Please answer the question in the image correctly

Answer:

Formula of water:H2O

Formula of potassium chloride:KCl

For solving such problems we need to know mole concept,

Here, Volume and Concentration is given so it's so easy to find number of moles. first we have to convert volume from ml to litre and and then multiply by the concentration of NaOH:

★ Volume of NaOH = 250ml = 250 × 10⁻³ = 0.25L

★ Concentration of NaOH = 0.15 mol/L

Now, let's find the number of moles:-

Number of moles = volume × concentration

Number of moles = 0.25*0.15

Number of moles = 0.0375 mol/L

Thereafter, we have to find molar weight of NaOH and for this we have to know atomic mass of these elements:-

Na = 22g

O = 16g

H = 2g

Substitute the value

Molar weight of NaOH = 22+16+2

= 40 g/mol

Mass of NaOH = no. of moles × molar weight

= 0.0375*40

= 1.5 g/mol

Hence, We need 1.5 g /mol to make NaOH.

Answer:

true

Explanation:

cu is copper, c carbon, ca calcium

The role of conservation of linear momentum is important to your safety as a pedestrian or a motorist because you will avoid being hit by car.

The principle of conservation of linear momentum states that the sum of the initial momentum of an isolated system is equal to the sum of the final momentum.

The role of conservation of linear momentum is important to your safety as a pedestrian or a motorist because you will avoid being hit by car which is in motion, knowing that impulse you will receive will be equal to the change in the momentum of the car.

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Answer: 4707 J

Explanation:

The equation which balances the given chemical reaction between magnesium and oxygen is 2Mg + O₂ → 2MgO.

Balanced equations are those equations in which each entities present in reactant side as well as on product side is equal.

Given chemical reaction:

Mg + O₂ → MgO

Above reaction is not balanced as number of oxygens are not equal on both sides.

This is not a balanced equation as number of magnesium atom is not equal.

This is also not a balanced equation as oxygen atoms are not equal on both sides.

This is a balanced equation as number of each atoms are equal on both sides.

This is not a balanced equation as number of magnesium atom is not equal.

Hence balanced equation is 2Mg + O₂ → 2MgO.

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When NaOH solution is accidentally spilled on your skin while trying to transfer it into a pH paper, one should rinse the exposed skin with water.

Chemical reagents can be found in the laboratory and are harmful to the human skin.

However, when transferring an alkaline solution of NaOH to the pH paper and one accidentally splashes it onto the skin, water should be poured to the affected part immediately.

The water washes away the chemical before it starts to have negative effect on the skin.

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Answer:

A) Tell your teacher right away

E) Rinse the exposed skin with water

Explanation:

edge 2022 <3

Answer:

I believe the answer is C.

Explanation:

He studied cell division.

Answer: look down hope I helped

Explanation:

1) First convert to pOH as OH is the dissociating species in a base equilibrium.pH + pOH = 14 (at 25 C)pH=13, hence pOH = 1,Hence [OH] = 10^-1 Mdiluting by factor of 10 with pure water gives [OH] = 10^-2 MThe new pOH = 2, hence the new pH is 12In general, dilution (with pure water) by a factor of 10 moves the pH 1 unit in the direction of the pH of water (pH 7). i.e. it moves up for acids, down for bases.(At infinite dilution of either acids or bases, you’d have pure water - obvious when you think of it like that)

Answer:

7 hours……….5 days……….36 weeks

————- X ————— X ———————

1 day…………..1 week…………..1 year 

how many hours per year does a high school student spend in school?

1260 hours per year

Explanation:

Answer:

7 hours...............5 school days.......36 school weeks

-------------------X-----------------------X---------------------------

1 school day......1 school week.......1 school weeks

1,260 hours per week

Explanation:

edge 2023

Answer:

I believe your answer is : The dog flu virus interacts specifically with receptors on the surface of dog cells.

Explanation:

I hope this helps you :)

Pls mark brainleist :P

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Tori

Answer:

this is not the full question

[tex]\\ \rm\Rrightarrow pH=-log[H^+][/tex]

[tex]\\ \rm\Rrightarrow pH=-log[2.5\times 10^{-6}][/tex]

[tex]\\ \rm\Rrightarrow pH=-log2.5-log10^{-6}[/tex]

[tex]\\ \rm\Rrightarrow pH=-0.398+6[/tex]

[tex]\\ \rm\Rrightarrow pH=5.602[/tex]

The mass of carbon that resulted from the decomposition of 37 L of carbon dioxide is 19.8 g

CO₂ —> C + O₂

From the balanced equation above,

1 L of CO₂ decomposed to produce 1 L of C.

Therefore,

37 L of CO₂ will also decompose to produce 37 L of C

At standard temperature and pressure (STP),

22.4 L = 1 mole of C

Therefore,

37 L = 37 / 22.4

37 L = 1.65 mole of C

Thus, the mass of Carbon can be obtained as follow:

Mass = mole × molar mass

Mass of C = 1.65 × 12

Mass of C = 19.8 g

Thus, 19.8 g of carbon were obtained from the reaction.

