Answer: The new volume of the air in the syringe is 7.3 mL.
Explanation:
Given:
= 2.0 mL,
= 1.02 atm, 
= ?,
= 1.27 atm, 
Formula used to calculate the new volume in syringe is as follows.

Substitute the values into above formula as follows.

Thus, we can conclude that the new volume of the air in the syringe is 7.3 mL.
Answer:
1 mole of calcium contains 6.023
atoms.
Explanation:
1 mole is the amount of a substance that contains exactly
constituent particles. 1 mole of a substance is always equal to the atomic mass of the element.
Hence, 1 mole of calcium will also have
atoms.
Number of atoms in 1 mole calcium = 6.023
atom
Answer:
hydrochloric acid
Explanation:
The hydrochloric acid in this reaction is the limiting reactant. A limiting reactant is the reactant that is used up in a chemical reaction. It determines the extent of the reaction.
Since the solution indicates a basic one after the end of the reaction, this suggests that more of the sodium hydroxide is still left unreacted with.
The reactant in excess supply here is the sodium hydroxide and the bulk of it is till left in solution.
Answer:The reaction absorbs 8100 J of energy from the surroundings as it proceeds.
Explanation: