Answer:
oxygen and silicon, both are common
3 plus 1 half = 3 and a half, which he does in a hour. 3.5 mph. Happy to help :D
The given statement about standard heat of formation is true.
Explanation:
Yes, it is true that standard heat of formation is same as standard enthalpy of formation. As enthalpy is termed for change in the heat energy occurred in the process of completion of any chemical reaction, the standard enthalpy or heat of formation is termed as the heat energy required to form 1 mole of any substance in its standard state from its original, parent or constituent elements in their standard state. Basically, it defines the amount of energy required by the system or compound for its formation from different elements under different synthesis conditions but the nature of the parent samples and temperature and pressure should be kept standard.
So the given statement is true.
When some of the sugar added to iced tea remains undissolved at the bottom of the glass, it is the <span>saturated solution </span>at this temperature.
Explanation:
Evirmental disruption because if they had stability then they would not need change. The other two don't make sense....I hope this helps