100 %cuni calculate the amounts of solid s and liquid
Answer:
destroyed, from, endothermic
Explanation:
Energy is conserved in chemical reactions. It is neither created nor destroyed but can be transferred from one form to another.
An exothermic reaction transfers energy from the reacting substance to the surroundings. The body of the container feels warm. An exothermic reaction has a negative value of enthalpy.
An endothermic reaction transfers energy from the surroundings to the reacting substance. The body of the container feels cold. In an endothermic reaction, enthalpy is positive.
<em>Answer:</em>
<em>C. Mechanical energy transforms into chemical energy.</em>
<em>Explanation:</em>
<em>Mechanical energy is used to chew the food, which is made up of chemical bonds. When we chew, those bonds break, releasing chemical energy that we utilize and consume.</em>
<em>Hope this helped. Have a nice day.</em>
2H2 + O2 = 2H2O since two elements created a compound, in this case water.
The question is incomplete, the complete question is shown in the image attached to this answer
Answer:
Most similar - sulphur
least similar- gallium
Explanation:
The compound formed when hydrogen reacts with oxygen is water. The chemical formula of water is H2O.
Water is very similar to H2S which is the compound formed when hydrogen reacts with sulphur. The bonds in water and H2S are both polar covalent bonds.
However, gallium is a metal and its hydride (GaH3) is least similar to water.
