The reaction in a fuel cell is used to power cars and other devices. Is it an endothermic or exothermic reaction? Explain.

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Which statement can best be concluded from the ideal gas law?

Select the correct answer from each drop-down menu.describe what happens to a carbon-11 atom when it undergoes positron emission.the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons