The given chemical reaction is between calcium carbonate and hydrochloric acid to produce calcium chloride, carbon dioxide and water. This reaction can be represented as,

When the concentration of the reactants is increased, the number of collisions that take place between the reactant molecules increases. This speeds up the reaction. Therefore, when the concentration of HCl is doubled as long as there is enough calcium carbonate to react with HCl, the number of effective collisions giving products increases, this causes the rate of forward reaction to increase.
Answer:
the moon has less mass than earth. the gravitational pull on the moon is less than it is on earth, resulting in a person weighing less on the moon
Explanation:
Answer:
The temperature at which the glass vessel shatter is = 341.33°c
Explanation:
Initial temperature
= 18 °c = 291 K
Initial Pressure
= 0.9 atm
Final pressure
= 1.9 atm
From ideal gas equation
P V = m R T
Here volume & mass & gas constant is constant so Pressure is directly proportional to the temperature.


= 613.33 K = 341.33°c
Therefore the temperature at which the glass vessel shatter is = 341.33°c