How would the precision of the volume of liquid delivered by the slanted buret be affected?

We just started a new lesson in chemistry and everyone hates it and i dont get it one bit. i hate school. h el p.balanced equationc3h8+5o2-> 3co2+4h2o1.) if you start with 14.8g of propane(c3h8) and 3.44g of oxygen, which is the limiting reactant -check my answer 2.)what mass of excess reagent is left over? 3.)what mass of carbon dioxide can be made? 4.)what mass of water is produced?

In this chemical reaction, 325 grams of barium (ba) react completely. how many moles of lithium (li) are produced?

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?