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2 years ago

What is a insect and name one.

Chemistry

2 answers:

lidiya [134]2 years ago

7 0

Answer:

a ladybug I hope this helps you

ollegr [7]2 years ago

4 0

Heh this is easy *anim~e glasses turn white as he activates his smarts*

a small arthropod animal that has six legs and generally one or two pairs of wings

name one? easy as ever

dragon fly

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As the temperature of a substance increases, the kinetic energy of the molecules _____________ and they begin to move __________

Dimas [21]

Answer:

The correct answer is "increase; faster".

Explanation:

The kinetic energy is defined as the power that an object has result of its movement. The kinetic energy of a substance has a direct relation with the temperature. As the temperature rises, the kinetic energy of the molecules increases, result of an increase in the speed of its movement. A higher temperature causes that the particles vibrate faster, which increases the kinetic energy.

3 0

3 years ago

(b) Once the ionic solid has dissolved, the anion that is formed is able to react as a base, with water as the acid. Write the n

Marrrta [24]

Answer:

b C₂H₃O₂⁻ + H₂O ⇄ HC₂H₃O₂ + OH⁻

e HC₂H₃O₂ + H₂O ⇄ H₃O⁺ + C₂H₃O₂⁻

f ka<<1

g. Weak acid molecules and water molecules

Explanation:

The water molecule could act as a base and as an acid, a molecule that have this property is called as amphoteric.

b The salt NaC₂H₃O₂ is dissolved in water as Na⁺ and C₂H₃O₂⁻. The reaction of the anion with water is:

C₂H₃O₂⁻ + H₂O ⇄ HC₂H₃O₂ + OH⁻

Where the C₂H₃O₂⁻ is the base and water is the acid.

e. The reaction of HC₂H₃O₂ (acid) with water (base), produce:

HC₂H₃O₂ + H₂O ⇄ H₃O⁺ + C₂H₃O₂⁻

f. As the acetic acid (HC₂H₃O₂) is a week acid, the dissociation in C₂H₃O₂⁻ is not complete, that means that ka<<1

g. The ka for this reaction is 1,8x10⁻⁵, that means that there are more weak acid molecules (HC₂H₃O₂) than conjugate base ions. Also, the water molecules will be in higher proportion than hydronium ions.

I hope it helps!

4 0

3 years ago

Help, timed assignment

babunello [35]

Answer:

Explanation:

ALL CELLS USE CELLULAR RESPIRATION

6 0

3 years ago

Choose the statement below that is TRUE. Question 7 options: The term "strong electrolyte" means that the substance is extremely

Setler [38]

Answer: A weak acid solution consists of mostly nonionized acid molecules.

Explanation:

Strong electrolytes are those solutions which undergo complete dissociation when dissolved in water. The dissociation of strong electrolytes is given by a right arrow.

Weak electrolytes are those solutions which do not undergo complete dissociation when dissolved in water. The dissociation of weak electrolytes is given by a rightleft arrow.

Weak acids are those substances which dissociate partially to give $H^+$ ions when dissolved in water. Thus most of molecules remain unionized in solutions.

$CH_3COOH\rightleftharpoons CH_3COO^-+H^+$

Strong acids are those substances which dissociate completely to give $H^+$ ions when dissolved in water.

$HNO_3(aq.)\rightarrow H^+(aq.)+NO_3^-(aq.)$

3 0

3 years ago

Calculate the mole fraction of the total ions in an aqueous solution prepared by dissolving 0.400 moles of MgBr2 in 850.0 g of w

diamong [38]

moles water = 850.0 g / 18.02 g/mol=47.2
moles Mg2+ = 0.400
moles Cl- = 2 x 0.400 = 0.800
moles ions = 0.400 + 0.800= 1.2
mole fraction ions = 1.2 / 1.2 + 47.2 =0.0248

7 0

3 years ago

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