How many ions are in
1.50 grams of Na+

Answer:

Mass = 6.538 g

Explanation:

Given data:

Mass of zinc hydroxide produced = 9.65 g

Mass of zinc required = ?

Solution:

Chemical equation:

Zn + 2MnO₂ + H₂O      →      Zn(OH)₂ + Mn₂O₃

Number of moles of zinc hydroxide:

Number of moles = mass/molar mass

Number of moles = 9.65 g/ 99.42 g/mol

Number of moles = 0.1 mol

now we will compare the moles of zinc and zinc hydroxide,

                  Zn(OH)₂           :          Zn

                       1                  :          1

                    0.1                  :         0.1

Mass of zinc required:

Mass = number of moles × molar mass

Mass = 0.1 mol × 65.38 g/mol

Mass = 6.538 g

Answer: 6.35

Explanation:

Answer:

they bonding

Explanation:

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Answer:

Yes

Explanation:

All elements and compounds are regarded as pure substances. Whereas mixtures are classified as impure substances.

The characteristics of pure substances are:

These characteristics perfectly fits those of elements and compounds.

Because any natural element used in the cathode produced negative particles that bent to a positive charge, scientists concluded that ll atoms contained negative electrons.

A polarized electrical device's cathode is the electrode from which a regular current exits. The abbreviation CCD, which stands for Cathode Current Departs, might be used to remember this definition. Positive charges move in the direction described by a conventional current.

A cathode is a drawback. As an electron donor, it functions. It serves as an acceptor of electrons. The anode of an electrolytic cell is where the oxidation reaction occurs.

The negatively charged ions are drawn to the cathode, which is the negative electrode. Lead ions travel through the metal use negatively charged terminal of the battery and onto the lead ions because metal ions are usually positive. There must be a way to remember cathodes and anodes, cations and anions.

Thus, option A is correct.

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Answer:

H2CO

Explanation:

9514 1404 393

Answer:

  about 16.5 cm³

Explanation:

Volume, mass, and density are related by ...

  volume = mass/density

  volume = (285 g)/(17.3 g/cm³) ≈ 16.5 cm³

Answer:

oxidation

Explanation:

the process or result of oxidizing or being oxidized.

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The percentage composition of the alloy : 19.35% Zn, 80.65%Ag

Given

2.55 gram of an alloy

170 cc (170 ml=0.17 L) of  Hydrogen gas(H₂)

Ar Zn = 65. H=1

Required

The percentage composition

Solution

Silver remained unsolved⇒no reaction

Hydrogen gas from reaction of Zn

Zn+2HCl⇒ZnCl₂ + H₂

mol H₂ at STP (STP⇒1 mol = 22.4 L) :

[tex]\tt \dfrac{0.17}{22.4}=0.00759~moles[/tex]

From equation, mol ratio Zn : H₂ = 1 : 1, so mol H₂ = 0.00759

Mass Zn :

[tex]\tt mass=mol\times Ar\\\\mass=0.00759\times 65\\\\mass=0.49335~g[/tex]

Mass Silver :

[tex]\tt 2.55-0.49335=2.05665~g[/tex]

Percent composition :

[tex]\tt \dfrac{0.49335}{2.55}\times 100\%=19.35\%[/tex]

[tex]\tt \dfrac{2.05665}{2.55}\times 100\%=80.65\%[/tex]

Answer:

In the nucleus of an atom ,there are protons & neutrons. Protons have charge of 1.6× 10^-19 C, while neutrons have 0C charges. Electrons orbit outside the atom. Their charge is - 1.6 ×10^-19C

Explanation:

Answer:

Mass =  11.16 g

Explanation:

Given data:

Mass of hydrogen = 8 g

Mass of oxygen = 10 g

Mass of water produced = ?

Solution:

Chemical equation:

2H₂ + O₂         →      2H₂O

Number of moles of hydrogen:

Number of moles = mass / molar mass

Number of moles = 8 g/ 2 g/mol

Number of moles = 4 mol

Number of moles of oxygen:

Number of moles = mass / molar mass

Number of moles = 10 g/ 32 g/mol

Number of moles = 0.31 mol

now we will compare the moles of hydrogen and oxygen with water.

