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3 years ago

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can someone pleaseeee help me with this so basically do a food web with these animals ( the food web is supposed to look like th

e example for the second picture) I WILL ALSO MARK YOU BRAINLIEST i just really need help because i don't understand

1 answer:

dangina [55]3 years ago

3 0

Answer:

umm i cant see the pictures

Explanation:

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What determines an object's potential energy?

Flura [38]

Answer:

potential energy of an object depend on three factors. If an object has less mass,it will travel more distance, and Higher the mass of an object Distance tra

Explanation:

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3 years ago

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The pH of an acetic acid solution is 4.0. (10n= 1en).

frosja888 [35]

Answer:

1. [H+] = 1 x 10^-4mol/L

2. [OH-] = 1 x 10^-10mol/L

Explanation:

1. From the question given, the pH is 4.0. We can obtain the value of the value of the hydrogen ion concentration [H+] as follows:

pH = —Log[H+]

4 = —Log[H+]

—4 = Log[H+]

Anti-log of —4

[H+] = 1 x 10^-4mol/L

2. Recall: [H+] x [OH-] = 1 x 10^-14

But [H+] = 1 x 10^-4mol/L

1 x 10^-4 x [OH-] = 1 x 10^-14

Divide both side by 1 x 10^-4mol/L

[OH-] = 1 x 10^-14/1 x 10^-4

[OH-] = 1 x 10^-10mol/L

8 0

3 years ago

A diner adds sugar into their coffee until the sugar starts to precipitate. If they then add more coffee to their drink, what ty

PtichkaEL [24]

Answer:

unsaturated solution

Explanation:

This solution is made by the coffee, which is the solvent and the sugar, which is the solute. The solute dissolves in the solvent.

Sugar starts to precipitate because it cannot dissolve anymore. This means that the solution at the equilibrium point and is saturated. Since more coffee or solvent is added, the solution will now be able to dissolve more sugar. This means that the solution is unsaturated

5 0

3 years ago

Help!!!!!!!!!!!!!!!!!!

olga nikolaevna [1]

$\\ \rm\longmapsto 9.7300\times 10^2+9.8700\times 10^3$

$\\ \rm\longmapsto 9.73\times 10^4+9.87\times 10^3$

$\\ \rm\longmapsto 19.6\times 10^{4+3}$

$\\ \rm\longmapsto 19.6\times 10^7$

4 0

3 years ago

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Write the complete ionic equations, spectator ions and net ionic equation for the following.

gizmo_the_mogwai [7]

Answer:

Explanation:

1) ZnBr₂ (aq) + AgNO₃ (aq)

Chemical equation:

ZnBr₂ (aq) + AgNO₃ (aq) →Zn(NO₃)₂(aq) + AgBr(s)

Balanced chemical equation:

ZnBr₂ (aq) + 2AgNO₃ (aq) →Zn(NO₃)₂(aq) + 2AgBr(s)

Ionic equation:

Zn²⁺(aq) + Br₂²⁻ (aq) + 2Ag⁺ (aq)+ 2NO⁻₃ (aq) → Zn²⁺(aq) +(NO₃)₂²⁻(aq) + 2AgBr(s)

Net ionic equation:

Br₂²⁻ (aq) + 2Ag⁺ (aq) → 2AgBr(s)

The Zn²⁺((aq) and NO⁻₃ (aq) are spectator ions that's why these are not written in net ionic equation. The AgBr can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.

2) HgCl₂ (aq) + KI (aq) →

Chemical equation:

HgCl₂ (aq) + KI (aq) → KCl + HgI₂

Balanced chemical equation:

HgCl₂ (aq) + 2KI (aq) → 2KCl(aq) + HgI₂(s)

Ionic equation:

Hg²⁺(aq) + Cl₂²⁻ (aq) + 2K⁺(aq) + 2I⁻ (aq) → HgI₂ (s) + 2K⁺(aq) + 2Cl⁻ (aq)

Net ionic equation:

Hg²⁺(aq) + 2I⁻ (aq) → HgI₂ (s)

The Cl⁻ ((aq) and K⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The HgI₂ (s) can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.

3) Ca(OH)₂ (aq) + Na₂SO₄ (aq)

Chemical equation:

Ca(OH)₂ (aq) + Na₂SO₄ (aq) → CaSO₄(s) + NaOH(aq)

Balanced chemical equation:

Ca(OH)₂ (aq) + Na₂SO₄ (aq) → CaSO₄(s) + 2NaOH(aq)

Ionic equation:

Ca²⁺(aq) + OH₂²⁻ (aq) + 2Na⁺(aq) + SO₄²⁻ (aq) → CaSO₄(s) + 2Na⁺(aq) + 2OH⁻ (aq)

Net ionic equation:

Ca²⁺(aq) + SO₄²⁻ (aq) → CaSO₄(s)

The OH⁻ ((aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The CaSO₄ can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.

4 0

3 years ago