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4 years ago

What is the correct name of the compound HgS

Chemistry

1 answer:

mr_godi [17]4 years ago

7 0

The answer is Mercury sulfide, it is composed of the elements mercury and sulfur.

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Osmosis is the process responsible for carrying nutrients and water from groundwater supplies to the upper parts of trees. The o

liberstina [14]

Answer: Molar concentration of the tree sap have to be 0.783 M

Explanation:

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iCRT$

where,

$\pi$ = osmotic pressure of the solution = 19.6 atm

i = Van't hoff factor = 1 (for non-electrolytes)

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $32^oC=[273+32]=305K$

Putting values in above equation, we get:

$19.6atm=1\times C\times 0.0821\text{ L.atm }mol^{-1}K^{-1}\times 305K$

$C=0.783M$

Thus the molar concentration of the tree sap have to be 0.783 M to achieve this pressure on a day when the temperature is 32°C

4 0

3 years ago

A sample of n2 occupies 3. 0l at 3. 0atm. What volume will it occupy when the pressure is changed to 0. 5atm and the temperature

belka [17]

It will occupy 18 L volume when the pressure is changed to 0. 5 atm and the temperature remain constant.

Calculation,

According to Boyle law, the pressure of a given quantity of gas varies inversely with its volume at constant temperature.

$P_{1} V _{1} = k$ .....(i)

$P_{1}$ is initial pressure = 3 atm
$V _{1}$ is initial volume = 3L
k is constant

$P_{2} V _{2} = k$ (ii)

$P_{2}$ is final pressure = ?
$V _{2}$ is final volume = 0.5atm
k is constant

Combining equation (i) and (ii). we get,

$P_{1} V _{1} = P_{2} V _{2}$

3 atm× 3L= $V _{2}$ × 0.5atm

$V _{2}$ = 3 atm× 3L/0.5atm = 18 L

Boyle law used during respiration or breathing.

To Learn more about Boyle law

brainly.com/question/1437490

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7 0

2 years ago

If 97.3 L of NO2 forms measured at 35 C and 632 mm Hg. What is the percent yield?

enyata [817]

<span>a. Use PV = nRT and solve for n = number of mols O2.
mols NO = grams/molar mass = ?

Using the coefficients in the balanced equation, convert mols O2 to mols NO2. Do the same for mols NO to mols NO2. It is likely that the two values will not be the same which means one is wrong; the correct value in LR (limiting reagent) problems is ALWAYS the smaller value and the reagent producing that value is the LR.

b.
Using the smaller value for mols NO2 from part a, substitute for n in PV = nRT, use the conditions listed in part b, and solve for V in liters. This will give you the theoretical yield (YY)in liters. The actual yield at these same conditions (AY) is 84.8 L.

</span>and % will be 60%.

3 0

3 years ago

Compared with gases, liquids: A. have stronger intermolecular attractions. B. have more space between their particles. C. are mu

Fiesta28 [93]

A. have stronger intermolecular attractions.

6 0

3 years ago

25. To separate benzene from water, a 850 g aqueous solution of benzene is cooled from

Sonja [21]

Answer:

132.94 kilo joules

Explanation:

We are given;

Mass of benzene solution is 850 g
Temperature change from 95°C to 3° C = 92° C or 92 K

We are required to determine the energy released by the cooling of benzene.

Taking the specific heat capacity of liquid benzene as 1.7 kJ/kg/K

Then we can determine the amount of heat energy released by using the formula;

Heat = Mass × specific heat × change in temperature

= 0.85 kg × 1.7 kJ/kg/K × 92 K

= 132.94 kilo joules

Therefore, the heat released by cooling benzene is 132.94 kilo joules

6 0

3 years ago