2C3H7OH + 9O2 → 6CO2 + 8H2O
Answer:A
Explanation: I learned it from a gizmo
A decrease in the overall volume of gases namely hydrogen would prevent nuclear fusion in a nebula.
You haven't attached any options but anyways, to help you with your question, elements belonging to the same group (e.g. alkali metals, noble gases) all have the same chemical properties. Hydrogen, for example, have the same properties with Sodium, Potassium and Lithium.
Explanation:
Elements in the same group have same number of valence electrons. And we know, the elements which have same number of valence electrons, have similar physical and chemical properties. Hence, the elements in the same group have similar physical and chemical properties.