Chemistry: Baseball player throws a baseball ball travels 35 m in five seconds what is the average speed of the ball

Baseball player throws a baseball ball travels 35

Branci5125

04.01.2022

$\boxed{\text{7 m/s}}$

Explanation:

The formula for average speed is

$\text{speed} = \dfrac{\text{distance}}{\text{time}}\\\\s = \dfrac{d}{t}$

Data:

d = 35 m

t = 5 s

Calculation:

$s = \dfrac{\text{35 m}}{\text{5 s}} = \text{7 m/s}$

The average speed of the ball is $\boxed{\textbf{7 m/s}}$

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judyewert

20.11.2022

6.6 g

Explanation:

La ecuación de la reacción es;

MnO2 + 4 HCl > MnCl2 + Cl2 + 2H2O

Número de moles de HCl que reaccionan = 7.5g / 36.5 g / mol = 0.21 moles

Dado que;

4 moles de HCl producen 1 mol de MnCl2

0,21 moles de HCl producen 0,21 * 1/4 = 0,0525 moles de MnCl2.

Masa de MnCl2 = 125,844 g / mol * 0,0525 moles = 6.6 g

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