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harina [27]
3 years ago
14

Science, compare and contrast Quantitative and Qualitative observations

Chemistry
1 answer:
Mekhanik [1.2K]3 years ago
6 0

Quantitative observation have accuracy over qualitative observation as in Quantitative observation data is recorded in terms of number .

Explanation:
Qualitative observations are descriptive observations that don't involve numbers. " The freezing point of water is colder than the boiling point " is an example. Quantitative observations are numerical measurements. "The freezing point of watrr is 0 c and boiling point is 100 c" is a quantitative observation.
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Which of these did you include in your response?
Natalka [10]

Answer:

Check all of them

Explanation:

All are correct.

- stong electrolytes dissolve completely

- weak disolve partially

- nonelectrolytes do not dissolve

7 0
4 years ago
Which of the statements about the properties of the carbon-carbon double bond is not true? Group of answer choices Whenever the
ella [17]

Answer:

Whenever the two groups on each end of a carbon-carbon double bond are the same, two diastereomers are possible.

Explanation:

Double bonds are formed when four electrons are shared between two carbon atoms. The second bond is generally known as a pi-bond while the first bond is called a sigma bond.

The presence of a double bond in a compound leads to restricted rotation about the carbon-carbon double bond. Hence the substituents are 'locked' in a particular configuration.

The more substituted a double bond is, the more stable it is according to Saytzeff's Rule.

Due to steric effects, trans alkenes are generally more thermodynamically stable than cis alkenes since trans alkenes have bulky groups oriented apart from each other.

All these are true statements. The answer selected must be the untrue statement.

8 0
3 years ago
a blank in the speed of the molecules allows the attractions between atoms and a little closer together
anygoal [31]
Idk it’s there’s a picture(it won’t load or no picture) but when molecules move slow and are kidna packed together it is a solid
6 0
4 years ago
List the following aqueous solutions in order of increasing boiling point: 0.12 m C6H12O6, 0.05 m LiBr, and 0.05 m Zn(NO3)2. Exp
GalinKa [24]

<u>Answer:</u> The order of increasing boiling points follows:

\text{LiBr }

<u>Explanation:</u>

The expression of elevation in boiling point is given as:

\Delta T_b=i\times k_b\times m

where,

\Delta T_b = Elevation in boiling point

i = Van't Hoff factor  

T_b = change in boiling point

k_b = boiling point constant

m = molality

For the given options:

  • <u>Option 1:</u>  0.12 m C_6H_{12}O_6

Value of i = 1   (for non-electrolytes)

So, molal concentration will be = (0.12)\times 1=0.12m

  • <u>Option 2:</u>  0.02 m LiBr

Value of i = 2

So, molal concentration will be = (0.02)\times 2=0.04m

  • <u>Option 3:</u>  0.05 m Zn(NO_3)_2

Value of i = 3

So, molal concentration will be = (0.05)\times 3=0.15m

As, the molal concentration of Zn(NO_3)_2 is the highest, so its boiling point will be the highest.

Hence, the order of increasing boiling points follows:

\text{LiBr }

8 0
3 years ago
When was the periodic table of elements first published?
Travka [436]
I think this answer is D or C
4 0
3 years ago
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