A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass? (The molecular mass of silicon is 28 g/mol.)

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88

Connect the whole numbers on the periodic table to indicate what they represent?

Is a chemical message sent by another individual.