Answer:
1.) To convert between grams and moles, you would use the substance's molar mass. To go from grams to moles, divide the grams by the molar mass. 600 g58.443 g/mol = 10.27 mol of NaCl. It has been found that 1 mol of any gas at STP (Standard Temperature and Pressure = 0 °C and 1 atm) occupies 22.4 L
It stands to me it looks like it is a caution
The atomic mass of elements are usually decimals as it makes the atomic masses more accurate and exact. The mass of an atom is also the weighted average of the elements known isotopes and since it’s the average, the number is most likely going to be a decimal number.
I hope this helps :)
Answer: A
The sun doesn't make a difference in processes that take place underground, unless they're asking about temperature of the Earth, which they're not.