Four different food colourings are analysed using chromatography. The results are shown on the chromatogram. The diagram is not drawn to scale.
Which food colouring contains a component with an R value of 0.3?
solvent front
10 cm
8cm-
0
6cm-
0
0
Acm
0
2 cm
0
0
baseline
9
B

Suppose you got a low yield of benzoin from your benzoin condensation reaction and thus only have 0.300 g of benzoin to use as the starting material for this reaction. how much concentrated nitric acid should you add? (concentrated nitric acid is 15.8 m). write your answer in the form x.xx ml

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Write the balanced equation for a reaction between aqueous nitric acid (hno3) and solid lithium metal (this is a single replacement reaction)