Is my answer correct?

Answer:

158 mol :)

Explanation:

Execute Order 66________________

The mass of LiOH needed to make a 300 mL of a solution with a pH of 11.33 is 0.015 g

We'll begin by calculating the pOH of the solution.

pH = 11.33

pOH =?

pH + pOH = 14

11.33 + pOH = 14

Collect like terms

pOH = 14 – 11.33

pOH = 2.67

pOH = –Log [OH⁻]

2.67 = –Log [OH⁻]

–2.67 = Log [OH⁻]

Take the as antilog of –2.67

[OH⁻] = antilog (–2.67)

LiOH(aq) —> Li⁺(aq) + OH⁻(aq)

From the balanced equation above,

1 mole of LiOH contains 1 mole of OH⁻

Therefore,

0.0021 M LiOH will also contain 0.0021 M OH⁻.

Molarity of LiOH = 0.0021 M

Volume = 300 mL = 300 / 1000 = 0.3 L

Mole = Molarity × volume

Mole of LiOH = 0.0021 × 0.3

Mole of LiOH = 0.00063 mole

Molar mass of LiOH = 7 + 16 + 1 = 24 g/mol

Mass = mole × molar mass

Mass of LiOH = 0.00063 × 24

Therefore, the mass of LiOH needed to prepare the solution is 0.015 g

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Answer:

26.2kPa is the partial pressure of nitrogen

Explanation:

Assuming the partial pressure of Carbon dioxide is 0.070atm

The total pressure of a mixture of 3 gases (CO2, O2 and N2) is:

Total pressure = Partial pressure CO2 + Partial pressure O2 + Partial pressure N2

0.070atm CO2 are:

0.070atm * (760mmHg / 1atm) 53.2mmHg

Replacing:

930mmHg = 53.2mmHg + 680mmHg + Partial pressure N2

Partial Pressure N2 = 196.8mmHg

In kPa -101.325kPa = 760mmHg-

196.8mmHg * (101.325kPa / 760mmHg) =

Answer:

mark me brainliest

Explanation:

An acid is a substance that has a pH lower than 7. For example, hydrochloric acid, sulphuric acid, citric acid, ethanoic acid (vinegar). A base is a substance that neutralises an acid – those that dissolve in water are called alkalis. An alkali is a soluble substance with a pH higher than 7.

Answer:

The chemical which give hydrogen ion when dissolve in water is called acid.for example:HCL,HNO3,H2SO4 etc.

The bases that dissolve in water and produce hydroxyl ions are called alkalis.for example:NaOH,KOH etc.

Explanation:

Answer:

A

Explanation:

Answer Explanation:

If it is like H, or O or N or Na or Cl, those are the elements. Those are on the Periodic table. pH is the acidity and basicity of a substance, how acidic or basic(caustic) it is. mol is Moles. kPa is kilopascals. STP is standard temperature and pressure, at 0*C(Celsius), or 273.15 K(Kelvin), and 101,325 pascals, or 101.325 kilopascals.

Avagadro's Number is 6.022x10^23, the number of atoms in a mole. The Ideal Gas Law is P(Pressure in kPa) times V(Volume in L, liters) equals n(number of moles of gas) times R(the universal gas constant, or 8.3145 (L kPa/K mol) or 8.3145 liters kilopascals per Kelvin mole. that is just a few of them.

Answer:

The answer is D

The last one

4a. D - The last number in the configuration represents the group, in this case 3, and the number of shells represent the period, which is also 3.

4bi. Rubidium metal reacts very rapidly with water to form a colourless solution of rubidium hydroxide (RbOH) and hydrogen gas (H2). The resulting solution is basic because of the dissolved hydroxide. The reaction is very exothermic and explosive.

4bii. Lithium is smaller in size than potassium . so valence electrons are more tightly held in Li than K. Due to larger size of K the valence electrons are loosely held and easy to remove the electron from K. Hence K is more reactive.

Answer:

Due to presence of similar protein.

Explanation:

The two mice are different from one another due to their different parents so in that way the physical features of both mice are different from one another. Both mice have the same protein for whisker thickness in their cells that leads to same whisker in both mice. The common feature in both mice are the protein that is responsible for whisker thickness so both have same whisker on their face.

Answer:

The new volume of the gas is 276.45 mL.

Explanation:

Charles's law indicates that for a given sum of gas at constant pressure, as the temperature increases, the volume of the gas increases, and as the temperature decreases, the volume of the gas decreases.

