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Citrus2011 [14]
3 years ago
7

Substances which will glow in the dark after being exposed to sunlight are called:

Chemistry
2 answers:
DiKsa [7]3 years ago
7 0

Answer:

phosphorescent substances.

Explanation:

nordsb [41]3 years ago
6 0
It  is called phosphorescent substances. 
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Which of the following bonds is the strongest?
mr Goodwill [35]
The answer to this question will be c
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State one type of additional information that could be used to determine if these three species are closely related.
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Answer:

Study the bone structure of limbs.

Explanation:

Study the bone structure of limbs can be used to find out the relatedness and relationship among three species because the pattern of bones structure is similar but the structure is different from one another due to different environmental conditions. This study provides important and useful information whether the three species are closely related or not. If they have similar bone structure than we can say that there are more chances that they are closely related to each other.

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What does the skeletal system work with?
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Answer:Shape

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3 years ago
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A 100. 0 ml sample of 0. 10 m nh3 is titrated with 0. 10 m hno3. Determine the ph of the solution after the addition of 100. 0 m
DerKrebs [107]

The pH of the solution after the addition of 100. 0 ml of HNO3. The kb of NH3 is 1. 8 × 10-5. So, pH is 10.9 basic .

This neutralization occurs as the acid is added to the base:

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The initial moles of NH3present is given by,

nNH3= c×v= 0.10× 100/1000= 0.01m

The number of moles of

HNO3 added is given by:

nHNO3= c×v= 0.10× 100/1000= 0.001

It is clear from the equation that the acid and base react in a 1:1 molar ratio. So, the no. moles of NH3remaining will be 0.01 - 0.001= 0.009

The total volume is now

100.0+100.0= 200.0x cm3

The concentration of NH3 is given by,

[NH3]= c/v= 0.001/200/1000= 0.05x mol/l .

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where b is the base's concentration.

Given that there is little dissociation, we can roughly compare this to the starting concentration.

pKb= −logKb= −log(1.8×10−5)= 4.744

pOH= 3.056

At 25∘xC, we know that, pH+ pOH=14

pH= 14− 3.056= 10.9

To know more about Equilbrium, visit-brainly.com/question/14366127

#SPJ4

8 0
1 year ago
we can determine the velocity of a wave when given the _______ and the wavelength. (2 points) frequency amplitude crest equilibr
slavikrds [6]
Frequency.

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