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miv72 [106K]
3 years ago
5

Sam wants to conduct an investigation of the velocity of a golf ball when hit off of the tee using the scientific method. Review

the procedural steps that Sam plans to follow during his investigation.
Collect data from a sample of ten golf balls hit off of the same tee by the same golfer.

Hypothesize that the golf ball will reach a velocity of 5 feet per second each time the ball is hit from the tee by the same golfer.

Observe the golf ball as it is hit off of the tee.

Analyze data using a table of data and graph of the data.

Communicate results based on the sample data collected.



Which of the following options represents the order of Sam’s procedural steps according to the scientific method?

Sam should plan to hypothesize about the velocity of the golf ball, observe the golf ball, collect data from a sample of golf balls, communicate the results based on collected data, and analyze the data.

Sam’s plan of procedural steps is correct.

Sam should plan to observe the golf ball, hypothesize about the velocity of the golf ball, collect data from a sample of golf balls, analyze the data, and communicate the results based on collected data.

Sam should plan to observe the golf ball, collect data from a sample of golf balls, analyze the data, hypothesize the golf ball’s velocity, and communicate the results based on collected data.
Chemistry
2 answers:
Morgarella [4.7K]3 years ago
8 0
Sam is correct is correct
Nookie1986 [14]3 years ago
3 0

Answer:

Sam’s plan of procedural steps is correct.

Explanation:

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Suppose a 0.025M aqueous solution of sulfuric acid (H2SO4) is prepared. Calculate the equilibrium molarity of SO4−2. You'll find
FromTheMoon [43]

<u>Answer:</u> The concentration of SO_4^{2-} at equilibrium is 0.00608 M

<u>Explanation:</u>

As, sulfuric acid is a strong acid. So, its first dissociation will easily be done as the first dissociation constant is higher than the second dissociation constant.

In the second dissociation, the ions will remain in equilibrium.

We are given:

Concentration of sulfuric acid = 0.025 M

Equation for the first dissociation of sulfuric acid:

       H_2SO_4(aq.)\rightarrow H^+(aq.)+HSO_4^-(aq.)

            0.025          0.025       0.025

Equation for the second dissociation of sulfuric acid:

                    HSO_4^-(aq.)\rightarrow H^+(aq.)+SO_4^{2-}(aq.)

<u>Initial:</u>            0.025            0.025      

<u>At eqllm:</u>      0.025-x          0.025+x        x

The expression of second equilibrium constant equation follows:

Ka_2=\frac{[H^+][SO_4^{2-}]}{[HSO_4^-]}

We know that:

Ka_2\text{ for }H_2SO_4=0.01

Putting values in above equation, we get:

0.01=\frac{(0.025+x)\times x}{(0.025-x)}\\\\x=-0.0411,0.00608

Neglecting the negative value of 'x', because concentration cannot be negative.

So, equilibrium concentration of sulfate ion = x = 0.00608 M

Hence, the concentration of SO_4^{2-} at equilibrium is 0.00608 M

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Answer:

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Explanation:

Chemical reaction

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