PLEASE HELP! The chemical formula of a compound provides information about the elements present in the compound and their
ratios. A) grams B) ratio C) mole D) empirical

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?