                   O₂          :           H₂O

                    1            :             2

                  0.31         :            2/1×0.31 = 0.62

                  H₂           :            H₂O

                    2            :              2

                     4            :              4

Number of moles of water formed by oxygen are less this it will act as limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 0.62 mol × 18 g/mol

Mass =  11.16 g

Answer:

Most likely A. Molten lava, since it straight up melts the equipment which is much faster than chemicals dissolving the equipment like hydrochloric acid and nitric acid.

Explanation:

Hope this helped!

P.S. Sure, why not?

Answer:

the answer to this question is option A mark me as brainliest

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Answer:

3Cu(NO3)2 + 2Al —> 2Al(NO3)3 + 3Cu

Explanation:

From the question given above,

Copper (II) nitrate reacts with aluminum to form aluminum nitrate and copper. This can be obtained represent as follow:

Cu(NO3)2 + Al —> Al(NO3)3 + Cu

Thus, we can balance the above equation as follow:

Cu(NO3)2 + Al —> Al(NO3)3 + Cu

There are 2 atoms of N on the left side and 3 atoms on the right side. It can be balance by putting 3 in front of Cu(NO3)2 and 2 in front of Al(NO3)3 as shown below:

3Cu(NO3)2 + Al —> 2Al(NO3)3 + Cu

There are 3 atoms of Cu on the left side and 1 atom on the right side. It can be balance by putting 3 in front Cu as shown below:

3Cu(NO3)2 + Al —> 2Al(NO3)3 + 3Cu

There are 2 atoms of Al on the right side and 1 atom on the left side. It can be balance by putting 2 in front of Al as shown below:

3Cu(NO3)2 + 2Al —> 2Al(NO3)3 + 3Cu

Thus, the equation is balanced.

Explanation:

A) Highest occupied energy level and Group Number.

Answer:

Rain shadow

Explanation:

Climate is the average weather condition of a place over a long period of time.

The image shows a rain shadow effect around a mountainous region. The type of rainfall controlled this way is known as an orographic rainfall.

Answer:

conduction

Explanation:

Conduction happens when 2 objects with different temperatures come in contact with each other. The heat transfers from the hotter object to the cooler object.Apr

Answer: Conduction

Explanation: Conduction: Conduction happens when 2 objects with different temperatures come in contact with each other. The heat transfers from the hotter object to the cooler object.

Answer:

0.8333 L. P1v1=p2v2

Explanation:

I dont now if this is wht you were looking for so srry

The pressure of the gas at which the final volume of the gas has been 3 L has been 0.833 atm.

The gas has been assumed to be at constant temperature. The change in the pressure and volume of gas at constant temperature can be given by:

Initial pressure × Initial volume = Final pressure × Final volume

The initial pressure of gas has been 0.5 atm, and the initial volume has been 5L. The increased volume or final volume of the system has been 3 L.

The final pressure of the gas has been given by:

0.5 atm × 5 L = 3 L × Final pressure

Final pressure = 0.833 atm.

The pressure of the gas at which the final volume of the gas has been 3 L has been 0.833 atm.

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Answer:

c

Explanation:

Because they are in the wild and they move a lot because they freedom. They are easy to close but you can not position so it is c. Pls tell if I am wrong.

Answer:

Option B Liquid and Gas

Answer:

The molar concentration of a solution made with 3.744 g of Mg(NO₃)₂ dissolved in enough water to make 50.0 mL of solution is [tex]0.5 \frac{moles}{L}[/tex]

Explanation:

Molarity or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.

The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:

[tex]molarity=\frac{number of moles}{volume}[/tex]

In this case:

So, the molar mass of Mg(NO₃)₂ is:

Mg(NO₃)₂= 24.3 g/mole + 2*(14 g/mole + 3*16 g/mole)= 148.3 g/mole

So, if you have 3.744 g of Mg(NO₃)₂, you can apply the following rule of three: if 148.3 grams of Mg(NO₃)₂ are present in 1 mole, 3.744 grams in how many moles are present?

