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4 years ago

In a molecule of methane (ch4), what type of bond joins the carbon atom to each of the hydrogen atoms?

1 answer:

8 0

A polar covalent bond, the electronegativity of carbon is 2.6, and for hydrogen it's 2.1, therefore their bond is polar, but the molecule itself is not, because of its 3D structure

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A 0.01 M aqueous NaOH solution has a hydroxide concentration of ————— M?

MA_775_DIABLO [31]

Answer:

Has a hydroxide concentration of 0.01M

Explanation:

When NaOH dissociates, it gives 1mol Na+ and 1mol OH- this multiplies the concentration value and we get 0.01×1= 0.01M

4 0

3 years ago

Solubility is determined by the molecular or ionic structures of the solute and the solvent, and by the _________ that hold toge

Natalija [7]

Answer:

Solubility is determined by the molecular or ionic structures of the solute and the solvent, and by the intermolecular forces that hold together the particles of each substance

Explanation:

- Ionic bonds and covalent bonds are sort of intermolecular forces

-State of matter does not hold together the particles of each substance

4 0

3 years ago

Colloids and suspension are described as ________ heterogeneous _________ mixtures

solong [7]

The question is already answered.

3 0

3 years ago

A material has an ASTM grain size number of 7. Determine the magnification, if the number of grains per square inch observed is:

Luden [163]

Answer:

A) M = 100X

B) M = 36X

C) M = 178.88X

Explanation:

Given data:

ASTM grain size number 7

a) total grain per inch^2 - 64 grain/inch^2

we know that number of grain per square inch is given as

$Nm = 2^{n-1} (\frac{100}{M})^2$

where M is magnification, n is grain size

therefore we have

$64 = 2^{7-1}(\frac{100}{M})^2$

solving for M we get

M = 100 X

B) total grain per inch^2 = 500 grain/inch^2

we know that number of grain per square inch is given as

$Nm = 2^{n-1} (\frac{100}{M})^2$

where M is magnification, n is grain size

therefore we have $500 = 2^{7-1}(\frac{100}{M})^2$

solving for M we get

M = 36 X

C) Total grain per inch^2 = 20 grain/inch^2

we know that number of grain per square inch is given as

$Nm = 2^{n-1} (\frac{100}{M})^2$

where M is magnification, n is grain size

therefore we have $20 = 2^{7-1}(\frac{100}{M})^2$

solving for M we get

M = 178.88 X

8 0

3 years ago

In a solution, the solute is the substance in the smaller amount. True False

blondinia [14]

The substance that is in the smaller amount is the solute. so yes, the answer is true.

6 0

3 years ago

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