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2 years ago

How does polarity of the solute and solvent affect the solubility of the solute ?

Chemistry

1 answer:

S_A_V [24]2 years ago

4 0

Due to increase in temperature will decreases both solubility and rate of the solute.

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they all have one thing in common and that its all made up of atoms. When these components are active it creates energy

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2 years ago

______ is the genetic DNA makeup of the organism. Example: Hh

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The answer would be A. Genotype

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2 years ago

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What is 140.2 in scientific notation

Akimi4 [234]

Answer:

1.402 * 10^2.

Explanation:

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3 years ago

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An air tight freezer measures 4 mx 5 m x 2.5 m high. With the door open, it fills with 22 °C air at 1 atm pressure.

____ [38]

Answer:

(a) Density of the air = 1.204 kg/m3

(b) Pressure = 93772 Pa or 0.703 mmHg

Explanation:

(a) The density of the air at 22 deg C and 1 atm can be calculated using the Ideal Gas Law:

$\rho_{air}=\frac{P}{R*T}$

First, we change the units of P to Pa and T to deg K:

$P=1 atm * \frac{101,325Pa}{1atm}=101,325 Pa\\\\ T=22+273.15=293.15^{\circ}K$

Then we have

$\rho_{air}=\frac{P}{R*T}=\frac{101325Pa}{287.05 J/(kg*K)*293.15K} =1.204 \frac{kg}{m3}$

(b) To calculate the change in pressure, we use again the Ideal Gas law, expressed in another way:

$PV=nRT\\P/T=nR/V=constant\Rightarrow P_{1}/T_{1}=P_{2}/T_{2}\\\\P_{2}=P_{1}*\frac{T_{2}}{T_{1}}=101325Pa*\frac{7+273.15}{22+273.15}=101,325Pa*0.9254=93,772Pa\\\\P2=93,772 Pa*\frac{1mmHg}{133,322Pa}= 0.703 mmHg$

(c) To calculate the force needed to open we have to multiply the difference of pressure between the inside of the freezer and the outside and the surface of the door. We also take into account that Pa = N/m2.

$F=S_{door}*\Delta P=2m^{2} *(101325Pa - 93772Pa)=2m^{2} *7553N/m2=15106N$

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2 years ago

WHAT IS THE MOLAR MASS FOR AMMONIUM SULFIDE?<br> A. 59.1g/mol<br> B.82.2g/mol<br> C.50.1g/mol

Jobisdone [24]

Answer:

68g/mol

Explanation:

The formula of ammonium sulfide is:

Ammonium sulfide = (NH₄)₂S

The molar mass of a compound is the mass in gram of one mole of the substance. In a compound, it is expressed gram formula mass or gram-molecular weight.

It is determined by the addition of the component atomic masses and then expressed in grams;

Atomic mass of N = 14, H = 1 and S = 32

(NH₄)₂S = 2[14 + 4(1)] + 32 = 36 + 32 = 68g/mol

3 0

2 years ago