Excess amount of hydrochloric acid is added to 2.5 g of pure zinc. The gas produced is collected over water in a gas cylinder at 28 °C and 100.0 kNm2. Calculate : a) the number of mole of gas produced in the reaction. b) the volume of gas collected in the cylinder.

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

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

What is true for a substance that releases energy