Answer:
A: 11 protons and 21 neutrons
Explanation:
Hopefully this helps!
No it isn’t.
do u mean quadratic either way it’s isn’t.
sorry for not much help xox
<h3> Please marks me as brainliests..please for my effort..</h3>
Explanation:
<h3>Calculate the empirical formula.</h3><h3> In any empirical formula problem you must first find the mass % of the elements in the compound. ... </h3><h3> Then change the % to grams. ... </h3><h3> Next, divide all the masses by their respective molar masses. ... </h3><h3> Pick the smallest answer of moles and divide all figures by that.</h3>
Answer:
C
Explanation:
An endothermic reaction has a positive enthalpy change (∆H> 0).
An endothermic reaction is where the energy of the products is higher than that of the reactants.
∆H= energy of products -energy of reactants
Thus, ∆H is positive since the value of the energy of products is greater than that of the reactants.
Exothermic reactions have a negative ∆H.
In an endothermic reaction, heat is absorbed and thus if we were to include heat in teh chemical equation, it would be part of the reactants not products.
∆H does not indicate the amount of activation energy (Ea). All reactions have activation energy (exothermic and endothermic reactions). Activation energy is the minimum amount of energy required for the reaction to proceed.
Answer:
a
Explanation:
it would be the most reasonable