What is the percent by mass of oxygen in H2SO4? [formula mass = 98] (1) 16% (3) 65% (2) 33% (4) 98%

Which correctly states the temperature at which the reaction took place and whether the reaction is spontaneous or nonspontaneous? Use G = H - TS.

Consider the reaction below. Mg (s) + 2HCl (aq) - - > H2 (g) + MgCl2 (aq) What is the most likely effect of an increase in pressure on this reaction? The reactant surface area increases. The reaction rate decreases.

The soil of an agricultural field is too basic what can we do to correct it

What is one measurement needed to calculate the speed of an object? Direction, mass, Time, or Velocity?

A gas mixture contains each of the following gases at the indicated partial pressures:, 221O2torr, N2,131 torr; and He 131 torr What mass of each gas is present in a 1.30 - L sample of this mixture at 25.0 degrees C?

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?