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3 years ago

Friction is generated when _____ interfere with each other on sliding surfaces. solids molecules forces fluids

Chemistry

1 answer:

9966 [12]3 years ago

5 0

Friction is generated when sliding

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Excess Ca(OH)2 is shaken with water to produce a saturated solution. The solution is filtered, and a 50.00 mL sample titrated wi

julia-pushkina [17]

Answer: The $K_{sp}$ for calcium hydroxide is $5.324\times 10^{-6}$

Explanation:

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is $HCl$

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $Ca(OH)_2$

We are given:

$n_1=1\\M_1=0.0983M\\V_1=11.22mL\\n_2=2\\M_2=?M\\V_2=50mL$

Putting values in above equation, we get:

$1\times 0.0983\times 11.22=2\times M_2\times 50\\\\M_2=0.011M$

The concentration of $Ca(OH)_2$ comes out to be 0.011 M.

The balanced equilibrium reaction for the ionization of calcium hydroxide follows:

$Ca(OH)_2\rightleftharpoons Ca^{2+}+2OH^-$

The expression for solubility constant for this reaction follows:

$K_{sp}=[Ca^{2+}][OH^-]^2$

Putting the values in above equation, we get:

$K_{sp}=(0.011)\times (2\times 0.11)^2$

$K_{sp}=5.324\times 10^{-6}$

Hence, the $K_{sp}$ for calcium hydroxide is $5.324\times 10^{-6}$

6 0

3 years ago

Read 2 more answers

A photon has a wavelength of 6.2 meters. Calculate the energy of the photon in joules. (Planck's constant is 6.626 × 10-34 joule

Juli2301 [7.4K]

Wavelength = (planck’s constant) (speed of light) / Energy

6.2 (Energy) = (6.63 •10^-34) (3•10^8)

1.989•10^-25 / 6.2 =

3.2081 • 10^-26 is the answer

4 0

4 years ago

Read 2 more answers

Please help me answer this first question.

Strike441 [17]

Answer:

I think it would be 9 moles.

4 0

3 years ago

In what phase is the moon if it is gaining light and less than half illuminated

Nat2105 [25]

Answer: Crescent

Explanation: Image result for In what phase is the moon if it is gaining light and less than half illuminated

Crescent Moons are when it's less than half illuminated, and gibbous when it's more than half. “Waxing” means that the Moon becomes more illuminated night-by-night, and the term “waning” means that it's getting less illuminated each night.

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3 years ago

What mass of sulfur has to burn to produce 4.5l so2 at 300°c and 101kpa s(s) o2( g. so2( g.?

Mandarinka [93]

S + O2 --> So2. P = 101kPa = 1atm. R = 0.082 atm - L - (mol-K)^-1. Applying ideal gas equation PV = nRT. n = 1x4.5/0.082x573 = 0.096mole. According to stoichiometry, moles of S = moles of SO2 = 0.096mol. Mass of S = moles of So2 x molar Wt = 0.095x32 = 3.04moles. Hope it helps

8 0

3 years ago