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3 years ago

Although tom was a poor student, he studied very well

1 answer:

3 0

Tom. The ‘T’ should be in capital. Every sentence should end with a full stop ‘.’ . This also has nothing to do with Chemistry. So yeah. Mark me brainliest please.

You might be interested in

A diploid somatic ("body") cell has 2n = 20 chromosomes. At the end of mitosis, each daughter cell would have ______ chromosomes

kozerog [31]

Answer:

At the end of mitosis, 2n = 20

At the end of meiosis I, n = 10

At the end of meiosis II, n = 10

Explanation:

Mitosis is a type of cell division in which daughter cell produced are genetically identical to their mother cell. So, no. of chromosome does not change after mitosis.

So, at the end of mitosis, each daughter cell would have 20 chromosome.

Meiosis is a type of cell division in which mother cell produces two haploid cells ones with a single set of chromosomes.

Meiosis is a two step cell division, Meiosis I and Meiosis II.

In meiosis I, homologous pair separates, so no. of chromosomes becomes half.

In meiosis II, sister chromatids separates. So, the number of chromosomes remains same (i.e. Have same no. of chromosome as present in cell produced after meiosis I).

So, at the end of mitosis, each daughter cell would have 20 chromosome.

At the end of meiosis I, each daughter cell would have n = 10 chromosomes. At the end of meiosis II, each daughter cell would have n = 10 chromosomes.

7 0

3 years ago

Which statements describes why ethyl methyl ether (b.p. 7.9°C) and 1-propanol (b.p. 97.2°C) have such different boiling points d

Lelu [443]

Answer:

B) 1-propanol has more hydrogen bonding than ethyl methyl ether.

Explanation:

1-propanol and ethyl methyl ether look very similar but have very different boiling points. They both have three carbon atoms but ethyl methyl ether has an oxygen atom.

Ethyl methyl ether has both London dispersion forces and dipole-dipole interactions.

1-Propanol has London dispersion forces, dipole-dipole interactions and hydrogen bonding.

1-propanol has more hydrogen bonding than ethyl methyl ether which explains why they both have different boiling points.

3 0

3 years ago

Whenever you heat liquids, especially near their boiling point, you should always use a stir bar or boiling stones. Why is this?

bogdanovich [222]

Answer:

Boiling stones and stir bars serve to help the liquid to boil more calmly avoiding it to become superheated or bumping and with this preventing accidents, projection of dangerous liquids or burns.

I hope you find this information useful and interesting! Good luck!

4 0

3 years ago

What will most likely happen if a sound wave moves from the air through a solid?

melamori03 [73]

The wavelength of the associated sound will increase.

6 0

3 years ago

A) Use bond enthalpies to estimate the enthalpy change for the reaction of hydrogen with ethene.

garri49 [273]

Answer:

(a) -134 kJ (b) -136 kJ

Explanation:

a) Using the accounting of the enthalpy of broken and formed bonds we will have the answer for this question ( remember the enthalpy of bonds broken are positive and those formed are negative)

ΔHrxn(kJ) = 6H (C-H) + 1 (C-C)+ 1H (H) + 1(C=C) + 4(C-H)

= 6(-411) +(-346) +432 + 602 + 4(411)

= - 134 kJ

(b) ΔHrxn = ΔHºf(C2H6) - ΔHºf (C2H4) = -83.75 kJ- 52.3 kJ = -136 kJ

( ΔHºf (H2)) = 0)

8 0

3 years ago