Answer:
1.23 moles
Explanation:
Ideal gas law
PV = n RT R = .082057 L-atm/mol-K
25 C = 298.15 K
12 (2.5) = n (.082057) (298.15) n = 1.23 moles
Well we need to see the fossil
Answer:
yes
Explanation:
to identify an atom you need to know either it's atomic number or it's proton number
while the neutron is used to determine it's atomic mass
Answer:
Reactants have more energy than products
Explanation:
Generally, in an exothermic reaction heat is released. In other words, energy is released. So you start with reactants which have a set amount of stored chemical energy, and you lose some in the reaction. Since energy is 'leaving', the stored chemical energy in the products is less than what we started with in the reactants. When given a graph, you can tell this is true because going from left to right, the line representing the stored chemical energy will start at a higher level than where it ends.
Answer:
The correct answer is 0.25 moles/liter
Explanation:
Molarity is a measure of concentration and is defined as the moles of solute in 1 liter of solution.
2 L solution-----0,5 moles of CaO
1 L solution -----x= (1 L solutionx0,5 moles of CaO)/2 L solution =
<em>x=0, 25 moles of Cao ---> 0,25M</em>
