Which gas has the highest the density at stp?

a. 35.8 g of nitrogen
b. 1.5 g of argon
c. 92.2 g of butane
d. no right answer.

What is the molecular weight of copper

What is the chemical formula for the compound formed between sodium and flour one

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon