3 years ago

9. The formular for finding the area

Chemistry

1 answer:

sukhopar [10]3 years ago

4 0

Answer:

D. length × width

Explanation:

eg. 30 cm(length) × 20cm(width) = 600cm²

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As the elements of group 16 (VIA) are considered from top to bottom on the Periodic Table, the atomic radii

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For group 16 elements, the atomic radii increases down the group as a shell of electron is added on each time.

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3 years ago

How many molecules are in 15 grams of Oxygen gas?

gtnhenbr [62]

Number of grams in 1 mole = 6.23 * 10^23
Now, in 15, it would be: 15 / 6.23 * 10^23 = 2.5 * 10^-24 moles (approx.)

In short, Your Answer would be Option C

Hope this helps!

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3 years ago

Which element is likely to have the highest thermal conductivity

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sodium element is likely to have the highest thermal conductivity

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How many ml of concentrated hydrochloric acid would be required to make 1 L of a 0.2 M solution? Assume that concentrated hydroc

fgiga [73]

<u>Answer:</u> The volume of concentrated hydrochloric acid required is 16.53 mL

<u>Explanation:</u>

To calculate the volume of concentrated solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the concentrated solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted solution

We are given:

Conversion factor: 1 L = 1000 mL

$M_1=12.1M\\V_1=?mL\\M_2=0.2M\\V_2=1L=1000mL$

Putting values in above equation, we get:

$12.1\times V_1=0.2\times 1000\\\\V_1=16.53mL$

Hence, the volume of concentrated hydrochloric acid required is 16.53 mL

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Which of the following is NOT an example of covalent bonding? * 2 points H20 NaF NH3 O2

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Answer:

I THINK NH3

Explanation:

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