Helooo i need help please :)

Chemistry

1 answer:

Tatiana [17]2 years ago

6 0

It is a ,d and c just make sure tho

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Which element below would most likely gain 3 electrons?

Zanzabum

Answer:

Lithium

Explanation:

5 0

2 years ago

16.25 g of water at 54 C relaeases 402.7 J. What will be its final temp?

leonid [27]

Data:
Q = 402.7 J → releases → Q = - 402.7 J
m = 16.25 g
T initial = 54 ºC
adopting: c = 4.184J/g/°C
ΔT (T final - T initial) = ?

Solving:

Q = m*c*ΔT
-402.7 = 16.25*4.184*ΔT
-402.7 = 67.99*ΔT
$\Delta\:T = \frac{-402.7}{67.99}$
$\boxed{\Delta\:T \approx -5.92\:^0C}$

If: ΔT (T final - T initial) = ?
$-5.92^0 = T_{final} - 54^0$
$T_{final} = 54^0 - 5.92^0$
$\boxed{\boxed{T_{final} = 48.08\:^0C}}\end{array}}\qquad\quad\checkmark$

8 0

3 years ago

What happens when naoh is added to a buffer composed of ch3cooh and ch3coo−?

BartSMP [9]

Hello!

When NaOH is added to a buffer composed of CH₃COOH and CH₃COO⁻, the following reactions happen:

-First, the NaOH is neutralized by CH₃COOH:

NaOH + CH₃COOH → H₂O + CH₃COONa

-Second, the CH₃COONa dissociates in its ions:

CH₃COONa → CH₃COO⁻ + Na⁺

-Finally, CH₃COO⁻ (a weak base) reacts with water to form OH⁻ ions and regenerate CH₃COOH

CH₃COO⁻ + H₂O ⇄ CH₃COOH + OH⁻

By this sequence of reactions, the buffer can mitigate the effect of the strong base added.

Have a nice day!

7 0

3 years ago

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PLZ HELP!!!!!asapnow

Marrrta [24]

Answer:

Friction of wind against the ocean surface

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3 years ago

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If you remove the cap of a bottle of a soft drink carbon dioxide escapes the soft drink but the soft drink is still a solution.

Effectus [21]

Answer:

Removing the cap from a soft drink bottle releases pressure and causes the excess carbon dioxide molecules to come out as bubbles. however the drink is still supersaturated , and will release that carbon dioxide till it goes flat

6 0

2 years ago