Carbon atom is tetravalent in nature. how many hydrogen atoms can bind to one carbon atom?

The energy needs of a human population are not affected by

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?