42. What is the source of the electric current produced by a voltaic cell?

a spontaneous oxidation-reduction reaction

competing salt bridges

non-spontaneous reduction at the cathode

an imbalance of ion charges

What mass of chlorine gas is necessary to synthesize 174 liters of hydrogen chloride at STP?

Sodium inside a star is most likely formed by which process? fusion beta emission alpha emission fission

According to periodic table which elements has seven valence electrons

How many protons are in a hydrogen Atom

Change of state from a solid directly to a gas

How many moles of methane are produced when 25.1 moles of carbon dioxide gas react with excess hydrogen gas?

Which reaction releases the greatest amount of energy per kilogram of reactants? A) neutron + uranium-235 ➡️ barium-141 + krypton-92 + 3 neutrons B) 2C + H2 ➡️ C2H2 C) C3H8 (g) + 5O2 (g) ➡️ 3CO2 (g) + 4H2O (l) D) NaOH (aq) + HCl (aq) ➡️ NaCl (aq) +

Name the hardest artificial substance known?

Suzzane has type A - blood. Which thpe of blood could she receive in a blood transfusion?

What can I draw or write about that's related to science?