I need help on dis chem shi if y’all can answer fa me I would appreciate dat

Answer:

The initial  E°  for the second cell is the same as for the first cell.

Explanation:

Because the overall chemical reaction that occurs in the cell does not change.

The first galvanic cell generated the cell potential of +1.10 V. The second galvanic cell generates the same cell potential because the overall cell reaction remains the same.

The galvanic cell is given as the electrochemical cell that generates the exchange of chemical and electrical energy.

The cell potential is described as the rate of reaction with the difference in the potential of the cathode and the anode.

The reduction and the oxidation potential are governed by the number of electrons transferred in the chemical reaction.

In the second galvanic cell, the number of electrons transferred from the copper electrode will be equivalent to the first electrode, as the chemical reaction is the same. Thus, the cell potential of the second galvanic cell will be the same as the first cell.

Learn more about galvanic cell, here:

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Answer:

오빠nsuensojee9ejenheie

Answer:

I think 50 ml but I am not sure

sorry

Answer: 4.5

Explanation: Got it right on the exam. Hope this helps!

Answer:

pH = 4

Explanation:

Given that,

The concentration of [H⁺] is [tex]10^{-4}\ M[/tex]

We need to find the pH of the solution. We know that,

[tex]pH=-log[H^+][/tex]

Also,

HNO3 → H+ + NO-3

Put all the values,

[tex]pH=-log[1\times 10^{-4}]\\\\pH=4[/tex]

So, the pH of the solution is equal to 4.

Answer:

2-Methylhexane

Because Ethylexane does not have hydrogen molecules neither,also it only has 2 options but they're just repeated

Answer:

HNO3 & H2SO4

Explanation:

HNO3 is Nitric acid and H2SO4 is Sulphuric acid

Answer:

The balance equation of Ca(OH)2 + HCl ---> CaCl2 + H2O​

is

Ca(OH)2(s) + 2HCl(aq) ---> CaCl2(aq) +2H2O​ (l) (balanced equation)

Answer:

The chemical formula of diphosphorus monoxide is OP2.

I'm not sure if this is correct, but hope it helps! :)

Answer:

A they share two covalent bonds

Answer:

0.313 M NaOH

Explanation:

Got it right on the test.

Taking into account the definition of molarity, the molarity of the solution is 0.313 M.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

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

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

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case, you know:

Replacing in the definition of molarity:

[tex]molarity=\frac{0.75 moles}{2.40 L}[/tex]

Solving:

molarity= 0.313 M

Finally, the molarity of the solution is 0.313 M.

Learn more about molarity:

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Answer: B. Fire is releasing energy

Explanation:

Answer:  0.695 mol/L

Explanation:

To find the final concentration of the solution, we must first identify the moles of the solute (NaNO₃):

   moles = mass ÷ molar mass

∴ moles of NaNO₃ = 325 g ÷ 84.995 g/mol

                              =  3.824 mol

Now, since the final volume is 5.5 L and this volume contains the 3.824 moles of NaNO₃,

then the molarity of the solution = 3.824 mol ÷ 5.5 L

                                                     =  0.695 mol/L

Answer:

A group is a column of elements in the periodic table of the chemical elements.

So, the columns on the periodic table are called groups.

Answer:

Explanation:

Basically in metallic bonds, valence electrons are not localied which means they can freely move from one atom to another. Thus, they move in "sea of electrons" because in a sea water or waves are freely moving without any localization.

Hope that helps.

Answer:

Tribhuvan University is a university in Tribhuvan, Nepal. Tribhuvan University (TU) is a pioneering higher education institution in Nepal, having been founded in 1959. ......

Pokhara University... Kathmandu University...

Purbanchal University is located in Purbanchal, India.

Lumbini Bauddha University (LBU) is a university in Lumbini, Nepal...

Nepal Sanskrit University is a university dedicated to the study of Sanskrit in Nepal.

Midwestern University is a public university in the Midwest...

Nepal Open University is a public university in Nepal.

Explanation:

Answer:

B). The rocks are being chemically weathered by the water.

Explanation:

Because the water is slowly destroying the rock

Answer:

3.02 moles

Explanation:

Converted using mole calculator.

Answer:

[tex]\boxed {\boxed {\sf 3.02 \ mol \ Ag}}[/tex]

Explanation:

We want to convert grams of silver to moles of silver. We can do this in 2 steps.

We can convert grams to moles using the molar mass. It tells us the mass of 1 mole of a substance.

This is a value found on the Periodic Table. It is the same value as the atomic mass, but the units are grams per mole (g/mol) instead of atomic mass units (amu). Look up silver's molar mass.

