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3 years ago

The element chlorine has two naturally occurring isotopes. About 75% of chlorine isotopes are Cl-35 and about 25% are Cl-37.

Physics

2 answers:

Mila [183]3 years ago

8 0

ur answer i would beileve is a

Salsk061 [2.6K]3 years ago

7 0

Answer:

A) 35.45 amu

Explanation:

Average molar mass is given as

$M_{avg} = \frac{n_1M_1 + n_2M_2}{n_1 + n_2}$

here we know that

$n_1 = 0.75$

$M_1 = 35$

$n_2 = 0.25$

$M_2 = 37$

now we have

$M_{avg} = \frac{0.75(35) + 0.25(37)}{0.75 + 0.25}$

$M_{avg} = 35.5$

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3 years ago

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3 years ago

In a game of angry birds you launch a bird with an angle of 53 degrees to horizontal. Unfortunatly, its not a good shot and the

Alisiya [41]

Answer:

The maximum height covered is 3.25 m.

The horizontal distance covered is 9.81 m.

The total time in the air is 1.63 seconds.

Explanation:

The launch speed, $u_0= 10 m/s$ .

Angle of launch with the horizontal, $\theta = 53 ^{\circ}$

So, the vertical component of the initial velocity,

$u_0\sin\theta=10 \sin 53 ^{\circ}\cdots(i)$ .

The horizontal component of the initial velocity,

$u_0\cos\theta=10 \cos 53 ^{\circ}$

Let, t be the time of flight, to the horizontal distance covered

$D=10 \cos (53 ^{\circ})t\cdots(ii)$ .

Not, applying the equation of motion in the vertical direction.

$s= ut +\frac 1 2 at^2$

Where s is the displacement in time t, u is the initial velocity and a is the acceleration.

In this case, $u =10 \sin 53 ^{\circ}$ (from equation (i), s=0 (as the final height is same as the launch height) and $a = -9.81 m/s^2$ (negative sign is due to the downward direction).