for the evaporation of water are positive, negative, positive.

What is entropy?

Entropy is a term used to describe the increase in disorganization inside a system or the assessment of the degree of unpredictability. It is denoted by  δs.

Gases have a higher entropy than liquids, which in turn has a higher entropy than solids. The entropy of water increases when it transforms from a liquid to a gas.

So, δs of water is positive.

The environment's entropy must decrease in order to provide the system with the thermal energy it needs.

So, δs of surroundings is negative.

The Second Law of Thermodynamics states that if a process is spontaneous i.e. water evaporation in universe.

So, δs of evaporation from open pan is positive.

The values of δs for the water, the surroundings, and the universe for the evaporation of water are positive, negative, positive.

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Answer:

Ron and Hermoine

Explanation:

They always fought over petty things, but at the end, they did end up together!

(Answer for your question about love and friendship being a central theme in Harry Potter and the Philosopher's stone)

*ALSO, MY ANSWER MIGHT BE WRONG* so be sure to use a pencil just in case!

The cake should weigh 265 grams ordinarily. However, it could weigh less.

According to the law of conservation of mass, masses can neither be created nor destroyed during the course of chemical reactions. However, masses can be converted from one form to another.

Going by this law, the mass of the resulting cake from the illustration should be the cumulative mass of the ingredients of the cake.

However, during the process of baking, some mass might have been converted to gas and escaped into the atmosphere. Thus, the final cake may weigh less than the cumulative mass of the ingredients.

In the absence of conversion of mass to gas and no ingredient spillage during the entire process, the mass of the cake should be the cumulative mass of the ingredients.

Thus:

Mass of the cake = 150 + 70 + 45

                            = 265 grams

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In Margarita's experiment, type of fertilizer is independent variable and number of flowers are dependent variables.

Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.

There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change

Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.

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Gasoline, which is composed of a variety of different liquid hydrocarbons that do not separate as time passes is an example of compound.

A compound is a substance formed by chemical union of two or more ingredients in definite proportions by weight.

A compound is a type of pure substance that does not separate easily via chemical or physical means.

According to this question, gasoline is composed of a variety of different liquid hydrocarbons, which do not separate as time passes.

Gasoline is specifically a liquid consisting of a mixture of refined petroleum hydrocarbons and is mainly used as a motor fuel e.g. petrol.

This suggests that gasoline is an example of a compound because it is made up of several other substances that do not separate readily.

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At 457.3 K temperature, the vapour pressure will be higher, for the given substance and its heat of vapourization.

The pressure that a vapour exerts on its condensed phases in a closed system when they are in thermodynamic equilibrium with one another at a specific temperature is known as vapour pressure. A liquid's evaporation rate can be determined by looking at the equilibrium vapour pressure.

Calculation:

The Clausius-Clapeyron equation is as follows:

ln (P2/P1) = ∆Hvap/R * (1/T1 - 1/T2)

ln (8.008) =  (26.64 * 10³J/mol) / (8.314J/mol/K) * {(1/287K) - (1/T2) }

2 = (3.2 * 10³/K) * {(T2 - 287K)/ (287T2 * K)

0.000625/K * 287T2 * K = T2 - 287K

179.375K = T2 -287K

T2 = 457.3K.

Hence, at 457.3 K temperature, the vapour pressure will be higher.

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The energy a mosquito obtains when biting a human is derived from the nutrients present in the blood, which serve as a source of sustenance and facilitate the reproductive cycle of female mosquitoes.

When a mosquito bites a human, it does not directly obtain energy in the form of electricity or any other conventional type of energy. Instead, the mosquito gains sustenance through its feeding behavior. Mosquitoes are hematophagous insects, meaning they feed on the blood of other animals, including humans.

The energy obtained by a mosquito from biting a human comes from the nutrients present in the blood. Mosquitoes have evolved specialized mouthparts that enable them to pierce the skin and access blood vessels. Once they penetrate the skin, they release saliva containing enzymes that prevent blood clotting, allowing them to extract the necessary nutrients.

The primary source of energy for mosquitoes is the sugar found in nectar, which provides them with the fuel required for flight and basic metabolic processes. However, female mosquitoes require additional nutrients, such as proteins and iron, which are crucial for egg development. By biting a human and consuming blood, female mosquitoes acquire these essential nutrients, which contribute to their reproductive capabilities.

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(1) The element with an electron configuration of    1s22s22p63s23p64s23d6 is Iron (Fe).

The above electronic configuration is the repesentation of the electrons presents in different orbitals of the iron(Fe) .we have seen that all orbitals is completely filled before D orbital.

(2) The element with an electron configuration of 1s22s22p63s23p6 is Argon (Ar)

The above electronic configuration is the repesentation of the electrons presents in different orbitals of the Argon(Ar) .we have seen that all orbitals  is completely filled.

(3) The name of the element with a valence electron configuration of 4s1 is Potassium (K)

The above electronic configuration is the repesentation of the electrons presents in different orbitals of thePotassium (K) .we have seen that all orbitals  is completely filled before  4s1.

(4) The name of the element with a valence electron configuration of 2s22p5 is Flourine (F)

The above electronic configuration is the repesentation of the electrons presents in different orbitals of the Flourine (F) .we have seen that all orbitals  is completely filled before  2p5.

A. An element with the valence electron configuration 3s1 would form a monatomic ion with a charge of +1. In order to form this ion, the element will lose one electron from the 3s subshell.

B. An element with the valence electron configuration 3s23p3 would form a triatomic ion with a charge of -3. In order to form this ion, the element will gain three electrons from the 3s and 3p subshells.

Elements achieve an inert gas configuration by gaining or losing electrons to attain a full valence shell of electrons, resulting in a stable electron configuration. This is also known as having a complete octet in their outermost energy level.

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