In a constant‑pressure calorimeter, 70.0 mL of 0.320 M Ba(OH)2
was added to 70.0 mL
of 0.640 M HCl.

The reaction caused the temperature of the solution to rise from 23.56 ∘C
to 27.92 ∘C.
If the solution has the same density and specific heat as water ( 1.00 g/mL
and 4.184J/g⋅°C,)
respectively), what is Δ
for this reaction (per mole H2O
produced)? Assume that the total volume is the sum of the individual volumes.

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true