Please help according to the laws of conservation of mass how much zinc was present in the zinc carbonate
a. 40 g
b. 88 g
C. 104 g
d. 256 g

Which best describes why nh4+ can form an ionic bond with cl-?

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

According to the tide table below what time of day will the highest tide occur?