Rock salt mixed with ice actually lowers the temperature of the salt/ice mix. Physical or chemical property?

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough