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3 years ago

What does the solid compound, K2SO4, contain?

Chemistry

2 answers:

marin [14]3 years ago

8 0

Answer:

The solid compound contain atoms of potassium , sulfur and oxygen .

Explanation:

A molecule is group of two or more numbers of atoms. These atoms are can be of same types or of different of elements

The name of the given molecule is potassium sulfate.

The molecule of potassium sulfate contains atoms of potassium , sulfur and oxygen.

Number of potassium atom = 2

Number of sulfur atoms = 1

Number of oxygen atoms = 4

Andrew [12]3 years ago

3 0

Potassium and sulfate

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EDTA EDTA is a hexaprotic system with the p K a pKa values: p K a1 = 0.00 pKa1=0.00 , p K a2 = 1.50 pKa2=1.50 , p K a3 = 2.00 pK

mihalych1998 [28]

Answer:

Check the explanation

Explanation:

When,

pH = -log[H+] = 3.30

[H+] = $5.0 X 10^{-4} M$

$Ka1 = 1 ; Ka2 = 0.0316 ; Ka3 = 0.01 ; Ka4 = 0.002 ; Ka5 = 7.4 X 10^{-7} ; Ka6 = 4.3 X 10^{-11}$

$alpha[Y^-4] = [H+]^6 + Ka1[H+]^5 + Ka1Ka2[H+]^4 + Ka1Ka2Ka3[H+]^3 + Ka1Ka2Ka3Ka4[H+]^2 + Ka1Ka2Ka3Ka4Ka5[H+] + Ka1Ka2Ka3Ka4Ka5Ka6$

= $1.56 X 10^{-20} + 3.12 X 10^{-17} + 2 X 10^{-15} + 4 X 10^{-14} + 1.6 X 10^{-13} + 2.34 X 10^{-16} + 2 X 10^{-23}$

= $2.02 X 10^{-13}$

When,

pH = -log[H+] = 10.15

[H+] = $7.08 X 10^{-11} M$

Ka1 = 1 ; Ka2 = 0.0316 ; Ka3 = 0.01 ; Ka4 = 0.002 ; Ka5 = $7.4 X 10^{-7}$ ; Ka6 = $4.3 X 10^-11$

$alpha[Y^{-4}] = [H+]^6 + Ka1[H+]^5 + Ka1Ka2[H+]^4 + Ka1Ka2Ka3[H+]^3 + Ka1Ka2Ka3Ka4[H+]^2 + Ka1Ka2Ka3Ka4Ka5[H+] + Ka1Ka2Ka3Ka4Ka5Ka6$

= $1.26 X 10^{-61} + 1.8 X 10^{-51} + 8.1 X 10^{-43} + 1.12 X 10^{-34} + 3.17 X 10^{-27} + 3.3 X 10^{-23} + 1.83 X 10^{-23}$

= $5.12 X 10^{-23}$

4 0

3 years ago

How many moles of tungsten atoms are in 4.8x10^25 atoms of tungsten?

allsm [11]

Number of moles = number of atoms/Avogadro's number
= (4.8x10^25)/(6.02x10^23)
=79.7 mol (3sf)

7 0

3 years ago

Select the correct answer.

Crazy boy [7]

Answer:

A. Butane

Explanation:

"Butane is a gas above -0.5°C, but when slightly pressurized, forms a liquid. In this form, it is used in cigarette lighters and lighter sticks."

Hope this helps!

4 0

2 years ago

Read 2 more answers

What is the density of air at 75 F and latm pressure? Express in lbm/ft3 and kg/m3

ser-zykov [4K]

Answer : The density of air in $lbm/ft^3$ and $kg/m^3$ is, $0.0743lbm/ft^3$ and $1.19kg/m^3$ respectively.

Explanation :

$PV=nRT\\\\PV=\frac{m}{M}RT\\\\P=\frac{m}{V}\frac{RT}{M}\\\\P=\rho \frac{RT}{M}\\\\\rho=\frac{PM}{RT}$

where,

P = pressure of air = 1 atm

V = volume of air

T = temperature of air = 297 K

The conversion used for the temperature from Fahrenheit to degree Celsius is:

$^oC=(^oF-32)\times \frac{5}{9}$

$^oC=(75-32)\times \frac{5}{9}=24^oC$

The conversion used for the temperature from degree Celsius to Kelvin is:

$K=273+^oC$

$K=273+24=297K$

n = number of moles

m = mass of air

M = average molar mass of air = 28.97 g/mole

$\rho$ = density of air = ?

R = gas constant = 0.0821 L.atm/mol.K

Now put all the given values in the above formula, we get:

$\rho=\frac{PM}{RT}$

$\rho=\frac{(1atm)\times (28.97g/mole)}{(0.0821L.atm/mol.K)\times (297K)}$

$\rho=1.19g/L$

Now we have to calculate density in $lbm/ft^3$ .

Conversion used :

$1g/L=0.0624lbm/ft^3$

So,

$1.19g/L=\frac{1.19g/L}{1g/L}\times 0.0624lbm/ft^3=0.0743lbm/ft^3$

The density of air in $lbm/ft^3$ is, $0.0743lbm/ft^3$

Now we have to calculate density in $kg/m^3$ .

Conversion used :

$1g/L=1kg/m^3$

So,

$1.19g/L=1.19kg/m^3$

The density of air in $kg/m^3$ is, $1.19kg/m^3$

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3 years ago

Considering the current state of our society,do you think science literacy among people has contributed to growth of our economy

MA_775_DIABLO [31]

Answer:

science literacy among people has contributed a lot to the growth and progress of our economy considering the state of our society these days. People who have knowledge in science literacy indeed has contributed a lot of things for the betterment of society. Even though we have an unstable society, these “knowledge” has made its way to the top. In fact, it has contributed a lot of change for the economy. People who have the heart in science literacy must also have the heart in helping others so that their knowledge would also benefit those who are in dire need of support and help. Everything and anything these days are answerable by science and I think it would be great and easy to practice more of it.

Explanation:

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2 years ago