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3 years ago

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One person pulls on a rope with a force of 400 N to the right. Another person pulls on the opposite end with a force of 600 N to

the left. What is the net force?

1 answer:

Aleksandr-060686 [28]3 years ago

5 0

Answer:

The net force is 200 i think

Explanation:

600-400=200

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ratelena [41]

Ok what do u need help with

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3 years ago

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Calculate the work, w, gained or lost by the system when a gas expands from 15 L to 45 L against a constant external pressure of

marta [7]

Answer:

Work done by the system = 4545 J

Explanation:

The expression for the calculation of work done is shown below as:

$w=-P\times \Delta V$

Where, P is the pressure

$\Delta V$ is the change in volume

From the question,

$\Delta V$ = 45 - 15 L = 30 L

P = 1.5 atm

$w=-1.5\times 30\ atmL$

Also, 1 atmL = 101 J

So,

$w=-1.0\times0.75\times 101\ J=-4545\ J$ (negative sign implies work is done by the system)

<u>Work done by the system = 4545 J</u>

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3 years ago

If only 0.186 g of Ca(OH)2 dissolves in enough water to give 0.230 L of aqueous solution at a given temperature, what is the Ksp

Lilit [14]

Answer:

$Ksp=5.20x10^{-6}$

Explanation:

Hello there!

In this case, according to the solubility equilibrium of calcium hydroxide:

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

Whereas the equilibrium expression is:

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

It is firstly necessary to calculate the molar solubility given the grams and volume of the dissolved solute:

$s=\frac{0.186g/(74.09g/mol)}{0.230L}=0.0109M$

Now, according to the Ksp expression, we plug in s as the solubility to obtain:

$Ksp=(s)(2s)^2\\\\Ksp=(0.109)(2*0.0109)^2\\\\Ksp=5.20x10^{-6}$

Regards!

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3 years ago

If substance A has a density of 2.3 g/mL and water has a density of 1.00 g/mL will substance A float or sink in water? Explain i

UkoKoshka [18]

Substance A will sink because it is more dense than water. An object that is more dense than water will sink and an object that is less dense than water will float.

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3 years ago

What type of reaction is BaCl2 + Na2SO4 → 2NaCl + BaSO4?

maria [59]

Answer:

Double Displacement reaction

Explanation:

BaCl2 + Na2SO4 → 2NaCl + BaSO4

Double displacement reaction occurs when the cations and anions of the two reacting compound interchange, forming a new products. From the equation given above, Na^+ switch place with Ba^2 + and likewise Cl^- with (SO4) ^2- to form NaCl and BaSO4.

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3 years ago