Astudent in your class suggests that when most people watch exciting sporting events on television , their pulse rates increase . what is a reliable way to find out if this statement is correct ?

Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. use the periodic table to find molar masses. how many moles of ethanol are present in the sample?

What is the scientific name for weight?

Give one example of a pure (exact) number and of an estimated (measured) number.