How many kilograms of dry chemical must be added to 90L of water to produce a 0.2 chemical solution?

When lead oxide is heated in a test tube the walls become coated with what? What idea of Darwin's based on fossils and the modern organisms you found basically says that genetic changes are inherited by later generations? What is the smallest submarine? What do people say about future research concerning quantum mechanics? How many kg in one ton? Why does copper wire resist the floor of electrons more than other copper wire? How would a cell manages to harvest the energy stored in glucose and still maintain internal temperatures conducive to life? Why is the dipole moment of water less than the dipole moment of alcohol? How do you use a balance to find balance? What kind of complaints has AA warranty received? What minerals originate as a product of chemical weathering? What types of stream valley forms in mountainous areas? How humans can affect phosphorus cycle? What is interlocking rhythm? If it's 1046 in NYC what time is it in Settle Washington? What are the impacts of earthquakes on the human environment? How do tetraploids and aneuploids form? How many centimeters are 15.5 feet? How are landslides related to mass wasting? Based on the greenhouse effect if the amount of carbon dioxide in the air decreases what would happen?

How many kilograms of dry chemical must be added to 90L of water to produce a 0.2 chemical solution?