How many grams of Na 2 CO 3 are needed to produce 1000 g of sodium bicarbonate (NaHCO 3 ) (I’ll mark you as brainlister)

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

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

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