Both processes occur in place. No movement is involved in weathering. Chemical weathering involves a chemical change in at least some of the minerals within a rock. Mechanical weathering involves physically breaking rocks into fragments without changing the chemical make-up of the minerals within it.
I'm actually not sure... but maybe this will help!
http://www.dummies.com/education/science/chemistry/how-to-identify-chiral-centers-in-a-molecule/
The only one example of a chemical change would be:
B. Leaving cheese out to get moldy.
Because there is a chemical reaction.
Answer:
Explanation:
Hello.
In this case, since the normal boiling point of X is 117.80 °C, the boiling point elevation constant is 1.48 °C*kg*mol⁻¹, the mass of X is 100 g and the boiling point of the mixture of X and KBr boils at 119.3 °C, we can use the following formula:
Whereas the Van't Hoff factor of KBr is 2 as it dissociates into potassium cations and bromide ions; it means that we can compute the molality of the solution:
Next, given the mass of solventin kg (0.1 kg from 100 g), we compute the moles KBr:
Finally, considering the molar mass of KBr (119 g/mol) we compute the mass that was dissolved:
Best regards.
Answer: The correct statement is the liquid solution might have been dangerous to touch with bare hands.
Explanation:
In the question, it is given that Ari has wiped the spilled liquid with paper towels without putting on the gloves.
While working in a lab, one must follow some safety rules:
- There are chemicals all around the lab, so it should be handled with care that is by wearing gloves.
- If by chance there is spilling on liquid on the shelf, it should be cleaned with the help of paper towels while wearing gloves.
- Any chemical must not be touched with bare hands.
Hence, the correct answer is the liquid solution might have been dangerous to touch with bare hands.
