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3 years ago

What does the poitof incidence mean?

Chemistry

1 answer:

Lemur [1.5K]3 years ago

4 0

Answer:

Point of incidence: The point on the surface where the incident ray strikes the surface is called the point of incidence. Reflected ray: The ray of light that bounces back from the surface of an object is called a reflected ray of light.

Explanation:

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Which of the following is NOT a characteristic of metals?

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3 years ago

Read the following chemical equation.

Anton [14]

Answer:

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Explanation:

According to oxidation and reduction

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3 years ago

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In a titration, 4.7 g of an acid (HX) requires 32.6 mL of 0.54 M NaOH(aq) for complete reaction. What is the molar mass of the a

katrin2010 [14]

Answer : The molar mass of an acid is 266.985 g/mole

Explanation : Given,

Mass of an acid (HX) = 4.7 g

Volume of NaOH = 32.6 ml = 0.0326 L

Molarity of NaOH = 0.54 M = 0.54 mole/L

First we have to calculate the moles of NaOH.

$\text{Moles of }NaOH=\text{Molarity of }NaOH\times \text{Volume of solution}=0.54mole/L\times 0.0326L=0.017604mole$

Now we have to calculate the moles of an acid.

In the titration, the moles of an acid will be equal to the moles of NaOH.

Moles of an acid = Moles of NaOH = 0.017604 mole

Now we have to calculate the molar mass of and acid.

$\text{Moles of an acid}=\frac{\text{Mass of an acid}}{\text{Molar mass of an acid}}$

Now put all the given values in this formula, we get:

$0.017604mole=\frac{4.7g}{\text{Molar mass of an acid}}$

$\text{Molar mass of an acid}=266.985g/mole$

Therefore, the molar mass of an acid is 266.985 g/mole

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3 years ago

Why should you be careful when you heat your NaCl solution to evaporate the water?

ivolga24 [154]

Answer & Explanation:

If we heat the NaCl solution strongly, it boils and moves vigorously causing some of the solution to get out of the container.

This will cause loss of NaCl in the amount that get out of the container.

So, this affect the yield of the obtained NaCl after water evaporation.

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3 years ago

Writing Chemical Equations

nignag [31]

Answer:

The prefix di means 2 and the prefix hexa means 6.

As per IUPAC rules you must use the prefixes to indicate the number of atoms of each element in the formula.

So, the proper name for the compound C2H6 is dicarbon hexahydride.

Explanation:

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3 years ago

What does the poitof incidence mean?​

What does the poitof incidence mean?