Magnesium reacts with hydrochloric acid to produce magnesium chloride and hydrogen. In
another investigation, a student reacted 20cm
of hydrochloric acid with a concentration of
1.5 mol dm-3 with excess magnesium.
1) Write a balanced chemical equation for the
reaction.
11) Calculate the number of moles of hydrochloric
acid used.
111) Determine the number of moles of magnesium
chloride produced.
iv) Calculate the mass of magnesium chloride
produced.
​

Which fact represents evidence for the big bang theory?

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.

What type of chemical reaction occurs between silver nitrate (agno3) and copper (cu)? the equation i was given is 2agno3 + cu —> 2ag+ cu(no3)2.