A manufacturer made a trophy that is 1.55 ft tall. When a team receives it, they measure it to be 1.45 ft tall. What was the percent error in the am^ prime s measurement?

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.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.