How many grams of aluminum would have the same number of atoms as 6.94 g of lithium?

Answer:

Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂

Explanation:

The activity series helps us to easily define whether or not a reaction will occur.

Elements at the top of the activity series are highly reactive and will always displace those at the bottom of the series in any reaction.

With the above information in mind, let us answer the questions given above.

Ag + NaNO₃ —> Na + AgNO₃

The above reaction will not occur because Na is higher than Ag in the activity series. Thus, Ag cannot displace Na from solution.

Pb + Mg(NO₃)₂ —> Pb(NO₃)₂ + Mg

The above reaction will not occur because Mg is higher than Pb in the activity series. Thus, Pb cannot displace Mg from solution.

Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂

The above reaction will occur because Mg is higher than Fe in the activity series. Thus, Mg will displace Fe from solution.

Cu + Mg(NO₃)₂ —> Cu(NO₃)₂ + Mg

The above reaction will not occur because Mg is higher than Cu in the activity series. Thus, Cu cannot displace Mg from solution.

From the above illustration, only

Mg + Fe(NO₃)₂ —> Fe + Mg(NO₃)₂

Will occur.

Answer:

Explanation:

Bromine >Tellurium > Phosphorus > Helium > Sodium

Electron affinity of Bromine , Tellurium , Phosphorus are positive , of helium is zero and of sodium is negative .

Answer:

Idon't know if this helps but I think it is a linear structure and if I am wrong I am so sorry

The cell's reaction is not disrupted, and the electrons continue to flow between the two half-cells through the wire to produce electricity.

In a voltaic cell, a salt bridge is utilized to maintain the electrical neutrality of the half-cells. A salt bridge is an ionic conductor that allows the movement of cations and anions between the two half-cells without allowing any mixing of the electrolytes.

Its primary function is to prevent the buildup of electric charges on the electrodes, which would result in a sudden stop of the reaction in the cell.What is a salt bridge-A salt bridge is an electrolytic channel that connects the oxidation and reduction half-cells of a voltaic cell to allow ions to flow between them.

The salt bridge is essential to maintain the electrical neutrality of the half-cells and maintain the cell's electrical energy. What is the purpose of the salt bridge in this cell?In the given cell, the salt bridge purpose is to keep the electrical neutrality of the half-cells.

The salt bridge ensures that the cell's two half-cells maintain their neutrality by providing a flow of ions from one half-cell to the other. As a result, the cell's reaction is not disrupted, and the electrons continue to flow between the two half-cells through the wire to produce electricity.

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Answer:

5l NO

2

at STP

No. of molecules=

22.4

5

mol=

22.4

5

×N

A

molecules

A) 5ℊ of H

2

(g)

No. of moles=

2

5

mol=

2

5

×N

A

molecules

B) 5l of CH

4

(g)

No. of moles of CH

4

=

22.4

5

mol=

22.4

5

N

A

molecules

C) 5 mol of O

2

=5N

A

O

2

molecules

D) 5×10

23

molecules of CO

2

(g)

Molecules of 5l NO

2

(g) at STP=5l of CH

4

(g) molecules at STP

Therefore, option B is correct.

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Answer:

skip it please, ok...? thank you

Propane will release a higher amount of energy per gram than octane.

The known heat of combustion for propane is −50.3kJ/g which means that one gram of the hydrocarbon will release or give -50.3 kJ of energy. On the other hand, the heat of combustion for octane is −47.9kJ/g. The heat of combustion for octane tells us that if we burn one gram of octane, it will give 47.9 kJ of energy.

Based on the values we provide for the question, propane will release a higher amount of energy per gram than octane.

What is energy?

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The most acidic hydrogen atom is the hydrogen atom that have been bonded to the oxygen atom.

We say that a proton is an acidic proton if the proton is able to leave very easily from the rest of the compound. We know that there are several factors that could make a proton that is found in a molecule to become a labile or an acidic proton. The acidity of a proton largely stem from the fact that electron density between the hydrogen atom and the atom to which it is bonded is weak. As such, the bond is weakened by the lengthening of the bond and a consequent lability of the attached hydrogen atom as discussed here.

In the compounds as shown, the most acidic proton is the proton that is attached to the oxygen atom. This is because, the extensive conjugation in the molecule withdraws electrons from  the 0-H bond and this makes the hydrogen atom to become labile or acidic.

