Water (H2O) contains 8 grams of oxygen for every 1 gram of hydrogen. Show why this statement is true. The formula for water is H2O. There is one atom of oxygen for every two atoms of hydrogen.
The molar mass of oxygen is ?
The molar mass of hydrogen is?

Total mass of hydrogen in water ? (in grams)
Total mass of oxygen in water ? (in grams)

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

How does concentration affect reaction rate

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.