Let's make a ratio using the molar mass.

[tex]\frac{107.868 \ g\ Ag}{ 1 \ mol \ Ag}[/tex]

Since we are converting 326 grams to moles, we multiply by that value.

[tex]326 \ g\ Ag*\frac{107.868 \ g\ Ag}{ 1 \ mol \ Ag}[/tex]

Flip the ratio so the units of grams of silver cancel.

[tex]326 \ g\ Ag*\frac{ 1 \ mol \ Ag}{107.868 \ g\ Ag}[/tex]

[tex]326*\frac{ 1 \ mol \ Ag}{107.868}[/tex]

[tex]\frac{ 326}{107.868} \ mol \ Ag[/tex]

[tex]3.02221233359 \ mol \ Ag[/tex]

The original measurement of mass (326 grams) has 3 significant figures, so our answer must have the same.

For the number we found, that is the hundredth place. The 2 in the thousandth place (3.02221233359) tells us to leave the 2 in the hundredth place.

[tex]3.02 \ mol \ Ag[/tex]

A silver watchband with a mass of 326 grams is equal to 3.02 moles of silver.

19.6 × ( 1 mol KOH / 56 grams KOH )

= 0.35 mol KOH

_________________________________

0.35 mol KOH ×( 2 mol H2O / 2 mol KOH )

= 0.35 mol H20

_________________________________

0.35 mol H2O × ( 18 g H2O / 1 mol H2O )

= 6.3 grams H2O

Answer: [tex]836.8\ J[/tex]

Explanation:

Given

Mass of water in the sample is [tex]m=100\ g[/tex]

Temperature changes from [tex]25^{\circ}C[/tex] to [tex]27^{\circ}C[/tex]

Change in temperature is [tex]\Delta T=27-25=2^{\circ}C\ \text{or}\ 2\ K[/tex]

We know, specific heat of water is [tex]c=4.184\ J/g-K[/tex]

Heat absorbed is given by

[tex]\Rightarrow Q=mc\Delta T\\\Rightarrow Q=100\times 4.184\times 2\\\Rightarrow Q=836.8\ J[/tex]

Thus, water absorbs [tex]836.8\ J[/tex] of heat from hot plate.

Answer:

I think its option C

Explanation:

Answer:

C. Hydrocarbons

Explanation:

I think it is C

Answer: 22

Explanation:

Answer: The conclusion that best support the observation is that (A CHEMICAL CHANGE took place).

Explanation:

A chemical reaction is defined as the process by which two or more substances, which are often referred to as REACTANTS, combine through bond formation or dissociation of bonds to form new PRODUCTS. In this type of reaction, a CHEMICAL CHANGE occurred because a new substance is formed as a result of the chemical reaction that took place.

There are different characteristics of a reaction which shows that a chemical change has occurred, these includes:

--> Color Change

--> Production of an odor

--> Change of Temperature

--> Evolution of a gas (formation of bubbles)

-- Precipitate (formation of a solid)

From the chemical reaction in the given question, Lithium metals reacts slowly with water to form a colourless solution of lithium hydroxide (LiOH) and hydrogen gas (H2). Here we observe that the buzzing sound of formed gas bubbles shows that a gas was given off. Therefore in conclusion, a CHEMICAL CHANGE took place.

Answer:

Explanation:

Latent heat of fusion, also known as enthalpy of fusion, is the amount of energy that must be supplied to a solid substance (typically in the form of heat) in order to trigger a change in its physical state and convert it into a liquid (when the pressure of the environment is kept constant). For example, the latent heat of fusion of one kilogram of water, which is the amount of heat energy that must be supplied to convert 1 kg of ice without changing the temperature of the environment (which is kept at zero degrees celsius) is 333.55 kilojoules

The latent heat of fusion of a substance also accounts for the energy required to accommodate any increase in the volume of the substance post the change of its physical state. The temperature at which the substance undergoes the phase transition is called the melting point of the substance. Unless specified to be otherwise, the pressure of the environment (when expressing the latent heat of fusion of a substance) is always assumed to be 1 atmosphere of pressure (which is roughly equal to 101.325 kilopascals).

Answer:

Force is measured in Newtons, which are units that equal 1 kg * m/sec 2. Force is measured in Newtons, N. Mass is measured in kilograms, kg. The unit that is used to measure force in the SI system of units is the Newton.

Answer is Newtons because I looked it up

Answer:

I think it's because he was presumed dead after a storm, or like a problem with his suit

Explanation: I think it was because somebody thought he was dead in the storm? And the remaining of the crew were forced to leave him behind thinking he was dead on mars.

I might be right, might not ^^