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Chemistry

1 answer:

arsen [322]3 years ago

8 0

Answer:

Explanation:

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4.28 x 10^24 molecules of chlorine gas to moles of chlorine gas.

mamaluj [8]

Answer:

7.1 moles Cl₂

Explanation:

To solve this problem we will use Avogadro's number (Aₙ), which tells us how many molecules (or atoms) are present in 1 mol of any given substance

Aₙ = 6.023 x 10²³ molecules/mol

With that in mind now we proceed to convert molecules into moles:

4.28 x 10²⁴ molecules Cl₂ ÷ 6.023 x 10²³ molecules/mol = 7.1 moles Cl₂

5 0

3 years ago

Of the molecules below, the bond in __________ is the most polar. hbr hi hcl hf

Black_prince [1.1K]

There's a trend in electronegativity. The bottom left of periodic table is the lowest (0.7) and the upper right is the highest (4.0). The most polar is the greatest difference in electronegavity. hbr- 1~ , hi- 0.5~ ,hcl - 1.3~ , hf-1.8 so,hf is the answer

7 0

3 years ago

The notation for the nuclide gives information about

Sever21 [200]

I think mass and atomic number

8 0

4 years ago

What is the empirical formula for a compound that is 83.7% carbon and 16.3% hydrogen?

zubka84 [21]

Hello!

We use the amount in grams (mass ratio) based on the composition of the elements, see: (in 100 g solution)

C: 83.7% = 83,7 g
H: 16.3% = 16.3 g

Let us use the above mentioned data (in g) and values will be converted to amount of substance (number of moles) by dividing by molecular mass (g / mol) each of the values, lets see:

$C: \dfrac{83.7\:\diagup\!\!\!\!\!g}{12\:\diagup\!\!\!\!\!g/mol} \approx 6.975\:mol$

$H: \dfrac{16.3\:\diagup\!\!\!\!\!g}{1\:\diagup\!\!\!\!\!g/mol} = 16.3\:mol$

We note that the values found above are not integers, so let's divide these values by the smallest of them, so that the proportion is not changed, let's see:

$C: \dfrac{6.975}{6.975} = 1$

$H: \dfrac{16.3}{6.975} \approx 2.3$

Note: So the ratio in the smallest whole numbers of carbon to hydrogen is 3:7, thus, the minimum or empirical formula found for the compound will be:

$\boxed{\boxed{C_3H_7}}\end{array}}\qquad\checkmark$

I hope this helps. =)

8 0

3 years ago

Which solution will have the highest ph? the ka of hclo is 3.8 × 10−8.

Ilya [14]

The one with the highest pH would be a solution with 100 mL of water and also 20 mL of 0.1 M NaOH is added. Solutions without buffers would have the highest pH since the resistance to change is very low. Hope this answers the question.

3 0

3 years ago