liquid water has the density of 1000.0kg/m^3. Calculate the volume occupied by 0.250kg of liquid water.

Answer:

In the given question, the mass of empty slender is given 25 points 489 Grand. The mass of Slender plus unknown liquid is given 57 points 847 g. The volume of a non liquid is given 45 three ml. We have to find the density of a non liquid. Firstly we will find the mass of unknown liquid. As the mass of unknown liquid is equal to the mass of cylinder plus unknown liquid minus the mask of empty cylinders. So the mass of a non liquid is equal to seven points 847 g -25 points 489 g. The mass of a non liquid will be 32 points 358 g. The formula to calculate the density of a non liquid is equal to the mass of a non liquid divided by the volume of a non liquid. So we will put the values as the mass of a non liquid is 32.358 g, Divided by the volume, which is given 45.3 ML. When we solve this Comes out to be 0.71 g, but I am in. So the Final answer is the density of a non liquid is equal to 0.71 g.

The carbon in Compound 3 matches the carbon in Compound 4a with an asterisk is C2. Therefore, option B is correct.

Alpha-cadinol is a cadinane sesquiterpenoid that has a hydroxy group at position 10. It acts as a fungicide and a plant metabolite.

This compound is synthesized in two main steps. In the first step, compound 1 undergoes nucleophilic addition to compound 2. Then, the product compound 3 formed will undergo intramolecular aldol condensation. This cyclic product further undergoes dehydration and forms two isomers compound 4a and compound 4b. The compound 4a only is converted to alpha-cadinol.

In the conversion of compound 3 to compound 4a, carbon 2 containing acidic hydrogen will deprotonate and attack the carbonyl of the 5-carbon ring. Therefore, the asterisk is carbon 2.

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Answer:

3 Both mass and charge are conserved.

Explanation:

The equation of the reaction is;

Cu(s) + 2Ag+ (aq) → Cu2+ (aq)  + 2Ag(s)

A redox reaction is an acronym for oxidation-reduction reaction. This refers to a reaction in which the oxidation number of one specie is increased while the oxidation number of the other specie is decreased.

This means that one specie looses electrons while the other specie gains electrons. Here, Cu(s) looses electrons while Ag+(aq) gains electrons from left to right in the reaction.

In a redox reaction, both mass and charge are conserved. This means that the total mass and charge on the reactants side is the same as the total mass and charge on the products side.

Answer:

The answer is option c.

I hope this helps you.

Answer:

The rain shadow effect

Explanation:

A rain shadow is an area of land that was forced to become a desert because a mountain or mountain range blocked all the necessary weather for plants to grow... after the air crosses over the mountains peak and begins going down the other side, the air warms up which means there's less rainfall.

0.50 L of a 1.5 m solution contains 71.4 grams of MgCl2.

The equation moles of solute = molarity x volume (in liters) can be used.

When converting to grams, we may use the molar mass of the MgCl2 to determine how many moles there are in the solution.

MgCl2 has a molar mass of roughly 95.21 g/mol.

The volume must first be changed from liters to milliliters:

0.50 L = 500 mL

Next, we may determine how many moles of MgCl2 are present in the solution:

moles of MgCl2 = molarity x volume (in liters)

moles of MgCl2 = 1.5 mol/L x 0.50 L

moles of MgCl2 = 0.75 moles

Finally, we can figure out how much MgCl2 is present in the solution:

mass of MgCl2 = moles of MgCl2 x molar mass

mass of MgCl2 = 0.75 moles x 95.21 g/mol

mass of MgCl2 = 71.4 grams

Therefore, 0.50 L of a 1.5 m solution contains 71.4 grams of MgCl2.

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Answer:

Tetrahedral

Explanation:

The molecular geometry of SiCl₄ is a tetrahedral shape. According to the VESPR molecular theory, the compound has a shape of a tetrahedron.

The compound that is shown as X can be seen in the option labelled C

The process of esterification involves the condensation of an alcohol (or phenol) with an acid to produce an ester. To create the ester bond, the water molecule must be removed from the alcohol and acid (dehydration).

Usually, an acid catalyst is used to catalyze the reaction, which makes it easier to remove water and encourages the creation of the ester. The acid catalyst aids in protonating the acid's carbonyl oxygen, which increases its electrophilicity and makes it more vulnerable to alcohol's nucleophilic attack.

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The liquid substance used in the laboratory for dissolving dry mortar on floor flies is hydrochloric acid.

Hydrochloric acid is a strong acid that can dissolve many materials, including dry mortar.

Hydrochloric acid also known as muriatic acid or sulfuric acid, are commonly used to dissolve hardened mortar or concrete residues.

