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3 years ago

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What is amplitude?

2 answers:

NISA [10]3 years ago

6 0

What is amplitude?

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<u>A: amplitude is the height of a wave </u>

B: amplitude is the number of complete waves that pass a point in a second

C: amplitude is the time it takes for one complete waves to a given point

D: amplitude is the distance between two crest or two troughs

Ede4ka [16]3 years ago

4 0

A. The height of a sound wave

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I have 2 questions....but it's multiple choice for 1 of them.

Taya2010 [7]

1. Blood is an organic compound

2. B)

4 0

3 years ago

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Part B When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 22.8 g of carbon were burned in the pres

aksik [14]

<u>Answer:</u> The amount of carbon dioxide gas produced in the reaction is 83.6 grams

<u>Explanation:</u>

As, some amount of oxygen gas is left after the reaction is completed. So, it is present in excess and is considered as an excess reagent.

Thus, carbon is considered as a limiting reagent because it limits the formation of product.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

Given mass of carbon = 22.8 g

Molar mass of carbon = 12 g/mol

Putting values in equation 1, we get:

$\text{Moles of carbon}=\frac{22.8g}{12g/mol}=1.9mol$

The chemical equation for the reaction of carbon and oxygen gas follows:

$C+O_2\rightarrow CO_2$

By Stoichiometry of the reaction:

1 mole of carbon produces 1 mole of carbon dioxide gas

So, 1.9 moles of carbon will produce = $\frac{1}{1}\times 1.9=1.9moles$ of carbon dioxide gas

Now, calculating the mass of carbon dioxide from equation 1, we get:

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = 1.9 moles

Putting values in equation 1, we get:

$1.9mol=\frac{\text{Mass of carbon dioxide}}{44g/mol}\\\\\text{Mass of carbon dioxide}=(1.9mol\times 44g/mol)=83.6g$

Hence, the amount of carbon dioxide gas produced in the reaction is 83.6 grams

6 0

3 years ago

All substances taking part in a certain interaction are shown below: Butane is written followed by an addition sign followed by

OverLord2011 [107]

<span>The Law of Conservation of Mass simply states that the total amount of mass should not change in a chemical reaction that is isolated (no other objects can enter the reaction). The total mass of the reactants must be equal to the total mass of the products. Thus, t</span>he correct estimate of the amount of oxygen used in the interaction is the difference between 133 g and 29 g.

3 0

3 years ago

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Write in the correct coefficients for the balanced equation:<br><br> Na + <br> Cl2 → <br> NaCl

Mkey [24]

Answer:

Na+Cl2-----NaCl

Explanation:

it's the chemical formula of common salt.

7 0

3 years ago

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A chemist dissolves 581.1mg of pure perchloric acid in enough water to make up 150 ml of solution. Calculate the pH of the solut

algol [13]

<u>Answer:</u> The pH of the solution is 1.41

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

Given mass of perchloric acid = 581.1 mg = 0.5811 g (Conversion factor: 1 g = 1000 mg)

Molar mass of perchloric acid = 100.5 g/mol

Volume of solution = 150 mL

Putting values in above equation, we get:

$\text{Molarity of perchloric acid}=\frac{0.5811\times 1000}{100.5\times 150}\\\\\text{Molarity of perchloric acid}=0.0385M$

1 mole of perchloric acid produces 1 mole of $H^+$ ions and 1 mole of $ClO_4^-$ ions

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

$[H^+]=0.0385M$

Putting values in above equation, we get:

$pH=-\log (0.0385)=1.41$

Hence, the pH of the solution is 1.41

6 0

3 years ago