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Question on past exam paper. 550 mg sample of vitamin B6 was burned completely in presence of Oxygen. 1145mg of CO2 and 322mg of H2O were produced. A kjedahl analysis was also carried out and the sample was found to contain 8.30% Nitrogen. What is the percentage Carbon and Hydrogen in the Vit...

Recently I've started spitting a lot of blood when I brush my teeth. I've always spat a little bit of blood after brushing teeth, but now all of a sudden I'm spitting a lot lot more. Almost as if I have a large cut in my mouth and I'm spitting blood from it. The backstory is that I've started...