Answer:
Molarity = 0.7 M
Explanation:
Given data:
Volume of KCl = 20 mL ( 0.02 L)
Molarity = 3.5 M
Final volume = 100 mL (0.1 L)
Molarity in 100 mL = ?
Solution:
Molarity = number of moles of solute / volume in litter.
First of all we will determine the number of moles of KCl available.
Number of moles = molarity × volume in litter
Number of moles = 3.5 M × 0.02 L
Number of moles = 0.07 mol
Molarity in 100 mL.
Molarity = number of moles / volume in litter
Molarity = 0.07 mol /0.1 L
Molarity = 0.7 M
I think because its the only one to be liquid at normal temperatures.
A because if you multiple it, you will be moving the decimal one time
It’s charge was neutral due to the equal number of protons and electrons. when it becomes an ion it loses 3 electrons leaving behind only 10. the answer is 10. the equation is +13 +(-10)=+3
Answer:
kJ
Explanation:
The thermochemical equation for decomposition of ammonium nitrate is:


Given mass= 50.0 kg =
(1kg=1000g)

According to stoichiometry:
1 mole of
gives = 82.1 kJ of heat
Thus
of
give =
kJ of heat
Thus
kJ of heat is evolved from the decomposition of 50.0 kg of ammonium nitrate.