Answer:
not sure, but you know what?
Explanation:
you are amazing! keep doing what youre doing!
that seems very false but I believe its the second one
<span>Metalloids have the properties of metals and nonmetals.</span>
Answer:
D.Geologists use data from three or more data stations to determine the location of the epicenter.
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>
<em />
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
