2. How many grams are there in 1.5 x 1025 molecules of CO2? * 3. A sample of NH3 gas occupies 75.0 liters at STP. How many molecules is this?
Need help asap on 2 and 3 I’ll set you as brainliest if you give the correct work and answer

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.