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weqwewe [10]
3 years ago
14

Why do (or can) your muscles hurt after a good workout

Chemistry
1 answer:
Anna71 [15]3 years ago
8 0

Answer:

option C.there is an accumulation of carbon dioxide.

Explanation:

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Which value is most likely to be the pH of a salt that is formed by the reaction of a weak acid and a strong base?
murzikaleks [220]

Answer:

8.7

Explanation:

A weak acid and a strong base will form a more basic salt.

2.0 is more acidic, you'll usually see this from a reaction between a strong acid and a weak base.

6.8 and 7.0 are neutral (or close to neutral) and are formed from reactions between weak acids and weak bases, or strong acids and strong bases.

6 0
3 years ago
Read 2 more answers
When 5.467 grams of compound z are burned in excess oxygen, 15.02 grams of co2 and 2.458 grams of h2o are produced. determine it
Vera_Pavlovna [14]

Given the mass of CO2 =15.02 g

Moles of CO_{2}=15.02 gCO_{2} *\frac{1 molCO_{2} }{44.01 gCO_{2} } =0.341 mol CO_{2}

Mass of H2O = 2.458 g

Moles of H_{2}O=2.458 g H_{2}O*\frac{1molH_{2}O }{18.02g H_{2}O } =0.136molH_{2}O

Moles of C = 0.341 mol CO_{2}*\frac{1 molC}{1 molCO_{2} }  =0.341molC

Moles of H = 0.136 mol H_{2}O * \frac{2 mol H}{1 mol H_{2}O } =0.272 mol H

Mass of C in the sample = 0.341 mol C*\frac{12.01g C}{1 mol C} =  4.095 g C

Mass of H = 0.272 mol H *\frac{1.01 g H}{1 molH}=0.275 gH

Mass of O in the sample = 5.467 g - (4.095 g +0.275 g) = 1.097 g O

Moles of O = 1.097 g O * \frac{1 molO}{16 g O} =0.0686 mol O

Simplest mole ratios of the elements in the compound:

Cx_{\frac{0.341mol}{0.0686mol}} H_{\frac{0.272mol}{0.0686mol} }O_{\frac{0.0686mol}{0.0686mol} }

Therefore the empirical formula of the compound is C_{5}H_{4}O

7 0
3 years ago
5. What type of clouds can be found in the mesosphere?
Masja [62]

Some material from meteors lingers in the mesosphere, causing this layer to have a relatively high concentration of iron and other metal atoms. Very strange, high altitude clouds called "noctilucent clouds" or "polar mesospheric clouds" sometime form in the mesosphere near the poles.

I really hope this helps! I wish you the best of luck!

8 0
3 years ago
What is the pOH of a solution that has an H+=7.7x10^-7 M
pentagon [3]

Answer:

Explanation:

Step 1

The question is based on the concept of PH and pOH calculations.

pH is defined as negative logarithmic of hydronium Ion concentration.

while pOH is defined as negative logarithmic of hydroxide ion concentration of the solution.

Step 2

[H+] = 7.7*10-7  M  

pH = -log[H+]  

    = -log ( 7.7*10-7 )

     = 6.12

Step 3

pOH = 14 - pH

   = 14 - 6.11

  = 7.89

4 0
3 years ago
List the objects from the smallest to the largest mass.
ddd [48]

i need help ls i thank its book 500 grams

3 0
3 years ago
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