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Answer:The colour and distribution of the organism's biochromes

Explanation:

The colour and distribution of the organism's biochromes (pigments), particularly the relative location of differently coloured areas; the shape, posture, position, and movement of the organism; and the quality and quantity of light striking the organism

Answer:

D) alkaline

Explanation:

Answer:

Beryllium, because it is in period 2 and has four total electrons.

Explanation:

Answer:

Its carbon

Explanation:

The sample of hair with exposed follicular tissue is the BEST sample she can send to the lab for DNA testing (Option C).

A DNA sample is any tissue that can be used to extract DNA and therefore it is multipurpose because it can be used to identify an organism, identify polymorphisms, find gene variants associated with a phenotype of interest., etc.

Therefore, with this data, we can see that the sample of a follicular tissue contains DNA which can be used for different purposes such as the identification of an individual.

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Answer:

volume

Explanation:

this is because gallon is a unit of volume.

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The property of the gas that was used by the chemist's report is volume. The correct option is D.

Volume is a scalar quantity that is used to measure the space occupied by a three-dimensional object. In terms of liquid and gas, the volume is measured as the capacity of the container that contains a liquid.

Gas is a state of matter that has no regular shape and no fixed volume. They have the lowest density and their moles are farthest from each other.

Gallon is a unity of volume that is used in the metric system of the United States. There are 100 gallons of gas in the container, the volume of gas is the total number of moles of the gas in a container.

Thus, the correct option is D. Volume.

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Answer:

No, no precipitate is formed.

Explanation:

Hello there!

In this case, since the reaction between silver nitrate and sodium acetate is:

\(AgNO_3(aq)+NaC_2H_3O_2(aq)\rightarrow AgC_2H_3O_2(s)+NaNO_3(aq)\)

In such a way, we can calculate the concentration of silver and acetate ions in the solution as shown below, and considering that the final total volume is 50.00 mL or 0.0500 L:

\([Ag^+]=\frac{20.00mL*0.077M}{50.00mL}=0.0308M\)

\([C_2H_3O_2^-]=\frac{30.00mL*0.043M}{50.00mL}=0.0258M\)

In such a way, we can calculate the precipitation quotient by:

\(Q=[Ag^+][C_2H_3O_2^-]=0.0308*0.0258=7.95x10^{-4}\)

Which is smaller than Ksp and meaning that the precipitation does not occur.

Regards!

Answer:

NH3

Explanation:

The "tri" attached to the trihydride means 3. So your hydrogen is going to have 3 atoms.

Answer:

All Answers only for the elite; Nomenclature of Covalent Compounds Quiz

You're Welcome :)

Explanation:

A-hydrochloric acid

B-sulfuric acid

C-dinitrogen pentoxide

C- IBr3

A- carbon dioxide

B- Start the name with hydro-.

B- H3BO3

C-sulfur trioxide

A- NH3

B- The chemical name ends with “hydroxide.”

Answer:

Hydrogen and Oxygen

Explanation:

The amount in grams of ammonium sulfate are needed to make a 0.25L solution at a concentration of 6 M is 198 grams.

Mass (W) in grams from moles (n) of any substance will be calculated by using the below equation as:

n = W/M, where

M = molar mass

And for this question moles will be calculated by using the below formula:

M = n/V, where

M = molarity of the solution = 6M

V = volume of the solution = 0.25 L

On putting values on the above equation, we get

n = (6)(0.25) = 1.5 moles

Now mass of 1.5 moles of ammonium sulfate will be calculated by using the first formula as:

W = (1.5mol)(132g/mol) = 198g

Hence required mass of ammonium sulfate is 198 grams.

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Answer:

.....

Explanation:

D0wnload Phot0Math......................

Answer: Photosynthesizing organisms use carbon dioxide and water to produce glucose.

Explanation:

Photosynthesis is a phenomenon in which green plants containing chlorophyll use sunlight as a source of energy to convert carbon dioxide and water to form glucose and oxygen.

Photosynthesis is the process used by plants, algae and certain bacteria to convert energy from sunlight and turn it into chemical energy in the form of glucose which is used a s a source of energy by many organisms.

\(6CO_2+6H_2O\overset{sunlight}\rightarrow C_6H_{12}O_6+6O_2\)

Carbon atoms 1 - 7 are all sp2 hybridized carbon atoms while carbon 8 is sp3 hybridized.

The term hybridization has to do with the mixing of atomic orbitals in order to obtain molecular orbitals that are of appropriate energy and can be able to participate in bonding. The idea of hybridization is rooted in the valence bond theory.

Now we have the compound as has been shown in the image attached to the question, there are carbon atoms that have been numbered from one to eight. We are to identify the hybridization pattern in each atom.

