The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.
Hi! I’m pretty sure the answer is B.
Answer:
Differentiate between the conductivity of silver and silver chloride solution.
Explanation:
Answer:
Model
Theory
Ellipse
Explanation:
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That is the balanced chemical equation.
Before reaction,
milli-moles of Mg(OH)2 = 100 x 0.02 = 2
milli-moles of HNO3 = 100 x 0.05 = 5
After reaction:
Mg(OH)2 is limiting reagent. It will react completely leaving some HNO3 behind.
milli-moles of HNO3 react = 2 x coefficient of HNO3 = 2 x 2 = 4
milli-moles of HNO3 left = 5 -4 = 1
Now, total volume = 100+ 100 = 200 mL
It is asked for hydronium ion concentration, which is basically hydrogen ion conc.
1 HNO3 will dissociate to give 1 H+ ion.
so, milli-moles of H+ = 1
So, concentration of H+ or hydronium(H3O+) = 1 / 200 = 0.005