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3 years ago

Omg, I need help ASAP. Btw this is science.

Chemistry

1 answer:

nikdorinn [45]3 years ago

4 0

Answer: B. Asexual Reproduction

Explanation:

Vascular is typically only spores, sexual reproduction does not seem to fit this, and fertilization could be a key but most likely not. I am sorry if this is wrong.

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The ___ is the number of protons in the nucleus of an atom of an element. Fill in the blank.

Maurinko [17]

The atomic number is the number of protons in the nucleus

8 0

3 years ago

28)

White raven [17]

Answer:

D [polymers]

Explanation:

The joining of monomers (small molecules) is polymerization.

6 0

4 years ago

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Which coefficient of O2 is needed to balance the equation C3H8 + O2 → 3CO2 + 4H2O?

Darina [25.2K]

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3 years ago

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What is the name of a hydrocarbon that has the formula CH3(CH2)4CCH?

ivann1987 [24]

Hello!

CH3(CH2)4CCH or C7H12

 $CH_3 - CH_2 - CH_2 - CH_2 - CH_2 - C \equiv C-H$

hydrocarbon: 1-heptyne

5 0

4 years ago

Express the concentration of a 0.0320 M aqueous solution of fluoride, F−, in mass percentage and in parts per million (ppm). Ass

denis23 [38]

Answer:

607 ppm

Explanation:

In this case we can start with the ppm formula:

$ppm=\frac{mg~of~solute}{Litters~of~solution}$

If we have a solution of 0.0320 M, we can say that in 1 L we have 0.032 mol of $F^-$ , because the molarity formula is:

$M=\frac{mol}{L}$

In other words:

$0.0320~M=\frac{mol}{1~L}$

$mol=0.032~M*1~L=0.032~mol$

$1~L~of~Solution=0.0320~mol~of~solute$

If we use the atomic mass of $F$ (19 g/mol) we can convert from mol to g:

$0.0320~mol~F^-\frac{19~g~F^-}{1~mol~F^-}~=~0.607~g$

Now we can convert from g to mg (1 g= 1000 mg), so:

$0.607~g\frac{1000~mg}{1~g}=607~mg$

Finally we can divide by 1 L to find the ppm:

$ppm=\frac{607~mg}{1~L}=~607~ppm$

We will have a concentration of 607 ppm.

I hope it helps!

4 0

4 years ago