) In the calibration step of a thermochemistry experiment, a current of 117 mA, from a 24.0 V source was allowed to flow through
1 answer:
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Answer:
The initial velocity is 38.46 m/s.
Explanation:
The horizontal distance travel by the tennis ball = 13 m
The height at which the tennis ball dropped = 56 cm
Now calculate the initial speed of tennis ball.
The vertical velocity is zero.
Below is the calculation. Here, first convert centimetre into kilometre. So, height at which ball dropped is 0.56 km.
<u>Answer:</u> The number of electrons in given amount of silver are
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
We are given:
Given mass of silver = 7.1 g
Molar mass of silver = 107.87 g/mol
Putting values in above equation, we get:
Number of electrons in 1 atom of silver = 47
According to mole concept:
1 mole of an element contains number of particles
So, 0.066 moles of silver will contain = - number of electrons
Hence, the number of electrons in given amount of silver are