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3 years ago

What type of wave is a s-wave and how does energy move through the wave

Chemistry

1 answer:

Blizzard [7]3 years ago

3 0

In S or shear waves, rock oscillates perpendicular to the direction of wave propagation.

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Is a faded picture a chemical or physical change?

nalin [4]

It is a chemical change

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3 years ago

Read 2 more answers

The formula relating mass and weight is W=

KatRina [158]

Answer:

The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.

Explanation:

6 0

2 years ago

Explain why the rusting of an iron bar decreases the strength of the car?

Vlad [161]

Because it means the iron is becoming very weak. The more rust = weaker

8 0

3 years ago

Assuming the boiling point increased by 2 Â°C, what is the approximate molality of NaCl when the video ends? Kbp(water) = 0.512

makkiz [27]

Answer : The molality of NaCl is, 1.95 mol/kg

Explanation :

Formula used for Elevation in boiling point :

$\Delta T_b=i\times k_b\times m$

where,

$\Delta T_b$ = change in boiling point = $2^oC$

$k_b$ = boiling point constant for water = $0.512^oC/m$

m = molality

i = Van't Hoff factor = 2 (for electrolyte)

The dissociation $NaCl$ will be,

$NaCl\rightarrow Na^++Cl^{-}$

So, Van't Hoff factor = Number of solute particles = $Na^++Cl^{-}$ = 1 + 1 = 2

Now put all the given values in the above formula, we get:

$2^oC=2\times (0.512^oC/m)\times m$

$m=1.95mol/kg$

Therefore, the molality of NaCl is, 1.95 mol/kg

6 0

3 years ago

Rank the following compounds in order of their reactivity toward nucleophilic acyl substitution. (Fastest first, slowest last) 2

dalvyx [7]

Answer:

Trinitrobenzoic acid > para nitro benzoic acid>benzoic acid

Nulceophilic acyl Substitution increases by electron withdrawing group (NO2) more the no of withdrawing groups more the reactivity

Since withdrawing group increases positive charge hence nucleophilie readily reacts.

Acidity of Carboxylic acid is explained by inductive effect

Withdrawing group (halogen) increases the acidity and acidity decreases with increasing the distance between halogen and COOH group

And lower the acidity higher the pka and Vice-Versa.

Hence 2-Chlorobutanoic acid has lower pka and more acidic than 3-chloro and 4-chlorobutanoic acids

4 0

3 years ago