B) An open beaker holds 1500 g of water saturated with carbon dioxide at 20°C. The beaker is heated to 60°C.
i) What mass of carbon dioxide would be expected to be lost from the beaker? (2 marks)
ii) The actual loss in mass of the beaker and contents is greater than the value calculated
in part i) Suggest why. (1 mark)

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

Imagine that a new planet is discovered with two moons of equal mass: moon a and moon b. the mass of the new planet is greater than the combined mass of its moons. moon a is farther away from the new planet than moon b. what is the planet's gravitational pull on moon a compared to the planet's gravitational pull on moon b? the planet's gravity repels moon a with a greater force than it repels moon b, which is why moon a is farther away. the gravitational pull on moon b is greater than on moon a because moon b is closer to the new planet than moon a. the gravitational pull on moon b is greater than on moon a because moon b is farther away from the new planet than moon a. the gravitational pull on moon a is the same as the gravitational pull on moon b because distance does not affect the planet's gravity.