How many grams of H2O are in 34.2 grams of NAOH
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The molar mass of the unknown gas is 8.05 g/mol.

The ratio of effusion of an unknown gas to oxygen is 0.50:1, which means that the effusion rate of the unknown gas is half that of oxygen. Effusion is the process by which a gas escapes through a tiny hole into a vacuum, and the rate of effusion is directly proportional to the square root of the gas' molar mass. So, we can use this relationship to calculate the molar mass of the unknown gas.

Let's assume that the molar mass of oxygen is 32 g/mol. Then, the square root of the molar mass of oxygen is √32 = 5.66. If the effusion rate of the unknown gas is half that of oxygen, then the square root of its molar mass is 0.5 * 5.66 = 2.83. Taking the square of 2.83 gives us 8.05, which is the molar mass of the unknown gas.

Therefore, the molar mass of the unknown gas is 8.05 g/mol.

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Answer:gold iron and uranium

Explanation:

Answer:

iron, density: 7.8 g/cm³

aluminum, density: 2.7 g/cm³

silver, density: 10.5 g/cm³

lead, density: 11.3 g/cm³

Explanation:

other ones wrong

Answer:

Yes, our continents are always slowly moving due to tectonic plates moving  underneath the earths surface.  :)

Explanation:

Answer:

by plate tectonics

Explanation:

plate tectonics is the process of earths place moving at a slow pace which is about only 1 to 2 cm a year

The spot labeled (B) would be phosphorus (P). Labeled (G) would be 13.

Atoms contain protons and neutrons in their nuclei and electrons in their shells.

The atomic number of an atom is the number of protons in its nucleus. The mass number of an atom is the number of protons and neutrons in its nucleus.

For neutral atoms, the number of protons and electrons is the same.

(B) has 15 protons. The element with an atomic number of 15 is phosphorus (P).

(A) has an atomic number of 13, thus, the number of protons (G) will also be 13.

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Answer:

One type of evidence that strongly supported the Theory of Continental Drift is the fossil record. Fossils of similar types of plants and animals in rocks of a similar age have been found on the shores of different continents, suggesting that the continents were once joined.

Explanation:

Students were asked to describe evidence of Plate Tectonic Theory.

descriptions listed above accurately describe evidence supporting Plate

Tectonic Theory. Student 3 describes "glacial evidence indicates that different continents were once connected near the South Pole."

The widely recognized scientific hypothesis known as plate tectonics states that the Earth's lithosphere was made up of many major tectonic plates that have already been gently migrating since around 3.4 billion years ago.

The south pole would be one of two locations on Earth's surface at which the planet's axis of rotation crosses it. It is often referred to as one of the Geographic south pole, Terrestrial South Pole, and 90th Parallel South.

The fossil record is such sort of evidence that has been used to support the Claim of Continental Drift. On the coastlines of many continents, fossils of specific kinds of plants, as well as animals have been discovered in rocks that are comparable in age, indicating that the continents had been connected.

Students were asked to describe evidence of Plate Tectonic Theory.

descriptions listed above accurately describe evidence supporting Plate

Tectonic Theory. Student 3 describes "glacial evidence indicates that different continents were once connected near the South Pole."

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Yes, you could put sucrose in a glass of water to cause hydrolysis of the sucrose and make glucose and fructose. This process is called hydrolysis, where a sugar molecule is broken down into smaller sugar molecules using water.

In the case of sucrose, it is a disaccharide made up of glucose and fructose molecules joined together. When sucrose is added to water, the water molecules break the bond between glucose and fructose, causing them to separate. This results in the formation of glucose and fructose molecules in the water.

However, the hydrolysis of sucrose in water is not an immediate process. It requires the presence of an enzyme called sucrase, which is responsible for breaking down the sucrose into glucose and fructose. In the absence of sucrase, the hydrolysis of sucrose in water would be slow and incomplete.

