<span>1.8x10^20 atoms x (1 mole / 6.022x10^23 atoms) = 3.0x10^-4 mole</span>
The Earth rotates 365 times during each complete revolution.
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Answer:
The air gap is too narrow to allow the air to circulate easily. This therefore reduces the rate of heat transfer by convection. The trapped air reduces the rate of heat loss through the window by conduction and convection. The room in the house therefore stays warmer for longer reducing heating costs
Answer:
The correct answer is - 27 grams.
Explanation:
salts contain atoms (ions) like Na+ and Cl, these atoms are electrically charged that leads to a big crystal as they can stick together. Those are too heavy to evaporate.
When you heat the hot plate water evaporates but the salt does not leave vessel so, the concentration of salt in the water increases. In the end, the concentration of salt gets so high and the salt will begin to recrystallize into a solid. When all of the water is gone, you will have salt left behind in the same concentration.
Thus, the correct answer is - 27 grams.
Answer:
carbonic acid in water dissolving limestone
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