7. A pupil was asked to investigate three metal oxides XO, Y20 and ZO. On heating strongly, XO broke down into a metal X and oxygen. The other two oxides did not break down.
a) From this evidence what can be deduced about the reactivity of metal X?

b) How could you test Y20 and ZO in order to find out which was the more reactive of the metals Y and Z?

Gwhich r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? which r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? −ch2−oh −ch2−o||c−nh2 −ch2−coo− −ch2−ch2−ch2−ch2−n+h3

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.