Haemoglobin contains 0.33% by mass of iron there are 2fe atoms in 1molecule of haemoglobin what is rmm haemoglobin

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots