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Arada [10]
2 years ago
10

How does a tree get energy?

Chemistry
2 answers:
Snezhnost [94]2 years ago
6 0
Your answer is B. It gets energy from the Sun.
Have a great day :)
GuDViN [60]2 years ago
6 0
The correct answer is b
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If 0.500 mol of NaN3 react what mass I'm grams of nitrogen would result
klemol [59]
Looks like 3*.5 mol of N, or 1.5*.5 N2 
<span>convert that to grams.</span>
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3 years ago
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stiks02 [169]

Answer:

B on both questions

Explanation:

6 0
2 years ago
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A 100.0 mL sample of 0.300 M NaOH is mixed with a 100.0 mL sample of 0.300 M HNO3 in a coffee cup calorimeter. If both solutions
Mars2501 [29]

Answer:

Qm  = -55.8Kj/mole

Explanation:

NaOH(aq) + HNO₃(aq) => NaNO₃(aq) + H₂O(l)

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Given => 100ml(0.300M) NaOH(aq) + 100ml(0.300M)HNO₃(aq)

=> 0.03mole NaOH(aq) + 0.03mole HNO₃(aq)

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ΔH⁰rxn = [(200ml)(1.00cal/g∙°C)(37 – 35)°C]water / 0.03mole HNO₃

= 13,333 cal/mole x 4.184J/cal = 55,787J/mol = 55.8Kj/mole (exothermic)*

Heat of reactions comes from formation of H-Oxy bonds on formation of water of reaction and heats the 200ml of solvent water from 35⁰C to 37⁰C.

4 0
3 years ago
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Marta_Voda [28]
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