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Answer:

314mL OR 0.314L

Explanation:

this requires the dilution formula M1V1 = M2V2 where

M1 = initial concentration

V1 = initial volume

M2 = final concentration

V2 = final volume

In this case, we are solving for V1 where M1 = 5.65M, V1 = 250.0 mL, and M2 = 4.50M

Plugged into the equation we get:

(5.65M)(250.0mL) = (4.50M)V2

divide both sides by 4.50M and it becomes (M cancel)

V2 = 314mL

Answer:

–253.5 °C

Explanation:

We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO₂ = 6 g

Mole of CO₂ =.?

Mole = mass / molar mass

Mole of CO₂ = 6 / 44

Mole of CO₂ = 0.136 mole

Next, we shall convert 225 mL to L.

1000 mL = 1 L

Therefore,

225 mL = 225 mL × 1 L / 1000

225 mL = 0.225 L

Next, we shall determine the temperature of the gas. This can be obtained as follow:

Pressure (P) = 0.855 atm

Volume (V) = 0.225 L

Number of mole (n) = 0.136 mole

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =?

PV =nRT

0.855 × 0.255 = 0.136 × 0.0821 × T

0.218025 = 0.0111656 × T

Divide both side by 0.0111656

T = 0.218025 / 0.0111656

T = 19.5 K

Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 19.5 K

T(°C) = 19.5 – 273

T(°C) = –253.5 °C

Therefore, the temperature of the gas is –253.5 °C

Answer:

Yes

Explanation:

By definition, the equilibrium constanct, Kc, for the reaction A ⇒ 2B is

= [A]^1 / [B]^2

Substitute [A] = 4 and [B] = 2 in the equation,

[A]^1 / [B]^2

= 4^1 / 2^2

= 1

= Kc

So yes the reaction is at equilibrium.

Let's find K_c

\(\\ \rm\Rrightarrow K_c=\dfrac{[B^]^2}{[A]^1}\)

\(\\ \rm\Rrightarrow 1=\dfrac{2^2}{4}\)

\(\\ \rm\Rrightarrow 1=\dfrac{4}{4}\)

\(\\ \rm\Rrightarrow 1=1\)

Yes it's at equilibrium

The central silicon atom expands the octet because it is bonded with 9 electrons, and the Lewis structure of SiF₅ reveals that there are 5 single bonds and no double bonds in the compound.

Fluoride in silicon pentoxide SiF₅ is a covalent compound created when silicon and fluorine share electrons. The 14th element, silicon, has four valence electrons. So, in order to reach octet, it needs 4 more electrons.

The 17th element, fluorine, has seven valence electrons. So, to reach an octet, one electron is required. Each F shares one of its valence electrons with silicon, giving silicon more electrons than an octet by receiving nine. Each of the five bonds is a single bond.

The charge on the main atom is created by the one extra pair of electrons. The compound thus does not follow the octet rule.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Element. An element is a pure material with only one type of atom that is incapable of being physically or chemically divided into two or more simpler compounds.

As a result, when gold is broken down, gold is still the result. It is a constituent. It is a thick, soft, malleable, ductile, brilliant, somewhat orange-yellow metal in its purest form. Gold belongs to the group 11 family of elements and is a transition metal. It is one of the least reactive chemical elements and, under normal circumstances, is solid. A specific element cannot be broken down into simpler compounds at the atomic level by normal physical or chemical processes. Oxygen, carbon, helium, mercury, copper, and gold are a few examples of elements that you could be familiar with.

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Answer:

The density of the liquid is 3 g/mL.

Explanation:

Equation of density:

D = m/v

Plug in the known information:

D = 45 g / 15 mL

Solve:

D = 45 g / 15 mL

D = 3 g/mL

15. F

16. E

17. H

18. B

19. G

20. i

21. A

22. C

23. D

You're welcome :)

Answer:

cactus

Explanation:

Its a plant so it makes it own food

Li2O > K2O > Rb2S is the order of given compounds lattice energy in the increasing order

Lattice energy is a measure of the strength of the electrostatic attraction between the positively charged cations and negatively charged anions in an ionic compound. The greater the lattice energy, the stronger the electrostatic attraction and the more stable the compound.The most common method for determining lattice energy is the Born-Haber cycle. This method uses thermochemical data of the individual steps in the formation of an ionic compound to calculate the lattice energy. However, it is often impractical to use this method in a test environment, so a more practical method that is used to compare lattice energies of different compounds is the use of the Coulomb's law which relates the lattice energy to the charge product of the cations and anions and the distance between them.

