Which of the following questions is most testable through scientific experimentation? which flower looks more attractive in a vase: daisies or roses? which flower has a better smell: daisies or roses? which type of flowers grow better in sunlight: daisies or roses?

Look at the reaction below: ca(hco3)2 --> caco3 + co2 + h2o first, balance the reaction. once balanced, use dimensional analysis or another method to find out how many moles of carbon dioxide will be produced if we start with 16.5 moles of calcium bicarbonate (calcium hydrogen carbonate). = mol of co2 number needs to be reported to three significant figures.

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.