Which substance is a homogeneous mixture?
a: cereal
b: silver
c: nickel
d: shampoo

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

All cells are made of four types of acids, lipids, proteins, and carbohydrates.

22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g