Of the reactants and product determines whether energy will be released or absorbed during a chemical reaction

Which reactions are oxidation-reduction reactions? 1. FeS (s) + 2HCl (aq) → H2S (g) + FeCl2 (g) 2. AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 3. 2C3H6 (g) + 9O2 (g) → 6CO2 (g) + 6H2O (g) 4. Fe2O3 (s) + 3CO (g) → 2Fe (l) + 3CO2 (g)

True or false An organism needs two dominant alleles to express that trait.

The space shuttle Endeavor is launched to an altitude of 400,000 m above the surface of the Earth. The shuttle travels at an average rate of 750 m/s. How long will it take for Endeavor to reach its orbit? Question 4 options: 0.53 s 533.

A tritium nucleus is formed by combining two neutrons and a proton. the mass of this nucleus is 9.106 * 10-3 universal mass unit less than the combined mass of the particles from which it is formed.

The air outside is so warm that this snowman is melting. During melting, the water molecules (gain/lose) thermal energy. How does the motion of the molecules change during melting

What change occurs in the atoms as we move down each chemical family?

3. The density of mercury is 13.6 g/ml. Find the volume of 150 g

scientist have found many marine fossils on the mountain far from any ocean or sea what is the best explanation for these fossils

What is population and air

You are in space and running out of water. You do have a great deal of magnesium carbonate pentahydrate. It is possible to extract the water from this.