Density is a physical property of a substance that represents the mass of that substance per unit volume. It is a property that can be used to describe a substance. We calculate the volume as follows:
21 grams Ag ( 1 L / 10.5 grams ) = 2 L of container is needed for the given mass of silver
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A response that is chemical in nature and is characterized with the aid of the release of power in the shape of warmth or light is referred to as an exothermic response.
Following processes are exothermic:-
freezing of water.
digestion of food.
a person running.
heating with a furnace.
Following processes are endothermic:-
boiling of water.
a person growing.
wood being chopped.
Endothermic reactions are chemical reactions wherein the reactants soak up warmness electricity from the environment to shape products. those reactions decrease the temperature of their surrounding place, thereby growing a cooling impact.
DISCLAIMER:- Your question is incomplete , see full question below:-
Classify the following processes as exothermic or endothermic:
(a) freezing of water.
(b) boiling of water.
(c) digestion of food.
(d) a person running.
(e) a person growing.
(f) wood being chopped.
(g) heating with a furnace.
Learn more about exothermic here:- brainly.com/question/2924714
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Respiration, B. I know this because I love animals...
Answer:
Explanation:
We must use the Nernst equation
E_{\text{cell}} = E_{\text{cell}}^{\circ} - \dfrac{RT}{zF}\ln Q
We want Ecell < 0 for a reverse reaction, so assume it is 0.
Step 1. Calculate E°cell
Anode: 3Zn ⟶ 3Zn²⁺(4 mol·L⁻¹) + 6e⁻; E° = +0.7618 V
<u>Cathode: 2Cr³⁺ (x mol·L⁻¹) + 6e⁻ ⟶ 2Cr; </u> E° = <u>-0.744 V</u>
Overall: 3Zn + 2Cr³⁺(x mol·L⁻¹) ⟶ 3Zn²⁺(4 mol·L⁻¹) + 2Cr; E° = +0.018 V
Step 2. Calculate Q
3. Calculate [Cr³⁺]