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const2013 [10]
3 years ago
6

Step 1: Pick your favorite physical activity This can be almost anything! Try to pick an activity that you like to participate i

n, but you can pick anything you want. It could be hockey, tennis, wakeboarding, dancing, rock climbing, or even walking your dog! Almost ANY activity will work for this assignment. Step 2: Research the activity Get on the internet and learn about the activity you selected. Step 3: Write a brief report - 2 full paragraphs Be sure to include the following information in your report: - What activity you selected and why you selected it. - 2 health benefits of your activity. - 3 different muscles that your activity uses or "works out." - If participating in your activity presents any safety concerns. When you have finished your 2 full paragraphs, submit your assignment here!
Chemistry
1 answer:
lana66690 [7]3 years ago
8 0

Dancing is a physical activity which strengthens the abdominal and calf muscles as well as improves flexibility.

<h3>What is a physical activity?</h3>

A physical activity is any activity which involves movement of the body in order to strengthen the muscles and to be physically fit.

Dancing is a physical activity which involves intricate and repeated movements of the body.

Dancing is beneficial because;

  • it helps to relieve stress
  • it improves flexibility
  • it builds muscle endurance

Some muscles involved in dancing include;

  • The abdominal muscles
  • The quadriceps
  • the glutes

Some risks in dancing include muscle injuries, dislocations and possibly fractures due to falls.

Therefore, a dancing routine strengthens the abdominal and calf muscles as well as improves flexibility.

Learn more about dancing at: brainly.com/question/19025917

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How many milliliters of 0.500 M NaOH should be added to 10.0 g of tris hydrochloride (FM 121.135) to give a pH of 7.60 in a fina
liubo4ka [24]

Answer:

41.64mL of NaOH 0.500M must be added to obtain the desire pH

Explanation:

It is possible to find pH of a buffer by using H-H equation, thus:

pH = pka + log [A⁻] / [HA]

<em>Where [HA] is concentration of the weak acid TRIS-HCl and [A⁻] is concentration of its conjugate acid.</em>

Replacing in H-H equation:

7.60 = 8.072 + log [A⁻] / [HA]

0.3373 =  [A⁻] / [HA] <em>(1)</em>

10.0g of TRIS-HCl (Molar mass: 121.135g/mol) are:

10.0g ₓ (1mol / 121.135g) = 0.08255 moles of acid. That means moles of both the acid and conjugate base are:

[A⁻] + [HA] = 0.08255 <em>(2)</em>

Replacing (1) in (2):

0.3373 =  0.08255 - [HA] / [HA]

0.3373[HA] =  0.08255 - [HA]

1.3373[HA] = 0.08255

<em>[HA] = 0.06173 moles</em>

Thus:

[A⁻]  = 0.08255 - 0.06173 = 0.02082 moles [A⁻]

The moles of A⁻ comes from the reaction of the weak acid with NaOH, that is:

HA + NaOH → A⁻ + H₂O + K⁺

Thus, <em>you need to add 0.02082 moles of NaOH to produce 0.02082 moles of A⁻. </em>As NaOH solution is 0.500M:

0.02082 moles NaOH ₓ (1L / 0.500mol) = 0.04164L of NaOH 0.500M =

<h3>41.64mL of NaOH 0.500M must be added to obtain the desire pH</h3>

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