3 years ago

What happened when you closed your hand around the sponge?

Chemistry

1 answer:

faltersainse [42]3 years ago

6 0

Answer:

your hand will get wet with sopa

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Question 16 (6 points)

MakcuM [25]

Answer:

1.) Fluorine

2.) Francium

3.) Nonmetals

4.) Metals

5.) Aluminum

6.) Helium

Explanation:

6 0

4 years ago

How many moles of N2 will occupy a 5.58 L container at STP?

melamori03 [73]

1 mole ------------- 22.4 L ( at STP)
?? moles --------- 5.58 L

5.58 x 1 / 22.4 => 0.249 moles of N₂

7 0

3 years ago

The reaction O3 + NO → O2 + NO2 has Ea = 10.7 kJ/mole and ΔH = – 199.8 kJ/mole. What is the activation energy for the following

inysia [295]

Answer:

Ea = 210.5kJ/mole

Explanation:

When the reaction:

O3 + NO → O2 + NO2

Occurs, requires 10.7kJ/mole and releases -199.8kJ/mole.

For the forward reaction:

O2 + NO2 → O3 + NO

The Ea is the sum of Ea of the forward reaction and - ΔH, that is:

Ea = Ea - (-ΔH)

Ea = 10.7kJ/mol - (-199.8kJ/mol)

Ea = 210.5kJ/mole

4 0

3 years ago

The K b Kb for an amine is 4.004 × 10 − 5 . 4.004×10−5. What percentage of the amine is protonated if the pH of a solution of th

Alexxandr [17]

Answer:

The percentage of amine is protonated is 63,07%

Explanation:

The reaction of an amine RNH₃ (weak base) with water is:

RNH₃ + H₂O ⇄ RNH₄⁺ + OH⁻

The kb is defined as:

$kb = \frac{[RNH_{4}^+][OH^-]}{[NH_{3}]}$

As kb = 4,004x10⁻⁵ and [OH⁻] is $10^{-(14-9,370)}=2,344x10^{-5}$ :

$4,004x10^{-5} = \frac{[RNH_{4}^+][2,34x10^{-5}]}{[NH_{3}]}$

1,708 = [RNH₄⁺] / [RNH₃] (1)

As the total amine is a 100%:

[RNH₄⁺] + [RNH₃] = 100% (2)

Replacing (1) in (2):

1,708 [RNH₃]+ [RNH₃] = 100%

2,708 [RNH₃] = 100%

[RNH₃] = 36,93%

Thus,

 [RNH₄⁺] = 63,07%

The percentage of amine protonated is 63,07%

I hope it helps!

4 0

4 years ago

On the periodic table, columns go ________________?

gizmo_the_mogwai [7]

Up and down

periods go left to right

4 0

3 years ago