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We would require 13.5 moles of AgNO₃ to make 6.75 moles of  Cu(NO₃)₂1

The balanced chemical equation for the reaction between silver nitrate (AgNO₃) and copper (Cu) is:

2AgNO₃ + Cu -> Cu(NO₃)₂ + 2Ag

According to the stoichiometry of the reaction, 2 moles of AgNO₃ react with 1 mole of Cu to produce 1 mole of Cu(NO₃)₂ and 2 moles of Ag. Therefore, if 6.75 moles of Cu(NO₃)₂ are produced, the number of moles of Cu that reacted is also 6.75 moles.

To determine the number of moles of AgNO₃ required, we can use the ratio of moles of Cu to moles of AgNO₃ in the balanced equation. This ratio is 1:2, meaning that for every mole of Cu, 2 moles of AgNO₃ are needed.

Therefore, to produce 6.75 moles of Cu(NO₃)₂, we would need 2 × 6.75 = 13.5 moles of AgNO3.

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Answer:

A

Explanation:

The actual formula of the hydrate is \(Mg(NO_{3} )_{2}.6H_{2}O\)meaning there are six water molecules associated with each molecule of \(Mg(NO_{3} )_{2}\)

To calculate the actual formula of the hydrate, we need to determine the number of water molecules present in the compound of magnesium, \(Mg(NO_{3} )_{2}\)

Given:

Mass of the hydrate = 8.15 g

Mass of water driven off = 3.44 g

First, we calculate the mass of anhydrous \(Mg(NO_{3} )_{2}\) by subtracting the mass of water from the mass of the hydrate:

Mass of anhydrous \(Mg(NO_{3} )_{2}\) = Mass of hydrate - Mass of water

Mass of anhydrous \(Mg(NO_{3} )_{2}\) = 8.15 g - 3.44 g = 4.71 g

Next, we calculate the moles of anhydrous \(Mg(NO_{3} )_{2}\) using its molar mass:

Molar mass of \(Mg(NO_{3} )_{2}\) = 148.31 g/mol

Moles of anhydrous \(Mg(NO_{3} )_{2}\) = Mass of anhydrous \(Mg(NO_{3} )_{2}\) / Molar mass of \(Mg(NO_{3} )_{2}\)

Moles of anhydrous \(Mg(NO_{3} )_{2}\) = 4.71 g / 148.31 g/mol = 0.0317 mol

Finally, we determine the ratio of moles of water to moles of anhydrous \(Mg(NO_{3} )_{2}\):

Moles of water = Mass of water / Molar mass of water

Moles of water = 3.44 g / 18.015 g/mol = 0.191 mol

The ratio of moles of water to moles of anhydrous \(Mg(NO_{3} )_{2}\) is approximately 0.191:0.0317, which simplifies to approximately 6:1.

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The reason that best supports the choice of the liquid stream bending when the balloon approached is that the liquid reacts readily with rubber.

1. When Andrew rubbed the balloon on a woollen jumper, the friction caused the balloon to become negatively charged.

This is known as static electricity.

2. The negatively charged balloon can attract or repel other objects depending on their electrical properties.

3. When the balloon is brought near the liquid streams, it interacts with the molecules or particles in the liquid.

4. In the case of the liquid stream that bends, it indicates that there is an interaction between the balloon and the liquid that causes a deflection or movement.

5. The fact that the liquid stream bends suggests that it has a property that allows it to react with the rubber balloon.

6. Rubber is known to have a high affinity for certain substances, and if the liquid stream readily reacts with rubber, it would exhibit a noticeable interaction when the balloon is brought close to it.

7. This interaction could be due to chemical reactions, surface tension, or other adhesive forces between the liquid and the rubber surface.

In conclusion, the best reason supporting the choice is that the liquid stream bends because it reacts readily with rubber, indicating an observable interaction between the liquid and the rubber balloon.

