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2 years ago

Which statement explains why H2O has a

Chemistry

1 answer:

Rama09 [41]2 years ago

5 0

Answer:

Explanation:

H2O has a higher intermolecular force (hydrogen bonding) where N2 only has London Dispersion.

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Each element possesses unique chemical and physical properties. true or false

g100num [7]

True. An element's properties are based on their atomic numbers, atomic masses and electron configurations.

Hope it helped!

8 0

3 years ago

Calculate the pH of the solution formed when 45.0 mL of 0.100M NaOH solution is added to 50.0 mL of 0.100M CH3COOH (Ka for aceti

pav-90 [236]

Answer:

pH of soltion will be 5.69

Explanation:

The pH of the solution will be due to excessive acid left and the salt formed. Thus, it will form a buffer solution.

The pH of buffer solution is calculated from Henderson Hassalbalch's equation, which is:

$pH=pKa+log(\frac{[salt]}{[acid]} )$

$pKa=-log(Ka)$

$pKa=-log(1.8X10^{-5})=4.74$

The moles of acid taken :

$moles=molarityXvolume=0.1X50=5mmol$

The moles of base taken:

$moles=molarityXvolume=0.1X45=4.5mmol$

The moles of acid left after reaction :

$5-4.5=05mmol$

The moles of salt formed = 4.5mmol

Putting values in equation

$pH=pKa+log(\frac{[salt]}{[acid]} )=4.74+log(\frac{4.5}{0.5})=5.69$

8 0

3 years ago

Visible light with a wavelength of 4.7x10^-7 meters will have a frequency of ....

Zarrin [17]

The answer is ....... 47/10^8

6 0

3 years ago

An example of an adaptation that gives an organism greater access to energy

FrozenT [24]

A vestigial structure is a feature of an organism's body that was once an adaptation shaped by natural selection, but which is no longer useful in their current environment. For example, some species of fish that live in completely dark caves have eyes, although their eyes cannot see and serve no function.

8 0

4 years ago

Convert 30.0 mºto cm3.

Doss [256]

Answer:

3.00x107 cm

Explanation:

They answer would be the 4th one

3 0

3 years ago