When you excite atoms of different elements above their ground state, they emit different color lights.
B)it is endothermic and entropy decreases
Answer:
8.73
Explanation:
when you are adding or subtracting numbers, the sigfig (significant figure) is based on how many numbers after the decimal. with this info, we can see that 15.67 has 2 sigfigs and 6.943 has 3 sigfigs. when you subtract normally, you would get 8.727, which has 3 sigfigs, so you would round the last 7 up to get 8.73 with 2 sigfigs!
also it is to 2 sigfigs because we know that we go by the least number of sigfigs. hope this helped!
Solution :
Compound Ksp
FeS
Ksp of and both compounds dissociate the same way. Hence is more soluble than
is less soluble than
It is not possible to determine CD - is more or less soluble than as though they have a different Ksp values their molecular dissociation is also different and they may have a close solubility values.
can be directly compared with PbS,
100
1-s s 2s
Ksp =
Hence they can be directly compared by Ksp values, smaller the Ksp, smaller the solubility.
For Silver Chloride
1 0 0
1 - s s s
Ksp
Hence, they can be directly compared by Ksp values, smaller the Ksp, smaller the solubility.
Answer: 0.374 mol CO2
Explanation:
We can calculate the number of moles of CO, n, required to produce the specified quantity of heat. This is done by dividing the required released heat, q, by the enthalpy of formation per unit mole of the substance, , based on the chemical equation, such that:
Therefore, 0.374 mol of CO2 must be reacted in order to produce 147 kJ of energy?