We can see that atoms 1 - 7 are all sp2 hybridized carbon atoms while carbon 8 is sp3 hybridized.

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4.75gram of silver nitrate is required to react with 16.5 g of calcium iodide. The balanced equation is

\(CaI_{2} +2AgNO_{3}\rightarrow 2AgI+Ca(NO_{3})_{2}\)

Stoichiometry is a part of chemistry that help us in making relationship between reactant and product from quantitative aspect.

The balanced equation is

\(CaI_{2} +2AgNO_{3}\rightarrow 2AgI+Ca(NO_{3})_{2}\)

The mole ratio of calcium iodide to silver nitrate is 1:2

Moles of calcium iodide = 2×moles of silver nitrate

mass of calcium iodide ÷Molar mass of calcium iodide = 2×moles of

                                                                                                    Silver nitrate

                                                                                                       16.5÷[20+2(126)]= 2×moles of silver nitrate

16.5÷293.88= 2×moles of silver nitrate

0.056= 2×moles of silver nitrate

0.028= moles of silver nitrate

0.028×Molar mass of silver nitrate=mass of silver nitrate

0.028×169.87= mass of silver nitrate

4.75gram= mass of silver nitrate

Thus 4.75gram of silver nitrate is required to react with 16.5 g of calcium iodide

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Answer:

Step-by-step explanation-

A suspension is a heterogeneous mixture of a fluid that contains solid particles sufficiently large for sedimentation.

Particles are big enough to be visible to the eye and eventually with time they settle to the bottom of the container. The maximum amount of solute can be separated through physical methods like filtration.

In the mentioned cases all of them except salt in water are suspensions since the particles of each of them are big enough and do not get dissolved in water easily and can be separated from the mixture.

The reduction half-reactions for O, P, and Cu:

• O: O2 + 4 e- → 2 O2-

• P: HPO42- + 2 H+ + 2 e- → H3PO4

• Cu: Cu2+ + 2 e- → Cu+

To write the reduction half-reactions for O, P, and Cu, we need to determine the oxidation numbers for each element. The guidelines for assigning oxidation numbers are:

Using these guidelines, we can determine the oxidation numbers for O, P, and Cu:

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The reagents that can be used to achieve of the following transformation is Na2Cr207, H2S04, H20 and PCC, CH2Cl2.

What is chemical reaction?

One or more chemicals, known as reactants, are changed into one or more new substances, known as products, during a chemical reaction. Chemical elements or chemical compounds constitute substances.

In the chemical reaction, 2 butanol is converted to 2 butanone by using oxidizing agent like PCC, ch2cl2 or other reagent is na2cr2o7, h2so4, h2o used this reagent where secondary alcohol is converted to ketone.

Therefore, the reagents that can be used to achieve of the following transformation is Na2Cr207, H2S04, H20 and PCC, CH2Cl2.

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Answer:

Explanation:

a) this is alpha decay since the helium particle is a product

b) is alpha capture since the heliom particle is a reactant

Answer:

0.4

Explanation:

Given parameters:

Mass of NaCl  = 0.564g

Mass of KCl  = 1.52g

Mass of LiCl = 0.857g

Unknown:

Mole fraction of KCl = ?

Solution:

First, find the number of moles of the given species;

     Number of moles  = \(\frac{mass}{molar mass}\)

Molar mass of KCl  = 39 + 35.5 = 74.5g/mol

Molar mass of NaCl  = 23 + 35.5 = 58.5g/mol

Molar mass of LiCl  =  7 + 35.5  = 42.5g/mol

  Number of moles of KCl  = \(\frac{1.52}{74.5}\)   = 0.02mol

  Number of moles of NaCl  = \(\frac{0.564}{58.5}\)   = 0.0096mol

  Number of moles of LiCl  = \(\frac{0.857}{42.5}\)   = 0.02mol

Sum of moles  = 0.02mol + 0.0096mol + 0.02mol  = 0.0496mol  

Mole fraction of KCl  = \(\frac{0.02}{0.0496}\)   = 0.4

Answer:

.4

Explanation:

Answer:

2.10 h

Explanation:

Step 1: Given data

Step 2: Convert the distance between the two cities to km

We will use the relationship 1 km = 0.62 mi.

195 mi × (1 km/0.62 mi) = 315 km

Step 3: Calculate the time required for the train to travel 315 km

315 km × (1 h/150.0 km) = 2.10 h

Answer: 67.5

Explanation:

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