To use hydrochloric acid to dissolve dry mortar, you will need to mix the acid with water in a ratio of 1 part acd to 10 parts water.

You should then apply the mixture to the dry mortar using a brush or spray botle.

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Answer:

1240.8964 mmHg

Explanation:

I believe you only need to use \(PV = nRT\) for this problem.

P = Pressure in mmHg

V = Volume in Liters

n = Number of Moles

R = Gas Constant in mmHg/1mol

T = Temperature in Kelvin

Since you start with 1.50 moles of N2 and add an additional mole of N2, you will have 2.50 moles of N2.

Assuming that the volume of the bottle does not change,

P(34.3) = (2.5)(62.363)(273)

Note that 62.363mmHg/1mol is the gas constant R.

P = ((2.5)(62.363)(273))/(34.3) = 1240.8964 mmHg (approximately)

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Numbers are placed before the elements and molecules in a chemical equation so as to balance the equation so that it has the same number of atoms of each element on each side and s denoted as option B.

This is referred to as a symbolic representation of a chemical reaction and it contains the reactants and products in it thereby providing more information.

It has numbers in front of them so as to make the equation balance as the number of atoms of elements on the reactant side must be equal to that on the product side.

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Applying physical and scientific concepts to the design, development, and maintenance of both the artificially produced environment as well as the naturally occurring built environment is known as civil engineering. The correct option is B.

In both the public and private sectors, civil engineers conceptualize, design, develop, supervise, run, and maintain infrastructure projects and systems, such as highways, buildings, airports, tunnels, dams, bridges, and water supply and sewage treatment systems.

Traditionally, civil engineering has been divided into a variety of sub-disciplines. It is defined to separate non-military engineering from military engineering and is regarded as the second-oldest engineering subject after military engineering.

A civil engineer make brainstorming ways to prevent landslides on steep slopes. In some locations, a civil engineer is qualified to do land surveying; in other locations, surveying is only permitted for building purposes without a different licence.

Thus the correct option is B.

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The Henderson-Hasselbalch equation  can be given as

\(p^{H}\) = \(pK_{a}\) + log \(\frac{[A^{-}] }{[HA]}\)

This equation relates the \(p^{H}\) , dissociation constant and concentration of acid and its conjugate base or base and its conjugate acid.

The Henderson-Hasselbalch equation can be derived as,

Let us consider the ionization of weak  acid,

HA  + \(H_{2}O\) ⇄ \(H^{+}\) + \(A^{-}\)

The dissociation constant \(K_{a}\) can be given as

\(K_{a}\) =   \(\frac{[H^{+}][A^{-}] }{[HA]}\)

Rearranging  the equation,

\([H^{+}]\) = \(K_{a}\) ×\(\frac{[HA]}{[A^{-}] }\)

Taking log on both sides,

log\([H^{+}]\) =log{ \(K_{a}\) ×\(\frac{[HA]}{[A^{-}] }\))

log \([H^{+}]\) = log \(K_{a}\) +log \(\frac{[HA]}{[A^{-}] }\)

multiplying the whole equation on both the sides

-log \([H^{+}]\) = - log \(K_{a}\)  - log \(\frac{[HA]}{[A^{-}] }\)

we know that -log \([H^{+}]\) = \(p^{H}\) and  - log \(K_{a}\)  =p\(K_{a}\)  

then, the equation can be rewritten as

\(p^{H}\) = p\(K_{a}\) - log \(\frac{[HA]}{[A^{-}] }\)

\(p^{H}\) = p\(K_{a}\) + log\(\frac{[A^{-}] }{[HA]}\)

\([A^-}]\) =  Concentration of conjugate base

[HA] = Concentration of weak acid,

So the Henderson-Hasselbalch equation can be modified  as,

\(p^{H}\) = \(pK_{a}\) + log([Conjugate base]/ [weak acid])

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As per the given balanced chemical equation  of the reaction, 2 moles or 46 g of Na needs to react with 3 moles or 84 g of N₂. Then 46.34 g of Na needs 84.6 g of N₂.

Sodium nitride, NaN₃ is an ionic compound formed by the donation of electron from the sodium metal to nitrogen atoms. The decomposition of sodium azide produce sodium metal and nitrogen gas.

As per the given balanced chemical equation  of the reaction, 2 moles or 46 g of Na needs to react with 3 moles or 84 g of N₂.

molar mass of N₂ = 28 g/mol

mass of 3 moles = 84 g

atomic mass of Na = 23 g/mol

mass of 2 moles = 46 g.

Then , mass of nitrogen gas required to react with 46.34 g of sodium is:

(46.34 ×84)/46 = 84.62 g.

