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3 years ago

1.15.7 cm3 of HCl completely neutralised 25 cm3 of LiOH. The HCl was 2 mol/dm3.The equation is :

Chemistry

1 answer:

Whitepunk [10]3 years ago

8 0

Answer:

C₂ = 1.26 mol/dm³

Explanation:

Given data:

Volume of HCl =V₁ = 15.7 cm³

Volume of LiOH = V₂ = 25 cm³

Concentration of HCl =C₁ = 2 mol/dm³

Concentration of LiOH =C₂= ?

Solution:

Chemical equation:

LiOH + HCl → LiCl + H₂O

Formula:

C₁V₁ = C₂V₂

by putting values,

15.7 cm₃× 2 mol/dm³ = C₂× 25 cm³

C₂ = 15.7 cm₃× 2 mol/dm³ / 25 cm³

C₂ = 31.4 cm₃.mol/dm³ / 25 cm³

C₂ = 1.26 mol/dm³

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Why is stoichiometry is used in cooking?

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Answer:

Explanation:

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3 years ago

A particular brand of gasoline has a density of .737g/mL at 25 C. How many grams of this gasoline would fill a 14.1 gal tank (1

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3 years ago

A box contains a mixture of small copper spheres and small lead spheres. The total volume of both metals is measured by the disp

kirill115 [55]

Answer:44.01% of the spheres are copper

Explanation:

mass Cu + mass Pb = 4.35kg = 4.35 x 1000 = 4350g

But

Volume= mass / density

Let the volume of copper be C

density of Cu = 8.94 g/cm^3

Mass of copper = 8.94C

Let the volume of Lead be L

density of lead = 11.34g/cm^3

Mass of lead = 11.34L

Since

mass Cu + mass Pb = 4350kg

therefore

8.94C + 11.34L = 4350g----- EQN A

also

volume of copper + volume of lead = 423 cm^3

Volume of Lead ,L=423-C

putting the value of C = 423-L in Equation A becomes

8.94C + 11.34L = 4350g

8.94C + 11.34(423-C)= 4350g

8.94C+ 4796.82-11.34C=4350

4796.82-4350=11.34C- 8.94

446.82=2.4C

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3 years ago

The diagram and data below represent gas and the conditions of pressure, volume, and temperature of the gas in a rigid cylinder

Sedaia [141]

Answer:

2.3 L

Explanation:

when you have this eqaution you use P1V1T2=P2V2T1.

since you are looking for volume of gas cylinder that means you are looking for V2.

so you have your given P= 1.0 atm, V=2.5L, T=298K.

They ask you to use STP or standard pressure and temperature.

STP P= 1atm, STP T=273 K

so you are looking for V2 meaning you are going to get V alone so your new equation is P1*V1*TS/ P2* T1= V2

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682.5/ 298= V

Lastly V= 2.2902 and you round to tenths so now you have

V= 2.3 L

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2 years ago

How many grams are there in 3.4 x 10^24 molecules of NH3

a_sh-v [17]

Answer:

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2 years ago