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3 years ago

Plz help me with seven eight and nine

Chemistry

1 answer:

Nookie1986 [14]3 years ago

4 0

7 is atomic symbol 9 is atomic density 8 is the atomic number

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How does the shape of a molecule affect the polarity of the molecule?

ruslelena [56]

Answer:

It is A

Explanation:

If you think about it, no-polar covalent bonds are in a symmetrical line, and polar bonds are on the diagonals of the center atom.

I hope I helped :)

5 0

3 years ago

How many molecules of CH4 are in 48.2 g of this compound? A) 2.00 x 1023 B) 5.00 x 10-24 C)1.81 x 1024 D) 4.00 E) 4.64 x 1026 10

Tasya [4]

<u>Answer:</u> The correct answer is Option C.

<u>Explanation:</u>

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

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of methane = 48.2 g

Molar mass of methane = 16 g/mol

Putting values in above equation, we get:

$\text{Moles of }CH_4=\frac{48.2g}{16g/mol}=3.0125mol$

According to mole concept:

1 mole of compound contains $6.022\times 10^{23}$ number of molecules.

So, 3.0125 moles of methane will contain = $3.0125\times 6.022\times 10^{23}18.141\times 10^{23}=1.81\times 10^{24}$ number of molecules.

Hence, the correct answer is Option C.

8 0

3 years ago

What grade are you in or are you in college

Fofino [41]

Answer:

i am in 7th

Explanation:

6 0

3 years ago

Round to 4 significant figures.<br> 2.3581 x 103<br> [?] x 103

Masja [62]

Answer:

2.358

Explanation:

6 0

3 years ago

DESPERATE WILL GIVE BRAINLIST<br> Meiosis produces diploid cells.<br> True<br> False

GREYUIT [131]

Answer:

<h2>False</h2><h2>Meiosis produces 4 haploid cells. Mitosis produces 2 diploid cells. The old name for meiosis was reduction/ division. Meiosis I reduces the ploidy level from 2n to n (reduction) while Meiosis II divides the remaining set of chromosomes in a mitosis-like process (division).</h2>

Explanation:

Hope it helps

5 0

3 years ago

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