Answer:
A) positive; added
Explanation:
Based on the reaction:
2NaHCO3(s) + 129kJ → Na2CO3(s) + H2(g) + CO2(g)
<em>2 moles of NaHCO3 requires 129kJ to produce 1 mole of Na2CO3, 1 mole of H2 and 1 mole of CO2.</em>
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That means, the energy must be added being, thus, an exothermic reaction. The exothermic reactions have ΔH >0.
Thus, right answer is:
A) positive; added
Answer:
oil = burn for 8 days = absurd = doesnt make sense but it happened lol
Explanation:
Answer:
Five
Explanation:
All group 15 elements have five valence electrons, but they vary in their reactivity.
1.123 nano-grams is your answer, do you understand now gimme dat 5 star and brainiest
The answer it the 3 one I hope this helps