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Answer:

that is all I know sorry hope that may help you :)

Explanation:

Indicator is a substance which shows different colors in acidic and basic medium. Indicators can be natural (derived from natural sources) or artificial ( man-made) for example :

*Litmus is an indicator. Acid turns blue litmus into red while base turns red litmus into blue

* Turmeric solution does not show change in color (remains yellow) in acidic solution and turns red in basic solution.

Answer:

The answer would be C. Flowing water is where you get energy from hydroelectric dams.

The flow of charged particles is called electricity. The flow of electrons around a circuit is called electric current.

hope it helps...!!!

The correct definition of oxidation in terms of oxygen, electron and hydrogen is added, lost , lost, (Row B).

An oxidation reaction is a reaction in which the oxidation number if the reacting species increases in a positive direction.

Therefore, the correct definition of oxidation in terms of oxygen, electron and hydrogen is added, lost , lost, (Row B).

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Answer:

Hg+2 + 2Cl- -> HgCl2

HOPE THIS HELPS HAVE A GREAT DAY/NIGHT!!~

Explanation:

The answer that  best describes what is happening in the redox reaction 4Fe + 3O2 -> 2Fe2O3 is Iron is oxidized to form rust.

Rusting is known to be a form o oxidation reaction. An iron  is known to often reacts together with the elements of water and oxygen to bring about hydrated iron(III) oxide ( rust).

Conclusively, Always note that an Iron and steel rust is formed when these elements are said to come into any form of contact with water and oxygen as as thus rusting takes place  just as seen in the redox reaction above.

See full question below

Which answer best describes what is happening in the following redox reaction?

4Fe + 3O2 -> 2Fe2O3

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Answer:

c

Explanation:

Answer:

Percentage yield=79.14%

Explanation:

Percentage yield=(Actual yield/theoretical yield)*100

Percentage yield=27.7g/35.0g*100

Percentage yield=79.14%

Answer:

A.There is no effect on the forward and reverse reactions. For an equilibrium reaction, the forward and reverse rates are always equal.

B. Both the forward and reverse reactions speed up by the same amount.

C. The forward reaction speeds up immediately. As more product is made, the reverse reaction starts to speed up as the forward reaction starts to slow down until they are equal.

D. The forward reaction slows down initially. As the reaction proceeds, the reverse reaction slows down to meet the new forward reaction.

E. The forward reaction speeds up. Eventually, production of the product speeds up the reverse reaction rate to match the new forward rate.

F. It is impossible to say without more specific information.

Explanation:

The pressure of the given mol of fluorine as an ideal gas at the given temperature and volume is 1.96atm.

The Ideal gas law or general gas equation emphasizes on the state or behavior of a hypothetical ideal gas. It states that "the pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature.

It is expressed as;

PV = nRT

Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( 0.08206 Latm/molK )

Given the data in the question;

To determine the pressure of the fluorine gas, we substitute our values into the expression above.

PV = nRT

P = nRT / V

P = ( 4.80mol × 0.08206Latm/molK × 298K ) / 60.0L

P = 117.378624Latm / 60.0L

P = 1.96atm

Therefore, the pressure of the given mol of fluorine as an ideal gas at the given temperature and volume is 1.96atm.

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Answer:

Metoprolol tartrate is the immediate-release version of metoprolol while metoprolol succinate is the extended-release version

Explanation:

This means that metoprolol succinate is released over time in the body leading to longer-acting effects. Metoprolol tartrate may need to be taken multiple times per day.

Answer:

329.65 K

Explanation:

56.5°C + 273.15 K= 329.65 K.

Hope this helps, good luck!

CO2 and H2O react to form H2CO3 and two bonds are broken each in CO and H2O to form H2CO3.

Chemical bonding refers to the forces of attraction which hold atoms of the same or different elements together in order to form stable compounds or molecules .

Chemical bonding may be either ionic or covalent.

The greater the number of bonds in a compound, the more stable the compound.

During chemical reactions, bonds are broken and new binds are formed.

There are two bonds each in CO2 and H2O.

This, in the reaction between CO2 and H2O react to form H2CO3, , the number of bonds broken in H2O is two and in CO2 is two.

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The ionic compound are crystalline solids at room temperature

Explanation:

they are quite strong because they contain strong ionic bonds

At the room temperature, ionic compound will be crystalline solids.

Ionic compounds are made up of ions kept together by the attraction of oppositely charged ions. One of the most well-known ionic compound is common salt (NaCl). Molecular compounds are made up of separate molecules that are bonded together through electron sharing.

The elements of a crystalline solid are grouped in a tightly packed microscopic structure, generating a crystal lattice that stretches in all directions.

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