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Answer:

I did it in steps in the picture I just hope it helps you to understand:)

Answer:

mechanical energy to electrical energy to light energy

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

CH₄  + 20₂   → CO₂   +  2H₂O

Explanation:

The reaction equation that supports the law of conservation of mass is the one in which the number of atoms on both sides of the expression are found to be the same.

The law of conservation of mass states that "in a chemical reaction, matter is neither created nor destroyed".

 The reaction expressions are given as:

                 Zn   +   HCl →  ZnCl₂   +  H₂

                      2H₂O →  H₂   + O₂

                AlCl₃  + H₂O   → CH₄  +   Al(OH)₃  

              CH₄  + 20₂   → CO₂   +  2H₂O

In the highlighted reaction above:

                         Number of atoms

                  Reactants                                       Products

C                          1                                                   1

H                          4                                                  4

O                          4                                                  4

Answer:

1.67g/cm3

Explanation:

The formula for density is \(d=\frac{m}{v}\) . The m variable stands for mass and the v variable stands for volume.

The mass of the brown sugar is 10.0g and the volume is 6.0cm3, so we can plug those values into the equation.

\(d=\frac{10g}{6cm^{3} }\)

\(d=1.67\)\(\frac{g}{cm^{3} }\)

Rounded to 3 significant figures, the density of the block of brown sugar is 1.67 g/cm3. If the mass is in grams and the volume is in cm3, the unit for the final answer is \(\frac{g}{cm^{3} }\) (grams per centimetres cubed).

Answer:

16g

Explanation:

The N - H and the C- O  and the C- N bonds in indigo dye are polar on nature.

Indigo is a blue dye that is derived from the leaves of certain plants. The chemical structure of indigo consists of two benzene rings connected by a nitrogen atom. The molecule has several polar bonds due to the electronegativity differences between the atoms.

The polar bonds in indigo include:

The nitrogen-carbon bonds: The nitrogen atom in the middle of the molecule is connected to two carbon atoms, one in each benzene ring. Nitrogen is more electronegative than carbon, so the nitrogen-carbon bonds are polar.

The carbon-oxygen bonds: Indigo has two oxygen atoms that are double bonded to carbon atoms in the benzene rings. Oxygen is more electronegative than carbon, so the carbon-oxygen bonds are also polar.

The carbon-nitrogen bond: The nitrogen atom in the middle of the molecule is also connected to a carbon atom in one of the benzene rings. This bond is polar due to the electronegativity difference between carbon and nitrogen.

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According to stoichiometry and balanced chemical equation 10 iron atoms  react with 30 molecules of chlorine.

Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is important in balancing chemical equations.It is useful in chemical calculations while making solutions of different concentrations.

Two atoms of iron reacts with 6 molecules of chlorine , so  for 30 molecules of chlorine it is, 30×2/6=10 atoms of iron.

Thus, 10 atoms of iron will react with 30 molecules of chlorine.

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Answer:

candles

Explanation:

if u burn these fruits, it is obvious that there will be ashes but the key hint here is

" retaining the smell"

and what are things that smell and can be fruit scented?

a..... CANDLE

hope this helped :D

Answer:

BY BURNING A CANDLE WITH ITS SCENT

Explanation:

All of the properties such as ice floating on water, while most solids would sink when placed in its liquid are all due to the structure of the compounds.

The structure of the compounds includes the bonding angle, the type of bonds, the size of the molecule,  the interactions between the molecules etc.  Slight changes in the chemical structure and affect the properties if the compound.

Isomeric compounds with the same  chemical formula but different structures can have different melting and boiling point and differ in reactivity and flammability.

Another common change in isomers are with the double bonds.  A double bond can be in the cis formation or in the trans formation, and this will affect its properties as trans isomers will be having high melting point than the cis isomer.

Thus, structure of compounds  do determine the properties of the compounds.

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Answer:

2Na + 2H2O → 2NaOH + H2

Explanation:

This is the balanced equation of,

Sodium + water → sodium hydroxide + hydrogen