Why might scientists measure the mass of object rather than the weight of an object?

Scientific theories often make use of

0.004207 round off to 3 significant figures

How many moles are in a 5m solution that has volume of 500ml

How many kilojoules of energy are absorbed when 800.0g of water is heated from 20.0º C to 50.0º C

What wavelengths of light does chlorophyll a absorb best?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?