Question 2 In the preparation of carbon (IV) oxide,
excess dilute hydrochloric acid was added to
10g of calcium trioxocarbonate (IV).
a) Calculate the amount of calcium
trioxocarbonate (IV) in moles used in
the preparation
b) Calculate the volume of carbon(IV)
oxide produced at s. t.p.
[H = 1.0 0 = 16.0 Ca = 40.0

I think a its right i hope

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.