How to calculate energy change in a reaction

On a ceiling, there were tiny droplets of blood less than 1 mm in diameter. the victim was lying in a pool of blood. no other marks were found on the other walls.

Winnipeg is refilling the pool. how many gallons of water will it take if the pool is 50m by 25m by 1.5m?

A chemist carefully measures the amount of heat needed to raise the temperature of

The decomposition reaction is: (a.) A+B - - > AB (b.) AB+CD--> A+B (d.) none of the above

Great white sharks live in the waters around California and feed on seals. Changes in his ecosystem have caused the seal population to decrease. Which result is an adaptation by sharks when there are fewer seals to eat? A.

Formula for sulfur tetrafluoride

Geologists think that parts of the Appalachian Mountains formed originally from sediments accumulating in shallow swamps. The weight of the sediments caused the area beneath them to sink, allowing more sediments to accumulate.

What volume would 1.5 mol of nitrogen gas occupy at standard temperature and pressure?

State three reason why do you think air is a mixture and water a compound?

Defined the following convection