Qual a massa, em gramas, de duas moléculas de CH4? C = 12g H = 1g

Resposta: 5,31x10^-23

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Describe the Coriolis effect in your own words

The temperature of 360 mL of a gas is decreased from 20°C to - 40°C while the pressure is held constant. What is the new volume of the gas?

What is true about both sodium and gold? They are very reactive. They are volatile. They are metals. They are in the same group.

1. the purpose of the aqueous solutions in a galvanic cell is to? a. provide ions to be oxidized and reduced b. provide a path for the free flow of electrons c. maintain charge balance in the cell d. correct any volume changes in the cell 2.

How many moles are present in 17.4 g of lead?

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?