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allochka39001 [22]
4 years ago
15

A cart accelerates at 2m/s2 when a force of 60 N is applied. What is the mass of the cart? Formula: F=ma

Chemistry
1 answer:
Fudgin [204]4 years ago
8 0

Answer:

Mass, m = 30 kg

Explanation:

We have,

Acceleration of a cart, a=2\ m/s^2

Force applied, is 60 N

It is required to find the mass of the cart.

The formula of the force acting on the cart is :

F=ma

m is mass of the cart

m=\dfrac{F}{a}\\\\m=\dfrac{60\ N}{2\ m/s^2}\\\\m=30\ kg

So, the mass of the cart is 30 kg.  

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t 745 K, the reaction below has an equilibrium constant (Kc) of 5.00 × 102. H2 (g) + I2 (g) ⇌ 2 HI (g) If a mixture of 0.10 mol
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Explanation :

The given chemical reaction is:

                        H_2(g)+I_2(g)\rightarrow 2HI(g)

Initial conc.    0.10        0.10      0.50

At eqm.        (0.10-x)  (0.10-x)   (0.50+2x)

As we are given:

K_c=5.00\times 10^2

The expression for equilibrium constant is:

K_c=\frac{[HI]^2}{[H_2][I_2]}

Now put all the given values in this expression, we get:

5.00\times 10^2=\frac{(0.50+2x)^2}{(0.10-x)\times (0.10-x)}

x = 0.0713  and x = 0.134

We are neglecting value of x = 0.134 because the equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.0713

The concentration of HI (g) at equilibrium = (0.50+2x) = [0.50+2(0.0713)] = 0.643 M

Thus, the concentration of HI (g) at equilibrium is, 0.643 M

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