Charles's law is a law that mathematically says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:

[tex]\frac{V}{T} =k[/tex]

Analyzing an initial state 1 and a final state 2, it is satisfied:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{250 mL}{293 K} =\frac{V2}{324 K}[/tex]

Solving:

[tex]V2=324 K*\frac{250 mL}{293 K}[/tex]

V2= 276.45 mL

The new volume of the gas is 276.45 mL.

Answer:

Hello There!!

Explanation:

I believe the answer is O They form compounds with very bright colors.

hope this helps,have a great day!!

~Pinky~

The statement about noble gases that is correct is D. They form compounds with very bright colors.

Noble gases simply refers to the elements that have similar properties. Noble gases are colorless, odorless, and have very low reactivity.

Examples of noble gases are helium, argon, Krypton, xenon, etc. Noble gases also form compounds with very bright colors.

In conclusion, the correct option is D.

Read related link on:

https://brainly.com/question/24070118

Answer:

Is this the full question?

Answer: The earth is closer to the sun than neptune is

Explanation:

Answer:

The Earth is closer to the Sun than Neptune is.

Explanation:

pov

Answer:

340 grams Ca₃P₂ (2 sig. figs.)

Explanation:

   3Ca     +     2P     =>    Ca₃P₂

5.6 mole + excess =>   ? grams

Convert the 'known' to a coefficient of 1 by dividing all coefficients by 3.

=>  Ca   +   2/3P   =>    1/3Ca₃P₂

From the above, 1 mole of Ca => 1/3 mole Ca₃P₂  

∴ 5.6 mole Ca in an excess of P => 1/3(5.6 mole) Ca₃P₂

=> 1.8666 mol Ca₃P₂ (calculator answer) ≅ 1.9 mol Ca₃P₂

=> 1.9 mole x 182 g Ca₃P₂/mol Ca₃P₂ = 339.73333 grams Ca₃P₂

≅ 340 grams Ca₃P₂ (2 sig. figs.)

Answer:

135.80 g of Ag

Explanation:

[tex]40gCu *\frac{1mol Cu}{63.546g Cu} *\frac{2mol Ag}{1molCu} *\frac{107.868g Ag}{1mol Ag}[/tex]

~ 135.80 g of Ag

Answer:

I think it's C

Explanation:

Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!

Answer:

I think the answer is, 100.

Explanation:

but i dont know try

Answer:  g/mol

Explanation:

The gram formula mass of  CuSO 4  is  159.60 g/mol  

Multiply the subscript for each element by its molar mass (atomic mass on periodic table in g/mol). Then add the results. This will give you the molar mass of the compound (mass of 1 mole).

Cu : ( 1 × 63.546 g/mol )   = 63.546 g/mol

S : ( 1 × 32.065 g/mol )      = 32.06 g/mol

O : ( 4× 15.999 g/mol )     =  63.996 g/mol

CuSO 4 :  63.546 g/mol  +  32.06 g/mol  + 63.996 g/mol  = 159.60 g/mol  (rounded to two decimal places)

Answer:

Diamond and graphite forms of carbon, silicon dioxide (silica)

thenks and mark me brainliestt pls :))

Answer:

Diamond and graphite forms of carbon) and silicon dioxide (silica) are examples of giant covalent structures (lattices) of atoms. All the atoms in these structures are linked to other atoms by strong covalent bonds and so they have very high melting points.

Answer:

the answer is c carbon dioxide and water

I think the answer is organelles.

Reaction 1 :-

Reaction 2 :-

Answer:

A, increases the average kinetic energy of the molecules

Explanation:

temperature is a measure of the average kinetic energy of particles (atoms, ions and molecules), if one raises the temperature, one is raising the average kinetic energy of the particles.

Answer:

1.62 * 10^-11 J

Explanation:

Nitrogen-14 nucleus has seven neutrons and seven protons. So;

Total mass of protons = 7(1.00728 amu)

Total mass of neutrons = 7(1.00866 amu)

Total mass of nucleons = 7(1.00728 amu) + 7(1.00866 amu)= 14.11158 amu

Mass of Nitrogen-14 nucleus = 14.00307 amu

Mass defect = 14.11158 amu - 14.00307 amu = 0.10851 amu = 1.801852171 * 10^-28 Kg

Binding energy = Δmc^2

Where;

Δm = mass defect

c = speed of light

Binding energy = 1.801852171 * 10^-28 Kg * (3 * 10^8)^2

Binding energy = 1.62 * 10^-11 J

Answer:

0.10851 amu

1.62

-11

Explanation:

Yw

Answer:

fomula; ( x = mutiplacation btw)

% m/m = m(solute) / m(solution) x 100%

0.50g x 70% = m/m x 100%

0.5g x 70% / 100% = 3.5 g KI

(both % cancle each other)

Explanation:

heads up might be wrong i did it myself