A substance X reacts with ammonium nitrate to produce a gas that turns damp red litmus paper blue. X must therefore be: a) A salt
b) A catalyst
c) An alkali
d) An acid

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Why does a plastic bottle that is sealed at a high altitude change it’s shape when taken to lower altitude

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy