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3 years ago

8

What are the best titles a and b A science b pseudoscience

1 answer:

Mars2501 [29]3 years ago

8 0

i don't really know what you are trying to say here, but what i think you are saying is what sounds like a more impressive job?? in my opinion, pseudoscience sounds more fancy and interesting. Since not a lot of people really knows what that is, it sparks conversation.

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What is the difference between fluorine compounds and fluorine minerals ?

Ratling [72]

Fluorine<span> is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. </span>

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4 years ago

4 FeS2+ 11 O2 → 2 Fe2O3+ 8SO2

lana66690 [7]

Answer:

75g of FeS2 will produce 80.1g of SO2.

Explanation:

4FeS2 + 11O2 -------> 2Fe2O3 + 8SO2

Step 1: obtain the number of mole to produce the gas SO2

4 moles of FeS2 produces 8 moles of SO2

1 mole of FeS2 will produce 2 moles of SO2

Step 2:

Find the relative molecular mass (RMM) of FeS2 and SO2

(Fe= 55.8, S = 32)

RMM of FeS2= 119.8g/mol

RMM of SO2 = 64g/mol

Step 3:

Equate the RMM into the mole equation

1mole of FeS2 = 2 moles of SO2

119.8g/mol = 64*2= 128g/mol of SO2

75g will produce ( 128 * 75 / 119.8)

= 80.1g

So therefore, 75g of FeS2 will produce 80.1g of SO2.

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4 years ago

What is the wavelength of an X-ray having a frequency of 4.80 x 1017 Hz

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Answer:

Refer to the attachment

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3 years ago

You titrate 5.0 mL of HCl with 0.010 M NaOH. You find the end point of your titration occurs when 12.0 mL of NaOH has been added

leonid [27]

Answer:

The total volume of the solution at the end point of the titration is 17.0 mL

Explanation:

First we will write a balanced chemical equation for the reaction between HCl and NaOH.

HCl + NaOH → NaCl + H₂O

This means 1 mole of HCl will react with 1 mole of NaOH to give 1 mole of NaCl and 1 mole of H₂O

From the question,

Concentration of acid (HCl), $C_{A}$ = ??

Volume of acid (HCl), $V_{A}$ = 5.0 mL

Concentration pf base (NaOH), $C_{B}$ = 0.010 M

Volume of base (NaOH), $V_{B}$ = 12.0 mL

To determine the Concentration of acid, $C_{A}$

From,

$\frac{C_{A}V_{A} }{C_{B}V_{B} } = \frac{n_{A} }{n_{B} }$

Where $n_{A}$ is the mole ratio of acid

and $n_{B}$ is the mole ratio of base.

The concentration of the acid used can be determined from the above formula.

But, we are asked to find the total volume of the solution at the end point of the titration

The total volume of the solution will be the sum of the volume of HCl that reacted and volume of NaOH that reacted.

Hence, The total volume of the solution = $V_{A} + V_{B}$

= 5.0 mL + 12.0 mL

= 17.0 mL

Hence, the total volume of the solution at the end point of the titration is 17.0 mL

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3 years ago

Yellow light has a frequency of 5.2 × 1014 Hz and travels at a speed of 3.0 × 108 m/s. What is the wavelength of yellow light, i

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Answer:

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3 years ago