Which statement is true if the (triangle here) Hrxn of a reaction is positive?

The reaction is endothermic.

The reaction is exothermic.

There is more reactant than product.

There is more product than reactant.

If hydrogen composes 11% of a 100 gram sample of water, what is the mass of the hydrogen in the sample?

Calculate the correct number of moles AND formula units in 7.3x10^-3 g of CaSO4

When magnesium sulfite decomposes, the solid transforms into magnesium oxide and sulfur dioxide. The reaction is as follows: MgSO3 (s) → MgO (s) + SO2 (g) According to the Gibbs free energy, at what temperature will this reaction be spontaneous?

What replaced the early pharmacists role in the production of medicine

Ben is exercising his pony on a large, oval track. The pony is trotting at a constant speed of 10 m/s around the track. Which statement can be made about the pony's acceleration? A) The pony is decelerating. B) The rate of acceleration varies.

Which of the following has the greatest first ionization engergy li, be, b or c

If we know that 10.0 cm3 of ice has a mass of 9.19 g what is the density of ice

1. The is the particle in the nucleus of the atom that carries a positive charge and is counted to identify the atomic number. What's the answer

How many grams are there in 5.00 moles of lead Pb?

A large body in space that orbits a star and does not produce light of its own