[tex]moles=\frac{3.744 grams*1mole}{148.3 grams}[/tex]

moles= 0.025

Then you have:

Replacing in the definition of molarity:

[tex]molarity=\frac{0.025 moles}{0.05 L}[/tex]

you get:

[tex]molarity=0.5 \frac{moles}{L}[/tex]

The molar concentration of a solution made with 3.744 g of Mg(NO₃)₂ dissolved in enough water to make 50.0 mL of solution is [tex]0.5 \frac{moles}{L}[/tex]

The molar concentration of the solution is 0.506 M

The molar concentration of a solution is known as molarity. The molarity of a solution is defined as the moles of a solute per liter of a solution.

It can be expressed as:

[tex]\mathbf{Molarity = \dfrac{moles \ of \ solute}{volume \ of \ the \ solution}}[/tex]

The relation used in determining the number of moles is:

[tex]\mathbf {number \ of \ moles = \dfrac{mass}{molar \ mass}}[/tex]

[tex]\mathbf {number \ of \ moles = \dfrac{3.744 \ g}{148.3 \ g/mol}}[/tex]

[tex]\mathbf {number \ of \ moles = 0.0253 \ g/mol}[/tex]

∴

[tex]\mathbf{Molarity = \dfrac{moles \ of \ solute}{volume \ of \ the \ solution}}[/tex]

[tex]\mathbf{Molarity = \dfrac{0.0253 \ g/mol}{0.05 \ L}}[/tex]

[tex]\mathbf{Molarity =0.506 \ M}[/tex]

Therefore, we can conclude that the molar concentration of the solution is 0.506 M

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Answer:

0.085 moles of  N₂O₅ are needed

Explanation:

Given data:

Mass of NO₂ produces = 7.90 g

Moles of N₂O₅ needed = ?

Solution:

2N₂O₅       →     4NO₂  + O₂

Number of moles of NO₂ produced :

Number of moles = mass/ molar mass

Number of moles = 7.90 g/ 46 g/mol

Number of moles = 0.17 mol

now we will compare the moles of NO₂   with N₂O₅.

                NO₂          :       N₂O₅

                  4            :          2

                0.17          :         2/4×0.17 = 0.085 mol

Thus, 0.085 moles of  N₂O₅ are needed.

The reaction is missing, so i have attached it.

Answer:

C. An intramolecular aldol condensation

Explanation:

From the attached image showing the reaction, we can see that the left hand side of the reaction has 2 carbonyl groups which are the double bonds attached to the oxygen atoms.

Now, on the right hand side, we can see that a six member ring has been formed.

This 6 member ring is produced because one of the carbonyls on the left hand side was deprotonated at the alpha position thereby serving as a nucleophile, which then attacks the carbon in the other carbonyl.

This process is possible because it underwent the processes of deprotonation, intramolecular aldol addition, proton transfer and elimination to yield the right hand side product which is ɑ,β-unsaturated carbonyl compound.

Thus, the correct answer is option C

Explanation:

hope it will help you. Wishing a nice day. enjoy with your answer

The products will be:

CO2

SO2

H2O

Answer:

c, d, e

Explanation:

Got it right on edge

Answer:

CaCO₃

Explanation:

Calcium ion is written as Ca²⁺

Carbonate ion is written as CO₃²¯

During bonding, the +2 ions from the calcium and the –2 ions from the carbonate will cancel out given a net charge of zero as shown below:

Ca²⁺ + CO₃²¯ —> CaCO₃

Thus, the correct formula for the ionic compound that forms when oppositely charged ions of calcium and carbonate attract is CaCO₃.

Answer:

The four elements most commonly found in living things are carbon, nitrogen, hydrogen, and oxygen.

Explanation:

The four elements most commonly found in living things are carbon, nitrogen, hydrogen, and oxygen.

Answer:

This question is incomplete as it lacks the number of moles of Bromine. The complete part is as follows: 0.0900 moles of bromine liquid participate in a chemical reaction.

The answer is 7.191g

Explanation:

The number of moles in a substance can be calculated thus;

moles = mass/molar mass

Atomic mass of Bromine = 79.9g/mol

According to the question, the chemist determines by measurements that 0.0900 moles of bromine liquid participate in a chemical reaction. To calculate the mass of bromine liquid that participates, we say;

Mass = moles × molar mass

Mass = 0.0900 × 79.9

Mass = 7.191g

Therefore, 7.191g of Bromine will participate in the chemical reaction.