Suppose a 32.9-g sample of CaSiO3 has reacted with 31.8 L of HF at 27.08C and 1.00 atm. Assuming the reaction goes to completion, calculate the mass of the SiF4 and H2O produced in the reaction. CaSiO3+6HF--->CaF2 + SiF4 +3H2O

it is a good conductor

explanation:

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.