Which equation below is balanced? 2Al + 6HCl → 3AlCl3 + 3H2
CS2 + 2O2 → CO2 + SO2
NO2 + H2O → HNO3 + NO
Zn + H2SO4 → H2 + ZnSO4

Consider an organism that is eukaryotic, found in both unicellular and multicellular forms, may resemble a plant but is not photosynthetic, has chitin in its cell walls, and absorbs organic nutrients from decomposing material in the environment. this organism would be classified as which of the following types of organisms? a. fungib. protozoac. bacteriad. archaea

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Why do we perceive objects as retaining their brightness under different lighting levels?