Therefore, 84.62 g of nitrogen gas is used up in this reaction.

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Answer:

Explanation:

40/ 180.2 x (-16 / 1 mole glucose)=-3.6 KJ

The percent by mass of an element in a compound is obtained as the ratio of the mass of the atom to the relative molecular mass of the compound multiplied by 100.

If we look at the representations shown in the image, we will notice that the red ball symbolizes the oxygen atom while the blue ball symbolizes the nitrogen atom.

The percent by mass of nitrogen in NO is 46.7%. This is obtained as follows;

Molar mass = 14 + 16 = 30

percent by mass of nitrogen = 14/30 * 100 = 46.7%

NO is the diagram that has only one red and blue ball respectively.

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Answer:

Deer

Explanatio

The deer is most likely to be a keystone species.

This is defined as the organism which has a strong impact and defines the ecosystem.

The deer is a keystone species as many organisms depend on it as a source of food in the ecosystem.

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Answer:

geochemistry

Explanation:

geo and chemistry

The knowledge of Analytical methods has helped to determine about rocks and landforms of the earth.

Analytical chemistry is the branch of chemistry that deals with the obtaining, accessing and processing the nature and chemical composition of matter by relying on the thorough Qualitative and Quantitative  analysis.

Also,

Geology is the science that studies everything about the earth from its  structure, composition, to the processes that revolve around it  and the most effective way to use the earth;s resources.

The role of  Analytical Chemistry in Geology is very important because with the knowledge of  Qualitative and Quantitative  analysis fro Chemistry. Scientists are able  decipher the composition together with the processes that occur in the  Earth,  Solar System,Planets , Rocks and the atmosphere,.

For example, with the knowlegde of Isotopes, Carbon dating and Analytivcal ethods ( X-ray Fluorescence (XRF),Laser Ablation (LA- ICP-MS),  Inductively Coupled Plasma Mass Spectrometry (ICP-MS), carbon, hydrogen, moisture analysis and Atomic Absorption , Spectrometry (AA) has helped to determine about rocks and other landforms of the earth.

Answer:

Mass number is a whole number because it is the sum of number of proton and number of neutrons whereas atomic mass is fractional because it is the average relative mass of its atoms as compared with mass an atom of C-12 isotope taken as 12.

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Answer:

because diamond is the allotrope of carbon and diamond is the hardest substance in the world and it's melting point is very very high so it's difficult

Dalton's Atomic Theory and the Law of Definite Proportions are compatible. Hence option b that is Law of Definite Proportions agrees with Dalton's atomic theory is correct statement.

What is the atomic theory of Dalton?

The second part of the theory states that every atom in a certain element has the same mass and properties. The third part defines compounds as mixtures of two or more different types of atoms.

As a result, Dalton's theory acknowledged that all matter is composed of atoms, which is true, but it did not acknowledge the existence of smaller particles within atoms, which is incorrect.

Because compounds are made by the fusing of two or more different types of atoms, Dalton's theory, which claimed that atoms could not interact with one another, is incorrect.

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HAZWOPER training and certification recognize:

The correct option is both A and C

HAZWOPER (Hazardous Waste Operations and Emergency Response) training and certification recognize that a large number of victims (as much as 80%) in hazardous waste incidents or emergencies will self-present or be self-referred for medical treatment.

Additionally, HAZWOPER training acknowledges that victims may use any entrance they can access at a hospital, not just the emergency department entrance.

This is because individuals affected by hazardous materials may arrive at different areas of the hospital seeking medical assistance.

Therefore, option d. Both A and C are correct statements regarding the recognition of HAZWOPER training and certification.

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All the participants in the Genius Dog Challenge are Border Collies, which some experts believe to be the intelligent breed of dog.

Border Collie is the name of a breed of dog that is characterized by:

Border Collies have physical characteristics such as:

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The chemical reaction is shown by \(CaCl_{2} (aq) + K_{2} CO_{3} (aq) ----- > CaCO_{3}(s) + 2KCl(aq)\). The solvation of the KCl is shown in the image attached.

We know that a reaction is taking place when there is a change in the arrangement of the atoms that surround the reactants and then the products are formed. It is clear that there is a cleavage of the bods that surround the reactants and there is a recombination of these atoms as the products are formed. This recombination of the atoms now takes place in a different way so that we can be able to get new substances at the end of the reaction.

In this case we are looking at the kind of reaction that occurs between potassium carbonate and calcium chloride. One of the reactants is going to separate out of the solution and we would call it the precipitate. The other product is solvated by the water molecules.

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Answer: the bottom one is wave the one above is electromagnetic and the one above is transverse  

Explanation:

Answer:

It is a beta decay equation unknown

Explanation:

none