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irina1246 [14]
2 years ago
14

Please help me out i'm new here but i really need help for science (if you need help with any hw like ela i can help!) (50 point

s) ima give more out in my other questions this is the 2 question make sure go to the first one!
Question 6 Slide 8 Pg 153 (image 1)
Is it...?? Choose one (check the image to see the questions and question answers)
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Question 7 Slide 8 Pg 153 * (image 1)
Is it...?? Choose one (check the image to see the questions and question answers)
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Question 8 Slide 8 Pg 153 * (image 1)
State the independent variable in this investigation?

Question 18 Slide 11 Pg 158 (image 2)

Is it...?? Choose one (check the image to see the questions and question answers)
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2.
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Question 19 Slide 11 Pg 158 (image 2)
Is it...?? Choose one (check the image to see the questions and question answers)
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Question 20 Slide 11 Pg 158 (image 2)

Is it...?? Choose one (check the image to see the questions and question answers)
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Chemistry
1 answer:
andrezito [222]2 years ago
6 0
Q6. 3
Q7. 3
Q8. pH
Q18. 3
Q19. 3
Q20. 4
Hope this helped??
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The tendency of an element to react is closely related to
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C. The number of Valence electrons,
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Hope it helps :)

8 0
3 years ago
PLSS HELP ASAP it's due
BartSMP [9]
<h3>Answer:</h3>

87.02%

<h3>Explanation:</h3>

Percent yield of a product in a chemical equation is the ratio of actual or experimental yield to theoretical yield expressed as percentage.

In this case we are given;

Mass of Zinc as 7.23 g

Actual volume of Hydrogen gas produced as 2.16 L

We are required to calculate the percentage yield of Hydrogen gas;

<h3>Step 1: Write a balanced equation for the reaction</h3>

The balanced equation for the reaction between Zinc metal and Hydrochloric acid is given by;

Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)

<h3 /><h3>Step 2: Moles of Zinc metal that reacted </h3>

Moles are given by dividing mass with molar mass

Moles = Mass ÷ Molar mass

Molar mass of Zinc = 65.38 g/mol

Therefore;

Number of moles = 7.23 g ÷ 65.38 g/mol

                             = 0.1106 moles

<h3>Step 3: Calculate the number of moles of Hydrogen gas produced</h3>

From the equation 1 mole of Zinc results in the formation of 1 mole of Hydrogen gas.

Therefore, Moles of hydrogen gas = Moles of Zinc × 1

                                                         = 0.1106 moles × 1

                                                         = 0.1106 moles

<h3>Step 4: Calculate the theoretical volume of Hydrogen gas produced.</h3>

At STP, 1 mole of a gas occupies 22.4 Liters

Therefore;

Volume of Hydrogen = Number of moles × 22.4 L

                                   = 0.1106 mole × 22.4 L

                                  = 2.477 L

<h3>Step 5: Calculate the percent yield </h3>

Percent yield = (Actual yield ÷ Theoretical Yield) × 100%

                      = (2.16 L ÷ 2.477 L)× 100%

                     = 87.20%

Thus, the percent yield of hydrogen gas produced is 87.02%

8 0
3 years ago
H20 100+free XP for your account enjoy guys algebros
SSSSS [86.1K]

Answer:

thank u so much for your free poi nts........... and

thank u so much for your generosity....

3 0
2 years ago
Read 2 more answers
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