Student B because it requires a hypothesis
Pure water has a freezing point of 0 degrees centigrade but seawater has a lower freezing point because of the salt (NaCl)
Answer:
CH₄
Explanation:
CH₃OH has hydrogen bonding due to the OH group present
NH₃ also has hydrogen bonding due to the NH bonds
H₂S has dipole-dipole forces present due to the polar SH bonds
HCl also has dipole-dipole forces due to the polar HCl bond
Regard the principle of utilization of two gas.
Make a consistent control of hardware containing gas.
Make a consistent control of weight diminishing valves giving gas.
No smoking zone.
