Temperature
A measure of kinetic energy of particle motion within a substance is temperature.
Answer:
45.165 × 10²³ molecules
Explanation:
Given data:
Number of moles of SO₂ = 7.50 mol
Number of molecules = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
7.50 mol × 6.022 × 10²³ molecules
45.165 × 10²³ molecules
NH₃ + H₂O ⇄ NH₄⁺ + OH⁻
pOH=-lg[OH⁻]
pOH = 14-pH
14-pH = -lg[OH⁻]
[OH⁻]=10^(pH-14)
[OH⁻]=10^(11.8-14)=0.00631 = 6.31·10⁻³ mol/L
THEY ARE ALL NONMETALS ARE THE CORRECTA NSWER
Answer: That means that the concrete will increase it temperatures quicly compared with other substances whose specific heat is higher.
Explanation:
Specific heat is the amounf of heat to raise the temperature of 1 gram of substance (or kg depending on the unis used) 1 Celsius degree.
The water, for example, has a high specific heat. That means that you need to add a great amount of heat to raise its temperature, compared with, for exampple the concrete, which is told to have a smaller heat capacity.
You can see that mathematically form the formula for heat released or absorbed from/by a substance:
Q = mass × Specific heat × ΔT
⇒ ΔT = Q / (mass × Specific heat).
So, for the same mass, a certain amount of heat (Q) will result in a bigger ΔT when the specifif heat is smaller.