What is the bond angle of a methane molecule that contains four hydrogen atoms bonded to one carbon atom? 90°

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li