2Na(s) + CaCl2(aq) 2NaCl(aq) + Ca(s) is an example of which type of reaction?
decomposition
synthesis
double replacement
single replacement

Classify this reaction: 2al+n2-> aln.

Find the number of moles of argon in 364g of argon.

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