All categories

3 years ago

Which of the following is the correct measurement for the volume of liquid shown below?

Chemistry

1 answer:

mr Goodwill [35]3 years ago

5 0

Answer:

A. 3.5ml

Explanation:

lowest point of liquid or meniscus

You might be interested in

A solution of HCOOH has 0.16M HCOOH at equilibrium. The Ka for HCOOH is 1.8×10−4. What is the pH of this solution at equilibrium

kotykmax [81]

Answer:

$pH=2.28$

Explanation:

Hello,

In this case, for the acid dissociation of formic acid (HCOOH) we have:

$HCOOH(aq)\rightarrow H^+(aq)+HCOO^-(aq)$

Whose equilibrium expression is:

$Ka=\frac{[H^+][HCOO^-]}{[HCOOH]}$

That in terms of the reaction extent is:

$1.8x10^{-4}=\frac{x*x}{0.16-x}$

Thus, solving for $x$ which is also equal to the concentration of hydrogen ions we obtain:

$x=0.00528M$

$[H^+]=0.00528M$

Then, as the pH is computed as:

$pH=-log([H^+])$

The pH turns out:

$pH=-log(0.00528M)\\\\pH=2.28$

Regards.

7 0

4 years ago

1.Peptide bond formation is accomplished as the amine nitrogen of the an-tRNA in the ____ carries out a _____ of the amino acid

Levart [38]

Answer:

Explanation:

A site, nucleophilic attack on the carbonyl carbon, tRNA of the P site

5 0

3 years ago

Need help !!!!! ASAP

Oksi-84 [34.3K]

<h2>Hello!</h2>

The answer is:

The approximate volume is 9.84 L.

$V=9.84L$

Since we are given the numer of moles, the temperature and the pressure of the gas, we can calculate the approximate volume using The Ideal Gas Law.

The Ideal Gas Law is based on Boyle's Law, Gay-Lussac's Law, Charles's Law, and Avogadro's Law, and it's described by the following equation:

$PV=nRT$

Where,

P is the pressure of the gas.

V is the volume of the gas.

n is the number of moles of the gas.

T is the absolute temperature of the gas (Kelvin).

R is the ideal gas constant, which is equal to:

$R=0.082\frac{atm.L}{mol.K}$

So, we are given the information:

$n=1.5mol\\Temperature=300K\\Pressure=3.75atm$

Now, substituting the given information and isolating the Volume from The Ideal Gas Law equation, we have:

$PV=nRT$

$V=\frac{nRT}{P}$

$3.75atm*V=1.5mol*0.082*\frac{atm.L}{mol.K}*300K$

$V=\frac{ 1.5mol*0.082*\frac{atm.L}{mol.K}*300K}{3.75atm}\\\\V=\frac{36.9atm.L}{3.75atm}=9.84L$

So, the approximate volume is 9.84 L.

$V=9.84L$

Have a nice day!

7 0

4 years ago

The percent by mass of iron(III) 1 Fe2S3<br> is _____%

stealth61 [152]

Answer:

percent=69.94%

6 0

3 years ago

Pleasee helpppp

Gekata [30.6K]

Answer:

its 1 transferd electrons 2 shared electrons 3 metal only

Explanation:

3 0

3 years ago

Read 2 more answers