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Sergeeva-Olga [200]

3 years ago

5

An aqueous solution of potassium sulfate is allowed to react with an aqueous solution of calcium nitrate. identify the solid in

the balanced equation.

1 answer:

Maksim231197 [3]3 years ago

6 0

Ans: Calcium sulfate.

K2SO4 (aq) + Ca(NO3)2 (aq) ⇒ 2KNO3 (aq) + CaSO4 (s)

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Which statement describes solstices?

vodka [1.7K]

I believe it is the very first one

hope it helps :)

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If 25.8 grams of BaO dissolve in enough water to make a 212 gram solution, what is the percent by mass of the solution?

Scorpion4ik [409]

Mass of solute = 25.8 g

mass solution = 212 g

% =( mass of solute / mass solution ) x 100

% = ( 25.8 / 212 ) x 100

% = 0.122 x 100

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Answer:

Safety goggles and chemical fume hoods

Explanation:

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NARA [144]

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How much faster does ethane (C2H6) gas travel compared to chlorine gas?

zimovet [89]

Answer:

$\large \boxed{\text{54 $\, \%$ faster }}$

Explanation:

$v_{\text{rms}} \propto \sqrt{\dfrac{3RT}{M}$

if temperature is constant.

$v_{\text{rms}} \propto \sqrt{\dfrac{1}{M}$

if we are comparing two gases,

$\dfrac{v_{2}}{v_{1}} = \sqrt{\dfrac{M_{1}}{M_{2}}}$

Let chlorine be Gas 1 and ethane be Gas 2

Data:

M₁ = 70.91 g/mol

M₂ = 30.07 g/mol

Calculation

$\begin{array}{rcl}\dfrac{v_{2}}{v_{1}} & = & \sqrt{\dfrac{M_{1}}{M_{2}}}\\\\& = & \sqrt{\dfrac{70.91}{30.07}}\\\\& = & \sqrt{2.358}\\\\& = & \mathbf{1.54}\\\end{array}\\\text{Ethane molecules travel at 1.54 times the speed of chlorine molecules}\\\text{or $\large \boxed{\textbf{54 $\%$ faster }}$ than chlorine molecules}$

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3 years ago