describe briefly how a pure dry sample of barium sulphate can be prepared using sodium sulphate as one of the reagent

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?

Aman applies a force of 500n to push a truck 100m down the street how much does he do?

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.